You, John J.; Singer, Daniel E.; Howard, Patricia A.; Lane, Deirdre A.; Eckman, Mark H.; Fang, Margaret C.; Hylek, Elaine M.; Schulman, Sam; Go, Alan S.; Hughes, Michael; Spencer, Frederick A.; Manning, Warren J.; Halperin, Jonathan L.
Background: The risk of stroke varies considerably across different groups of patients with atrial fibrillation (AF). Antithrombotic prophylaxis for stroke is associated with an increased risk of bleeding. We provide recommendations for antithrombotic treatment based on net clinical benefit for patients with AF at varying levels of stroke risk and in a number of common clinical scenarios. Methods: We used the methods described in the Methodology for the Development of Antithrombotic Therapy and Prevention of Thrombosis Guidelines: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines article of this supplement. Results: For patients with nonrheumatic AF, including those with paroxysmal AF, who are (1) at low risk of stroke (eg, CHADS2 [congestive heart failure, hypertension, age ≥ 75 years, diabetes mellitus, prior stroke or transient ischemic attack] score of 0), we suggest no therapy rather than antithrombotic therapy, and for patients choosing antithrombotic therapy, we suggest aspirin rather than oral anticoagulation or combination therapy with aspirin and clopidogrel; (2) at intermediate risk of stroke (eg, CHADS2 score of 1), we recommend oral anticoagulation rather than no therapy, and we suggest oral anticoagulation rather than aspirin or combination therapy with aspirin and clopidogrel; and (3) at high risk of stroke (eg, CHADS2 score of ≥ 2), we recommend oral anticoagulation rather than no therapy, aspirin, or combination therapy with aspirin and clopidogrel. Where we recommend or suggest in favor of oral anticoagulation, we suggest dabigatran 150 mg bid rather than adjusted-dose vitamin K antagonist therapy. Conclusions: Oral anticoagulation is the optimal choice of antithrombotic therapy for patients with AF at high risk of stroke (CHADS2 score of ≥ 2). At lower levels of stroke risk, antithrombotic treatment decisions will require a more individualized
de Jong, Paulien G; Goddijn, Mariëtte; Middeldorp, Saskia
BACKGROUND Although an association between thrombophilia and pregnancy loss has been observed in many studies, little is known about the pathophysiological mechanisms behind this association. Considering the association between thrombophilia and pregnancy loss, the efficacy of antithrombotic therapy for women with pregnancy loss (with or without thrombophilia) has been studied for the past 30 years. METHODS We performed a comprehensive review of the literature on the strength of the association between thrombophilia and pregnancy loss, the pathophysiological mechanisms and the efficacy of antithrombotic therapy to increase the chance of live birth. RESULTS The association between pregnancy loss and thrombophilia varies according to the type of thrombophilia (e.g. antiphospholipid syndrome versus forms of inherited thrombophilia) and according to the type of pregnancy loss (single versus recurrent pregnancy loss and early versus late pregnancy loss). Thrombophilia may induce thrombosis in decidual vessels or impair placentation through hypercoagulability and inflammation, but these hypotheses need further verification. For women with antiphospholipid syndrome, evidence from small-sized trials suggests a beneficial effect of antithrombotic therapy but additional randomized controlled trials are essential to confirm this. Whether antithrombotic therapy increases the chance of live birth in women with inherited thrombophilia is unknown. Recent randomized controlled trials have consistently shown that antithrombotic therapy does not increase the chance of live birth in women with unexplained recurrent miscarriage. CONCLUSIONS There are large gaps in knowledge and a lack of evidence for treatment of women with pregnancy loss with thrombophilia. To provide a solid base for clinical practice, further studies on the role of coagulation in reproduction, as well as international collaborations in randomized controlled trials of antithrombotic therapy in women with pregnancy
Kearon, Clive; Comerota, Anthony J.; Prandoni, Paolo; Bounameaux, Henri; Goldhaber, Samuel Z.; Nelson, Michael E.; Wells, Philip S.; Gould, Michael K.; Dentali, Francesco; Crowther, Mark; Kahn, Susan R.
Background: This article addresses the treatment of VTE disease. Methods: We generated strong (Grade 1) and weak (Grade 2) recommendations based on high-quality (Grade A), moderate-quality (Grade B), and low-quality (Grade C) evidence. Results: For acute DVT or pulmonary embolism (PE), we recommend initial parenteral anticoagulant therapy (Grade 1B) or anticoagulation with rivaroxaban. We suggest low-molecular-weight heparin (LMWH) or fondaparinux over IV unfractionated heparin (Grade 2C) or subcutaneous unfractionated heparin (Grade 2B). We suggest thrombolytic therapy for PE with hypotension (Grade 2C). For proximal DVT or PE, we recommend treatment of 3 months over shorter periods (Grade 1B). For a first proximal DVT or PE that is provoked by surgery or by a nonsurgical transient risk factor, we recommend 3 months of therapy (Grade 1B; Grade 2B if provoked by a nonsurgical risk factor and low or moderate bleeding risk); that is unprovoked, we suggest extended therapy if bleeding risk is low or moderate (Grade 2B) and recommend 3 months of therapy if bleeding risk is high (Grade 1B); and that is associated with active cancer, we recommend extended therapy (Grade 1B; Grade 2B if high bleeding risk) and suggest LMWH over vitamin K antagonists (Grade 2B). We suggest vitamin K antagonists or LMWH over dabigatran or rivaroxaban (Grade 2B). We suggest compression stockings to prevent the postthrombotic syndrome (Grade 2B). For extensive superficial vein thrombosis, we suggest prophylactic-dose fondaparinux or LMWH over no anticoagulation (Grade 2B), and suggest fondaparinux over LMWH (Grade 2C). Conclusion: Strong recommendations apply to most patients, whereas weak recommendations are sensitive to differences among patients, including their preferences. PMID:22315268
Monagle, Paul; Chan, Anthony K. C.; Goldenberg, Neil A.; Ichord, Rebecca N.; Journeycake, Janna M.; Nowak-Göttl, Ulrike
Background: Neonates and children differ from adults in physiology, pharmacologic responses to drugs, epidemiology, and long-term consequences of thrombosis. This guideline addresses optimal strategies for the management of thrombosis in neonates and children. Methods: The methods of this guideline follow those described in the Methodology for the Development of Antithrombotic Therapy and Prevention of Thrombosis Guidelines: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines. Results: We suggest that where possible, pediatric hematologists with experience in thromboembolism manage pediatric patients with thromboembolism (Grade 2C). When this is not possible, we suggest a combination of a neonatologist/pediatrician and adult hematologist supported by consultation with an experienced pediatric hematologist (Grade 2C). We suggest that therapeutic unfractionated heparin in children is titrated to achieve a target anti-Xa range of 0.35 to 0.7 units/mL or an activated partial thromboplastin time range that correlates to this anti-Xa range or to a protamine titration range of 0.2 to 0.4 units/mL (Grade 2C). For neonates and children receiving either daily or bid therapeutic low-molecular-weight heparin, we suggest that the drug be monitored to a target range of 0.5 to 1.0 units/mL in a sample taken 4 to 6 h after subcutaneous injection or, alternatively, 0.5 to 0.8 units/mL in a sample taken 2 to 6 h after subcutaneous injection (Grade 2C). Conclusions: The evidence supporting most recommendations for antithrombotic therapy in neonates and children remains weak. Studies addressing appropriate drug target ranges and monitoring requirements are urgently required in addition to site- and clinical situation-specific thrombosis management strategies. PMID:22315277
Alonso-Coello, Pablo; Bellmunt, Sergi; McGorrian, Catherine; Anand, Sonia S.; Guzman, Randolph; Criqui, Michael H.; Akl, Elie A.; Olav Vandvik, Per; Lansberg, Maarten G.; Guyatt, Gordon H.
Background: This guideline focuses on antithrombotic drug therapies for primary and secondary prevention of cardiovascular disease as well as for the relief of lower-extremity symptoms and critical ischemia in persons with peripheral arterial disease (PAD). Methods: The methods of this guideline follow those described in Methodology for the Development of Antithrombotic Therapy and Prevention of Thrombosis Guidelines: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines in this supplement. Results: The most important of our 20 recommendations are as follows. In patients aged ≥ 50 years with asymptomatic PAD or asymptomatic carotid stenosis, we suggest aspirin (75-100 mg/d) over no therapy (Grade 2B) for the primary prevention of cardiovascular events. For secondary prevention of cardiovascular disease in patients with symptomatic PAD (including patients before and after peripheral arterial bypass surgery or percutaneous transluminal angioplasty), we recommend long-term aspirin (75-100 mg/d) or clopidogrel (75 mg/d) (Grade 1A). We recommend against the use of warfarin plus aspirin in patients with symptomatic PAD (Grade 1B). For patients undergoing peripheral artery percutaneous transluminal angioplasty with stenting, we suggest single rather than dual antiplatelet therapy (Grade 2C). For patients with refractory claudication despite exercise therapy and smoking cessation, we suggest addition of cilostazol (100 mg bid) to aspirin (75-100 mg/d) or clopidogrel (75 mg/d) (Grade 2C). In patients with critical limb ischemia and rest pain unable to undergo revascularization, we suggest the use of prostanoids (Grade 2C). In patients with acute limb ischemia due to acute thrombosis or embolism, we recommend surgery over peripheral arterial thrombolysis (Grade 1B). Conclusions: Recommendations continue to favor single antiplatelet therapy for primary and secondary prevention of
Coagulability increases during pregnancy, and thromboembolism can easily occur. Venous thromboembolism is a cause of death in pregnant women, but arterial thrombosis such as ischemic stroke in pregnancy is also not uncommon. In pharmacotherapy for thromboembolism in pregnant women, fetal toxicity and teratogenicity must be carefully considered. As anticoagulants in pregnant women, unfractionated heparin and low-molecular-weight heparin are recommended, but warfarin is not recommended since it has a low molecular weight and crosses the placenta. Various types of new oral anticoagulant drugs have been available in Japan since 2011. However, the Japanese package inserts for these anticoagulants advise quite cautious administration in pregnant women. The guidelines on pregnant women include less information about antiplatelet drugs than anticoagulant drugs. Aspirin may cause teratogenicity and fetal toxicity, and perinatal mortality is increased. However, when low doses of aspirin are administered as antiplatelet therapy, the US Food and Drug Administration has assigned pregnancy category C, and treatment is relatively safe. Neurosurgeons and neurologists commonly encounter pregnant women with thromboembolism, such as ischemic stroke. Up-to-date information and correct selection of drugs are necessary in consultation with specialists in perinatal care.
The principal complication of the atrial arrythmias is the thrombo-embolic accident, notably the cerebro-vascular accident. The efficacity of the oral anticoagulants in reducing cerebro-vascular accidents has been demonstrated in numerous studies. This is significantly superior to that obtained with the anti-platelet drugs. However, the anti-vitamin K drugs (warfarin) carry a risk of serious haemorrhage of around 5% per year. This restricts the proposal of this treatment to patients with an elevated risk of vascular accidents: age, diabetes, previous cerebro-vascular accidents, and cardiac failure are the risk factors. Nevertheless, the risk of haemorrhage is responsible for an under prescription of the anticoagulants in the elderly. This explains the interest aroused by alternative therapeutics: the results of trials on ximelagatran, a direct anti-thrombin, are promising. In patients with an arrythmia, cardioversion carries a thrombo-embolic risk of around 1%. This risk is reduced by prior anticoagulant treatment. The procedure for this treatment is orientated by a trans-oesophageal echocardiogram. The incertitude of the duration of anticoagulant therapy without cardioversion calls for respect of the arrythmia. The treatment of this is limited to control of the cardiac rhythm and anticoagulant treatment.
Dreijer, Albert R; Kruip, Marieke J H A; Diepstraten, Jeroen; Polinder, Suzanne; Brouwer, Rolf; Leebeek, Frank W G; Vulto, Arnold G; van den Bemt, Patricia M L A
Introduction Antithrombotic therapy carries high risks for patient safety. Antithrombotics belong to the top 5 medications involved in potentially preventable hospital admissions related to medication. To provide a standard for antithrombotic therapy and stress the importance of providing optimal care to patients on antithrombotic therapy, the Landelijke Standaard Ketenzorg Antistolling (LSKA; Dutch guideline on integrated antithrombotic care) was drafted. However, the mere publication of this guideline does not guarantee its implementation. This may require a multidisciplinary team effort. Therefore, we designed a study aiming to determine the influence of hospital-based antithrombotic stewardship on the effect and safety of antithrombotic therapy outcomes during and after hospitalisation. Methods and analysis In this study, the effect of the implementation of a multidisciplinary antithrombotic team is compared with usual care using a pre-post study design. The study is performed at the Erasmus University Medical Center Rotterdam and the Reinier de Graaf Hospital Delft. Patients who are or will be treated with antithrombotics are included in the study. We aim to include 1900 patients, 950 in each hospital. Primary outcome is the proportion of patients with a composite end point consisting of ≥1 bleeding or ≥1 thrombotic event from the beginning of antithrombotic therapy (or hospitalisation) until 3 months after hospitalisation. Bleeding is defined according to the International Society of Thrombosis and Haemostasis (ISTH) classification. A thrombotic event is defined as any objectively confirmed arterial or venous thrombosis, including acute myocardial infarction or stroke for arterial thrombosis and deep venous thrombosis or pulmonary embolism or venous thrombosis. An economic evaluation is performed to determine whether the implementation of the multidisciplinary antithrombotic team will be cost-effective. Ethics and dissemination This protocol was
Musgrave, K M; Powell, J
There is limited guidance available to clinicians regarding the management of antithrombotic therapy during epistaxis, whilst there has been an increase in the use of anticoagulation and antiplatelet therapy. In addition, the introduction of direct oral anticoagulants (DOACs), such as dabigatran and rivaroxaban, over the last decade has significantly increased the complexity of managing the anticoagulated epistaxis patient. We undertook a systemic literature review investigating potential management strategies for each class of anti-thrombotic therapy during epistaxis. A PubMED and Cochrane Library search was performed on 10/03/16 using, but not limited to, the search terms epistaxis, nosebleed, nose bleeding, nasal haemorrhage, nasal bleeding AND each of the following search terms: antithrombotic, anticoagulant, antiplatelet, aspirin, clopidogrel, warfarin, dabigatran, rivaroxaban, apixaban and tranexamic acid. This yielded 3815 results, of which 29 were considered relevant. Other sources such as national and international guidelines related to the management of anti-thrombotics were also utilised. We present the findings related to the management of each class of anti-thrombotic therapy during epistaxis. Overall we found a lack of evidence regarding this topic and further high quality research is needed. This is an area growing in complexity and the support of colleagues in Haematology and Cardiology is increasingly important.
Chackartchi, T; Sachar Helft, S; Findler, M
Surgical intra-oral treatment for patients under antithrombotic therapy presents a challenge for the dental team. Within the last few years evidence based systematic reviews established new clinical guidelines for wide groups of patients which need to use antithrombotic treatment. The expected increase in use of antithrombotic treatment forced the pharmaceutical industry to provide new treatments. The former anticoagulant and anti-platelets aggregation groups of drugs were limited to small variety of medication. The search for the new treatments with ideal properties led to newly invented groups of drugs. In this article we will describe the new advancements in anti-thrombotic treatments. The article will summarize the limited knowledge of surgical management of patients under the new anti-thrombotic medications and the recommended approach for oral surgical procedures.
Seip, Richard L; Duconge, Jorge; Ruaño, Gualberto
Genotyping has the potential to improve the efficacy and safety of major antithrombotic drugs. For warfarin, the stable maintenance dose varies from 1-10 mg/day. The VKORC1 -1639G>A allele and the CYP2C9*2 and *3 alleles (cumulative frequency: 90% in Asians, 65% in Europeans and 20% in Africans), explain 45% of response variability in European and 30% in African populations. The large clinical trials COAG and EU-PACT will define the extent to which pharmacogenetic dosing affects the safety and efficacy of warfarin and coumarin derivatives. The platelet inhibitor clopidogrel requires activation by the CYP2C19 enzyme. CYP2C19*2 and *3 alleles (cumulative frequency: 20-50%) produce null enzyme activity, and their presence attenuates platelet inhibition and increases cardiovascular events. The US FDA-mandated drug labeling recognizes the relevance of genotyping in the selection and dosing of both warfarin and clopidogrel.
Zacà, Valerio; Marcucci, Rossella; Parodi, Guido; Limbruno, Ugo; Notarstefano, Pasquale; Pieragnoli, Paolo; Di Cori, Andrea; Bongiorni, Maria Grazia; Casolo, Giancarlo
The aim of this review is to formulate practical recommendations for the management of antithrombotic therapy in patients undergoing cardiac implantable electronic device (CIED) surgery by providing indications for a systematic approach to the problem integrating general technical considerations with patient-specific elements based on a careful evaluation of the balance between haemorrhagic and thromboembolic risk. Hundreds of thousands patients undergo implantation or replacement of CIEDs annually in Europe, and up to 50% of these subjects receive antiplatelet agents or oral anticoagulants. The rate of CIED-related complications, mainly infective, has also significantly increased so that transvenous lead extraction procedures are, consequently, often required. Cardiac implantable electronic device surgery is peculiar and portends specific intrinsic risks of developing potentially fatal haemorrhagic complications; on the other hand, the periprocedural suspension of antithrombotic therapy in patients with high thromboembolic risk cardiac conditions may have catastrophic consequences. Accordingly, the management of the candidate to CIED surgery receiving concomitant antithrombotic therapy is a topic of great clinical relevance yet controversial and only partially, if at all, adequately addressed in evidence-based current guidelines. In spite of the fact that in many procedures it seems reasonably safe to proceed with aspirin only or without interruption of anticoagulants, restricting to selected cases the use of bridging therapy with parenteral heparins, there are lots of variables that may make the therapeutic choices challenging. The decision-making process applied in this document relies on the development of a stratification of the procedural haemorrhagic risk and of the risk deriving from the suspension of antiplatelet or anticoagulant therapy combined to generate different clinical scenarios with specific indications for optimal management of periprocedural
Seip, Richard L; Duconge, Jorge; Ruaño, Gualberto
Genotyping has the potential to improve the efficacy and safety of major antithrombotic drugs. For warfarin, the stable maintenance dose varies from 1–10 mg/day. The VKORC1 −1639G>A allele and the CYP2C9*2 and *3 alleles (cumulative frequency: 90% in Asians, 65% in Europeans and 20% in Africans), explain 45% of response variability in European and 30% in African populations. The large clinical trials COAG and EU-PACT will define the extent to which pharmacogenetic dosing affects the safety and efficacy of warfarin and coumarin derivatives. The platelet inhibitor clopidogrel requires activation by the CYP2C19 enzyme. CYP2C19*2 and *3 alleles (cumulative frequency: 20–50%) produce null enzyme activity, and their presence attenuates platelet inhibition and increases cardiovascular events. The US FDA-mandated drug labeling recognizes the relevance of genotyping in the selection and dosing of both warfarin and clopidogrel. PMID:20462345
Widimský, P.; Kočka, V.; Roháč, F.; Osmančík, P.
Percutaneous catheter-based interventions became a critically important part of treatment in modern cardiology, improving quality of life as well as saving many life. Due to the introduction of foreign materials to the circulation (either temporarily or permanently) and due to a certain damage to the endothelium or endocardium, the risk of thrombotic complications is substantial and thus some degree of antithrombotic therapy is needed during all these procedures. The intensity (dosage, combination, and duration) of periprocedureal antithrombotic treatment largely varies based on the type of procedure, clinical setting, and comorbidities. This manuscript summarizes the current therapeutic approach to prevent clotting (and bleeding) during a large spectrum of interventions: acute and elective coronary interventions, acute stroke interventions and elective carotid stenting, electrophysiology procedures, interventions for structural heart disease, and peripheral arterial interventions. PMID:27418971
Chan, Wee-Shian; Rey, Evelyne; Kent, Nancy E; Chan, Wee-Shian; Kent, Nancy E; Rey, Evelyne; Corbett, Thomas; David, Michèle; Douglas, M Joanne; Gibson, Paul S; Magee, Laura; Rodger, Marc; Smith, Reginald E
Objectif : Présenter une approche, fondée sur les données actuelles, envers le diagnostic, la prise en charge et la thromboprophylaxie de la thromboembolie veineuse pendant la grossesse et la période postpartum. Résultats : La littérature publiée a été récupérée par l’intermédiaire de recherches menées dans PubMed, Medline, CINAHL et The Cochrane Library entre novembre 2011 et juillet 2013 au moyen d’un vocabulaire contrôlé (p. ex. « pregnancy », « venous thromboembolism », « deep vein thrombosis », « pulmonary embolism », « pulmonary thrombosis ») et de mots clés (p. ex. « maternal morbidity », « pregnancy complications », « thromboprophylaxis », « antithrombotic therapy ») appropriés. Les résultats ont été restreints aux analyses systématiques, aux essais comparatifs randomisés / essais cliniques comparatifs et aux études observationnelles publiés en anglais ou en français. Aucune restriction n’a été imposée en matière de dates. La littérature grise (non publiée) a été identifiée par l’intermédiaire de recherches menées dans les sites Web d’organismes s’intéressant à l’évaluation des technologies dans le domaine de la santé et d’organismes connexes, dans des collections de directives cliniques, dans des registres d’essais cliniques et auprès de sociétés de spécialité médicale nationales et internationales. Valeurs : La qualité des résultats est évaluée au moyen des critères décrits dans le rapport du Groupe d’étude canadien sur les soins de santé préventifs (Tableau). Recommandations 1. La tenue d’un examen objectif s’avère requise lorsque la présence d’une thrombose veineuse profonde ou d’une embolie pulmonaire est soupçonnée sur le plan clinique. (II-2A) 2. Pour diagnostiquer la présence d’une thrombose veineuse profonde, il est recommandé d’avoir recours à une échographie; lorsque l’examen initial donne des résultats n
Roudaut, R; Lorient-Roudaut, M F
Mechanical valvular prostheses have the advantage of longevity but carry a risk of thrombosis which is itself dependent on many haemodynamic, haemostatic and parietal factors. Antithrombotic therapy in patients with mechanical valvular prostheses is based on vitamin-K antagonists, the optimal dosage of which should reflect the type and location of the prosthesis and the underlying pathology. The patient with a mechanical valvular prosthesis treated by oral anticoagulation must be fully informed and regularly followed up. Special situations: extracardiac surgery, dental extraction, gastrointestinal endoscopy, require specific, well established management.
Gailani, David; Bane, Charles E.; Gruber, Andras
Summary The most commonly used anticoagulants produce therapeutic antithrombotic effects either by inhibiting thrombin or factor Xa, or by lowering the plasma levels of the precursors of these key enzymes, prothrombin and factor X. These drugs do not distinguish between thrombin generation contributing to thrombosis from thrombin generation required for hemostasis. Thus, anticoagulants increase bleeding risk, and many patients who would benefit from therapy go untreated because of comorbidities that place them at unacceptable risk for hemorrhage. Studies in animals demonstrate that components of the plasma contact activation system contribute to experimentally-induced thrombosis, despite playing little or no role in hemostasis. Attention has focused on factor XII, the zymogen of a protease (factor XIIa) that initiates contact activation when blood is exposed to foreign surfaces; and factor XI, the zymogen of the protease factor XIa, which links contact activation to the thrombin generation mechanism. In the case of factor XI, epidemiologic data indicate this protein contributes to stroke and venous thromboembolism, and perhaps myocardial infarction, in humans. A phase 2 trial showing that reduction of factor XI may be more effective than low-molecular-weight heparin at preventing venous thrombosis during knee replacement surgery provides proof of concept for the premise that an antithrombotic effect can be uncoupled from an anticoagulant effect in humans by targeting components of contact activation. Here we review data on the role of factor XI and factor XII in thrombosis, and results of pre-clinical and human trials for therapies targeting these proteins. PMID:25976012
Gailani, D; Bane, C E; Gruber, A
The most commonly used anticoagulants produce therapeutic antithrombotic effects either by inhibiting thrombin or factor Xa (FXa) or by lowering the plasma levels of the precursors of these key enzymes, prothrombin and FX. These drugs do not distinguish between thrombin generation contributing to thrombosis from thrombin generation required for hemostasis. Thus, anticoagulants increase bleeding risk, and many patients who would benefit from therapy go untreated because of comorbidities that place them at unacceptable risk for hemorrhage. Studies in animals demonstrate that components of the plasma contact activation system contribute to experimentally induced thrombosis, despite playing little or no role in hemostasis. Attention has focused on FXII, the zymogen of a protease (FXIIa) that initiates contact activation when blood is exposed to foreign surfaces, and FXI, the zymogen of the protease FXIa, which links contact activation to the thrombin generation mechanism. In the case of FXI, epidemiologic data indicate this protein contributes to stroke and venous thromboembolism, and perhaps myocardial infarction, in humans. A phase 2 trial showing that reduction of FXI may be more effective than low molecular weight heparin at preventing venous thrombosis during knee replacement surgery provides proof of concept for the premise that an antithrombotic effect can be uncoupled from an anticoagulant effect in humans by targeting components of contact activation. Here, we review data on the role of FXI and FXII in thrombosis and results of preclinical and human trials for therapies targeting these proteins.
A tendency toward bleeding often undercuts the beneficial preventive effect of higher doses of a single antithrombotic drug or combined antithrombotic therapy. Although high doses of antithrombotic drugs may be necessary for optimal prevention, such therapy can also elicit more frequent bleeding. Although major bleeding could be a reversible event is likely to lead clinicians to discontinue antithrombotic therapy which in turn could increase the risk of myocardial infarction, stroke, and cardiovascular death. Thus, to prevent thrombotic events without frequent bleeding complications, the preferred approach might be to use anti-inflammatory drugs in addition to the first-line antithrombotic drugs to reduce inflammation and thrombin formation in atheroma. Although some preliminary data have been already published, to confirm the potential benefit of anti-inflammatory drugs in acute coronary syndromes large prospective double-bind randomized trials are necessary. PMID:17727726
Opinion statement Atrial fibrillation (AF) is the most common cardiac arrhythmia in the elderly, affecting 1 in 20 adults over the age of 70 years. Stroke is a major yet highly preventable complication of AF, and the strokes related to AF often are disabling and fatal. Warfarin is the treatment of choice in high-risk patients with AF, and its superior efficacy over aspirin for preventing stroke in these patients is widely recognized. However, several eligible patients with AF are not being treated with warfarin or are being treated inadequately, largely because of concerns regarding the attendant strict monitoring, drug interactions, and risk of major bleeding. As such, alternative antithrombotic therapies that can rival or exceed the efficacy of warfarin, yet compare favorably with its administration and side effect profile, are being sought. One such strategy, the use of a combination antiplatelet regimen, for stroke prevention in high-risk patients with nonvalvular AF was investigated recently in two clinical trials. This article reviews the role of combination antiplatelet regimens in stroke prevention for patients with AF. Other therapies discussed include oral anticoagulation, single antiplatelet therapies, oral anticoagulation plus antiplatelet treatment, direct thrombin inhibitors, and factor Xa inhibitors. PMID:20461116
Yoshio, Toshiyuki; Nishida, Tsutomu; Hayashi, Yoshito; Iijima, Hideki; Tsujii, Masahiko; Fujisaki, Junko; Takehara, Tetsuo
Endoscopic submucosal dissection (ESD) is minimally invasive and thus has become a widely accepted treatment for gastric neoplasms, particularly for patients with comorbidities. Antithrombotic agents are used to prevent thrombotic events in patients with comorbidities such as cardio-cerebrovascular diseases and atrial fibrillation. With appropriate cessation, antithrombotic therapy does not increase delayed bleeding in low thrombosis-risk patients. However, high thrombosis-risk patients are often treated with combination therapy with antithrombotic agents and occasionally require the continuation of antithrombotic agents or heparin bridge therapy (HBT) in the perioperative period. Dual antiplatelet therapy (DAPT), a representative combination therapy, is frequently used after placement of drug-eluting stents and has a high risk of delayed bleeding. In patients receiving DAPT, gastric ESD may be postponed until DAPT is no longer required. HBT is often required for patients treated with anticoagulants and has an extremely high bleeding risk. The continuous use of warfarin or direct oral anticoagulants may be possible alternatives. Here, we show that some antithrombotic therapies in high thrombosis-risk patients increase delayed bleeding after gastric ESD, whereas most antithrombotic therapies do not. The management of high thrombosis-risk patients is crucial for improved outcomes. PMID:28042389
Yun, Jong Hyuk; Jung, Hae Il; Lee, Hyoung Uk; Baek, Moo-Jun
Purpose Laparoscopic cholecystectomy (LC) is one of the most commonly performed surgeries in the world today. However, there is no consensus regarding whether LC can be performed in patients with acute cholecystitis while on antithrombotic therapy. The objective of our study was to describe postoperative outcomes of patients who underwent emergent LC without interruption to antithrombotic therapy. Methods We performed a retrospective review of patients who underwent LC for acute cholecystitis while on antithrombotic therapy from 2010 to 2015 at Soonchunhyang Universtiy Cheonan Hospital. Patients were divided into 2 groups as underwent emergent LC and elective LC. Results A total of 67 patients (emergent group, 22; elective group, 45) were included in the analysis. Elective group had significantly longer duration between the admission and operation (8 [7–10] days vs. 2 [1–3] days, P < 0.001) and longer duration of antithrombotic drugs discontinuation (7 days vs. 1 [0–3] days, P < 0.001). Emergent group had significantly more postoperative anemia (6 patients vs. 0 patient, P = 0.001) and 3 of 6 patients received packed RBC transfusion in postoperative period. However, there was no significant difference in length of postoperative stays, length of intensive care unit stays and mortality rates. Conclusion Emergent LC without interruption to antithrombotic therapy was relatively safe and useful. A well-designed multicenter study is needed to confirm the safety and efficacy of LC without suspension of antithrombotic therapy and to provide a simple guideline. PMID:28289668
Lopes, Antonio Augusto
In pulmonary hypertension (PH), thrombosis and thromboembolism may occur as primary events associated with inherited or acquired thrombophilia. Alternatively, in situ thrombosis may develop as a complication of pre-existing vasculopathy as in the case of idiopathic PH and related disorders (so called pulmonary arterial hypertension). In these disorders, a number of abnormalities has been described involving endothelial cells, platelets and other circulating cellular and soluble elements. These abnormalities are suggestive of a shift of pulmonary vascular microenvironment toward a procoagulant, prothrombotic and antifibrinolytic pattern. The abnormalities described so far include circulating antiphospholipid antibodies, increased plasma levels of platelet aggregating agents (serotonin, thromboxane), adhesion molecules (P-selectin, von Willebrand factor), antifibrinolytic enzymes (plasminogen activator inhibitor 1) and cytokines. Also, decreased endothelial production of natural anticoagulants (thrombomodulin) and platelet antiaggregating substances (nitric oxide, prostacyclin) have been demonstrated. The present review is focused on the procoagulant, prothrombotic and antifibrinolytic mechanisms so far identified in PH, in both clinical setting and animal models. Understanding of these mechanisms is crucial for a proper selection of anticoagulant and antithrombotic therapies and provides the rationale for development of novel therapeutic options.
Nuttall, Marc T; Rodgers, George M
Many patients with underlying cardiovascular disease require long-term anticoagulation. The perioperative or periprocedural management of patients who require temporary interruption of anticoagulant or antiplatelet medications is a common and often challenging clinical problem. It requires a fine balance between the risk of thromboembolic events during anticoagulant interruption and the risk of bleeding in the setting of antithrombotic therapy administered around the time of surgery. Interruption of anticoagulation is associated with an increased risk of thromboembolic events. Stratifying patients into thromboembolic risk groups may be helpful in directing anticoagulation management in the perioperative setting. Bridging anticoagulation, generally with low-molecular-weight heparin (LMWH), is often an integral part of perioperative thrombosis risk reduction. Perioperative anticoagulation management varies depending on the indication for anticoagulation and the anticoagulant or antiplatelet agent being used by the patient. In this article, we review some of the general principles involved with perioperative anticoagulation and discuss the perioperative management of patients taking vitamin K antagonists (VKAs), bridging regimens for anticoagulants and antiplatelet agents, and strategies for managing patients on the newer oral anticoagulants.
Gharacholou, S Michael; Lopes, Renato D; Washam, Jeffrey B; Newby, L Kristin; James, Stefan K; Alexander, John H
The use of anticoagulant and antiplatelet therapy during the management of acute coronary syndromes (ACS) has been associated with improvements in short- and long-term clinical outcomes, regardless of whether patients are managed conservatively or with acute coronary revascularization. Translating the existing evidence for selection of the most appropriate antithrombotic strategy has been summarized in available guideline recommendations. Given the breadth of antithrombotic recommendations across existing U.S. and European guidelines, synthesis of these recommendations for practicing clinicians who treat patients with ACS are increasingly desired. Providing a summary of the similarities across guidelines while noting the areas where divergence exists becomes an important facet in translating optimal antithrombotic management in ACS for the treating clinician. This review highlights the important aspects of clinical practice guidelines that practicing physicians should consider when selecting antithrombotic therapies to reduce ischemic risk while minimizing hemorrhagic risk across all ACS subtypes.
Bomgaars, Lisa R.; Massicotte, M. Patricia
Efficacious ventricular assist device (VAD) support in pediatric patients depends on successful antithrombotic management. The experience with antithrombotic management for the EXCOR Pediatric VAD Investigational Device Exemption (IDE) study is described. All 68 children in North America enrolled in the IDE study from May 9, 2007 to December 10, 2010 are included. The Edmonton Anticoagulation and Platelet Inhibition Protocol was provided for management guidance. Monitoring parameters, drug dosing, targeted serious adverse events, and pump changes were reviewed. Major bleeding occurred in 43% of all subjects with most events occurring within 14 days of implantation. Bleeding events were probably/definitely related in 24% to antithrombotic management. Neurologic events occurred in 28% of subjects and were probably/definitely related in 9% to antithrombotic therapy intensity. Most neurologic events occurred between 4 and 30 days postimplantation and sporadically thereafter. Pump change occurred in 56% of subjects. Use of an antithrombotic protocol for enrolled subjects was possible in this multicenter study. Incidence of significant bleeding and thromboembolic events was acceptable when balanced against life-saving benefits of VADs. Further studies are needed to optimize the antithrombotic management of this patient population. PMID:27556152
Linchak, R M; Kompaniets, O G; Nedbaĭkin, A M; Komkov, D S; Iusova, I A
We conducted an anonymous survey among 382 physicians (58% internists, 42% cardiologists) in order to obtain information on their opinion on various aspects of antithrombotic therapy in atrial fibrillation. The survey revealed low level of awareness about algorithms of stratification of risks of stroke, systemic embolism, and bleeding. Reported rates of clinical use of recommended antithrombotic agents were: warfarin--30, aspirin monotherapy--19, dabigatran--10, rivaroxaban--8, and combination of aspirin and clopidogrel--8%. Rate of use of drugs without sufficient evidence base in AF was 25%. When asked to designate antithrombotic drug of choice 85% of physicians indicated warfarin and 12%--novel anticoagulants (NOAC). The following factors were considered as limiting wide application of NOAC: high cost (59%), lack of data on these drugs (14%), and impossibility to control safety of their administration (9%).
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Park, Yongwhi; Franchi, Francesco; Rollini, Fabiana; Angiolillo, Dominick J
Diabetes mellitus (DM) is a key risk factor for recurrent atherothrombotic events in patients with acute coronary syndrome (ACS) and in those undergoing percutaneous coronary intervention (PCI). The prothrombotic milieu that characterizes patients with DM underscores the importance of oral antithrombotic therapy for secondary prevention of recurrent events in these patients. Indeed, dual antiplatelet therapy (DAPT) with aspirin and the P2Y12inhibitor clopidogrel, which has represented the mainstay of treatment for many years, has significantly reduced the incidence of recurrent atherothrombotic events. However, recurrence rates in DM patients still remain high despite this treatment regimen, which may be partly related to inadequate platelet inhibition induced by standard DAPT with aspirin and clopidogrel. This underpins the need for more potent antithrombotic treatment regimens for secondary prevention of atherothrombotic events in DM patients following ACS or PCI. The development of antiplatelet therapies associated with more potent oral platelet P2Y12receptor inhibition, including prasugrel and ticagrelor, as well as platelet inhibitors blocking alternative pathways, such as thrombin-mediated platelet inhibition with vorapaxar, may represent potential treatment options in DM patients. Moreover, with the introduction of the target-specific oral anticoagulants, there has been a reappraisal of the use of anticoagulation in addition to antiplatelet therapy for secondary prevention in patients with ACS. This review provides an update on the recent advances and limitations of oral antithrombotic agents used for secondary prevention in DM patients following ACS or PCI.
Fakhri, Hamid R.; Janket, Sok J.; Baird, Alison E.; Dinnocenzo, Richard; Meurman, Jukka H.
Objectives: Recent developments of new direct oral anticoagulants that target specific clotting factors necessitate understanding of coagulation biology. The objective of this tutorial is to offer dental professionals a review of coagulation mechanisms and the pharmacodynamics of the conventional and new oral anticoagulants. Also, we summarized the dental implications of the conventional and new anticoagulants. Method: We searched Medline using search terms “antithrombotic”, “antihemostasis” or “anticoagulation” and combined them with the search results of “dental”, “oral surgery” or “periodontal”. We restricted the results to “human” and “English”. Results: The early coagulation cascade, the new cell-based coagulation model, the pharmacokinetics and pharmacodynamics of conventional antithrombotics, and new oral anticoagulants were reviewed. The new direct factor Xa inhibitors and the direct thrombin inhibitor (s), called direct oral anticoagulants (DOAs) have rapid onset of action, fast elimination on cessation, and fewer drug-drug or drug-food interactions than warfarin. However, the lack of antidotes raises concerns that some dental procedures may trigger serious hemorrhagic events. Additionally, careful perioperative withdrawal and resumption protocols for the DOAs are reviewed, because DOAs’ blood levels are dependent on renal function. Also, various reversal strategies in the event of excessive bleedings are summarized. Perioperative management of dental patients taking new DOAs and conventional oral anticoagulants are also discussed. However, the perioperative strategies for DOAs are yet to be validated in randomized trials. Key words:Coagulation cascade, cell-based coagulation model, factor Xa inhibitors, direct thrombin inhibitors, prothrombin complex concentrates. PMID:23524440
Bishop, Conrad V.; Liddell, Heath; Ischia, Joseph; Paul, Eldho; Appu, Sree; Frydenberg, Mark; Pham, Trung
Objective To compare the immediate postoperative outcomes of patients with benign prostatic hyperplasia undergoing Holmium laser enucleation of the prostate (HOLEP) with and without full anticoagulation or antiplatelet therapy at the time of surgery. Materials and Methods A retrospective review was performed on a series of consecutive patients undergoing HOLEP at our institution by a single surgeon from February 2004 to September 2010. Demographic, surgical, pathological and outcome data were collected. Two cohorts were identified on the basis of antithrombotic therapy at the time of surgery. Patients who continued on aspirin, aspirin/dipyridamole, clopidogrel and warfarin throughout the surgery were included in the antithrombotic cohort. Univariate analysis was performed to determine differences in outcomes between the 2 cohorts. Results Total 125 consecutive patients underwent HOLEP with 52 patients on antithrombotic therapy at the time of surgery and 73 patients were not on antithrombotic therapy during surgery. Patients in the antithrombotic group were older (75.1 ±7.5 vs. 71.7 ± 8.3 years; p = 0.02) and had a higher median ASA physical status (3 (3-3) vs. 2 (2-3), p < 0.0001). The mean operating time and median specimen volume were not significantly different between the 2 cohorts. The median length of stay (2 (1-3) vs. 1 (1-2) d, p = 0.014) was longer in the antithrombotic cohort. The transfusion rate (7.7 vs. 0%, p = 0.028) was predictably higher in the antithrombotic cohort. No patients required re-operation for bleeding. Conclusions The use of HOLEP in patients on antithrombotic therapy is safe despite the higher surgical risk profile of that particular patient population and the potential increased risk for significant bleeding. PMID:24917753
Powless, R Andrew; Omar, Hesham R; Mangar, Devanand; Camporesi, Enrico M
The management of antiplatelet and anticoagulant therapy before full-mouth extraction is a major concern for dentists. Approach should vary depending on the risk of bleeding and adverse cardiac events. We have adapted a more conservative approach with continuation of antiplatelet therapy in the majority of patients while implementing local hemostatic measures with good outcomes. Specific recommendations are provided for antiplatelet therapy before mouth extraction.
Diego, Miguel A.; Field, Tiffany; Hernandez-Reif, Maria; Shaw, Jon A.; Rothe, Eugenio M.; Castellanos, Daniel; Mesner, Linda
Seventeen aggressive adolescents were assigned to a massage therapy group or a relaxation therapy group to receive 20-minute therapy sessions, twice a week for five weeks. The massaged adolescents had lower anxiety after the first and last sessions. By the end of the study, they also reported feeling less hostile and they were perceived by their…
Cheng, Kuo-Wei; Shih, Hsin-Chin; How, Chorng-Kuang; Lin, Yang-Ying; Hung-Tsang Yen, David; Huang, Mu-Shun
Cardiac dysfunction is common in patients with severe sepsis and septic shock. We present a 71-year-old woman with Escherichia coli urosepsis and sepsis-induced myocardial injury masquerading as non-ST elevated myocardial ischemia. Spontaneous psoas hematoma requiring blood transfusion and intracranial hemorrhage developed after antiplatelet and anticoagulant therapies, even in therapeutic doses. The patient was managed conservatively and recovered well with minor residual hemiparesis. Bleeding complications are a common risk of antithrombotic therapy. It is therefore crucial to weigh the impact of efficacy against safety. Old age, female gender, renal insufficiency and sepsis character increased the risk of bleeding in this patient. A misinterpretation of elevated cardiac troponin I may give rise to a diagnostic dilemma and cause unnecessary morbidity.
Becker, Richard C; Oney, Sabah; Becker, Kristian C D; Sullenger, Bruce
Thrombotic disorders and their common clinical phenotypes of acute myocardial infarction, ischemic stroke, and venous thromboembolism are the proximate cause of substantial morbidity, mortality, and health care expenditures worldwide. Accordingly, therapies designed to attenuate thrombus initiation and propagation, reflecting integrated platelet-mediated and coagulation protease-mediated events, respectively, represent a standard of care. Unfortunately, there are numerous inherent limitations of existing therapies that include target nonselectivity, variable onset and offset of pharmacodynamic effects, a narrow efficacy-safety profile, and the absence of a safe and reliable platform for either accurate titration, based on existing patient-specific, disease-specific, and clinical conditions, or active reversibility. Herein, we summarize our experience with oligonucleotide antithrombotic agents and their complementary antidotes, targeting the platelet adhesive protein von Willebrand factor and the pivotal coagulation protease factor IXa.
Norris, Susan L.; Schulman, Sam; Hirsh, Jack; Eckman, Mark H.; Akl, Elie A.; Crowther, Mark; Vandvik, Per Olav; Eikelboom, John W.; McDonagh, Marian S.; Lewis, Sandra Zelman; Gutterman, David D.; Cook, Deborah J.; Schünemann, Holger J.
Background: To develop the Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: ACCP Evidence-Based Clinical Practice Guidelines (AT9), the American College of Chest Physicians (ACCP) assembled a panel of clinical experts, information scientists, decision scientists, and systematic review and guideline methodologists. Methods: Clinical areas were designated as articles, and a methodologist without important intellectual or financial conflicts of interest led a panel for each article. Only panel members without significant conflicts of interest participated in making recommendations. Panelists specified the population, intervention and alternative, and outcomes for each clinical question and defined criteria for eligible studies. Panelists and an independent evidence-based practice center executed systematic searches for relevant studies and evaluated the evidence, and where resources and evidence permitted, they created standardized tables that present the quality of the evidence and key results in a transparent fashion. Results: One or more recommendations relate to each specific clinical question, and each recommendation is clearly linked to the underlying body of evidence. Judgments regarding the quality of evidence and strength of recommendations were based on approaches developed by the Grades of Recommendations, Assessment, Development, and Evaluation Working Group. Panel members constructed scenarios describing relevant health states and rated the disutility associated with these states based on an additional systematic review of evidence regarding patient values and preferences for antithrombotic therapy. These ratings guided value and preference decisions underlying the recommendations. Each topic panel identified questions in which resource allocation issues were particularly important and, for these issues, experts in economic analysis provided additional searches and guidance. Conclusions: AT9 methodology reflects the current science of evidence
Kim, Nam Ho; Nam, Gi Byung; Park, Hyung Wook; On, Young Keun; Lee, Young Soo; Lim, Hong Euy; Joung, Boyoung; Cha, Tae Joon; Hwang, Gyo Seung; Oh, Seil; Kim, June Soo
In patients with nonvalvular atrial fibrillation (AF), the risk of stroke varies considerably according to individual clinical status. The CHA2DS2-VASc score is better than the CHADS2 score for identifying truly lower risk patients with AF. With the advent of novel oral anticoagulants (NOACs), the strategy for antithrombotic therapy has undergone significant changes due to its superior efficacy, safety and convenience compared with warfarin. Furthermore, new aspects of antithrombotic therapy and risk assessment of stroke have been revealed: the efficacy of stroke prevention with aspirin is weak, while the risk of major bleeding is not significantly different from that of oral anticoagulant (OAC) therapy, especially in the elderly. Reflecting these pivotal aspects, previous guidelines have been updated in recent years by overseas societies and associations. The Korean Heart Rhythm Society has summarized the new evidence and updated recommendations for stroke prevention of patients with nonvalvular AF. First of all, antithrombotic therapy must be considered carefully and incorporate the clinical characteristics and circumstances of each individual patient, especially with regards to balancing the benefits of stroke prevention with the risk of bleeding, recommending the CHA2DS2-VASc score rather than the CHADS2 score for assessing the risk of stroke, and employing the HAS-BLED score to validate bleeding risk. In patients with truly low risk (lone AF, CHA2DS2-VASc score of 0), no antithrombotic therapy is recommended, whereas OAC therapy, including warfarin (international normalized ratio 2-3) or NOACs, is recommended for patients with a CHA2DS2-VASc score ≥2 unless contraindicated. In patients with a CHA2DS2-VASc score of 1, OAC therapy should be preferentially considered, but depending on bleeding risk or patient preferences, antiplatelet therapy or no therapy could be permitted. PMID:25653698
Cannon, Chris; Ezekowitz, Michael D; Granger, Christopher
Approximately 15% to 25% or 75,000 ischemic strokes are attributed to atrial fibrillation annually within the United States. Atrial fibrillation is the most frequently diagnosed cardiac arrhythmia and affects more than 2.66 million Americans. Moreover, atrial fibrillation is associated with a 1.5 to 1.9-fold higher risk of death due to its strong correlation with thromboembolic events. Because of the attributed increased morbidity and mortality, challenges that concern identification of patients at risk for thromboembolic events from atrial fibrillation must be addressed. These challenges include compliance to performance measures, adherence to guidelines, adequate prevention and early control of co-morbidities that affect the progression of atrial fibrillation and associated risks, early initiation of treatment, and successful evaluation of associated risks of bleeding, primary or recurrent stroke, and patient awareness and compliance. This multimedia educational webcast will discuss the state of affairs with respect to antithrombotic therapies and new anticoagulants. The webcast will also review factors influencing physician use of anticoagulation in atrial fibrillation. Clinical decision making and lessons learned from the expert faculty is also included.
Sandercock, P A; van den Belt, A G; Lindley, R I; Slattery, J
A formal statistical overview of all truly randomised trials was undertaken to determine whether antithrombotic therapy is effective and safe in the early treatment of patients with acute stroke. There were 15 completed randomised controlled trials of the value of early antithrombotic treatment in patients with acute stroke. The regimes tested in acute presumed or confirmed ischaemic stroke were: heparin, 10 trials with 1047 patients: oral anticoagulants, one trial with 51 patients: antiplatelet therapy, three trials with 103 patients. Heparin was tested in one trial with 46 patients with acute haemorrhagic stroke. Outcome measures were deep venous thrombosis (confirmed by I125 scanning or venography), pulmonary embolism, death from all causes, haemorrhagic transformation of cerebral infarction, level of disability in survivors. In patients with acute ischaemic stroke, allocation to heparin was associated with a highly significant 81% (SD 8, 2p < 0.00001) reduction in deep venous thrombosis detected by I125 fibrinogen scanning or venogram. Only three trials systematically identified pulmonary emboli, which occurred in 6/106 (5.7%) allocated control vs 3/132 (2.3%) allocated heparin, a non-significant 58% reduction (SD 45.7, 2p > 0.1). There were relatively few deaths in the trials in patients with presumed ischaemic stroke: 94/485 (19.4%) among patients allocated to the control group vs 79/497 (15.9%) among patients who were allocated heparin. The observed 18% (SD 16) reduction in the odds of death was not statistically significant. The least biased estimated of the effect of treatment on haemorrhagic transformation of the cerebral infarct (HTI) comes from trials where all patients were scanned at the end of treatment, irrespective of clinical deterioration; using this analysis, haemorrhagic transformation occurred in 7/102 (6.9%) control vs 8/106 (7.5%) treated, a non-significant 12% increase (SD 56, 2p > 0.1). These data cannot exclude the possibility that
Abraham, Neena S; Naik, Aanand D; Street, Richard L; Castillo, Diana L; Deswal, Anita; Richardson, Peter A; Hartman, Christine M; Shelton, George; Fraenkel, Liana
Purpose For years, older patients have been prescribed multiple blood-thinning medications (complex antithrombotic therapy [CAT]) to decrease their risk of cardiovascular events. These therapies, however, increase risk of adverse bleeding events. We assessed patient-reported trade-offs between cardioprotective benefit, gastrointestinal bleeding risk, and burden of self-management using adaptive conjoint analysis (ACA). As ACA could be a clinically useful tool to obtain patient preferences and guide future patient-centered care, we examined the clinical application of ACA to obtain patient preferences and the impact of ACA on medication adherence. Patients and methods An electronic ACA survey led 201 respondents through medication risk–benefit trade-offs, revealing patients’ preferences for the CAT risk/benefit profile they valued most. The post-ACA prescription regimen was categorized as concordant or discordant with elicited preferences. Adherence was measured using VA pharmacy refill data to measure persistence of use prior to and 1 year following preference-elicitation. Additionally, we analyzed qualitative interviews of 56 respondents regarding their perception of the ACA and the preference elicitation experience. Results Participants prioritized 5-year cardiovascular benefit over preventing adverse events. Medication side effects, medication-associated activity restrictions, and regimen complexity were less important than bleeding risk and cardioprotective benefit. One year after the ACA survey, a 15% increase in adherence was observed in patients prescribed a preference-concordant CAT strategy. An increase of only 6% was noted in patients prescribed a preference-discordant strategy. Qualitative interviews showed that the ACA exercise contributed to increase inpatient activation, patient awareness of preferences, and patient engagement with clinicians about treatment decisions. Conclusion By working through trade-offs, patients actively clarified their
Deedwania, Prakash C; Huang, Grace W
Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia and is an independent risk factor of potentially catastrophic cardioembolic strokes. AF patients are categorized into high-, intermediate-, and low-risk for thromboembolic complications using the CHADS(2) or CHA(2)DS(2)-VASc scoring system. Oral anticoagulation using warfarin has been the standard therapy for stroke prevention in intermediate- to high-risk AF patients. However, warfarin use has been limited by several factors such as narrow therapeutic windows, drug-drug and drug-food interactions, and hemorrhagic complications. Rigorous research evaluated dual antiplatelet therapy of clopidogrel and aspirin (acetylsalicylic acid) as a potential alternative to warfarin in the ACTIVE W trial. Dual antiplatelet therapy of clopidogrel and aspirin was found to be inferior to warfarin in preventing stroke and systemic embolism with increased bleeding risk. Other extensive research has led to the development of new antithrombotic agents. Recently, dabigatran etexilate 150 mg twice daily, a direct thrombin inhibitor, was approved by the US FDA for stroke prevention in patients with non-valvular AF after it was found to be superior to warfarin in preventing thromboembolic events and associated with less bleeding in the RE-LY trial. It was also cost effective when compared with warfarin. Dabigatran can be considered in high-risk AF patients who are unable or unwilling to comply with the frequent laboratory and clinic visits that are required when receiving treatment with warfarin. Factor Xa inhibitors are another class of new anticoagulants that have been developed. Oral rivaroxaban was non-inferior to warfarin in thromboprophylaxis and with similar bleeding in the ROCKET-AF trial (HR 0.88; p = 0.117). Apixaban, another factor Xa inhibitor, was superior to aspirin in reducing stroke and systemic embolism in patients with AF in the AVERROES trial (HR 0.45; p < 0.001). The results of the
Although previous studies demonstrated the risk of ischemic stroke (IS) in patients with head and neck cancer (HNC), the impact of oral antithrombotic therapy (OAT) on this risk has not yet been assessed. We aimed to evaluate the effectiveness and safety of OAT in patients with HNC treated with RT. This retrospective cohort study was performed using the National Health Insurance Research Database of Taiwan. A total of 37,638 patients diagnosed with HNC included in the study were classified as users and nonusers of OAT. Primary outcome was IS or transient ischemic attack (TIA), and secondary outcomes were death and major bleeding. The Cox proportional hazards model was used to calculate hazard ratios (HRs) and 95% confidence intervals (CIs). There was no significant difference in the risk of IS or TIA between patients on continuous OAT and nonusers (adjusted HR, 0.812; 95% CI, 0.199–3.309). The risk of major bleeding was not significantly different between the groups. From a national population database, we did not find an association between OAT and decreasing risk of ischemic stroke/TIA or increasing hazard of major bleeding. PMID:27990433
Cui, Guozhen; Shan, Luchen; Guo, Lin; Chu, Ivan Keung; Li, Guohui; Quan, Quan; Zhao, Yun; Chong, Cheong Meng; Zhang, Zaijun; Yu, Pei; Hoi, Maggie Pui Man; Sun, Yewei; Wang, Yuqiang; Lee, Simon MingYuen
Protein disulfide isomerase (PDI) family members including PDI and ERp57 emerge as novel targets for anti-thrombotic treatments, but chemical agents with selectivity remain to be explored. We previously reported a novel derivative of danshensu (DSS), known as ADTM, displayed strong cardioprotective effects against oxidative stress-induced cellular injury in vitro and acute myocardial infarct in vivo. Herein, using chemical proteomics approach, we identified ERp57 as a major target of ADTM. ADTM displayed potent inhibitory effects on the redox activity of ERp57, inhibited the adenosine diphosphate (ADP)-induced expressions of P-selectin and αIIbβ3 integrin, and disrupted the interaction between ERp57 and αIIbβ3. In addition, ADTM inhibited both arachidonic acid (AA)-induced and ADP-induced platelet aggregation in vitro. Furthermore, ADTM significantly inhibited rat platelet aggregation and thrombus formation in vivo. Taken together, ADTM represents a promising candidate for anti-thrombotic therapy targeting ERp57. PMID:26037049
Ferrari, Silvia Martina; Fallahi, Poupak; Politti, Ugo; Materazzi, Gabriele; Baldini, Enke; Ulisse, Salvatore; Miccoli, Paolo; Antonelli, Alessandro
Differentiated thyroid carcinomas (DTCs) that arise from follicular cells account >90% of thyroid cancer (TC) [papillary thyroid cancer (PTC) 90%, follicular thyroid cancer (FTC) 10%], while medullary thyroid cancer (MTC) accounts <5%. Complete total thyroidectomy is the treatment of choice for PTC, FTC, and MTC. Radioiodine is routinely recommended in high-risk patients and considered in intermediate risk DTC patients. DTC cancer cells, during tumor progression, may lose the iodide uptake ability, becoming resistant to radioiodine, with a significant worsening of the prognosis. The lack of specific and effective drugs for aggressive and metastatic DTC and MTC leads to additional efforts toward the development of new drugs. Several genetic alterations in different molecular pathways in TC have been shown in the past few decades, associated with TC development and progression. Rearranged during transfection (RET)/PTC gene rearrangements, RET mutations, BRAF mutations, RAS mutations, and vascular endothelial growth factor receptor 2 angiogenesis pathways are some of the known pathways determinant in the development of TC. Tyrosine kinase inhibitors (TKIs) are small organic compounds inhibiting tyrosine kinases auto-phosphorylation and activation, most of them are multikinase inhibitors. TKIs act on the aforementioned molecular pathways involved in growth, angiogenesis, local, and distant spread of TC. TKIs are emerging as new therapies of aggressive TC, including DTC, MTC, and anaplastic thyroid cancer, being capable of inducing clinical responses and stabilization of disease. Vandetanib and cabozantinib have been approved for the treatment of MTC, while sorafenib and lenvatinib for DTC refractory to radioiodine. These drugs prolong median progression-free survival, but until now no significant increase has been observed on overall survival; side effects are common. New efforts are made to find new more effective and safe compounds and to personalize the therapy in
Antithrombotic therapy use in patients with atrial fibrillation before the era of non-vitamin K antagonist oral anticoagulants: the Global Registry on Long-Term Oral Antithrombotic Treatment in Patients with Atrial Fibrillation (GLORIA-AF) Phase I cohort
Huisman, Menno V.; Ma, Chang Sheng; Diener, Hans-Christoph; Dubner, Sergio J.; Halperin, Jonathan L.; Rothman, Kenneth J.; Teutsch, Christine; Schoof, Nils; Kleine, Eva; Bartels, Dorothee B.; Lip, Gregory Y.H.
Aims The introduction of non-VKA oral anticoagulants (NOACs), which differ from the earlier vitamin K antagonist (VKA) treatments, has changed the approach to stroke prevention in atrial fibrillation (AF). GLORIA-AF is a prospective, global registry programme describing the selection of antithrombotic treatment in newly diagnosed AF patients at risk of stroke. It comprises three phases: Phase I, before the introduction of NOACs; Phase II, during the time of the introduction of dabigatran, the first NOAC; and Phase III, once NOACs have been established in clinical practice. Methods and results In Phase I, 1063 patients were eligible from the 1100 enrolled (54.3% male; median age 70 years); patients were from China (67.1%), Europe (EU; 27.4%), and the Middle East (ME; 5.6%). The majority of patients using VKAs had high stroke risk (CHA2DS2-VASc ≥ 2; 86.5%); 13.5% had moderate risk (CHA2DS2-VASc = 1). Vitamin K antagonist use was higher for persistent/permanent AF (47.7%) than that for paroxysmal (23.9%). Most patients in China were treated with antiplatelet agents (53.7%) vs. 27.1% in EU and 28.8% in ME. In China, 25.9% of patients had no antithrombotic therapy, vs. 8.6% in EU and 8.5% in ME. Conclusion Phase I of GLORIA-AF shows that VKAs were mostly used in patients with persistent/permanent (vs. paroxysmal) AF and in those with high stroke risk. Furthermore, there were meaningful geographical differences in the use of VKA therapy in the era before the availability of NOACs, including a much lower use of VKAs in China, where most patients either received antiplatelet agents or no antithrombotic treatment. PMID:27335063
Dual antiplatelet treatment with aspirin and clopidogrel is the antithrombotic treatment recommended after an acute coronary syndrome and/or coronary artery stenting. The evidence for optimal antiplatelet therapy for patients, in whom long-term treatment oral anticoagulation is mandatory, is however scarce. To evaluate the safety and efficacy of the various antithrombotic strategies adopted in this population, we reviewed the available evidence on the management of patients receiving oral anticoagulation, such as a vitamin-k-antagonists, referred for coronary artery stenting. Atrial fibrillation is the most frequent indication for oral anticoagulation. The need of starting antiplatelet therapy in this clinical scenario raises concerns about the combination to choose: triple therapy with warfarin, aspirin, and a thienopyridine being the most frequent and advised. The safety of this regimen appeared suboptimal because of an increased risk in hemorrhagic complications. On the other hand, the combination of oral anticoagulation and an antiplatelet agent is suboptimal in preventing thromboembolic events and stent thrombosis; dual antiplatelet therapy may be considered only when a high hemorrhagic risk and low thromboembolic risk are perceived. Indeed, the need for prolonged multiple-drug antithrombotic therapy increases the bleeding risks when drug eluting stents are used. Since current evidence derives mainly from small, single-center and retrospective studies, large-scale prospective multicenter studies are urgently needed. PMID:23075316
André, P; Bal dit Sollier, C; Bonneau, M; Pignaud, G; Hainaud, P; Azzam, K; Drouet, L
The use of models of experimental arterial thrombosis both in vivo and ex vivo in animals and ex vivo in humans is an obligatory step to the understanding of mechanisms involved in thrombogenesis as well as in the evaluation of anti-thrombotic therapeutics. Arterial thrombogenesis is a complex phenomenon which involves multiple systems, mechanisms and parameters. Therefore studies of thrombogenesis from a pathological as well as a therapeutic point are necessary for understanding this problem in its entirety. For these reasons, it is necessary to use models as representative as possible of the human pathological condition. Besides these theoretical requirements, practical needs have also to be fulfilled (accessibility of the models, adaptation to the type of the technique to different animal model and/or of the size of the animal to the amount of molecule available, cost ...) which necessary lead to some promises. In this review we have tried to underline the criteria for the choice, characteristics, advantages and disadvantages of the major models commonly accepted and used, in such a form that the reader who may not be an expert in the field would be led either to choose a particular model for a specific purpose or to appreciate a paper or a report based on an experimental model of arterial thrombosis. In vitro models of arterial thrombosis are so far removed from reality and due to their nature can generate so much artifacts thus we have omitted their discussion from this paper.
Lefkou, Eleftheria; Mamopoulos, Apostolos; Dagklis, Themistoklis; Vosnakis, Christos; Rousso, David
BACKGROUND. Administration of conventional antithrombotic treatment (low-dose aspirin plus low–molecular weight heparin [LDA+LMWH]) for obstetric antiphospholipid syndrome (APS) does not prevent life-threatening placenta insufficiency–associated complications such as preeclampsia (PE) and intrauterine growth restriction (IUGR) in 20% of patients. Statins have been linked to improved pregnancy outcomes in mouse models of PE and APS, possibly due to their protective effects on endothelium. Here, we investigated the use of pravastatin in LDA+LMWH-refractory APS in patients at an increased risk of adverse pregnancy outcomes. METHODS. We studied 21 pregnant women with APS who developed PE and/or IUGR during treatment with LDA+LMWH. A control group of 10 patients received only LDA+LMWH. Eleven patients received pravastatin (20 mg/d) in addition to LDA+LMWH at the onset of PE and/or IUGR. Uteroplacental blood hemodynamics, progression of PE features (hypertension and proteinuria), and fetal/neonatal outcomes were evaluated. RESULTS. In the control group, all deliveries occurred preterm and only 6 of 11 neonates survived. Of the 6 surviving neonates, 3 showed abnormal development. Patients who received both pravastatin and LDA+LMWH exhibited increased placental blood flow and improvements in PE features. These beneficial effects were observed as early as 10 days after pravastatin treatment onset. Pravastatin treatment combined with LDA+LMWH was also associated with live births that occurred close to full term in all patients. CONCLUSION. The present study suggests that pravastatin may improve pregnancy outcomes in women with refractory obstetric APS when taken at the onset of PE or IUGR until the end of pregnancy. PMID:27454295
Ansell, Jack; Hirsh, Jack; Poller, Leon; Bussey, Henry; Jacobson, Alan; Hylek, Elaine
This article concerning the pharmacokinetics and pharmacodynamics of vitamin K antagonists (VKAs) is part of the Seventh American College of Chest Physicians Conference on Antithrombotic and Thrombolytic Therapy: Evidence-Based Guidelines. The article describes the antithrombotic effect of VKAs, the monitoring of anticoagulation intensity, the clinical applications of VKA therapy, and the optimal therapeutic range of VKAs, and provides specific management recommendations. Grade 1 recommendations are strong, and indicate that the benefits do, or do not, outweigh the risks, burdens, and costs. Grade 2 suggests that individual patient's values may lead to different choices (for a full understanding of the grading see Guyatt et al, CHEST 2004; 126:179S-187S). Among the key recommendations in this article are the following: for dosing of VKAs, we suggest the initiation of oral anticoagulation therapy with doses between 5 and 10 mg for the first 1 or 2 days for most individuals, with subsequent dosing based on the international normalized ratio (INR) response (Grade 2B). In the elderly and in other patient subgroups with an elevated bleeding risk, we suggest a starting dose at < or = 5 mg (Grade 2C). We recommend basing subsequent doses after the initial two or three doses on the results of INR monitoring (Grade 1C). The article also includes several specific recommendations for the management of patients with INRs above the therapeutic range and for patients requiring invasive procedures. For example, in patients with mild to moderately elevated INRs without major bleeding, we suggest that when vitamin K is to be given it be administered orally rather than subcutaneously (Grade 1A). For the management of patients with a low risk of thromboembolism, we suggest stopping warfarin therapy approximately 4 days before they undergo surgery (Grade 2C). For patients with a high risk of thromboembolism, we suggest stopping warfarin therapy approximately 4 days before surgery, to
Kim, Wook-Joo; Park, Jong-Moo; Kang, Kyusik; Cho, Yong-Jin; Hong, Keun-Sik; Lee, Soo Joo; Ko, Youngchai; Lee, Kyung Bok; Park, Tai Hwan; Lee, Jun; Cha, Jae-Kwan; Kim, Dae-Hyun; Yu, Kyung-Ho; Lee, Byung-Chul; Oh, Mi-Sun; Lee, Juneyoung; Lee, JiSung; Jang, Myung Suk; Han, Moon-Ku
Background and Purpose A substantial proportion of patients with atrial fibrillation (AF) are not treated optimally; however, the inappropriateness of drug therapy has never been evaluated before or after a stroke event. We investigated the adherence to guidelines for therapy in AF patients hospitalized with acute ischemic stroke (AIS) before stroke onset and at discharge, with the aim of identifying the factors associated with inappropriate therapy. Methods AIS patients with AF hospitalized within 7 days of onset were identified from a prospective nine-center stroke registry database. Two cohorts were defined: patients diagnosed with AF prior to the stroke event (admission cohort) and patients diagnosed with AF at discharge from hospital (discharge cohort). Any of the following conditions were regarded as nonadherence to guidelines in this study: use of anticoagulant or nonuse of antithrombotics with CHADS2 score=0, nonuse of antithrombotics with CHADS2 score=1, or nonuse of anticoagulant with CHADS2 score ≥2. Results Overall, 406 patients were enrolled in the admission cohort and 518 in the discharge cohort. The rates of nonadherence before a stroke event and at discharge were 77.8% and 33.3%, respectively. These rates varied widely for both cohorts, with interhospital differences being statistically significant. Multivariable analysis revealed that old age, stroke history, and congestive heart failure were associated with nonadherence before stroke. At discharge, males, coronary heart disease, inappropriate antithrombotic use before stroke, and functional disability at discharge were associated with nonadherence. Conclusions This study shows that antithrombotic use in AIS patients with AF might be not optimal before and after stroke in Korea. PMID:26541495
Proietti, Marco; Mairesse, Georges H; Goethals, Peter; Scavee, Christophe; Vijgen, Johan; Blankoff, Ivan; Vandekerckhove, Yves; Lip, Gregory Yh
Background Cerebrovascular disease confers a major healthcare burden worldwide and is a major cause of death and disability. Several well-established risk factors, such as atrial fibrillation (AF), are associated with cerebrovascular disease and antithrombotic therapy reduces risk. Design This study was a subgroup analysis from the Belgian Heart Rhythm Week, a nationwide AF awareness programme. Methods We studied subjects screened between 2012 and 2014 with available data on clinical risk factors and antithrombotic treatment. Results Of the 38,034 subjects eligible for this analysis, 1513 (4.0%) reported a positive clinical history for cerebrovascular disease. Logistic regression analysis found that age, hypertension, diabetes mellitus, history of vascular disease, history of heart failure and history of AF (all p < 0.001) were independently associated with cerebrovascular disease. Among subjects with history of cerebrovascular disease and AF, 1.7% were taking oral anticoagulant drugs only, while both oral anticoagulant drugs and aspirin were used in 61.5% of subjects, aspirin in 4.3% of patients and no antithrombotic therapy in 32.5% of subjects. Among those subjects without AF, the corresponding figures were 0.8, 9.5, 2.0 and 87.6%, respectively. Conclusions The prevalence of cerebrovascular disease in this contemporary population screening project was higher than that reported in the general population and was associated with the major known stroke risk factors. Sub-optimal antithrombotic therapy management was evident, with a low use of oral anticoagulant drugs among patients with AF and a low use of aspirin among subjects without AF.
Stirbys Md PhD, Petras
In patients with atrial fibrillation antithrombotic prophylaxis for stroke is associated with an increased risk of bleeding. Cerebrovascular risk-benefit ratio for oral anticoagulation therapies continues to be debated. Macro and/or microhematomas as well as visible or cryptic ones may appear unexpectedly in any anatomic region. The diagnostic and prognostic value of subcutaneous hematomas (petechia, ecchymosis, bruise) potentially predisposing intracerebral micro- or macrobleeding might be reconsidered. Hypothetically, subcutaneous hemorrhagic events are "transparent" signs and reflect the coexistence of remote vulnerable sites that are potential bleeding sources. Obviously vigilance is needed for early signs of drug-related petechiae evaluation to determine whether it is a local/superficial subtlety or a systemic problem. Any bleeding complication, regardless of its scale and anatomical location, might be treated as a worrisome clinical symptom requiring subtle correction of antithrombotic regimen. The focus of this article is to review the current knowledge of drug-related hemorrhage with special emphasis on underlying mechanisms and links between the visible bleeding (predominantly subcutaneous) and remote (such as cerebral) hemorrhagic sources. To mitigate inappropriate therapy, we should consider new conceptual insights and more individualized approaches to achieve an optimal balance of efficacy and safety. We hypothesize that bleeding complications occur as a result of two factors - impact of antithrombotic drugs and related detrimental effect on microvascular network. Most likely the microvasculature undergoes pro-hemorrhagic medication stress leading to unfavorable vascular wall "fenestration" with ensuing consequences. If so, it suggests the presence of dual substrate responsible for hemorrhagic events.
Krasner, Andrew; Halperin, Jonathan L
Patients with atrial fibrillation who have risk factors for thromboembolism benefit from chronic oral anticoagulation therapy, and antiplatelet therapy alone is of relatively little benefit for prevention of ischemic stroke and systemic embolism. Patients undergoing percutaneous coronary intervention with drug-eluting stents require dual antiplatelet therapy with aspirin and a thienopyridine for 3 to 12 months or more prevention of stent thrombosis and recurrent ischemic events. When patients with atrial fibrillation undergo percutaneous coronary intervention, the need to combine dual antiplatelet therapy and warfarin raises the risk of major bleeding complications considerably. Recent trials have explored the option of omitting aspirin with promising results. The introduction of novel oral anticoagulants that specifically inhibit factor IIa (dabigatran) or factor Xa (rivaroxaban, apixaban, and edoxaban) and antiplatelet agents that inhibit the P(2)Y(12) receptor (prasugrel and ticagrelor) makes management of these patients even more challenging, but future trials addressing myriad alternative regimens may identify better tolerated strategies.
Weisshaar, Stefan; Litschauer, Brigitte; Bucher, Sebastian; Riesenhuber, Martin; Kapiotis, Stylianos; Kyrle, Paul Alexander; Wolzt, Michael
Abstract Background: There is a need to optimize pharmacological treatment in patients with acute coronary syndrome and concomitant atrial fibrillation, in particular with newer antithrombotic medicines. We have therefore studied if dual or triple combination of antithrombotic agents exert similar effects on coagulation activation in an in vivo model in the skin microvasculature and in an ex vivo perfusion chamber. Methods and Results: Shed blood platelet activation (β-thromboglobulin [β-TG]), thrombin generation (thrombin-antithrombin complex [TAT]) and volume as well as markers of thrombus size (D-dimer) and its platelet content (P-selectin) in a perfusion chamber were studied in a sequential, open-label, parallel group trial in 40 healthy male volunteers (n = 20 per group). Subjects received ticagrelor and apixaban without or with acetylsalicylic acid (ASA). Outcome parameters were assessed at 3 hours after therapy dosing, and at steady-state trough and peak conditions. A triple or dual therapy induced a comparable decrease in shed blood β-TG at 3 hours after therapy dosing but was more pronounced at steady-state conditions with the more intense treatment combination. During both antithrombotic regimens a similarly sustained inhibition in thrombin generation was observed which was accompanied by comparable increases in shed blood volume. In contrast, no treatment effect could be observed in the perfusion chamber experiment. Conclusion: Ticagrelor and apixaban with or without ASA inhibit platelet activation and thrombin formation in vivo in healthy subjects. Platelet inhibition was greater at steady-state conditions after triple therapy administration. PMID:27399131
Cameron, Alan C; McCallum, Linsay; Gardiner, Thomas; Darroch, Claire; Walters, Matthew R; Oldroyd, Keith G
Aims Chest pain presentations are common although most patients do not have an acute coronary syndrome (ACS). We hypothesized that our local therapeutic guideline was leading to many low risk patients being inappropriately treated with potent anti-thrombotic therapy for ACS. Methods We conducted a prospective analysis of patients presenting with suspected ACS to the Western Infirmary Glasgow over a 2 month period between 6/10/13–3/11/13 and 5/4/14–2/5/14. We collated data on demographics, investigation, initial management and final diagnosis. Patients taking warfarin were excluded. We calculated sensitivity, specificity and receiver operating characteristic (ROC) curves for our local guideline, the SIGN guideline and a new guideline proposal. Results We studied 202 patients of whom 112 (55%) were male with mean (SD) age 60 (15) years. Full anti-thrombotic therapy for ACS was recommended in 91 patients (45%) according to the NHS GG&C guideline, 37 (18%) by the SIGN guideline and 30 (15%) by our new guideline proposal. The final diagnosis was ACS in 39 patients (19%). The current NHS GG&C guideline had a sensitivity of 80%, specificity 63% and AUROC 0.71 (95% CI 0.63, 0.80). The respective values were 62%, 92% and 0.77 (95% CI 0.67, 0.86) for the SIGN guideline and 54%, 94% and 0.74 (95% CI 0.64, 0.84) for our new proposed guideline. Conclusions Only one-fifth of patients who present with chest pain or suspected ACS have ACS as their final diagnosis. Our new guideline proposal is highly specific and would minimize unnecessary administration of potent anti-thrombotic therapy to low risk patients. PMID:26147691
Corrado, Alda; Ferrari, Silvia M; Politti, Ugo; Mazzi, Valeria; Miccoli, Mario; Materazzi, Gabriele; Antonelli, Alessandro; Ulisse, Salvatore; Fallahi, Poupak; Miccoli, Paolo
Sorafenib (Nexavar), is a multikinase inhibitor, which has demonstrated both antiproliferative and antiangiogenic properties in vitro and in vivo, inhibiting the activity of targets present in the tumoral cells (c-RAF [proto-oncogene serine/threonine-protein kinase], BRAF, (V600E)BRAF, c-KIT, and FMS-like tyrosine kinase 3) and in tumor vessels (c-RAF, vascular endothelial growth factor receptor [VEGFR]-2, VEGFR-3, and platelet-derived growth factor receptor β). Sorafenib was initially approved for the treatment of hepatocellular carcinoma and advanced renal cell carcinoma. Experimental studies have demonstrated that sorafenib has both antiproliferative and antiangiogenic properties in vitro and in vivo, against thyroid cancer cells. Furthermore, several completed (or ongoing) studies have evaluated the long-term efficacy and tolerability of sorafenib in patients with papillary, follicular and medullary aggressive thyroid cancer. The results of the different studies showed good clinical responses and stabilization of the disease and suggested that sorafenib is a promising therapeutic option in patients with advanced thyroid cancer that is not responsive to traditional therapeutic strategies (such as radioiodine). Currently, USA Food and Drug Administration has approved the use of sorafenib for metastatic differentiated thyroid cancer.
Tomioka, Tomoko; Takeuchi, Satoshi; Ito, Yoshitaka; Shioiri, Hiroki; Koyama, Jiro; Inoue, Kanichi
Patient: Female, 78 Final Diagnosis: Acute myocardial infarction Symptoms: Chest discomfort Medication: — Clinical Procedure: — Specialty: Cardiology Objective: Unusual clinical course Background: Acute myocardial infarction (AMI) can be caused not only by plaque rupture/erosion, but also by many other mechanisms. Thromboembolism due to atrial fibrillation and coronary thrombosis due to coronary artery ectasia are among the causes. Here we report on a case of recurrent myocardial infarction with coronary artery ectasia. Case Report: Our case was a 78-year-old woman with hypertension. Within a one-month interval, she developed AMI twice at the distal portion of her right coronary artery along with coronary artery ectasia. On both events, emergent coronary angiography showed no obvious organic stenosis or trace of plaque rupture at the culprit segment after thrombus aspiration. After the second acute event, we started anticoagulation therapy with warfarin to prevent thrombus formation. In the chronic phase, we confirmed, by using coronary angiography, optimal coherence tomography and intravascular ultrasound, that there was no plaque rupture and no obvious thrombus formation along the coronary artery ectasia segment of the distal right coronary artery, which suggested effectiveness of anticoagulant. Furthermore, by Doppler velocimetry we found sluggish blood flow only in the coronary artery ectasia lesion but not in the left atrium which is generally the main site of systemic thromboembolism revealed by transesophageal echocardiography. Conclusions: These results suggest that the two AMI events at the same coronary artery ectasia segment were caused by local thrombus formation due to local stagnant blood flow. Although it has not yet been generally established, anticoagulation therapy may be effective to prevent thrombus formation in patients with coronary artery ectasia regardless of the prevalence of atrial fibrillation. PMID:27941711
Douketis, James D; Berger, Peter B; Dunn, Andrew S; Jaffer, Amir K; Spyropoulos, Alex C; Becker, Richard C; Ansell, Jack
This article discusses the perioperative management of antithrombotic therapy and is part of the American College of Chest Physicians Evidence-Based Clinical Practice Guidelines (8th Edition). The primary objectives of this article are the following: (1) to address the perioperative management of patients who are receiving vitamin K antagonists (VKAs) or antiplatelet drugs, such as aspirin and clopidogrel, and require an elective surgical or other invasive procedures; and (2) to address the perioperative use of bridging anticoagulation, typically with low-molecular-weight heparin (LMWH) or unfractionated heparin (UFH). A secondary objective is to address the perioperative management of such patients who require urgent surgery. The recommendations in this article incorporate the grading system that is discussed in this supplement (Guyatt G et al, CHEST 2008; 133:123S-131S). Briefly, Grade 1 recommendations are considered strong and indicate that the benefits do (or do not) outweigh risks, burden, and costs, whereas Grade 2 recommendations are referred to as suggestions and imply that individual patient values may lead to different management choices. The key recommendations in this article include the following: in patients with a mechanical heart valve or atrial fibrillation or venous thromboembolism (VTE) at high risk for thromboembolism, we recommend bridging anticoagulation with therapeutic-dose subcutaneous (SC) LMWH or IV UFH over no bridging during temporary interruption of VKA therapy (Grade 1C); in patients with a mechanical heart valve or atrial fibrillation or VTE at moderate risk for thromboembolism, we suggest bridging anticoagulation with therapeutic-dose SC LMWH, therapeutic-dose IV UFH, or low-dose SC LMWH over no bridging during temporary interruption of VKA therapy (Grade 2C); in patients with a mechanical heart valve or atrial fibrillation or VTE at low risk for thromboembolism, we suggest low-dose SC LMWH or no bridging over bridging with
Riva, Francesco M G; Chen, Yen-Chou; Tan, Ngian-Chye; Lin, Pao-Yuan; Tsai, Yun-Ta; Chang, Hsueh-Wen; Kuo, Yur-Ren
Free tissue transfer has become a popular technique for soft tissue defect reconstruction in head and neck cancer ablation. Although high success rates and good reliability of free flaps are proven, microvascular thrombosis is still the most critical issue for microsurgeons. Pharmacological antithrombotic agents are widely used but their efficacy is still debated. In this study, we analyzed whether prostaglandin-E1 (PGE1) and dextran-40 can improve the outcomes compared to no antithrombotic therapy at all. We retrospectively reviewed 1,351 free flaps performed for head and neck reconstruction after cancer ablation. Three groups defined were 232 flaps received PGE1, 283 flaps received dextran-40, and 836 received no antithrombotic therapy. The demographics of these three groups indicated no statistical differences. The results showed that flap survival revealed no significant difference among PGE1, dextran-40, and control group (P = 0.734). There was a tendency to hematomas in PGE1 group (P = 0.056) when compared with other two groups. Dextran-40 significantly increased flap failure rate in high-risk patients with diabetes mellitus (P = 0.006) or hypertension (P = 0.003), when compared with PGE1 and control group. These results revealed antithrombotic therapy with PGE1 and dextran-40 do not determine a significant improvement in flap survival.
Schreuder, Willem H; Coumou, Annet W; Kessler, Peter A H W; de Lange, Jan
In the search for new pharmacologic therapies for central giant cell granuloma (CGCG), proteins that are essential to osteoclastogenesis are intriguing potential targets. In the present case report, we describe a 25-year-old patient with an aggressive CGCG of the maxilla, who was successfully treated with the antiresorptive agent denosumab, after other pharmacologic treatment had failed to achieve regression or stabilization of the tumor. Denosumab could be a promising alternative to potentially mutilating surgery for CGCG. However, more research is needed before definite conclusions can be drawn about the potential role of this agent in the treatment of CGCG.
Staudacher, Dawid L.; Kaiser, Michael; Hehrlein, Christoph; Bode, Christoph; Ahrens, Ingo
Antithrombotic therapy consisting of a dual anti-platelet therapy (DAPT) and oral anti-coagulation (OAC) with a vitamin k antagonist is often referred to as triple therapy. This combined anticoagulation is applied in patients undergoing coronary artery stent implantation while also having an indication for OAC. Triple therapy increases the risk for bleeding events compared to either DAPT or OAC alone and thereby might be associated with adverse outcomes. Clinical data on the frequency of bleeding events in patients on triple therapy from clinical trials derives from pre-selected patients and may differ from the real world patients. We report data on patient characteristics and bleeding incidence of patients dismissed on triple therapy from a single university hospital. Within the time span from January 2000 to December 2012, we identified a total of 213 patients undergoing PCI who were prescribed a triple therapy for at least 4 weeks (representing 0.86% of all patients treated). The usage of triple therapy significantly increased over the observed time period. The average CHA2DS2-VASc Score was 3.1 ± 1.1 with an average HAS-BLED score of 2.5 ± 0.86 representing a high-risk group for thromboembolic events as well as considerable risk for bleeding events. An on-treatment bleeding incidence of 9.4% was detected, with gastrointestinal and airway bleeding being the most frequent (5.1% and 1.4%, respectively). This is consistent with data from clinical trials and confirms the high risk of bleeding in patients on DAPT plus OAC. 29.0% of all patients receiving triple therapy had an indication for OAC other than non-valvular atrial fibrillation. This substantial patient group is underrepresented by clinical trials and needs further attention. PMID:26439131
Wallace, Carol A.; Giannini, Edward H.; Spalding, Steven J.; Hashkes, Philip J.; O’Neil, Kathleen M.; Zeft, Andrew S.; Szer, Ilona S.; Ringold, Sarah; Brunner, Hermine I.; Schanberg, Laura E.; Sundel, Robert P.; Milojevic, Diana; Punaro, Marilynn G.; Chira, Peter; Gottlieb, Beth S.; Higgins, Gloria C.; Ilowite, Norman T.; Kimura, Yukiko; Hamilton, Stephanie; Johnson, Anne; Huang, Bin; Lovell, Daniel J.
OBJECTIVES To determine if aggressive treatment initiated early in the course of rheumatoid factor positive or negative polyarticular juvenile idiopathic arthritis (poly-JIA) can induce clinical inactive disease (CID) within 6 months. METHODS Between May 2007 and October 2010 a multi-center, prospective, double blind, randomized, placebo controlled trial of two aggressive treatments was conducted in 85 children aged 2 to 16 years with polyarticular JIA of less than 12 months duration. Patients received either methotrexate 0.5 mg/kg/wk SQ (40 mg max), etanercept 0.8 mg/kg/wk (50 mg max), prednisolone 0.5 mg/kg/d (60 mg max) tapered to 0 by 17 weeks (Arm 1), or methotrexate (same dose as Arm 1), etanercept placebo, and prednisolone placebo (Arm 2). The primary outcome was CID at 6 months. An exploratory phase determined the rate of clinical remission on medication (6 months of continuous CID) at 12 months. RESULTS By 6 months, 17 of 42 (40%) of patients in Arm 1 and 10 of 43 (23%) in Arm 2 had achieved CID (X2 = 2.91; p = 0.088). After 12 months, 9 patients in Arm 1 and 3 in Arm 2 achieved clinical remission on medication (p = 0.0534). There were no significant inter-arm differences in adverse events. CONCLUSIONS Although this study did not meet its primary endpoint, early aggressive therapy in this cohort of children with recent onset polyarticular JIA resulted in substantial proportions of patients in both arms achieving CID by 6 months and clinical remission on medication within 12 months of treatment. PMID:22183975
Losa, Marco; Bogazzi, Fausto; Cannavo, Salvo; Ceccato, Filippo; Curtò, Lorenzo; De Marinis, Laura; Iacovazzo, Donato; Lombardi, Giuseppe; Mantovani, Giovanna; Mazza, Elena; Minniti, Giuseppe; Nizzoli, Maurizio; Reni, Michele; Scaroni, Carla
Temozolomide is effective in some patients with progressive pituitary adenoma or carcinoma. We report a survey study of Italian patients treated with Temozolomide because of aggressive pituitary adenoma or carcinoma resistant to standard therapies. Italian endocrinologists were surveyed and asked to participate into the study. A questionnaire was sent to all those who agreed and had used Temozolomide in at least one patient with pituitary tumor. Database was closed in December 2013. A literature review was also performed. Thirty-one patients were included into the analysis. Mean age at start of Temozolomide treatment was 58.3 ± 1.9 years (± standard error). Six of the 31 (19.4%) Italian patients had a pituitary carcinoma. Twenty-five patients (80.6%) had disease control during Temozolomide treatment, while 6 patients (19.4%) had disease progression. Median follow-up after beginning Temozolomide was 43 months. Thirteen patients had tumor growth after stopping Temozolomide. The 2-year progression-free survival was 47.7% (95% CI 29.5-65.9%), while the 2-year disease control duration was 59.1% (95% CI 39.1-79.1%). Eleven patients died of progressive disease and other two patients of unrelated causes. The 2-year and 4-year overall survival rates were 83.9% (95% CI 70.7-97.1%) and 59.6% (95% CI 40.0-79.2%), respectively. Temozolomide is an additional effective therapeutic option for the treatment of aggressive pituitary tumors. The drug is well tolerated and causes few severe adverse effects. Recurrence of the tumor can occur after an initial positive response and usually portends a grim outcome.
Moroi, Alyssa J; Watson, Steve P
Phosphoinositide 3-kinases (PI3Ks) are a family of lipid kinases that are activated in response to various stimulants, and they regulate many processes including inflammation; the stress response; gene transcription; and cell proliferation, differentiation, and death. Increasing reports have shown that the PI3Ks and their downstream effector Akt are activated by several platelet receptors that regulate platelet activation and haemostasis. Platelets express two immunoreceptor tyrosine based activation motif (ITAM) receptors, collagen receptor glycoprotein VI (GPVI) and Fcγ receptor IIA (FcγRIIA), which are characterized by two YxxL sequences separated by 6-12 amino acids. Activation of an ITAM receptor initiates a reaction cascade via its YxxL sequence in which signaling molecules such as spleen tyrosine kinase (Syk), linker for activation of T cells (LAT) and phospholipase C γ2 (PLCγ2) become activated, leading to platelet activation. Platelets also express another receptor, C-type lectin 2 (CLEC-2), which has a single YxxL sequence, so it is appropriately called a hemITAM receptor. ITAM receptors and the hemITAM receptor share many signaling features. Here we will summarize our current knowledge about how the PI3K/Akt pathway regulates (hem)ITAM receptor-mediated platelet activation and haemostasis and discuss the possible benefits of targeting PI3K/Akt as an antithrombotic therapy.
Yektatalab, Shahrzad; Alipour, Abdolrasool; Edraki, Mitra; Tavakoli, Pouran
Background: Aggression is a kind of behavior that causes damage or harm to others. The prevalence of aggression is 8–20% in 3–6 years old children. The present study aimed to assess the effect of training kindergarten teachers regarding reinforcement behavior therapy on preschoolers’ aggression. Methods: In this cluster randomized control trial, 14 out of 35 kindergarten and preschool centers of Mohr city, Iran, were chosen using random cluster sampling and then randomly assigned to an intervention and a control group. All 370 kindergarten and preschool children in 14 kindergarten were assessed by preschoolers’ aggression questionnaire and 60 children who obtained a minimum aggression score of 117.48 for girls and 125.77 for boys were randomly selected. The teachers in the intervention group participated in 4 educational sessions on behavior therapy and then practiced this technique under the supervision of the researcher for two months. Preschoolers’ aggression questionnaire was computed in both intervention and control groups before and after a two-month period. Results: The results demonstrated a significant statistical difference in the total aggression score (P=0.01), verbal (P=0.02) and physical (P=0.01) aggression subscales scores in the intervention group in comparison to the control group after the intervention. But the scores of relational aggression (P=0.09) and impulsive anger (P=0.08) subscales were not statistically different in the intervention group compared to the controls. Conclusion: This study highlighted the importance of teaching reinforcement behavior therapy by kindergarten teachers in decreasing verbal and physical aggression in preschoolers. Trial Registration Number: IRCT2014042617436N1 PMID:26793733
Approach to outcome measurement in the prevention of thrombosis in surgical and medical patients: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines.
Guyatt, Gordon H; Eikelboom, John W; Gould, Michael K; Garcia, David A; Crowther, Mark; Murad, M Hassan; Kahn, Susan R; Falck-Ytter, Yngve; Francis, Charles W; Lansberg, Maarten G; Akl, Elie A; Hirsh, Jack
This article provides the rationale for the approach to making recommendations primarily used in four articles of the Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines: orthopedic surgery, nonorthopedic surgery, nonsurgical patients, and stroke. Some of the early clinical trials of antithrombotic prophylaxis with a placebo or no treatment group used symptomatic VTE and fatal PE to measure efficacy of the treatment. These trials suggest a benefit of thromboprophylaxis in reducing fatal PE. In contrast, most of the recent clinical trials comparing the efficacy of alternative anticoagulants used a surrogate outcome, asymptomatic DVT detected at mandatory venography. This outcome is fundamentally unsatisfactory because it does not allow a trade-off with serious bleeding; that trade-off requires knowledge of the number of symptomatic events that thromboprophylaxis prevents. In this article, we review the merits and limitations of four approaches to estimating reduction in symptomatic thrombosis: (1) direct measurement of symptomatic thrombosis, (2) use of asymptomatic events for relative risks and symptomatic events from randomized controlled trials for baseline risk, (3) use of baseline risk estimates from studies that did not perform surveillance and relative effect from asymptomatic events in randomized controlled trials, and (4) use of available data to estimate the proportion of asymptomatic events that will become symptomatic. All approaches have their limitations. The optimal choice of approach depends on the nature of the evidence available.
Seshadri, Roopa; Feldman, Brian M.; Ilowite, Norman; Cawkwell, Gail; Pachman, Lauren M.
Objective To compare outcomes at 36 months in patients newly diagnosed with juvenile dermatomyositis (DM) treated with aggressive versus standard therapy. Methods At diagnosis, 139 untreated juvenile DM patients were given aggressive therapy (intravenous methylprednisolone or oral prednisone 5–30 mg/kg/day; n = 76) or standard therapy (1–2 mg/kg/day; n = 63) by the treating physician. Aggressive therapy patients were more ill at diagnosis. Matching was based on the propensity for aggressive therapy because propensity scoring can reduce confounding by indication. Logistic regression of the matched data determined predictors of outcomes, controlling for clinical confounders and propensity score. Outcomes comprised Disease Activity Score (DAS) for skin and muscle, range of motion (ROM), and calcification. Results Sex, race, and age were similar between groups, and initial DAS weakness and ROM significantly predicted the therapy chosen. Based on propensity scores, 42 patients from each group were well matched. In the matched pairs, there were no significant differences in outcomes. Methotrexate use (odds ratio [OR] 3.6, 95% confidence interval [95% CI] 1.15–11.5) and duration of untreated disease (OR 1.2, 95% CI 1–1.38) were associated with ROM loss, hydroxychloroquine use (OR 11.2, 95% CI 3.7–33) and calcification (OR 6.8, 95% CI 1.8–25.4) with persistent rash, abnormal baseline lactate dehydrogenase (OR 11.2, 95% CI 1.4–92) and age at onset (OR 1.3, 95% CI 1–1.4) with weakness, and duration of untreated disease (OR 1.2, 95% CI 1–1.39) with calcification. Conclusion Using a retrospective, nonrandomized design with propensity score matching, there was little difference in efficacy outcomes between aggressive and standard therapy; however, the sickest patients were treated with aggressive therapy and were not included in the matched analysis. Comprehensive clinical studies are needed to determine therapeutic pathways to the best outcome. PMID:18576304
Tsilianidis, Laurie A; Fiske, Laurie M; Siegel, Sara; Lumpkin, Chris; Hoyt, Kate; Wasserstein, Melissa; Weinstein, David A
Glycogen storage disease type IX (GSD IX) is described as a benign condition that often does not require treatment. Most patients with the disease are thought to outgrow the childhood manifestations, which include hepatomegaly, poor growth, and ketosis with or without hypoglycemia. Long term complications including fibrosis and cirrhosis have seldom been reported in the most common subtype, GSD IXα. We present two cases of children with GSD IXα who had fibrosis at the time of diagnosis in addition to the commonly reported disease manifestations. Structured therapy with frequent doses of uncooked cornstarch and protein supplementation was initiated, and both children responded with improved growth velocity, increased energy, decreased hepatomegaly and improved well-being. Additionally, radiographic features of fibrosis improved. We propose that GSD IXα is not a benign condition. Even in patients with a less severe presentation, consideration of a structured treatment regimen to improve quality of life appears warranted.
Cuccurullo, Rosanna; Govi, Silvia; Ferreri, Andrés JM
The treatment of primary gastric diffuse large B-cell lymphoma (DLBCL) has changed radically over the last 10–15 years, with the abandonment of routine gastrectomy in favor of more conservative therapies. Low-level evidence suggests that consolidation radiotherapy could be avoided in patients with limited-stage DLBCL of the stomach who achieve complete remission after rituximab-CHOP combination. Small, recent prospective trials suggest that selected patients with limited-stage Helicobacter pylori (H. pylori)-positive DLBCL of the stomach and favorable prognostic factors can be managed with antibiotics alone, with excellent disease control and cure rates, keeping chemo-radiotherapy for unresponsive patients. This recommendation should equally regard patients with mucosa-associated lymphoid tissue-related or de novo DLBCL. Future studies should be focused on the establishment of reliable variables able to distinguish the best candidates for exclusive treatment with H. pylori eradication from those who need for conventional chemo-immunotherapy. PMID:25083073
Prevalence of Atrial Fibrillation and Antithrombotic Therapy in Hemodialysis Patients: Cross-Sectional Results of the Vienna InVestigation of AtriaL Fibrillation and Thromboembolism in Patients on HemoDIalysis (VIVALDI)
Königsbrügge, Oliver; Posch, Florian; Antlanger, Marlies; Kovarik, Josef; Klauser-Braun, Renate; Kletzmayr, Josef; Schmaldienst, Sabine; Auinger, Martin; Zuntner, Günther; Lorenz, Matthias; Grilz, Ella; Stampfel, Gerald; Steiner, Stefan; Pabinger, Ingrid; Säemann, Marcus; Ay, Cihan
Background Atrial fibrillation (AF) adds significant risk of stroke and thromboembolism in patients on hemodialysis (HD). The aim of this study was to investigate the prevalence of AF in a population-based cohort of HD patients and practice patterns of antithrombotic therapy for stroke prevention in AF. Methods The Vienna InVestigation of AtriaL fibrillation and thromboembolism in patients on hemodialysis (VIVALDI), an ongoing prospective observational cohort study, investigates the prevalence of AF and the risk of thromboembolic events in HD patients in Vienna, Austria. We analyzed cross-sectional data of 626 patients (63.4% men, median age 66 years, approx. 73% of HD patients in Vienna), who provided informed consent. A structured interview with each patient was performed, recent and archived ECGs were viewed and medical histories were verified with electronic records. Results The overall prevalence of AF was 26.5% (166 patients, 71.1% men, median age 72 years) of which 57.8% had paroxysmal AF, 3.0% persistent AF, 32.5% permanent AF, and 6.6% of patients had newly diagnosed AF. The median CHA2DS2-VASc Score was 4 [25th-75th percentile 3–5]. In multivariable analysis, AF was independently associated with age (odds ratio: 1.05 per year increase, 95% confidence interval: 1.03–1.07), male sex (1.7, 1.1–2.6), history of venous thromboembolism (2.0, 1.1–3.6), congestive heart failure (1.7, 1.1–2.5), history of or active cancer (1.5, 1.0–2.4) and time on HD (1.08 per year on HD, 1.03–1.13). Antithrombotic treatment was applied in 84.4% of AF patients (anticoagulant agents in 29.5%, antiplatelet agents in 33.7%, and both in 21.1%). In AF patients, vitamin-K-antagonists were used more often than low-molecular-weight heparins (30.1% and 19.9%). Conclusions The prevalence of AF is high amongst HD patients and is associated with age, sex, and distinct comorbidities. Practice patterns of antithrombotic treatment indicate a lack of consensus for stroke prevention
Little, James W; Miller, Craig S; Henry, Robert G; McIntosh, Bruce A
Thrombosis and the complicating emboli that can result are important causes of illness and death. Thrombosis is of greater overall clinical importance in terms of morbidity and mortality than all of the hemorrhagic disorders combined. Agents such as heparin, low-molecular weight heparin, warfarin, aspirin, ticlopidine, clopidogrel, and tirofiban are used to prevent venous or arterial thrombosis. Patients taking these antithrombotic agents may be at risk for excessive bleeding after invasive dental procedures. The current antithrombotic agents used in medicine are reviewed, and the dental management of patients taking these agents is discussed.
Haq, Aazaz U; Ghaziuddin, Neera
Frequent aggression toward others and repetitive self-injurious behaviors (SIB) can be features of catatonia in patients with autism. Similar to catatonia secondary to other etiologies, catatonia associated with autism responds well to treatment with benzodiazepines and/or electroconvulsive therapy (ECT). The authors report here on two adolescent patients with autism who presented with severe aggression, one of whom also engaged in repetitive SIB. With ongoing treatment with maintenance ECT, dramatic reduction in aggression and SIB were noted, allowing both patients a reasonable quality of life in their own homes. Attempts to taper off ECT coincided with return of aggression symptoms, although not SIB.
Atta, Johannes; Chow, Kai U; Weidmann, Eckhart; Mitrou, Paris S; Hoelzer, Dieter; Martin, Hans
Although aggressive NHL in relapse after remission can still be cured by second-line treatment followed by high-dose therapy and autologous stem cell transplantation, the long-term prognosis of patients who fail to obtain remission after first-line therapy remains extremely poor. We retrospectively evaluated a series of 29 consecutive patients with primary refractory high-grade NHL who were treated with Dexa-BEAM (DB) as uniform salvage therapy at a single institution. Twenty-nine patients with aggressive NHL primary refractory to CHOP or CHOP-like induction therapy with a median age of 47 (range, 22 - 64) years received 1 - 2 cycles of DB and were candidates for subsequent autologous stem cell (PBSC) mobilization and transplantation (PBSCT). Follow-up of all patients was updated in March 2004. Eight of 29 patients (28%) responded to one cycle of DB (1 complete/7 partial remissions); 2 of whom are alive after PBSCT (1 autologous/1 matched unrelated donor), 1 patient died after autologous PBSCT. Reasons for failure to proceed to high-dose therapy in spite of response to DB were recurrent progressive disease (n = 2), septicemia (n = 1), and allogeneic transplant-related mortality after mobilization failure to DB (n = 2). Twenty-one patients failed to respond to DB and died of progressive disease. Overall survival was 7% after 41 months. We conclude that Dexa-BEAM salvage therapy is not effective in patients with truly primary refractory high-grade NHL. The efficiency of rituximab combined with Dexa-BEAM or novel chemotherapeutic strategies needs to be established.
Drazin, Doniel; Lehman, Deborah; Danielpour, Moise
Bacillus cereus meningitis is a rare disease with a very high mortality rate in neonates. The authors present the rare case of a premature infant with B. cereus bacteremia and subsequent intracranial abscesses. In addition to aggressive medical therapy, surgical drainage was performed via a left frontal mini-craniotomy. At 15 months of age, the patient had mild developmental delay, cortical blindness, and sensorineural hearing loss. The clinical case is described and difficulties in the management of B. cereus meningoencephalitis in infants are discussed.
Misir Krpan, Ana; Dusek, Tina; Rakusic, Zoran; Solak, Mirsala; Kraljevic, Ivana; Bisof, Vesna; Ozretic, David; Kastelan, Darko
Background and Importance. In the last eight years temozolomide (TMZ) has been used as the last-line treatment modality for aggressive pituitary tumors to be applied after the failure of surgery, medical therapy, and radiotherapy. The objective was to achieve a rapid control of tumor growth and hormone normalization with concurrent chemoradiotherapy in a patient with very aggressive ACTH pituitary adenoma. Clinical Presentation. We describe a patient with an aggressive ACTH-producing adenoma treated with concurrent temozolomide and radiotherapy. The patient suffered from an aggressive ACTH adenoma resistant to surgical and medical treatment. After two months of concurrent temozolomide and radiotherapy, cortisol normalization and significant tumor shrinkage were observed. After 22 months of follow-up, there is still no evidence of tumor recurrence. Conclusion. Concurrent treatment with temozolomide and irradiation appears to be highly effective in the achievement of the tumor volume control as well as in the control of ACTH secretion in aggressive ACTH adenoma.
Background and Importance. In the last eight years temozolomide (TMZ) has been used as the last-line treatment modality for aggressive pituitary tumors to be applied after the failure of surgery, medical therapy, and radiotherapy. The objective was to achieve a rapid control of tumor growth and hormone normalization with concurrent chemoradiotherapy in a patient with very aggressive ACTH pituitary adenoma. Clinical Presentation. We describe a patient with an aggressive ACTH-producing adenoma treated with concurrent temozolomide and radiotherapy. The patient suffered from an aggressive ACTH adenoma resistant to surgical and medical treatment. After two months of concurrent temozolomide and radiotherapy, cortisol normalization and significant tumor shrinkage were observed. After 22 months of follow-up, there is still no evidence of tumor recurrence. Conclusion. Concurrent treatment with temozolomide and irradiation appears to be highly effective in the achievement of the tumor volume control as well as in the control of ACTH secretion in aggressive ACTH adenoma. PMID:28357143
Black, Jonathan D; English, Diana P; Roque, Dana M; Santin, Alessandro D
Uterine serous carcinoma (USC) is a highly aggressive variant of endometrial cancer. Although it only represents less than 10% of all cases, it accounts for a disproportionate number of deaths from endometrial cancer. Comprehensive surgical staging followed by carboplatin and paclitaxel chemotherapy represents the mainstay of USC therapy. Vaginal cuff brachytherapy is also of potential benefit in USC. Recent whole-exome sequencing studies have demonstrated gain of function of the HER2/NEU gene, as well as driver mutations in the PIK3CA/AKT/mTOR and cyclin E/FBXW7 oncogenic pathways in a large number of USCs. These results emphasize the relevance of these novel therapeutic targets for biologic therapy of chemotherapy-resistant recurrent USC.
Morice, C; Acher, A; Soufir, N; Michel, M; Comoz, F; Leroy, D; Verneuil, L
Voriconazole is a treatment for severe fungal infections. Prolonged voriconazole therapy may induce skin reactions, with 1% of severe photosensitivity accidents. Recently the imputability of voriconazole in skin carcinogenesis has been suggested. This report concerns a 55-year-old man suffering from pulmonary aspergillosis who presented a phototoxic reaction a few months after introduction of voriconazole, followed by multiple squamous cell carcinomas of sun-exposed skin areas. After voriconazole discontinuation, no new carcinoma was observed. The detection of EBV and HPV in skin lesions was negative. Exploration of gene mutations involved in skin carcinogenesis showed two variants of the MICR gene. The occurrence of multiple, recurrent, aggressive squamous cell carcinomas is rare with voriconazole, but its imputability is strongly suggested. A plausible hypothesis is that several factors including voriconazole uptake, immunosuppression, and genetic background could explain the phenotype of fast-developing skin carcinomas. Voriconazole therapy should be accompanied by stringent photoprotection and skin monitoring.
Background Aggressive periodontitis (AgP) is a severe form of periodontal diseases with rapid destruction of the supporting bone around teeth. The efficacy of PDT in suppressing periodontal pathogens may be crucial in adopting new protocols for the treatment of AgP. Thus, the aim of this systematic review was to investigate the possible role of PDT in the treatment of AgP as an adjunctive therapy or monotherapy. Material and Methods A systematic search of the literature was performed. Additionally, the references from all the selected full-text studies were searched for relevant articles. Two reviewers screened independently titles and abstracts or full text copies. Quality assessment of all the included studies was held. Results Initial screening of electronic databases yielded 418 potentially relevant publications. After screening of the titles and full-text examination, five studies were included in the systematic review. Four publications evaluated the effects of PDT adjunctive to SRP in patients with AgP: two of them compared the clinical outcomes of SRP and PDT with a control group that received therapy with SRP and antibiotics (metronidazole and amoxicillin); two publications included SRP and PDT in the test group, and SRP alone in the control group. In one study, PDT was tested as a monotherapy compared with SRP alone. Conclusions Within the limitations of this review, PDT may exhibit a beneficial role in the therapy of aggressive periodontitis after repeated applications. In the future, more methodologically sound, long-term randomized clinical trials are needed to be conducted. Key words:Photodynamic therapy, periodontitis, systematic review. PMID:26595837
Mega, Jessica L; Simon, Tabassome
Antithrombotic drugs, which include antiplatelet and anticoagulant therapies, prevent and treat many cardiovascular disorders and, as such, are some of the most commonly prescribed drugs worldwide. The first drugs designed to inhibit platelets or coagulation factors, such as the antiplatelet clopidogrel and the anticoagulant warfarin, significantly reduced the risk of thrombotic events at the cost of increased bleeding in patients. However, both clopidogrel and warfarin have some pharmacological limitations including interpatient variability in antithrombotic effects in part due to the metabolism, interactions (eg, drug, environment, and genetic), or targets of the drugs. Increased knowledge of the pharmacology of antithrombotic drugs and the mechanisms underlying thrombosis has led to the development of newer drugs with faster onset of action, fewer interactions, and less interpatient variability in their antithrombotic effects than previous antithrombotic drugs. Treatment options now include the next-generation antiplatelet drugs prasugrel and ticagrelor, and, in terms of anticoagulants, inhibitors that directly target factor IIa (dabigatran) or Xa (rivaroxaban, apixaban, edoxaban) are available. In this Series paper we review the pharmacological properties of these most commonly used oral antithrombotic drugs, and explore the development of antiplatelet and anticoagulant therapies.
Hwang, Jin-Young; Oh, Sohee; Kim, Chong-Soo; Chang, Jee-Eun; Min, Seong-Won
Abstract The number of elderly patients undergoing total knee arthroplasty (TKA) has steadily increased. Elderly patients undergoing TKA usually have underlying diseases, and some of them take antithrombotic agents for the prevention or treatment of these co-morbidities, including cardiovascular, cerebrovascular, or thromboembolic diseases. When these patients are scheduled to undergo TKA, preoperative cessation of antithrombotic agents is considered on the basis of its risks and benefits. This study was aimed to evaluate the impact of discontinuing antithrombotic agents for primary total knee arthroplasty (TKA) on perioperative complications. Patients who underwent primary TKA between 2008 and 2012 were identified, and classified into two groups: group A, in whom antithrombotic agents were ceased preoperatively, and group B, in which patients did not receive antithrombotic therapy. Patient characteristics, history of antithrombotic therapy, intraoperative blood loss, perioperative blood transfusion, postoperative 30-day complications, and postoperative hospital stay were recorded. Of 885 patients undergoing primary TKA, 218 (24.6%) patients were included in group A, and 667 (75.4%) in group B. Group A received transfusion more frequently than group B (P < 0.001). However, there was no difference between the two groups in terms of intraoperative blood loss, postoperative 30-day complications, and postoperative hospital stay. Patients who discontinued antithrombotic drugs before primary TKA do not have a higher incidence of postoperative 30-day complications, including cardiovascular, cerebrovascular, or thromboembolic events. Moreover, the estimated intraoperative blood loss was not different compared with patients not receiving antithrombotic agents preoperatively. Larger prospective studies of this issue are required. PMID:27902607
Background Mooren’s ulcer is a severe ulcerative inflammation of the cornea. The exact pathogenesis remains unclear. Therefore many therapies of Mooren’s ulcer are recommended in literature. To shed more light on the ongoing question of optimal treatment of severe progressive Mooren’s ulcer, we here report on a retrospective case series of patients treated with systemic immunosuppressive therapy and additional amniotic membrane transplantation. Methods Medical records from seven patients (eleven eyes), 4 male and 3 female, with severe progressive Mooren’s ulcer were analysed retrospectively. The mean follow up was 88.4 ± 80.8 months (range 12–232 month). A HLA-typing was performed in all patients. A systemic immunosuppressive therapy was administered in all patients. The amniotic membrane was transplanted after the base of the ulcer was resected. Results Multiple amniotic membrane transplantations were necessary in six patients. The visual outcome of all patients was poor. No patient achieved a visual acuity better than 20/630 Snellen chart. Five patients were positive for HLA-DQ2 and four patients were positive for HLA-DR17(3). Conclusions The aggressive and highly inflammatory form of Mooren’s ulcer is difficult to treat and the progression of the disease is hard to influence positively even under systemic immunosuppressive therapy. Therefore, the main intention of therapy is to achieve a stable epithelialized corneal surface without the risk of perforation. Amniotic membrane transplantation is not able to cure severe forms of Mooren’s ulcer. However it supports the immunosuppressive therapy in acute situations as in critical corneal thinning. PMID:24345289
Goel, Shalini; Mohapatra, Ishani; Gajendra, Smeeta; Gupta, Sunil
Primary Testicular Lymphoma (PTL) is a rare intermediate to high grade tumour, diffuse large cell being the most common type. Unlike nodal Diffuse Large B-Cell Lymphoma (DLBCL), testicular DLBCL has a less aggressive course and better prognosis. Metastasis is uncommon in testicular DLBCL. Commonly involved sites are contralateral testes, Waldeyer’s ring, skin, lung, Central Nervous System (CNS) and prostate, however the kidneys, liver, bone marrow, pleura and bones are more rarely involved. We report a case of testicular DLBCL which has metastasized to skin and bone marrow with an aggressive clinical course in a year, in-spite of combined modality of therapy given to the patient. Bone marrow infiltration is common and well documented with nodal DLBCL, however there is no published literature for simultaneous bone marrow and skin infiltration in testicular DLBCL till date. Other large studies done in the west have shown that distinct metastasis is usually common but the median progression-free survival is usually in years. This case stresses on shorter period of progression after standard treatment protocol in this part of the world, thus highlighting the need for other extensive studies to define specific treatment protocol for testicular DLBCL. PMID:27630854
Plomondon, Mary E.; Lambert‐Kerzner, Anne C.; Jennewein, Xuefei; Fagan, Katherine; McCreight, Marina; Fehling, Kelty B.; Tsai, Thomas T.; Ho, P. Michael
Background Antithrombotic therapy for acute coronary syndrome (ACS) patients is recommended by clinical practice guidelines. Appropriate dosing of antithrombotic therapy is necessary to ensure effectiveness and safety and is an American College of Cardiology/American Heart Association ST elevated myocardial infarction/non‐ST elevated myocardial infarction performance measure. This study describes the variability in dosing of unfractionated heparin (UH) and low‐molecular‐weight heparin (LMWH) in an integrated health care system with electronic medical records and computerized physician order entry (CPOE). Methods and Results This was a mixed‐methods study of veterans presenting with ACS at 135 Veterans Health Administration hospitals from 2009 to 2011. Patients hospitalized with ACS and received antithrombotic therapy were included (n=36 682). The cohort was 98% male with an average age of 66 years and median body mass index (BMI) of 28.6. The average percentage of patients by hospital who received an above‐recommended dose of either antithrombotic was 7.5% and ranged 0% to 32.0%. By individual therapy, the average percentage of patients by hospital who received an above‐recommended dose of UH was 1.2% and LMWH was 12.9%. Risk‐adjusted analyses demonstrated that older age and higher BMI were associated with lower risk for receiving a dose above recommended levels. Additionally, there was an association between antithrombotic ordered by a resident and higher risk of the patient receiving an above‐recommended dose. Qualitative interviews supported the quantitative findings by highlighting the need to use current patient weight and the need to adequately train providers on the use of CPOE to improve antithrombotic dosing. Conclusion This study found wide hospital variability in dosing of antithrombotics above the recommended level for patients treated for ACS. PMID:25917444
Menderes, Gulden; Clark, Mitchell; Santin, Alessandro D
Uterine serous carcinoma (USC) is a rare but aggressive subtype of endometrial cancer. Although it represents only 10% of all endometrial cancer cases, USC accounts for up to 40% of all endometrial cancer-related recurrences and subsequent deaths. With such a dismal prognosis, there is an expanding role for novel targeted approaches in the treatment of USC. Recent whole-exome sequencing studies have demonstrated gain of function of the HER2/NEU gene, as well as driver mutations in the PIK3CA/AKT/mTOR and cyclin E/FBXW7 oncogenic pathways in a large number of USCs. The results emphasize the relevance of these novel therapeutic targets for biologic therapy of USC, which will be reviewed in this article.
Dézsi, Csaba András; Dézsi, Balázs Bence; Dézsi, Döme András
Coronary artery disease coexists in a clinically relevant number of patients with atrial fibrillation and it often requires percutaneous coronary intervention. These patients represent a particular challenge for clinicians in terms of antithrombotic management. They require combined antiplatelet-anticoagulant therapy to reduce the risk of recurrent ischemic cardiac events and stroke; however, this antithrombotic strategy is associated with an increased risk of bleeding complications. In the absence of randomized, controlled clinical trials, the majority of current recommendations rely on the results of cohort studies, meta-analyses, post-hoc analyses and subgroup analyses of large, phase III studies. Based on the available evidence, the present review discusses the optimal antithrombotic strategy for patients receiving chronic anticoagulant therapy due to atrial fibrillation who require antiplatelet treatment after acute coronary syndrome and/or percutaneous coronary intervention, and discusses the issue of dental procedures. The correct planning of therapy significantly reduces the risk of bleeding complications and thromboembolic events.
Wang, Yishen; Bajorek, Beata
Background For stroke prevention in patients with atrial fibrillation (AF), the decision-making around antithrombotic therapy has been complicated by older age, multiple comorbidities, polypharmacy and the different pharmacological properties of warfarin and the nonvitamin K antagonist oral anticoagulants (NOACs). The complexity of decision-making has been associated with a reluctance by health professionals to use antithrombotic therapy, leading to poor clinical outcomes. In order to improve stroke prevention in patients with AF, the contemporary perspectives of health professionals on the decision-making around antithrombotic therapy needs exploration. Objective To elicit emerging themes describing health professionals' perspectives on the decision-making around antithrombotic therapy for stroke prevention in patients with AF. Setting Sydney metropolitan area of New South Wales, Australia. Method A qualitative study based on face-to-face interviews was conducted from August to October 2014. Seven pharmacists, seven specialists, six general practitioners and six nurses practising in the Sydney metropolitan area and managing antithrombotic therapy for AF were interviewed until theme saturation was achieved in each subgroup. Interview transcripts were analysed using manual inductive coding. Main outcome measure Emerging themes describing health professionals' perspectives on the decision-making around antithrombotic therapy for stroke prevention in patients with AF. Results Three overarching themes emerged. (1) Comprehensive assessment is necessary for decision-making but is not always implemented. Health professionals mostly focused on stroke risk assessment, not on the bleeding risk and medication safety issues. (2) Health professionals from different disciplines have different preferences for antithrombotic therapies. Although the majority of health professionals considered warfarin as the first-line therapy, NOACs were preferred by neurologists and
Gitt, A K; Zahn, R
Stable chronic coronary artery disease (SCAD) encompasses several groups of patients including those with stable angina pectoris or other symptoms thought to be linked to CAD as well as patients with known prior acute coronary syndrome or prior coronary interventions, who have become asymptomatic with treatment and need regular follow-up. Patients with SCAD have an elevated risk for subsequent ischemic events and significantly benefit not only from lipid-lowering therapy with statins but also in particular from long-term antithrombotic treatment. These patients therefore need lifelong antithrombotic treatment with 100 mg acetylsalicylic acid (ASA) daily whereby clopidogrel 75 mg daily is indicated as an alternative in cases of aspirin intolerance. As chronic CAD may present with very different developmental phases spanning from chronic stable phases to acute coronary syndromes, antithrombotic treatment in SCAD patients needs continuous evaluation and adaptation. In addition, new concomitant diseases, such as atrial fibrillation may necessitate further adaptation of antithrombotic therapy. The current overview focuses on the description of the long-term antithrombotic treatment of SCAD as well as on the need for adaptation in the setting of elective percutaneous coronary interventions (PCI).
Cooper, Odelia; Mamelak, Adam; Bannykh, Serguei; Carmichael, John; Bonert, Vivien; Lim, Stephen; Cook-Wiens, Galen; Ben-Shlomo, Anat
As ErbB signaling is a determinant of prolactin synthesis, role of ErbB receptors was tested for prolactinoma outcomes and therapy. The objective of this study was to characterize ErbB receptor expression in prolactinomas and then perform a pilot study treating resistant prolactinomas with a targeted tyrosine kinase inhibitor (TKI). Retrospective analysis of prolactinomas and pilot study for dopamine agonist resistant prolactinomas in tertiary referral center. We performed immunofluorescent staining of a tissue array of 29 resected prolactinoma tissues for EGFR, ErbB2, ErbB3, and ErbB4 correlated with clinical features. Two patients with aggressive resistant prolactinomas enrolled and completed trial. They received lapatinib 1,250 mg daily for 6 months with tumor and hormone assessments. Main outcome measures were positive tumor staining of respective ErbB receptors, therapeutic reduction of prolactin levels and tumor shrinkage. Treated PRL levels and tumor volumes were suppressed in both subjects treated with TKI. EGFR expression was positive in 82 % of adenomas, ErbB2 in 92 %, ErbB3 in 25 %, and ErbB4 in 71 %, with ErbB2 score > EGFR > ErbB4 > ErbB3. Higher ErbB3 expression was associated with optic chiasm compression (p = 0.03), suprasellar extension (p = 0.04), and carotid artery encasement (p = 0.01). Higher DA response rates were observed in tumors with higher ErbB3 expression. Prolactinoma expression of specific ErbB receptors is associated with tumor invasion, symptoms, and response to dopamine agonists. Targeting ErbB receptors may be effective therapy in patients with resistant prolactinomas.
Dunham, C. Michael; Hoffman, David A.; Huang, Gregory S.; Omert, Laurel A.; Gemmel, David J.; Merrell, Renee
of preinjury brain atrophy with acute intracranial hemorrhage is a novel finding. Contrary to antithrombotic agent status, admission neurologic abnormality is a predictor of adverse post-admission outcomes. Study findings indicate that effective hemostasis is maintained with antithrombotic therapy. PMID:25279785
Siqueira, Sergio Júnior; Ribeiro, Fernanda Vieira; Villalpando, Karina Teixeira; Cirano, Fabiano Ribeiro; Pimentel, Suzana Peres
Aggressive periodontitis (AgP) is an inflammatory disease characterized by rapid attachment loss and bone destruction. This case report presents the 10-year results in a subject with generalized AgP treated by a regenerative periodontal therapeutic approach and the adjunctive use of antibiotics, following a systematic maintenance periodontal therapy. The use of enamel matrix derivatives (EMD) and adjunctive antibiotic therapy to treat AgP yielded improvements in clinical parameters and radiographic bony fill. This combined therapeutic approach following a systematic supportive periodontal therapy supports the long-term maintenance of teeth with previous advanced periodontal defects, demonstrating successful stability after 10-years follow-up. Clinical Relevance: The combined treatment protocol using EMD plus adjunctive antibiotic therapy, associated with a systematic supportive periodontal therapy, benefits the long-term maintenance of teeth with previous advanced periodontal defects in subjects presenting AgP, supporting this approach as an alternative in the treatment of AgP.
In an effort to develop potent antithrombotic agents, a series of novel 2-aminobenzamide derivatives were synthesized and screened for their in vivo antithrombotic activity. Among the 23 compounds tested, compound (8g) showed the most promising antithrombotic activity, which was comparable with clinically used aspirin or warfarin, but at variance with these standard drugs, 8g did not exhibit the increased bleeding time, suggesting its potential as a novel antithrombotic agent. PMID:24900559
Giraldi, Eugenia; Provenzi, Massimo; Fiocchi, Roberto; Colledan, Michele; Cornelli, Pieremilio; Torre, Giuliano; Rambaldi, Alessandro; Conter, Valentino
Management of aggressive, usually late-occurring, post-transplant lymphoproliferative disorders (PTLDs), a life-threatening complication after solid organ transplants, remains controversial. Four children affected by aggressive CD20+ PTLDs received a chemo-immunotherapy regimen for remission induction based on fludarabine, cyclophosphamide, doxorubicin, and rituximab, associated with a rapid discontinuation of immunosuppression (IS). Subsequent consolidation chemotherapy consisted of Berlin-Frankfurt-Münster-modified blocks. All patients achieved a complete remission, which persisted for 25, 68+, 80+, and 103+ months after diagnosis. Therapy was well tolerated. No patients developed allograft rejection during PTLD treatment. Our experience suggests that this chemo-immunotherapeutic approach may be an effective treatment strategy while allowing for a concomitant discontinuation of IS.
UMEDA, KATSUTSUGU; SAIDA, SATOSHI; YAMAGUCHI, HIDEKI; OKAMOTO, SHINYA; OKAMOTO, TAKESHI; KATO, ITARU; HIRAMATSU, HIDEFUMI; IMAI, TSUYOSHI; KODAIRA, TAKESHI; HEIKE, TOSHIO; ADACHI, SOUICHI; WATANABE, KEN-ICHIRO
Patients with desmoplastic small round cell tumors (DSRCTs) have an extremely poor outcome despite the use of aggressive therapy. The current study presents the case of 16-year-old male with metastatic DSRCT, in which multimodal therapy, including intensive chemotherapies using frequent autologous stem cell support, gross resection of primary and metastatic lesions, and whole abdominopelvic intensity-modulated radiation therapy, was administered. Subsequent to these treatments, there was no evidence of active disease. However, cerebellar and pineal body lesions, and bone metastasis to the left humerus were detected 1 year and 2 months after the initial diagnosis. Combination chemotherapy with irinotecan and temozolomide was initially effective against the central nervous system (CNS) metastatic lesions; however, the patient succumbed due to progressive CNS disease after seven courses of combination chemotherapy. Additional studies are required to accumulate information regarding CNS recurrence of DSRCT. PMID:26870296
Bishnoi, Sandra; Urban, Alexander; Charron, Heather; Mitchell, Tamika; Shea, Martin; Nanda, Sarmistha; Schiff, Rachel; Halas, Naomi; Joshi, Amit
There is an unmet need for efficient near-infrared photothermal transducers for the treatment of highly aggressive cancers and large tumors where the penetration of light can be substantially reduced, and the intra-tumoral nanoparticle transport is restricted due to the presence of hypoxic or nectrotic regions. We report the performance advantages obtained by sub 100 nm gold nanomatryushkas, comprising of concentric gold-silica-gold layers compared to conventional ~150 nm silica core gold nanoshells for photothermal therapy of triple negative breast cancer. We demonstrate that a 33% reduction in silica-core-gold-shell nanoparticle size, while retaining near-infrared plasmon resonance, and keeping the nanoparticle surface charge constant, results in a four to five fold tumor accumulation of nanoparticles following equal dose of injected gold for both sizes. The survival time of mice bearing large (>1000 mm3) and highly aggressive triple negative breast tumors is doubled for the nanomatryushka treatment group under identical photo-thermal therapy conditions. The higher absorption cross-section of a nanomatryoshka results in a higher efficiency of photonic to thermal energy conversion and coupled with 4-5X accumulation within large tumors results in superior therapy efficacy. PMID:25051221
Ayala-Orozco, Ciceron; Urban, Cordula; Bishnoi, Sandra; Urban, Alexander; Charron, Heather; Mitchell, Tamika; Shea, Martin; Nanda, Sarmistha; Schiff, Rachel; Halas, Naomi; Joshi, Amit
There is an unmet need for efficient near-infrared photothermal transducers for the treatment of highly aggressive cancers and large tumors where the penetration of light can be substantially reduced, and the intra-tumoral nanoparticle transport is restricted due to the presence of hypoxic or necrotic regions. We report the performance advantages obtained by sub 100nm gold nanomatryushkas, comprising concentric gold-silica-gold layers compared to conventional ~150nm silica core gold nanoshells for photothermal therapy of triple negative breast cancer. We demonstrate that a 33% reduction in silica-core-gold-shell nanoparticle size, while retaining near-infrared plasmon resonance, and keeping the nanoparticle surface charge constant, results in a four to five fold tumor accumulation of nanoparticles following equal dose of injected gold for both sizes. The survival time of mice bearing large (>1000mm(3)) and highly aggressive triple negative breast tumors is doubled for the nanomatryushka treatment group under identical photo-thermal therapy conditions. The higher absorption cross-section of a nanomatryoshka results in a higher efficiency of photonic to thermal energy conversion and coupled with 4-5× accumulation within large tumors results in superior therapy efficacy.
Shindo, Yuji; Matsumoto, Satohiro; Miyatani, Hiroyuki; Yoshida, Yukio; Mashima, Hirosato
AIM: To evaluate the risk factors for postoperative bleeding after gastric endoscopic submucosal dissection (ESD) based on the latest guidelines. METHODS: A total of 262 gastric neoplasms were treated by ESD at our center during a 2-year period from October 2012. We analyzed the data of these cases retrospectively to identify the risk factors for post-ESD bleeding. RESULTS: Of the 48 (18.3%) cases on antithrombotic treatment, 10 were still receiving antiplatelet drugs perioperatively, 13 were on heparin replacement after oral anticoagulant withdrawal, and the antithrombotic therapy was discontinued perioperatively in 25 cases. Postoperative bleeding occurred in 23 cases (8.8%). The postoperative bleeding rate in the heparin replacement group was 61.5%, significantly higher than that in the non-antithrombotic therapy group (6.1%). Univariate analysis identified history of antithrombotic drug use, heparin replacement, hemodialysis, cardiovascular disease, diabetes mellitus, elevated prothrombin time-international normalized ratio, and low hemoglobin level on admission as risk factors for post ESD bleeding. Multivariate analysis identified only heparin replacement (OR = 13.7, 95%CI: 1.2-151.3, P = 0.0329) as a significant risk factor for post-ESD bleeding. CONCLUSION: Continued administration of antiplatelet agents, based on the guidelines, was not a risk factor for postoperative bleeding after gastric ESD; however, heparin replacement, which is recommended after withdrawal of oral anticoagulants, was identified as a significant risk factor. PMID:27076874
Norman, Michael; Ryan, Lawrence J.
It was hypothesized that male perpetrators of domestic violence in the early stages of a 1-year process of cognitive restructuring therapy would manifest on the Rosenzweig Picture-Frustration Study higher levels of extra-aggressiveness than in later stages of the therapy process. A sample of male batterers in the process of treatment took the…
Chen, Chen; Li, Chun; Wang, Hong; Ou, Jian-Jun; Zhou, Jian-Song; Wang, Xiao-Ping
This 9-week study was designed to determine whether a commercial cognitive-behavioral training program could effectively reduce overt aggression behavior in Chinese young male violent offenders. Sixty-six participants were randomly assigned to receive routine intervention alone (control group) or routine intervention plus Williams LifeSkills Training (WLST group) in a 1:1 ratio. The primary outcome was change scores on the Modified Overt Aggression Scale (MOAS) from baseline to one week following end of training. Secondary outcomes were change scores on the Barratt Impulsiveness Scale-11 (BIS-11) and Cook-Medley Hostility Scale (CMHS). There were significant between-group differences in change of MOAS total score (P < .001) and all sub-scores (Ps < .01) except aggression against property. Between-group differences were also observed in change of BIS-11 and CMHS total score (Ps < 0.05). All results favored the WLST group. These findings suggest WLST has the potential to be an effective intervention to reduce overt aggressive behavior in young male violent offenders.
Consoli, Angele; Cohen, Johan; Bodeau, Nicolas; Guinchat, Vincent; Wachtel, Lee; Cohen, David
Efficacious intervention for severe, treatment-refractory self-injurious behavior and aggression (SIB/AGG) in children and adolescents with intellectual disability and concomitant psychiatric disorders remains a complex and urgent issue. The aim of this study is to assess the efficacy of electroconvulsive therapy (ECT) on severe and treatment-resistant SIB/AGG in young people with intellectual disability and current psychiatric disorder. We reviewed the charts of all patients (N = 4) who received ECT in the context of SIB/AGG with resistance to behavioral interventions, milieu therapy and pharmacotherapy from 2007 to 2011. We scored the daily rate of SIB/AGG per patient for each hospital day. Inter rater reliability was good (intraclass correlations = 0.91). We used a mixed generalized linear model to assess whether the following explanatory variables (time, ECT) influenced the course of SIB/AGG over time, the dependant variable. The sample included two girls and two boys. The mean age at admission was 13.8 years old [range 12-14]. The patients had on average 19 ECT sessions [range 16-26] and one patient received maintenance ECT. There was no effect of time before and after ECT start. ECT was associated with a significant decrease in SIB/AGG scores (p < 0.001): mean aggression score post-ECT was half the pre-ECT value. ECT appears beneficial in severe, treatment-resistant SHBA in adolescents with intellectual disability.
El-Sahwi, Karim S; Schwartz, Peter E; Santin, Alessandro D
Endometrial cancer (EC) is the most common female genital malignancy in the USA. Most carcinomas arising from the uterus are estrogen dependent and are associated with obesity and hypertension. They are designated type I ECs and typically, due to their early diagnosis secondary to postmenopausal bleeding, have a good prognosis. By contrast, type II ECs develop in older patients, are not hormone dependent and are responsible for most recurrences and deaths from EC. Uterine serous cancer constitutes up to 10% of all endometrial tumors, and represents the most biologically aggressive variant of type II EC. This article will describe the most salient molecular markers that have been identified in uterine serous cancer, thus far with emphasis on the use of erbB2 (HER2/neu) as the first of a series of therapeutic markers for the treatment of this highly-aggressive subset of ECs.
Stirbys Md PhD, Petras
Atrial fibrillation is the most prevalent cardiac arrhythmia with a high risk of ischemic stroke. Thromboprophylaxis plays a key role in prevention of cardioembolic and non-cardioembolic events. Oral antithrombotic drugs are most often used to reduce hypercoagulable state. Patients may suffer from both under- and overtreatment compromising the outcomes. Medication peculiarities at large are well-known and widely debated. Non-adherence to antithrombotic drug regimen poses a significant risk of stroke. There is a pressing need for more detailed delineation of risk factors, namely by incorporation of the letter "N" (meaning "Non-adherence to drug therapy") into the well-known risk score alphanumeric display: CHA2DS2N-VASc. Better delineation of risk factors related to antithrombotic treatment as well as those related to treatment for congestive heart failure, hypertension, diabetes are desirable. Similarly, the bleeding risk score formula HAS-BLED might be improved by an additional risk factor, marked as the symbol "E", meaning "Excessive antithrombotic dosing" i.e. HAS-BLEDE. Improved formulas would help raise the predictive scores value and awareness for clinicians facing the problem of non-adherence to treatment regimen. If patients properly followed the prescribed drug therapy regimen it would potentially reveal that we already have ideal or near ideal antithrombotic drug(s). These drugs, herein non-specified, are widely used, but due to non-adherence they are not categorized as the best ones. That is why considerable efforts are focused on continued research and new developments.
Randomised, double-blind trial on the value of tapered discontinuation of clopidogrel maintenance therapy after drug-eluting stent implantation. Intracoronary Stenting and Antithrombotic Regimen: CAUTION in Discontinuing Clopidogrel Therapy--ISAR-CAUTION.
Fiedler, K Anette; Mehilli, Julinda; Kufner, Sebastian; Schlichting, Anna; Ibrahim, Tareq; Sibbing, Dirk; Ott, Ilka; Schunkert, Heribert; Laugwitz, Karl-Ludwig; Kastrati, Adnan; Schulz, Stefanie
There is little evidence on the optimal mode of clopidogrel discontinuation. Epidemiological studies observed clustering of thrombotic events after cessation of chronic clopidogrel therapy. The underlying mechanism has been ascribed to transient platelet hyper-reactivity. Gradual tapering of clopidogrel may have the potential to attenuate this phenomenon. The objective of the present study was to assess whether in patients with drug-eluting stents (DES) gradual discontinuation of clopidogrel maintenance therapy is superior to conventional, abrupt discontinuation. Patients with planned discontinuation of chronic clopidogrel therapy after DES implantation were randomised in a double-blinded fashion to either gradual discontinuation (according to a tapering schema over four weeks) or abrupt discontinuation (after continued clopidogrel therapy for additional four weeks). The primary endpoint was the composite of cardiac death, myocardial infarction, stroke, stent thrombosis, major bleeding or rehospitalisation due to an acute coronary syndrome at 90 days. Enrollment of 3,000 patients was planned. The study was stopped prematurely due to slow recruitment after enrollment of 782 patients. At 90 days, nine of 392 patients (2.3%) with tapered cessation reached the primary endpoint compared to five of 390 patients (1.3%) with abrupt cessation (p=0.284). The composite of death or myocardial infarction occurred in three patients with tapered and three patients with abrupt discontinuation (p=0.764). In conclusion, tapered discontinuation of chronic clopidogrel therapy is not superior to abrupt discontinuation regarding the primary endpoint in this study. However, the results must be interpreted in view of the premature termination of the trial and low event rates.
Optimizing Stroke Prevention in Patients With Atrial Fibrillation: A Cluster-Randomized Controlled Trial of a Computerized Antithrombotic Risk Assessment Tool in Australian General Practice, 2012–2013
Magin, Parker J.; Hilmer, Sarah N.; Krass, Ines
Introduction Clinicians have expressed a need for tools to assist in selecting treatments for stroke prevention in patients with atrial fibrillation. The objective of this study was to evaluate the impact of a computerized antithrombotic risk assessment tool (CARAT) on general practitioners’ prescribing of antithrombotics for patients with atrial fibrillation. Methods A prospective, cluster-randomized controlled trial was conducted in 4 regions (in rural and urban settings) of general practice in New South Wales, Australia (January 2012–June 2013). General practitioner practices were assigned to an intervention arm (CARAT) or control arm (usual care). Antithrombotic therapy prescribing was assessed before and after application of CARAT. Results Overall, the antithrombotic therapies for 393 patients were reviewed by 48 general practitioners; we found no significant baseline differences in use of antithrombotics between the control arm and intervention arm. Compared with control patients, intervention patients (n = 206) were 3.1 times more likely to be recommended warfarin therapy (over any other treatment option; P < .001) and 2.8 times more likely to be recommended any anticoagulant (in preference to antiplatelet; P = .02). General practitioners agreed with most (75.2%) CARAT recommendations; CARAT recommended that 75 (36.4%) patients change therapy. After application of CARAT, the proportion of patients receiving any antithrombotic therapy was unchanged from baseline (99.0%); however, anticoagulant use increased slightly (from 89.3% to 92.2%), and antiplatelet use decreased (from 9.7% to 6.8%). Conclusion Tools such as CARAT can assist clinicians in selecting antithrombotic therapies, particularly in upgrading patients from antiplatelets to anticoagulants. However, the introduction of novel oral anticoagulants has complicated the decision-making process, and tools must evolve to weigh the risks and benefits of these new therapy options. PMID:27418212
Gopal, Satish; Fedoriw, Yuri; Kaimila, Bongani; Montgomery, Nathan D.; Kasonkanji, Edwards; Moses, Agnes; Nyasosela, Richard; Mzumara, Suzgo; Varela, Carlos; Chikasema, Maria; Makwakwa, Victor; Itimu, Salama; Tomoka, Tamiwe; Kamiza, Steve; Dhungel, Bal M.; Chimzimu, Fred; Kampani, Coxcilly; Krysiak, Robert; Richards, Kristy L.; Shea, Thomas C.; Liomba, N. George
There are no prospective studies of aggressive non-Hodgkin lymphoma (NHL) treated with CHOP in sub-Saharan Africa. We enrolled adults with aggressive NHL in Malawi between June 2013 and May 2015. Chemotherapy and supportive care were standardized, and HIV+ patients received antiretroviral therapy (ART). Thirty-seven of 58 patients (64%) were HIV+. Median age was 47 years (IQR 39–56), and 35 (60%) were male. Thirty-five patients (60%) had stage III/IV, 43 (74%) B symptoms, and 28 (48%) performance status ≥2. B-cell NHL predominated among HIV+ patients, and all T-cell NHL occurred among HIV- individuals. Thirty-one HIV+ patients (84%) were on ART for a median 9.9 months (IQR 1.1–31.7) before NHL diagnosis, median CD4 was 121 cells/μL (IQR 61–244), and 43% had suppressed HIV RNA. HIV+ patients received a similar number of CHOP cycles compared to HIV- patients, but more frequently developed grade 3/4 neutropenia (84% vs 31%, p = 0.001), resulting in modestly lower cyclophosphamide and doxorubicin doses with longer intervals between cycles. Twelve-month overall survival (OS) was 45% (95% CI 31–57%). T-cell NHL (HR 3.90, p = 0.017), hemoglobin (HR 0.82 per g/dL, p = 0.017), albumin (HR 0.57 per g/dL, p = 0.019), and IPI (HR 2.02 per unit, p<0.001) were associated with mortality. HIV was not associated with mortality, and findings were similar among patients with diffuse large B-cell lymphoma. Twenty-three deaths were from NHL (12 HIV+, 11 HIV-), and 12 from CHOP (9 HIV+, 3 HIV-). CHOP can be safe, effective, and feasible for aggressive NHL in Malawi with and without HIV. PMID:26934054
Pauli, Chantal; Fuchs, Bruno; Pfirrmann, Christian; Bridge, Julia A; Hofer, Silvia; Bode, Beata
Aneurysmal bone cyst (ABC), once considered a reactive lesion, has been proven to be a neoplasia characterized by rearrangements of the USP6-gene. Aggressive local growth and recurrences are common and therapeutic options may be limited due to the vicinity of crucial structures. We describe a case of a locally aggressive, multinucleated giant cell-containing lesion of the forearm of a 21-year old woman, treated with denosumab for recurrent, surgically uncontrollable disease. Under the influence of this RANKL inhibitor, the tumor showed a marked reduction of the content of the osteoclastic giant cells and an extensive metaplastic osteoid production leading to the bony containment, mostly located intracortically in the proximal radius. The diagnosis of a periosteal ABC was confirmed by FISH demonstrating USP6 gene rearrangement on the initial biopsy. Function conserving surgery could be performed, enabling reconstruction of the affected bone. Inhibition of RANKL with denosumab may offer therapeutic option for patients not only with giant cell tumors but also with ABCs.
Tseng, Yolanda D.; Chen, Yu-Hui; Catalano, Paul J.; Ng, Andrea
Purpose: To evaluate the response rate (RR) and time to local recurrence (TTLR) among patients who received salvage radiation therapy for relapsed or refractory aggressive non-Hodgkin lymphoma (NHL) and investigate whether RR and TTLR differed according to disease characteristics. Methods and Materials: A retrospective review was performed for all patients who completed a course of salvage radiation therapy between January 2001 and May 2011 at Brigham and Women's Hospital/Dana-Farber Cancer Institute. Separate analyses were conducted for patients treated with palliative and curative intent. Predictors of RR for each subgroup were assessed using a generalized estimating equation model. For patients treated with curative intent, local control (LC) and progression-free survival were estimated with the Kaplan-Meier method; predictors for TTLR were evaluated using a Cox proportional hazards regression model. Results: Salvage radiation therapy was used to treat 110 patients to 121 sites (76 curative, 45 palliative). Salvage radiation therapy was given as part of consolidation in 18% of patients treated with curative intent. Median dose was 37.8 Gy, with 58% and 36% of curative and palliative patients, respectively, receiving 39.6 Gy or higher. The RR was high (86% curative, 84% palliative). With a median follow-up of 4.8 years among living patients, 5-year LC and progression-free survival for curative patients were 66% and 34%, respectively. Refractory disease (hazard ratio 3.3; P=.024) and lack of response to initial chemotherapy (hazard ratio 4.3; P=.007) but not dose (P=.93) were associated with shorter TTLR. Despite doses of 39.6 Gy or higher, 2-year LC was only 61% for definitive patients with refractory disease or disease that did not respond to initial chemotherapy. Conclusions: Relapsed or refractory aggressive NHL is responsive to salvage radiation therapy, and durable LC can be achieved in some cases. However, refractory disease is associated with a shorter
Norman, Michael; Ryan, Lawrence J
It was hypothesized that male perpetrators of domestic violence in the early stages of a 1-year process of cognitive restructuring therapy would manifest on the Rosenzweig Picture-Frustration Study higher levels of extra-aggressiveness than in later stages of the therapy process. A sample of male batterers in the process of treatment took the Rosenzweig instrument. The resulting responses were rated by trained scorers. Chi-square calculations revealed that batterers in the first quarter of treatment manifested Rosenzweig responses indicative of extra-aggressiveness, whereas in the fourth quarter, batterers manifested Rosenzweig responses indicative of im-aggression. The data are discussed relative to implications for domestic violence treatment and the use of the Rosenzweig instrument as an index of treatment progress.
Woo, Y Joseph
The widespread application of antithrombotic agents carries significant potential for inducing excessive peri-operative hemorrhage during cardiac surgery. Specific surgical and medical strategies can be employed to attenuate this bleeding. These antithrombotic agents and anti-hemorrhagic measures will be reviewed in depth.
Carty, F; Mahon, B P; English, K
Mesenchymal stromal cells (MSC) have emerged as promising cell therapies for multiple conditions based on demonstrations of their potent immunomodulatory and regenerative capacities in models of inflammatory disease. Understanding the effects of MSC on T cells has dominated the majority of work carried out in this field to date; recently, however, a number of studies have shown that the therapeutic effect of MSC requires the presence of macrophages. It is timely to review the mechanisms and manner by which MSC modulate macrophage populations in order to design more effective MSC therapies and clinical studies. A complex cross-talk exists through which MSC and macrophages communicate, a communication that is not controlled exclusively by MSC. Here, we examine the evidence that suggests that MSC not only respond to inflammatory macrophages and adjust their secretome accordingly, but also that macrophages respond to encounters with MSC, creating a feedback loop which contributes to the immune regulation observed following MSC therapy. Future studies examining the effects of MSC on macrophages should consider the antagonistic role that macrophages play in this exchange.
Ferrara, Fortunato; Staquicini, Daniela I; Driessen, Wouter H P; D'Angelo, Sara; Dobroff, Andrey S; Barry, Marc; Lomo, Lesley C; Staquicini, Fernanda I; Cardó-Vila, Marina; Soghomonyan, Suren; Alauddin, Mian M; Flores, Leo G; Arap, Marco A; Lauer, Richard C; Mathew, Paul; Efstathiou, Eleni; Aparicio, Ana M; Troncoso, Patricia; Navone, Nora M; Logothetis, Christopher J; Marchiò, Serena; Gelovani, Juri G; Sidman, Richard L; Pasqualini, Renata; Arap, Wadih
Aggressive variant prostate cancers (AVPC) are a clinically defined group of tumors of heterogeneous morphologies, characterized by poor patient survival and for which limited diagnostic and treatment options are currently available. We show that the cell surface 78-kDa glucose-regulated protein (GRP78), a receptor that binds to phage-display-selected ligands, such as the SNTRVAP motif, is a candidate target in AVPC. We report the presence and accessibility of this receptor in clinical specimens from index patients. We also demonstrate that human AVPC cells displaying GRP78 on their surface could be effectively targeted both in vitro and in vivo by SNTRVAP, which also enabled specific delivery of siRNA species to tumor xenografts in mice. Finally, we evaluated ligand-directed strategies based on SNTRVAP-displaying adeno-associated virus/phage (AAVP) particles in mice bearing MDA-PCa-118b, a patient-derived xenograft (PDX) of castration-resistant prostate cancer bone metastasis that we exploited as a model of AVPC. For theranostic (a merging of the terms therapeutic and diagnostic) studies, GRP78-targeting AAVP particles served to deliver the human Herpes simplex virus thymidine kinase type-1 (HSVtk) gene, which has a dual function as a molecular-genetic sensor/reporter and a cell suicide-inducing transgene. We observed specific and simultaneous PET imaging and treatment of tumors in this preclinical model of AVPC. Our findings demonstrate the feasibility of GPR78-targeting, ligand-directed theranostics for translational applications in AVPC.
Usin, María M; Tabares, Sandra M; Menso, Julieta; de Albera, Estela R; Sembaj, Adela
The aim of this study was to determine the variations in periodontal parameters and microbiological composition in periodontal pockets at the baseline and 3 and 6 months post treatmentin patients with Generalized Aggressive Periodontitis(GAP) undergoing non surgical periodontal treatment combined with chlorhexidine and systemic antibiotics. Medical and dental history was taken from 10 subjects, average age 30.6±2.7 years, diagnosed with GAP. A non surgical periodontal treatment combined with 0.12% chlorhexidine, 875 mg amoxicillin and 500 mg metronidazole every 12 hours for ten days was conducted. At each visit, the following measurements wererecorded: bacterial plaque (BP), bleeding on probing (BOP), probing depth (PD), clinical attachment level (CAL), hypermobility, and furcation lesions, and a sample of subgingivalplaque was taken from the site of the deepest probing depth of each sextant to identify Porphyromonas gingivalis, Treponemadenticola, Tannerella forsythia, Prevotella intermedia and Aggregatibacter actinomycetemcomitans using molecular biology techniques. After 6 months, the Wilcoxon test showed an increase of 0.97 mm in CAL (p=0.0047) and 2.54 mm in PD(p=0.009). A healthy site was defined as having a PD <5 mm, negative BOP and no pathogenic bacteria detected at 6 months, indicating significant improvement (p=0.008), with OR (95%CI) =4.7 (1.102220.11).With the treatment protocol used in this study, 6 months after treatment, patients had an approximately 4- fold higher possibility of presenting PD <5 mm and periodontal pockets without periodontal pathogenic bacteria.
Ferrara, Fortunato; Staquicini, Daniela I.; Driessen, Wouter H. P.; D’Angelo, Sara; Dobroff, Andrey S.; Barry, Marc; Lomo, Lesley C.; Staquicini, Fernanda I.; Cardó-Vila, Marina; Soghomonyan, Suren; Alauddin, Mian M.; Flores, Leo G.; Arap, Marco A.; Lauer, Richard C.; Mathew, Paul; Efstathiou, Eleni; Aparicio, Ana M.; Troncoso, Patricia; Navone, Nora M.; Logothetis, Christopher J.; Marchiò, Serena; Gelovani, Juri G.; Sidman, Richard L.; Pasqualini, Renata; Arap, Wadih
Aggressive variant prostate cancers (AVPC) are a clinically defined group of tumors of heterogeneous morphologies, characterized by poor patient survival and for which limited diagnostic and treatment options are currently available. We show that the cell surface 78-kDa glucose-regulated protein (GRP78), a receptor that binds to phage-display-selected ligands, such as the SNTRVAP motif, is a candidate target in AVPC. We report the presence and accessibility of this receptor in clinical specimens from index patients. We also demonstrate that human AVPC cells displaying GRP78 on their surface could be effectively targeted both in vitro and in vivo by SNTRVAP, which also enabled specific delivery of siRNA species to tumor xenografts in mice. Finally, we evaluated ligand-directed strategies based on SNTRVAP-displaying adeno-associated virus/phage (AAVP) particles in mice bearing MDA-PCa-118b, a patient-derived xenograft (PDX) of castration-resistant prostate cancer bone metastasis that we exploited as a model of AVPC. For theranostic (a merging of the terms therapeutic and diagnostic) studies, GRP78-targeting AAVP particles served to deliver the human Herpes simplex virus thymidine kinase type-1 (HSVtk) gene, which has a dual function as a molecular-genetic sensor/reporter and a cell suicide-inducing transgene. We observed specific and simultaneous PET imaging and treatment of tumors in this preclinical model of AVPC. Our findings demonstrate the feasibility of GPR78-targeting, ligand-directed theranostics for translational applications in AVPC. PMID:27791181
Schmidt, Linnea Boegeskov; Goertz, Sanne; Wohlfahrt, Jan; Melbye, Mads; Munch, Tina Noergaard
Background Intracerebral hemorrhage (ICH) is a disease with high mortality and a substantial risk of recurrence. However, the recurrence risk is poorly documented and the knowledge of potential predictors for recurrence among co-morbidities and medicine with antithrombotic effect is limited. Objectives 1) To estimate the short- and long-term cumulative risks of recurrent intracerebral hemorrhage (ICH). 2) To investigate associations between typical comorbid diseases, surgical treatment, use of medicine with antithrombotic effects, including antithrombotic treatment (ATT), selective serotonin reuptake inhibitors (SSRI’s), and nonsteroidal anti-inflammatory drugs (NSAID’s) with recurrent ICH. Methods The cohort consisted of all individuals diagnosed with a primary ICH in Denmark 1996–2011. Information on comorbidities, surgical treatment for the primary ICH, and the use of ATT, SSRI’s and NSAID’s was retrieved from the Danish national health registers. The cumulative recurrence risk of ICH was estimated using the Aalen-Johansen estimator, thus taking into account the competing risk of death. Associations with potential predictors of recurrent ICH were estimated as rate ratios (RR’s) using Poisson regression. Propensity score matching was used for the analyses of medicine with antithrombotic effects. Results Among 15,270 individuals diagnosed with a primary ICH, 2,053 recurrences were recorded, resulting in cumulative recurrence risk of 8.9% after one year and 13.7% after five years. Surgical treatment and renal insufficiency were associated with increased recurrence risks (RR 1.64, 95% CI 1.39–1.93 and RR 1.72, 95% CI 1.34–2.17, respectively), whereas anti-hypertensive treatment was associated with a reduced risk (RR 0.82, 95% CI 0.74–0.91). We observed non-significant associations between the use of any of the investigated medicines with antithrombotic effect (ATT, SSRI’s, NSAID’s) and recurrent ICH. Conclusions The substantial short-and long
Hoogsteder, Larissa M; van Horn, Joan E; Stams, Geert Jan J M; Wissink, Inge B; Hendriks, Jan
Responsive-Aggression Regulation Therapy (Re-ART) Outpatient is a cognitive behavioral-based intervention for adolescents and young adults (16-24 years) with severe aggressive behavioral problems. This pilot study (N = 26) examined the level of program integrity (PI; that is, the delivery of the intervention as it is originally intended) of Re-ART. We also investigated the pre- and post-test changes in several outcome variables, and the relation between the level of PI and these changes. Participants were recruited from three different outpatient forensic settings. Results showed that the PI of half of the treatments was not sufficient (e.g., the intensity of the program was too low and some standard modules were not offered). In addition, this pilot study demonstrated that sufficient PI was related to positive changes in aggression, cognitive distortions, social support, coping (reported by therapist), and distrust (responsiveness to treatment).
Subbiah, Vivek; Hess, Kenneth R.; Khawaja, Muhammad Rizwan; Wagner, Michael J.; Tang, Chad; Naing, Aung; Fu, Siqing; Janku, Filip; Piha-Paul, Sarina; Tsimberidou, Apostolia M.; Herzog, Cynthia E.; Ludwig, Joseph A.; Patel, Shreyaskumar; Ravi, Vinod; Benjamin, Robert S.; Meric-Bernstam, Funda; Hong, David S.
Prognosis of patients with advanced sarcoma after progression from FDA approved therapies remains grim. In this study, clinical outcomes of 100 patients with advanced sarcoma who received treatment on novel targeted therapy trials were evaluated. Outcomes of interest included best response, clinical benefit rate, progression-free survival (PFS) and overall survival (OS). Median patient age was 48 years (range 14–80). Patients had received a median of 2 prior lines of systemic treatment. Phase I treatments were anti-VEGF–based (n = 45), mTOR inhibitor–based (n = 15), and anti-VEGF + mTOR inhibitor–based (n = 17) or involved other targets (n = 23). Best responses included partial response (n = 4) and stable disease (n = 57). Clinical benefit rate was 36% (95% confidence interval 27–46%). Median OS was 9.6 months (95% Confidence Interval 8.1–14.2); median PFS was 3.5 months (95% Confidence Interval 2.4–4.7). RMH prognostic score of 2 or 3 was associated with lower median OS (log-rank p-value < 0.0001) and PFS (log-rank p-value 0.0081). Receiving cytotoxic chemotherapy as part of phase I trial was also associated with shorter median OS (log-rank p-value 0.039). Patients with advanced sarcoma treated on phase I clinical trials had a clinical benefit rate of 36% and RMH score predicted survival. PMID:27748430
Dal Pra, Alan; Locke, Jennifer A.; Borst, Gerben; Supiot, Stephane; Bristow, Robert G.
Radiation therapy (RT) is one of the mainstay treatments for prostate cancer (PCa). The potentially curative approaches can provide satisfactory results for many patients with non-metastatic PCa; however, a considerable number of individuals may present disease recurrence and die from the disease. Exploiting the rich molecular biology of PCa will provide insights into how the most resistant tumor cells can be eradicated to improve treatment outcomes. Important for this biology-driven individualized treatment is a robust selection procedure. The development of predictive biomarkers for RT efficacy is therefore of utmost importance for a clinically exploitable strategy to achieve tumor-specific radiosensitization. This review highlights the current status and possible opportunities in the modulation of four key processes to enhance radiation response in PCa by targeting the: (1) androgen signaling pathway; (2) hypoxic tumor cells and regions; (3) DNA damage response (DDR) pathway; and (4) abnormal extra-/intracell signaling pathways. In addition, we discuss how and which patients should be selected for biomarker-based clinical trials exploiting and validating these targeted treatment strategies with precision RT to improve cure rates in non-indolent, localized PCa. PMID:26909338
Pereira, Rebeca Cristina Costa; Lourenço, André Luiz; Terra, Luciana; Abreu, Paula Alvarez; Laneuville Teixeira, Valéria; Castro, Helena Carla
Thrombosis related diseases are among the main causes of death and incapacity in the world. Despite the existence of antithrombotic agents available for therapy, they still present adverse effects like hemorrhagic risks which justify the search for new options. Recently, pachydictyol A, isopachydictyol A, and dichotomanol, three diterpenes isolated from Brazilian marine brown alga Dictyota menstrualis were identified as potent antithrombotic molecules through inhibition of thrombin, a key enzyme of coagulation cascade and a platelet agonist. Due to the biotechnological potential of these marine metabolites, in this work we evaluated their binding mode to thrombin in silico and identified structural features related to the activity in order to characterize their molecular mechanism. According to our theoretical studies including structure-activity relationship and molecular docking analysis, the highest dipole moment, polar surface area, and lowest electronic density of dichotomanol are probably involved in its higher inhibition percentage towards thrombin catalytic activity compared to pachydictyol A and isopachydictyol A. Interestingly, the molecular docking studies also revealed a good shape complementarity of pachydictyol A and isopachydictyol A and interactions with important residues and regions (e.g., H57, S195, W215, G216, and loop-60), which probably justify their thrombin inhibitor effects demonstrated in vitro. Finally, this study explored the structural features and binding mode of these three diterpenes in thrombin which reinforced their potential to be further explored and may help in the design of new antithrombotic agents. PMID:28335516
Pereira, Rebeca Cristina Costa; Lourenço, André Luiz; Terra, Luciana; Abreu, Paula Alvarez; Laneuville Teixeira, Valéria; Castro, Helena Carla
Thrombosis related diseases are among the main causes of death and incapacity in the world. Despite the existence of antithrombotic agents available for therapy, they still present adverse effects like hemorrhagic risks which justify the search for new options. Recently, pachydictyol A, isopachydictyol A, and dichotomanol, three diterpenes isolated from Brazilian marine brown alga Dictyota menstrualis were identified as potent antithrombotic molecules through inhibition of thrombin, a key enzyme of coagulation cascade and a platelet agonist. Due to the biotechnological potential of these marine metabolites, in this work we evaluated their binding mode to thrombin in silico and identified structural features related to the activity in order to characterize their molecular mechanism. According to our theoretical studies including structure-activity relationship and molecular docking analysis, the highest dipole moment, polar surface area, and lowest electronic density of dichotomanol are probably involved in its higher inhibition percentage towards thrombin catalytic activity compared to pachydictyol A and isopachydictyol A. Interestingly, the molecular docking studies also revealed a good shape complementarity of pachydictyol A and isopachydictyol A and interactions with important residues and regions (e.g., H57, S195, W215, G216, and loop-60), which probably justify their thrombin inhibitor effects demonstrated in vitro. Finally, this study explored the structural features and binding mode of these three diterpenes in thrombin which reinforced their potential to be further explored and may help in the design of new antithrombotic agents.
Stitham, J; Vanichakarn, P; Ying, L; Hwa, J
The use of antithrombotic agents, particularly antiplatelet drugs like aspirin and clopidogrel, has been instrumental in decreasing the risk for adverse cardiovascular events across a wide range of patients. However, despite the established benefits, the use of these medications remains suboptimal. There is a high degree of inter-individual variation in response to these treatments, whereby patients experience occlusive thromboembolic events, in spite of maintaining an appropriate treatment regimen. This has lead to the notion of antithrombotic "resistance" or "poor responders", which has been a growing concern amongst clinicians and other healthcare providers. Compounding this matter even further, reports of increased cardiovascular risk associated with the use of non-steroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen and naproxen, have revealed additional and unforeseen contributors to myocardial infarction and stroke. With all medications, striking a balance between the potential risks and benefits seems more art than science at times. However, given their widespread use and critical cardiovascular implications, further emphasis has been placed on understanding factors influencing antithrombotic and NSAID therapies. A major aim in cardiovascular pharmacogenetics is the discovery of genetic biomarkers that will allow for prospective screening and individualized prediction of drug efficacy and adverse reactions for these medications (both alone and together) within the context of cardiovascular disease.
Cassiello-Robbins, Clair; Conklin, Laren R.; Anakwenze, Ujunwa; Gorman, Jack M.; Woods, Scott W.; Shear, M. Katherine; Barlow, David H.
Background Previous research suggests that patients with panic disorder exhibit higher levels of aggression than patients with other anxiety disorders. This aggression is associated with more severe symptomatology and interpersonal problems. However, few studies have examined whether higher levels of aggression are associated with a worse treatment response in this population. Methods The present study sought to examine the association of aggression with panic disorder symptom severity in a sample of 379 patients who participated in a trial examining long-term strategies for the treatment of panic disorder. Results We found that aggression was significantly associated with higher baseline levels of panic disorder symptoms, anxiety, depression, and functional impairment. Further, we found that patients higher in aggression did not achieve the same level of improvement in general anxiety symptoms during treatment compared to patients lower in aggression, even when controlling for baseline anxiety symptom severity. Conclusion These results suggest that more research is needed concerning patients with anxiety disorders with higher aggression, as they may be a group in need of additional treatment considerations. PMID:25987198
Sarkar, Indranil; Rajan, Padma; Pai, Jagdish; Malagi, Sachin; Bharmappa, Radhika; Kamath, Vinesh
Introduction Aggressive periodontitis comprises a group of rare, severe, rapidly progressive form of periodontitis. Conventional treatment includes mechanical debridement augmented with adjunctive antimicrobial therapy. Development of antibiotic resistance has led to use of lasers. Photodynamic therapy (PDT) is a novel non-invasive therapeutic approach with increased site and pathogen specificity. This study compares PDT and Lasers as an adjunct to conventional Scaling in the treatment of patients with aggressive periodontitis. Materials and Methods Fifteen untreated aggressive periodo-ntitis patients were randomly assigned in a split mouth design for one of the following treatment modalities: 1) SRP alone; (2) SRP + Diode Laser irradiation with 810 nm at 1W, continuous mode for 30 sec per tooth; (3) SRP + PDT on “0” day; (4) SRP + PDT on “0”, 7th and 21st day. The clinical parameters included PI, BOP, PPD, CAL recorded at the baseline & 3rd month. The site with greatest probing pocket depth (PPD) was selected from each quadrant for bacterial sampling and cultured for Aggregatibacter actinomycetemcomitans and Porphyromonas gingivalis & Prevotella intermedia. Results Statistically significant reduction in clinical & microbial parameters was seen. Sites 4 showed a greater reduction compared to other groups. Conclusion Photodynamic therapy is a valuable treatment modality adjunctive to conventional scaling and root planing. PMID:27042576
Zheng, Hua-chuan; Li, Jing; Shen, Dao-fu; Yang, Xue-feng; Zhao, Shuang; Wu, Ya-zhou; Takano, Yasuo; Sun, Hong-zhi; Su, Rong-jian; Luo, Jun-sheng; Gou, Wen-feng
Here, we found that BTG1 overexpression inhibited proliferation, migration and invasion, induced G2/M arrest, differentiation, senescence and apoptosis in BGC-823 and MKN28 cells (p < 0.05). BTG1 transfectants showed a higher mRNA expression of Cyclin D1 and Bax, but a lower mRNA expression of cdc2, p21, mTOR and MMP-9 than the control and mock (p < 0.05). After treated with cisplatin, MG132, paclitaxel and SAHA, both BTG1 transfectants showed lower mRNA viability and higher apoptosis than the control in both time- and dose-dependent manners (p < 0.05) with the hypoexpression of chemoresistance-related genes (slug, CD147, GRP78, GRP94, FBXW7 TOP1, TOP2 and GST-π). BTG1 expression was restored after 5-aza-2'-deoxycytidine treatment in gastric cancer cells. BTG1 expression was statistically lower in gastric cancer than non-neoplastic mucosa and metastatic cancer in lymph node (p < 0.05). BTG1 expression was positively correlated with depth of invasion, lymphatic and venous invasion, lymph node metastasis, TNM staging and worse prognosis (p < 0.05). The diffuse-type carcinoma showed less BTG1 expression than intestinal- and mixed-type ones (p < 0.05). BTG1 overexpression suppressed tumor growth and lung metastasis of gastric cancer cells by inhibiting proliferation, enhancing autophagy and apoptosis in xenograft models. It was suggested that down-regulated BTG1 expression might promote gastric carcinogenesis partially due to its promoter methylation. BTG1 overexpression might reverse the aggressive phenotypes and be employed as a potential target for gene therapy of gastric cancer.
Tiwari, Deviprasad; Nayak, Brusabhanu; Seth, Amlesh
Primary signet ring cell carcinoma (SRCC) of the prostate is a rare entity, characterised by its aggressive nature and dismal prognosis. We report a case of an advanced SRCC of the prostate presenting as a large pelvic mass with obstructive uropathy and rectal involvement managed by complete androgen blockade. At 24 months follow-up, the patient has no evidence of progression or metastasis. Aggressive management with multimodality approach combining surgery, radiation and hormonal ablation can result in long disease-free survival in some patients, despite the aggressive nature of this disease.
Nijenhuis, Vincent J; Bennaghmouch, Naoual; van Kuijk, Jan-Peter; Capodanno, Davide; ten Berg, Jurriën M
Transcatheter aortic valve implantation (TAVI) is an established treatment option for symptomatic patients with severe aortic valvular disease who are not suitable for conventional surgical aortic valve replacement. Despite improving experience and techniques, ischaemic and bleeding complications after TAVI remain prevalent and impair survival in this generally old and comorbid-rich population. Due to changing aetiology of complications over time, antiplatelet and anticoagulant therapy after TAVI should be carefully balanced. Empirically, a dual antiplatelet strategy is generally used after TAVI for patients without an indication for oral anticoagulation (OAC; e. g. atrial fibrillation, mechanical mitral valve prosthesis), including aspirin and a thienopyridine. For patients on OAC, a combination of OAC and aspirin or thienopyridine is generally used. This review shows that current registries are unfit to directly compare antithrombotic regimens. Small exploring studies suggest that additional clopidogrel after TAVI only affects bleeding and not ischemic complications. However, these studies are lack in quality in terms of Cochrane criteria. Currently, three randomised controlled trials are recruiting to gather more knowledge about the effects of clopidogrel after TAVI.
Madsen, Christian Medom; Jantzen, Christopher; Lauritzen, Jes Bruun; Abrahamsen, Bo; Jorgensen, Henrik L
Background and purpose Currently, no clear evidence exists on the pattern of use of antithrombotics at admission in hip fracture patients and how this has changed over time. We investigated temporal trends in—and factors associated with—the use of antithrombotics in patients admitted with a fractured hip. Patients and methods This was a population-based cohort study including all patients aged 18 years or above who were admitted with a hip fracture in Denmark from 1996 to 2012. The Danish national registries were used to collect information on medication use, vital status, and comorbidity. Results From 1996 to 2012, the proportion of patients using antithrombotics in general increased by a factor of 2.3 from 19% to 43% (p < 0.001). More specifically, the use of anticoagulants increased by a factor of 6.8 and the use of antiplatelets increased by a factor of 2.1. When we adjusted for possible confounders, the use of antithrombotics still increased for every calendar year (relative risk (RR) = 1.03, CI: 1.03–1.04; p < 0.001). Age, sex, and Charlson comorbidity index were all associated with the use of antithrombotics (all p < 0.001). Interpretation The proportion of hip fracture patients using antithrombotics at admission has increased substantially in Denmark over the last 2 decades. This highlights the need for evidence-based guidelines on how to handle patients using antithrombotics to ensure safe surgery and to avoid surgical delay. PMID:27301556
Le Heuzey, J Y
The incidence and prevalence of atrial fibrillation are quickly increasing, mainly due to the ageing of the population. Atrial fibrillation is, to date, a problem of public health. Atrial fibrillation is associated to a five-fold risk of stroke, which may be identified by score risks, such as CHADS(2) score. The classical antithrombotic treatment of atrial fibrillation is based on vitamin K antagonists. Trials made in the 90's have clearly shown that vitamin K antagonists were able to decrease stroke risk by about 60%. New oral anticoagulants are now available on the market to treat patients with atrial fibrillation. These drugs are dabigatran which has demonstrated an interest in the RE-LY trial. Two doses may be prescribed, 110 mg bid and 150 mg bid. Anti Xa have also demonstrated an interest : rivaroxaban in the ROCKET AF trial and apixaban in the AVERROES (versus aspirin) and ARISTOTLE trials. In the future these drugs will have a major place in the armamentarium used to treat patients with atrial fibrillation. In all these trials a decrease in intra cranial haemorrhages has been demonstrated. In the everyday practice it will be necessary to be very cautious in patients with impaired renal function, as all these drugs are eliminated by kidneys.
Kinugasa, Chifumi; Naemura, Aki; Hyodo, Kanae; Nakai, Yoshiki; Katsuta, Masumi; Yamamoto, Junichiro
Prevention of arterial thrombotic diseases has a high priority in developed countries. An inappropriate diet is known to enhance the risks for acute thrombotic events, and nutritional products experimentally shown to be antithrombotic, might contribute beneficial effects. The present study forms part of a series of investigations into the antithrombotic effect of various foods and vegetables. Roasted and crushed whole grains from six varieties of sesame seeds were added to the diet of mice. Antithrombotic activity was measured in the carotid artery in vivo, using a He-Ne laser-induced thrombosis technique after 12 weeks. Col/Chichibu/Maruteru-2/1995 and T016 varieties showed significant antithrombotic activity, whilst 00037803 was prothrombotic. The acute effects of purified ingredients, sesamin, sesamolin and sesamol, given orally or intra-arterially, were also examined after a single dose. The most effective ingredient was sesamol, followed by sesamolin and sesamin. Daily intake of specific antithrombotic sesame whole grains or purified active ingredients might help to prevent atherothrombotic diseases.
Hohmann, Carina; Eickhoff, Christiane; Kaemmerer, Wolfgang; Schulz, Martin
Despite the existence of antithrombotic guidelines, there is low compliance with these guidelines in clinical practice. Until now pharmacy interns (PIs) have not been involved in this process. The objectives were to involve PIs to evaluate compliance with antithrombotic guidelines for VTE prophylaxis in surgery patients, and in cases of noncompliance to carry out pharmaceutical interventions. The study was conducted in 7 hospitals in Germany involving 27 PIs within the project "Pharmacy interns on the ward" (P-STAT 2). Pharmacy interns determined the thromboembolic risk, documented antithrombotic medication, and checked the compliance with current antithrombotic guidelines. A total of 6491 patients were enrolled; 5695 patients received antithrombotic prophylaxis. Antithrombotic guideline was followed in 77.5% patients. Many patients are not receiving appropriate VTE prophylaxis or heparin bridging regimen despite the fact that evidence-based antithrombotic guidelines are available. Pharmacy interns may play an important role in antithrombotic management.
Perioperative management of antithrombotic treatment during implantation or revision of cardiac implantable electronic devices: the European Snapshot Survey on Procedural Routines for Electronic Device Implantation (ESS-PREDI).
Deharo, Jean-Claude; Sciaraffia, Elena; Leclercq, Christophe; Amara, Walid; Doering, Michael; Bongiorni, Maria G; Chen, Jian; Dagres, Nicolaus; Estner, Heidi; Larsen, Torben B; Johansen, Jens B; Potpara, Tatjana S; Proclemer, Alessandro; Pison, Laurent; Brunet, Caroline; Blomström-Lundqvist, Carina
The European Snapshot Survey on Procedural Routines for Electronic Device Implantation (ESS-PREDI) was a prospective European survey of consecutive adults who had undergone implantation/surgical revision of a cardiac implantable electronic device (CIED) on chronic antithrombotic therapy (enrolment March-June 2015). The aim of the survey was to investigate perioperative treatment with oral anticoagulants and antiplatelets in CIED implantation or surgical revision and to determine the incidence of complications, including clinically significant pocket haematomas. Information on antithrombotic therapy before and after surgery and bleeding and thromboembolic complications occurring after the intervention was collected at first follow-up. The study population comprised 723 patients (66.7% men, 76.9% aged ≥66 years). Antithrombotic treatment was continued during surgery in 489 (67.6%) patients; 6 (0.8%) had their treatment definitively stopped; 46 (6.4%) were switched to another antithrombotic therapy. Heparin bridging was used in 55 out of 154 (35.8%) patients when interrupting vitamin K antagonist (VKA) treatment. Non-vitamin K oral anticoagulant (NOAC) treatment was interrupted in 88.7% of patients, with heparin bridging in 25.6%, but accounted for only 25.3% of the oral anticoagulants used. A total of 108 complications were observed in 98 patients. No intracranial haemorrhage or embolic events were observed. Chronic NOAC treatment before surgery was associated with lower rates of minor pocket haematoma (1.4%; P= 0.042) vs. dual antiplatelet therapy (13.0%), VKA (11.4%), VKA + antiplatelet (9.2%), or NOAC + antiplatelet (7.7%). Similar results were observed for bleeding complications (P= 0.028). Perioperative management of patients undergoing CIED implantation/surgical revision while on chronic antithrombotic therapy varies, with evidence of a disparity between guideline recommendations and practice patterns in Europe. Haemorrhagic complications were significantly
Ahrens, Ingo; Smith, Belinda K; Bode, Christoph; Peter, Karlheinz
Antithrombotic therapy is a crucial component of interventional cardiology and currently involves the administration of both anticoagulant and antiplatelet agents. The implementation of standard dual or triple antiplatelet therapies has allowed percutaneous coronary intervention (PCI) with stent implantation to become the treatment of choice in most patients with acute coronary syndromes (ACS), particularly in patients with ST-segment elevation myocardial infarction. However, the combined use of antithrombotic agents increases the bleeding risk associated with coronary intervention, which is a concern due to the increasing evidence that bleeding complications are associated with a higher risk of ischaemic events and death. The shortcomings of currently available anticoagulant drugs have promoted the ongoing development of new, powerful anticoagulant agents that have both efficacy in the setting of PCI and a reduced risk of bleeding; one of these classes of agents targets the thrombin molecule, a key factor in the coagulation cascade, and belongs to the class of anticoagulants known as direct thrombin inhibitors (DTIs). Bivalirudin, a synthetic peptide, is a DTI with unique, favourable pharmacological properties that include predictable linear pharmacokinetics. Bivalirudin was approved as an anticoagulant in patients undergoing routine PCI in 2000 by the FDA (in 2004 in Europe and Australia) and more recently in patients with ACS undergoing PCI. The pharmacological properties of bivalirudin, along with current indications for its use, are discussed in this review, with a focus on the major completed and ongoing clinical trials with bivalirudin.
Park, Kum-Ju; Kang, Jung Il; Kim, Tae-Seok; Yeo, Ik-Hyun
Antithrombotic and fibrinolytic activity of natto was evaluated on platelet aggregation in vitro and in vivo. Natto showed inhibitory effects on platelet aggregation induced by adenosine 5′diphosphate (ADP) and collagen. Orally administered natto also showed fibrinolytic activity in hypercholesterolemia rats. Normal levels of natto, when administered for four weeks, shortened euglobulin clot lysis time (ECLT) and prolonged partial thromboplastin time (PATT) significantly compared to non-treated group. In addition, the natto treatment decreased total cholesterol in serum. These results showed that intake of normal levels of natto can elicit antithrombotic and fibrinolytic effects, suggesting its consumption may improve blood circulation. PMID:24471066
... Listen Español Text Size Email Print Share Aggressive Behavior Page Content Article Body My child is sometimes very aggressive. What is the best ... once they are quiet and still reinforces this behavior, so your child learns that time out means “quiet and still.” ...
van Staaden, Moira J; Searcy, William A; Hanlon, Roger T
From psychological and sociological standpoints, aggression is regarded as intentional behavior aimed at inflicting pain and manifested by hostility and attacking behaviors. In contrast, biologists define aggression as behavior associated with attack or escalation toward attack, omitting any stipulation about intentions and goals. Certain animal signals are strongly associated with escalation toward attack and have the same function as physical attack in intimidating opponents and winning contests, and ethologists therefore consider them an integral part of aggressive behavior. Aggressive signals have been molded by evolution to make them ever more effective in mediating interactions between the contestants. Early theoretical analyses of aggressive signaling suggested that signals could never be honest about fighting ability or aggressive intentions because weak individuals would exaggerate such signals whenever they were effective in influencing the behavior of opponents. More recent game theory models, however, demonstrate that given the right costs and constraints, aggressive signals are both reliable about strength and intentions and effective in influencing contest outcomes. Here, we review the role of signaling in lieu of physical violence, considering threat displays from an ethological perspective as an adaptive outcome of evolutionary selection pressures. Fighting prowess is conveyed by performance signals whose production is constrained by physical ability and thus limited to just some individuals, whereas aggressive intent is encoded in strategic signals that all signalers are able to produce. We illustrate recent advances in the study of aggressive signaling with case studies of charismatic taxa that employ a range of sensory modalities, viz. visual and chemical signaling in cephalopod behavior, and indicators of aggressive intent in the territorial calls of songbirds.
Becker, Daniel E.
Appropriate preoperative assessment of the dental patient should always include an analysis of the patient's medications. This article reviews the actions and indications for the various categories of antithrombotic medications and considers actual risks for postoperative bleeding and potential interactions with drugs the dental provider might administer or prescribe. PMID:23763563
Levy, Karyn; Hunt, Caroline; Heriot, Sandra
Objective: The aim of the study was to evaluate the effectiveness of an intervention that targeted both anxious and aggressive behaviors in children with anxiety disorders and comorbid aggression by parent report. Method: The effects of a cognitive-behavioral therapy intervention targeting comorbid anxiety and aggression problems were compared…
Clinical guidelines advocate stroke prevention therapy in atrial fibrillation (AF) patients, specifically anticoagulation. However, the decision to initiate treatment is based on the risk (bleeding) versus benefit (prevention of stroke) of therapy, which is often difficult to assess. This review identifies available risk assessment tools to facilitate the safe and optimal use of antithrombotic therapy for stroke prevention in AF. Using key databases and online clinical resources to search the literature (1992–2012), 19 tools have been identified and published to date: 11 addressing stroke risk, 7 addressing bleeding risk and 1 integrating both risk assessments. The stroke risk assessment tools (e.g. CHADS2, CHA2DS2-VASc) share common risk factors: age, hypertension, previous cerebrovascular attack. The bleeding risk assessment tools (e.g. HEMORR2HAGES, HAS-BLED) share common risk factors: age, previous bleeding, renal and liver impairment. In terms of their development, six of the stroke risk assessment tools have been derived from clinical studies, whilst five are based on refinement of existing tools or expert consensus. Many have been evaluated by prospective application to data from real patient cohorts. Bleeding risk assessment tools have been derived from trials, or generated from patient data and then validated via further studies. One identified tool (i.e. Computerised Antithrombotic Risk Assessment Tool [CARAT]) integrates both stroke and bleeding, and specifically considers other key factors in decision-making regarding antithrombotic therapy, particularly those increasing the risk of medication misadventure with treatment (e.g. function, drug interactions, medication adherence). This highlights that whilst separate tools are available to assess stroke and bleeding risk, they do not estimate the relative risk versus benefit of treatment in an individual patient nor consider key medication safety aspects. More effort is needed to synthesize these
Gupta, Bharat; Patil, Neha; Yadav, Manoj; Tripathi, Shashank; Sinha, Saurabh; Sharma, Saurabh; Gupta, Saurabh
Background Periodontitis can be defined as a local inflammatory process which mediates destruction of periodontal tissues & is triggered by bacterial insult. In periodontal infections, the levels of C reactive proteins are elevated as compared to the levels in a periodontally healthy individual. The study was done to determine the relative levels of serum CRP in aggressive, chronic and periodontally healthy subjects and to evaluate the effect of surgical periodontal therapy on serum C-reactive protein levels. Materials and Methods Serum samples were collected from 150 participants (50 healthy control patients (non-periodontitis), 50 patients with chronic periodontitis and aggressive periodontitis. Serum C- reactive protein levels were assessed by means of immunoturbidimetric assay at baseline for subjects in all the 3 groups and 3 months after completion of surgical therapy. Results The mean baseline C-reactive protein (CRP) concentrations in the Groups I, II and III were 1.65±0.57 mg/L, 3.03±2.14 mg/L and 3.09±2.27 mg/L respectively. After treatment, the mean C-reactive protein (CRP) levels in Groups II and III reduced from 3.03±1.67 mg/L to 1.46±1.67 mg/L and from 3.09±1.21 to 1.43±1.21 mg/L respectively. Similar results were found for probing depth and all indexes in Group II and III after treatment. Also, the mean attachment loss in Groups II and III reduced, so the results were highly significant. Conclusion Successful periodontal treatment results in significant decrease in serum C-reactive protein (CRP) levels in otherwise healthy subjects. PMID:26557605
Deutsch, Melanie; Koskinas, John
The liver represents the site of synthesis of most procoagulant and anticoagulant factors, fibrinolytic proteins and thrombopoetin while being also involved in the clearance of hemostatic and fibrinolyic proteins. Therefore in patients with liver insufficiency a great variety of disturbances can be documented resulting however in a new "rebalanced" hemostatic system with a labile equilibrium between thromboses or bleeding. Interestingly patients with liver insufficiency may present with arterial or venous thrombotic episodes requiring antiplatelet and/or antithrombotic therapy despite low platelet count or prolonged INR. The aim of this review is to point on the current knowledge regarding hemostasis in patients with liver insufficiency underlining practical recommendations of the use of antiplatelet and anticoagulant drugs in this setting.
Shi, Dayong; Li, Xiaohong; Li, Jing; Guo, Shuju; Su, Hua; Fan, Xiao
Thrombin, the ultimate proteinase of the coagulation cascade, is an attractive target for the treatment of a variety of cardiovascular diseases. A bromophenol derivative named (+)-3-(2,3-dibromo-4, 5-dihydroxy-phenyl)-4-bromo-5,6-dihydroxy-1,3-dihydroiso-benzofuran 1, isolated from the brown alga Leathesia nana exhibited significant thrombin inhibitory activity. In this study, we investigated the inhibition of human thrombin in vitro with this bromophenol derivative, and its antithrombotic efficacy in vivo using the arteriovenous shunt model and the ferric chloride-induced arterial thrombosis model in rats. The results show that the bromophenol derivative is a potential inhibitor of thrombin (IC50=1.03 nmol/L). In antithrombotic experiments in vivo, the bromophenol derivative also shows good effect comparing with the control group. These data indicate that the bromophenol derivative is a potential drug for prophylaxis and the treatment of thrombotic diseases.
Han, Jing; Wang, Peng; Ge, Shaohua
The object of this study is to characterize the bacterial community of subgingival plaque of two subjects with generalized aggressive periodontitis (GAgP) pre- and post-treatment. We picked two patients with GAgP and used high-throughput 16S rDNA sequencing. V4 hypervariable region was picked for PCR amplification of subgingival samples. Then, the PCR products were sequenced through Illumina MiSeq platform. One month after therapy, both the clinical features and periodontal parameters improved obviously. Moreover, the composition and structure of subgingival bacterial community changed after initial periodontal therapy. Also, the composition of the subgingival microbiota was highly individualized among different patients. Bacteroidetes, Spirochaetes and Fusobacteria were related to pathogenicity of GAgP while Actinobacteria and Proteobacteria seemed associated with clinical symptoms resolution. In this study, we found the subgingival bacterial community was high in species richness but dominated by a few species or phylotypes, with significant shifts of microbiota that occurred after treatment. This study demonstrated the shift of the subgingival bacterial community before and after treatment by high-throughput 16S rDNA sequencing, and provided a concise method for analysis of microbial community for periodontal diseases.
Hanzel, George; Balon, Helena; Wong, Oliver; Soffer, Daniel; Lee, Daniel Taehee; Safian, Robert David
Sixty-six patients with atherosclerotic renal artery stenosis (RAS) and serum creatinine < or =2.0 mg/dl were treated with antihypertensive therapy, a statin, and aspirin. Renal stenting was reserved for patients with injuries to the heart, brain, or kidneys. The primary end point was stenotic kidney glomerular filtration rate (GFR) at 21 months; secondary end points included major adverse clinical events, serum creatinine, total GFR, and blood pressure (BP). After baseline evaluation, 26 of 66 patients underwent renal stenting because of injuries to the heart, brain, or kidneys. After 21 months, 6 medical patients required renal stenting, and 5 patients experienced late clinical events (2 medical patients, 3 stent patients). There was no difference in final BP between groups. Whereas medical patients experienced 6% and 8% decreases in total and stenotic kidney GFR, stent patients experienced 7% and 11% increases in total kidney (p = 0.006) and stenotic kidney (p = 0.02) GFR. There was no difference in final serum creatinine. In conclusion, patients with atherosclerotic RAS and baseline creatinine < or =2.0 mg/dl can be safely managed with aggressive medical therapy, with a small decrease in GFR. For patients who develop injuries to the heart, brain, or kidneys, renal artery stenting may further reduce hypertension and improve renal function.
Neural Mechanisms of Cognitive-Behavioral Therapy for Aggression in Children and Adolescents: Design of a Randomized Controlled Trial Within the National Institute for Mental Health Research Domain Criteria Construct of Frustrative Non-Reward
Wyk, Brent C. Vander; Eilbott, Jeffrey A.; McCauley, Spencer A.; Ibrahim, Karim; Crowley, Michael J.; Pelphrey, Kevin A.
Abstract Objective: We present the rationale and design of a randomized controlled trial of cognitive-behavioral therapy (CBT) for aggression in children and adolescents, which is conducted in response to the National Institute of Mental Health (NIMH) Research Domain Criteria (RDoC) approach initiative. Specifically, the study is focused on the brain-behavior associations within the RDoC construct of frustrative non-reward. On the behavioral level, this construct is defined by reactions elicited in response to withdrawal or prevention of reward, most notably reactive aggression. This study is designed to test the functional magnetic resonance (fMRI) and electrophysiological (EEG) correlates of aggression and its reduction after CBT. Methods: Eighty children and adolescents with high levels of aggression across multiple traditional diagnostic categories, ages 8–16, will be randomly assigned to receive 12 sessions of CBT or 12 sessions of supportive psychotherapy. Clinical outcomes will be measured by the ratings of aggressive behavior collected at baseline, midpoint, and endpoint evaluations, and by the Improvement Score of the Clinical Global Impressions Scale assigned by an independent evaluator (blinded rater). Subjects will also perform a frustration-induction Go-NoGo task and a task of emotional face perception during fMRI scanning and EEG recording at baseline and endpoint. Results: Consistent with the NIMH strategic research priorities, if functional neuroimaging and EEG variables can identify subjects who respond to CBT for aggression, this can provide a neuroscience-based classification scheme that will improve treatment outcomes for children and adolescents with aggressive behavior. Conclusions: Demonstrating that a change in the key nodes of the emotion regulation circuitry is associated with a reduction of reactive aggression will provide evidence to support the validity of the frustrative non-reward construct. PMID:26784537
Lamar, Zanetta S.; Fino, Nora; Palmer, Jodi; Gruber, Lindsey; Morris, Bonny B.; RaetskayaSolntseva, Olga; Kennedy, LeAnne; Vaidya, Rakhee; Hurd, David; Zamkoff, Kenneth
Introduction Dose-adjusted etoposide, prednisone, vincristine, cyclophosphamide and doxorubicin (DA-EPOCH) was developed in an effort to overcome inadequate drug concentrations and to compensate for increased drug clearance. The goal of this study was to examine risk factors and outcomes in patients with aggressive non-Hodgkin lymphoma (aNHL) treated with DA-EPOCH. Patients and Methods We report 136 patients with previously untreated aNHL treated with infusional DA-EPOCH chemotherapy +/- rituximab from 2005-2013. Overall survival was estimated by Kaplan Meier methods. Univariate and multivariate logistic regression was used to determine factors associated with experiencing death, progression, or relapse at two years. Results The overall response rate was 82%. Relapse-free survival at 1, 3, and 5 years was 68%, 63%, and 52% with 95% CIs [0.59,0.85], [0.54,0.70], and [0.31,0.70], respectively. Patients with T-cell aNHL had increased risk of death, progression or relapse [OR:3.5, 95% CI: 1.4, 8.8] compared to those with B-cell aNHL. In multivariate analysis, current smoking, disease in the bone marrow and number of cycles completed were independent predictors of death or relapse. Conclusion Our data suggests EPOCH+/-R is active in both B and T-cell aNHL. Toxicity did not significantly delay treatment or negatively impact outcomes. Dose adjustment by hematopoietic nadir had no impact on outcomes. The impact of smoking during chemotherapy should be further evaluated. PMID:26725264
TransRadial Education and Therapeutics (TREAT): shifting the balance of safety and efficacy of antithrombotic agents in percutaneous coronary intervention: a report from the Cardiac Safety Research Consortium.
Hess, Connie N; Rao, Sunil V; Kong, David F; Miller, Julie M; Anstrom, Kevin J; Bertrand, Olivier F; Collet, Jean-Philippe; Effron, Mark B; Eloff, Benjamin C; Fadiran, Emmanuel O; Farb, Andrew; Gilchrist, Ian C; Holmes, David R; Jacobs, Alice K; Kaul, Prashant; Newby, L Kristin; Rutledge, David R; Tavris, Dale R; Tsai, Thomas T; White, Roseann M; Peterson, Eric D; Krucoff, Mitchell W
Percutaneous coronary intervention (PCI) is an integral part of the treatment of coronary artery disease. The most common complication of PCI, bleeding, typically occurs at the vascular access site and is associated with short-term and long-term morbidity and mortality. Periprocedural bleeding also represents the primary safety concern of concomitant antithrombotic therapies essential for PCI success. Use of radial access for PCI reduces procedural bleeding and hence may change the risk profile and net clinical benefit of these drugs. This new drug-device safety interaction creates opportunities to advance the safe and effective use of antithrombotic agents during PCI. In June 2010 and March 2011, leaders from government, academia, professional societies, device manufacturing, and pharmaceutical industries convened for 2 think tank meetings. Titled TREAT I and II, these forums examined approaches to improve the overall safety of PCI by optimizing strategies for antithrombotic drug use and radial artery access. This article summarizes the content and proceedings of these sessions.
Müller, Felicitas; Gailani, David; Renné, Thomas
Purpose of review Arterial and venous thrombosis are major causes of morbidity and mortality, and the incidence of thromboembolic diseases increases as a population ages. Thrombi are formed by activated platelets and fibrin. The latter is a product of the plasma coagulation system. Currently available anticoagulants such as heparins, vitamin K antagonists and inhibitors of thrombin or factor Xa target enzymes of the coagulation cascade that are critical for fibrin formation. However, fibrin is also necessary for terminating blood loss at sites of vascular injury. As a result, anticoagulants currently in clinical use increase the risk of bleeding, partially offsetting the benefits of reduced thrombosis. This review focuses on new targets for anticoagulation that are associated with minimal or no therapy-associated increased bleeding. Recent findings Data from experimental models using mice and clinical studies of patients with hereditary deficiencies of coagulation factors XI or XII have shown that both of these clotting factors are important for thrombosis, while having minor or no apparent roles in processes that terminate blood loss (hemostasis). Summary Hereditary deficiency of factor XII (Hageman factor) or factor XI, plasma proteases that initiate the intrinsic pathway of coagulation, impairs thrombus formation and provides protection from vascular occlusive events, while having a minimal impact on hemostasis. As the factor XII–factor XI pathway contributes to thrombus formation to a greater extent than to normal hemostasis, pharmacological inhibition of these coagulation factors may offer the exciting possibility of anticoagulation therapies with minimal or no bleeding risk. PMID:21730835
Villaverde, Marcela S; Combe, Kristell; Duchene, Adriana G; Wei, Ming X; Glikin, Gerardo C; Finocchiaro, Liliana M E
In an aggressive B16-F10 murine melanoma model, we evaluated the effectiveness and antitumor mechanisms triggered by a surgery adjuvant treatment that combined a local suicide gene therapy (SG) with a subcutaneous genetic vaccine (Vx) composed of B16-F10 cell extracts and lipoplexes carrying the genes of human interleukin-2 and murine granulocyte and macrophage colony stimulating factor. Pre-surgical SG treatment, neither alone nor combined with Vx was able to slow down the fast evolution of this tumor. After surgery, both SG and SG + Vx treatments, significantly prevented (in 50% of mice) or delayed (in the remaining 50%) post-surgical recurrence, as well as significantly prolonged recurrence-free (SG and SG + Vx) and overall median survival (SG + Vx). The treatment induced the generation of a pseudocapsule wrapping and separating the tumor from surrounding host tissue. Both, SG and the subcutaneous Vx, induced this envelope that was absent in the control group. On the other hand, PET scan imaging of the SG + Vx group suggested the development of an effective systemic immunostimulation that enhanced (18)FDG accrual in the thymus, spleen and vertebral column. When combined with surgery, direct intralesional injection of suicide gene plus distal subcutaneous genetic vaccine displayed efficacy and systemic antitumor immune response without host toxicity. This suggests the potential value of the assayed approach for clinical purposes.
Suleria, Hafiz Ansar Rasul; Hines, Barney M.; Addepalli, Rama; Chen, Wei; Masci, Paul; Gobe, Glenda; Osborne, Simone A.
Waste generated from the processing of marine organisms for food represents an underutilized resource that has the potential to provide bioactive molecules with pharmaceutical applications. Some of these molecules have known anti-thrombotic and anti-coagulant activities and are being investigated as alternatives to common anti-thrombotic drugs, like heparin and warfarin that have serious side effects. In the current study, extracts prepared from blacklip abalone (Haliotis rubra) processing waste, using food grade enzymes papain and bromelain, were found to contain sulphated polysaccharide with anti-thrombotic activity. Extracts were found to be enriched with sulphated polysaccharides and assessed for anti-thrombotic activity in vitro through heparin cofactor-II (HCII)-mediated inhibition of thrombin. More than 60% thrombin inhibition was observed in response to 100 μg/mL sulphated polysaccharides. Anti-thrombotic potential was further assessed as anti-coagulant activity in plasma and blood, using prothrombin time (PT), activated partial thromboplastin time (aPTT), and thromboelastography (TEG). All abalone extracts had significant activity compared with saline control. Anion exchange chromatography was used to separate extracts into fractions with enhanced anti-thrombotic activity, improving HCII-mediated thrombin inhibition, PT and aPTT almost 2-fold. Overall this study identifies an alternative source of anti-thrombotic molecules that can be easily processed offering alternatives to current anti-thrombotic agents like heparin. PMID:28042854
Chen, Anjin; Zhang, Fang; Shi, Jie; Zhao, Xue
The antithrombotic and antiplatelet effects of two fucoidan fractions with low molecular weight and different sulfate content from Laminaria japonica were compared in order to examine the influence of chemical character on their antithrombotic activity and the possible mechanism. Both LMW fucoidan fractions exhibited favorable antithrombotic activity in an Fecl3-induced arterial thrombosis. The antithrombotic activity of LMW fucoidan was related with decrease of TXB2 and whole blood viscosity and hematocrit. LMW fucoidan showed a correlation between anticoagulant, antiaggregant and antithrombotic effects in vivo. For LMW fucoidan, antithrombotic activity required high dose of 5-10 nmol kg-1, concomitantly with increase in anticoagulant activity and inhibition of platelet aggregation. Administration of LMW fucoidan significantly promoted the 6-keto-PGF1α content and decreased the TXB2 content, indicating its inhibition of tissue factor pathway and regulation of metabolism of arachidonic acid. By comparison, highly sulfated fucoidan LF2 with Mw 3900 seemed to be a more suitable choice for antithrombotic drug for its antithrombotic activity accompanied with specific inhibitory activity on platelet aggregation, low anticoagulant activity and low hemorrhagic risk in vivo.
Camm, A John; Accetta, Gabriele; Ambrosio, Giuseppe; Atar, Dan; Bassand, Jean-Pierre; Berge, Eivind; Cools, Frank; Fitzmaurice, David A; Goldhaber, Samuel Z; Goto, Shinya; Haas, Sylvia; Kayani, Gloria; Koretsune, Yukihiro; Mantovani, Lorenzo G; Misselwitz, Frank; Oh, Seil; Turpie, Alexander G G; Verheugt, Freek W A; Kakkar, Ajay K
Objective We studied evolving antithrombotic therapy patterns in patients with newly diagnosed non-valvular atrial fibrillation (AF) and ≥1 additional stroke risk factor between 2010 and 2015. Methods 39 670 patients were prospectively enrolled in four sequential cohorts in the Global Anticoagulant Registry in the FIELD-Atrial Fibrillation (GARFIELD-AF): cohort C1 (2010–2011), n=5500; C2 (2011–2013), n=11 662; C3 (2013–2014), n=11 462; C4 (2014–2015), n=11 046. Baseline characteristics and antithrombotic therapy initiated at diagnosis were analysed by cohort. Results Baseline characteristics were similar across cohorts. Median CHA2DS2-VASc (cardiac failure, hypertension, age ≥75 (doubled), diabetes, stroke (doubled)-vascular disease, age 65–74 and sex category (female)) score was 3 in all four cohorts. From C1 to C4, the proportion of patients on anticoagulant (AC) therapy increased by almost 15% (C1 57.4%; C4 71.1%). Use of vitamin K antagonist (VKA)±antiplatelet (AP) (C1 53.2%; C4 34.0%) and AP monotherapy (C1 30.2%; C4 16.6%) declined, while use of non-VKA oral ACs (NOACs)±AP increased (C1 4.2%; C4 37.0%). Most CHA2DS2-VASc ≥2 patients received AC, and this proportion increased over time, largely driven by NOAC prescribing. NOACs were more frequently prescribed than VKAs in men, the elderly, patients of Asian ethnicity, those with dementia, or those using non-steroidal anti-inflammatory drugs, and current smokers. VKA use was more common in patients with cardiac, vascular, or renal comorbidities. Conclusions Since NOACs were introduced, there has been an increase in newly diagnosed patients with AF at risk of stroke receiving guideline-recommended therapy, predominantly driven by increased use of NOACs and reduced use of VKA±AP or AP alone. Trial registration number NCT01090362; Pre-results. PMID:27647168
[Peculiarities of antithrombotic treatment in exacerbation of coronary heart disease and transcutaneous coronary interventions in patients suffering from atrial fibrillation and taking vitamin K antagonists (literature review)].
Iavelov, I S
The review analyses various approaches to management of patients presenting with atrial fibrillation and having to take vitamin K agonists in order to prevent arterial thromboembolic complications in cases they develop exacerbations of their coronary hear disease and/or require transcutaneous coronary interventions. With the problem being insufficiently studied as yet, the majority of therapeutic decisions as to the most efficient and safe methods of administering antithrombotic agents in the clinical situations involved are made based on the results of follow up of the patients, the data regarding peculiarities of the action of therapeutic agents, and common sense. Presented herein are contemporary recommendations on long-term antithrombotic therapy in patients suffering from atrial fibrillation and taking vitamin K antagonists and subjected to coronary stenting.
Mason, R. G.; Wolf, R. H.; Zucker, W. H.; Shinoda, B. A.; Mohammad, S. F.
The effects of aspirin, cyproheptadine, dextran, dipyridamole, and sulfinpyrazone on thrombus deposition were determined. These antithrombotic agents were evaluated in a nonhuman primate model for thrombus generation that employed test devices exposed to blood in an arteriovenous shunt. Thrombus deposition on test devices was quantitated gravimetrically. Of the antithrombotic agents tested, cyproheptadine was found to be the most effective, and aspirin, dextran, and dipyridamole were each somewhat less effective. Sulfinpyrazone had only a slight antithrombotic effect. Ultrastructual studies of thrombus deposited in test devices showed that the various antithrombotic agents tested did not prevent completely the formation of fibrin, aggregation of platelets, or adhesion and spreading of platelets and leukocytes. This model for thrombus generation is felt to be a more efficient means for evaluating antithrombotic agents than previously described nonhuman primate models. Images Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 PMID:820202
New oral anticoagulants (NOACs) have emerged as an alternative therapy to warfarin in the treatment of arterial and venous thromboembolism and in stroke prevention in patients with non-valvular atrial fibrillation (AF). Three of them, i.e., dabigatran, rivaroxaban, and apixaban, have been approved for clinical use in North America and in a number of European countries. In non-valvular AF, their approval was based on large randomized trials showing that they are non-inferior or even, in some instances, superior to warfarin. Dabigatran is a direct thrombin (factor IIa) inhibitor; rivaroxaban and apixaban are direct factor Xa inhibitors. Before using NOACs, it is recommended to become familiar with their pharmacological characteristics and their metabolism. The absence of specific antidotes is often cited as part of the possible weaknesses of NOACs. Antidotes are perceived to be useful in emergency situations such as life-threatening bleeding or non-elective major surgery. NOACs do not require blood monitoring, and therefore, patient compliance to the treatment is essential. For the present time, there are no specific antidotes available for the three NOACs approved for clinical use. However, phase I or phase II research studies in this area are ongoing. For dabigatran, a specific antidote has been tested in a rat model of anticoagulation, and a study in healthy male volunteers has been recently reported. For rivaroxaban, prothrombin complex concentrates (PCCs) have been found to completely reverse the prolongation of the prothrombin time induced by this NOAC. For apixaban, recombinant factor VII was found in an experimental study using human blood to be superior to activated PCC (aPCC) and PCC. More specific antidotes for rivaroxaban and apixaban are in phases I and II evaluation. The management of patients suffering from a major bleeding or requiring a non-elective major surgery includes non-specific reversal agents and is discussed in the light of a recent position
Zavyalova, Elena; Golovin, Andrey; Pavlova, Galina; Kopylov, Alexey
Blood hemostasis is attained with two sophisticated interconnected network systems, a coagulation cascade and a platelet activation system. Multiple inhibitors were developed to various components of both systems to prevent thrombosis-related morbid events that are of extremely high frequency in the human population. Antithrombotic inhibitors possess both positive and negative aspects. One of the essential modern requirements is a controllable mode of action for both anticoagulants and antiplatelets that could be achieved due to the high affinity and specificity of the inhibitor, as well as a possibility to apply an antidote, which quickly annihilates activity of the inhibitor and restores the proper hemostasis. Aptamers are DNA or RNA oligonucleotides with particular tertiary structure, such as DNA guanine quadruplex. Besides antibodies and other peptides/proteins, aptamers are one more example of the molecular recognizing elements that specifically bind to the target. Therefore, aptamers could be developed into a promising novel class of the drugs with high affinity, specificity, innate low toxicity, and rational antidote. Several aptamers with prospective antithrombotic activity have been reviewed; some of them are in preclinical and clinical trials.
Klafke, Jonatas Zeni; Arnoldi da Silva, Mariane; Fortes Rossato, Mateus; Trevisan, Gabriela; Banderó Walker, Cristiani Isabel; Martins Leal, Cláudio Alberto; Olschowsky Borges, Diego; Chitolina Schetinger, Maria Rosa; Noal Moresco, Rafael; Medeiros Frescura Duarte, Marta Maria; Soares Dos Santos, Adair Roberto; Nazário Viecili, Paulo Ricardo; Ferreira, Juliano
In a previous work based on popular belief, Campomanesia xanthocarpa Berg., popularly known as "guavirova", showed to have a potential effect in the control of a number of conditions associated with cardiovascular diseases. The aim of the present work was to investigate the effects of C. xanthocarpa extract (CXE) on antiplatelet, antithrombotic and fibrinolytic activities in mice and in human blood. Mice were treated orally for 5 days with CXE or acetylsalicylic acid and at the end of the treatment period animals were challenged for bleeding, acute thromboembolism and ulcerogenic activity. In addition, we have assessed the prothrombin time and activated partial thromboplastin time (aPTT) after oral administration. In in vitro assays, antiplatelet effects of CXE was evaluated on platelet aggregation, and fibrinolytic activity of the extract was observed by mice or human artificial blood clot degradation. Platelet citotoxicity of the extract was also determined by the LDH assay. Results demonstrated that CXE has a significant protective effect on thrombosis. It also inhibits platelet aggregation without demonstrating cytotoxicity on platelets. CXE slightly prolonged aPTT and showed no ulcerogenic activity after oral administration. In addition, CXE showed a fibrinolytic activity. Thus, C. xanthocarpa showed antiplatelet, antithrombotic and fibrinolytic activities in mice.
Klafke, Jonatas Zeni; Arnoldi da Silva, Mariane; Fortes Rossato, Mateus; Trevisan, Gabriela; Banderó Walker, Cristiani Isabel; Martins Leal, Cláudio Alberto; Olschowsky Borges, Diego; Chitolina Schetinger, Maria Rosa; Noal Moresco, Rafael; Medeiros Frescura Duarte, Marta Maria; Soares dos Santos, Adair Roberto; Nazário Viecili, Paulo Ricardo; Ferreira, Juliano
In a previous work based on popular belief, Campomanesia xanthocarpa Berg., popularly known as “guavirova”, showed to have a potential effect in the control of a number of conditions associated with cardiovascular diseases. The aim of the present work was to investigate the effects of C. xanthocarpa extract (CXE) on antiplatelet, antithrombotic and fibrinolytic activities in mice and in human blood. Mice were treated orally for 5 days with CXE or acetylsalicylic acid and at the end of the treatment period animals were challenged for bleeding, acute thromboembolism and ulcerogenic activity. In addition, we have assessed the prothrombin time and activated partial thromboplastin time (aPTT) after oral administration. In in vitro assays, antiplatelet effects of CXE was evaluated on platelet aggregation, and fibrinolytic activity of the extract was observed by mice or human artificial blood clot degradation. Platelet citotoxicity of the extract was also determined by the LDH assay. Results demonstrated that CXE has a significant protective effect on thrombosis. It also inhibits platelet aggregation without demonstrating cytotoxicity on platelets. CXE slightly prolonged aPTT and showed no ulcerogenic activity after oral administration. In addition, CXE showed a fibrinolytic activity. Thus, C. xanthocarpa showed antiplatelet, antithrombotic and fibrinolytic activities in mice. PMID:21915188
Kapoor, Rohit; Harde, Harshad; Jain, Sanyog; Panda, Amulya Kumar; Panda, Bibhu Prasad
The present research work describes the downstreaming of nattokinase (NK) produced by Bacillus subtilis under solid state fermentation; and the role of efficient oral formulation of purified NK in the management of thrombotic disorders. Molecular weight of purified NK was estimated to be 28 kDa with specific activity of 504.4 FU/mg. Acid stable nattokinase loaded chitosan nanoparticles (sNLCN) were fabricated for oral delivery of this enzyme. Box-Behnken design (BBD) was employed to investigate and validate the effect of process (independent) variables on the quality attributes (dependent variables) of nanoparticles. The integrity, conformational stability and preservation of fibrinolytic activity of NK (in both free and sNLCN forms) were established by SDS-PAGE, CD analysis and in vitro clot lytic examination, respectively. A 'tail thrombosis model' demonstrated significant decrease in frequency of thrombosis in Wistar rats upon peroral administration of sNLCN in comparison with negative control and free NK group. Furthermore, coagulation analysis, namely the measurement of prothrombin and activated partial thromboplastin time illustrated that sNLCN showed significantly (p < 0.001) higher anti-thrombotic potential in comparison to the free NK. Further, sNLCN showed anti-thrombotic profile similar to warfarin. This study signifies the potential of sNLCN in oral delivery of NK for the management of thrombotic disorders.
Xie, Pingyao; Cui, Lili; Shan, Yuan
The compounds of Radix Paeoniae Rubra (RPR) were isolated and identified by bioassay-guided method, and antithrombotic effects and mechanism were investigated by the acute blood stasis rat model. The RPR extract was evaluated by APTT, TT, PT, and FIB assays in vitro. Results indicated that RPR extract exhibited the anticoagulant activity. In order to find active compounds, six compounds were isolated and identified, and four compounds, paeoniflorin (Pae), pentagalloylglucose (Pen), albiflorin (Ali), and protocatechuic acid (Pro), exhibited the anticoagulant activity in vitro. Therefore, the antithrombosis effects of RPR extract and four active compounds were investigated in vivo by measuring whole blood viscosity (WBV), plasma viscosity (PV), APTT, PT, TT, and FIB. Meanwhile, the levels of TXB2, 6-Keto-PGF1α, eNOS, and ET-1 were detected. Results suggested that RPR extract and four active compounds had the inhibition effect on thrombus formation, and the antithrombotic effects were associated with the regulation of vascular endothelium active substance, activating blood flow and anticoagulation effect. PMID:28299338
Tian, Yue; Zhao, Yuyun; Zheng, Wenfu; Zhang, Wei; Jiang, Xingyu
Here we report the antithrombotic functions of pyrimidinethiol-capped gold nanoparticles (Au_DAPT NPs). They can prolong coagulation parameters when injected intravenously in normal mice. Applied in two typical thrombosis models, mice tail thrombosis and pulmonary thromboembolism, gold NPs can inhibit both thrombosis and improve the survival rates of mice tremendously, without increasing the bleeding risk. The anticoagulant mechanisms include inhibiting the platelet aggregation as well as interfering with thrombin and fibrin generation.Here we report the antithrombotic functions of pyrimidinethiol-capped gold nanoparticles (Au_DAPT NPs). They can prolong coagulation parameters when injected intravenously in normal mice. Applied in two typical thrombosis models, mice tail thrombosis and pulmonary thromboembolism, gold NPs can inhibit both thrombosis and improve the survival rates of mice tremendously, without increasing the bleeding risk. The anticoagulant mechanisms include inhibiting the platelet aggregation as well as interfering with thrombin and fibrin generation. Electronic supplementary information (ESI) available. See DOI: 10.1039/c4nr01937g
Mismetti, P; Laporte-Simitsidis, S; Decousus, H
The determination of the "optimal" dose is an essential step in the development of a molecule. In the case of anti-thrombotic agents, the search for this "optimal" dose is based on dose-effect relationships on biological criteria in phase I, and, often, radiological criteria in phase II trials. The main objective of these dose studies is not to directly evaluate the benefit-risk ratio of the molecule under development, but to find the dose which will be tested in phase II to estimate the benefit-risk ratio. Errors of choice of dosage observed at the end of phase III trials may be due to problems of extrapolability of the results of the dose studies due to too strict a selection of subjects included and therefore not representative of the target population of the new treatment or to the use of intermediary criteria for the evaluation of the antithrombotic effect. However, these dosage errors are still mainly due to an inadequate search for the "optimal" dose despite the fact that the ethnical and economic consequences are not negligible.
Zheng, Hua-Chuan; Liu, Jia-Jie; Li, Jing; Wu, Ji-Cheng; Yang, Lei; Zhao, Gui-Feng; Zhao, Xin; Jiang, Hua-Mao; Huang, Ke-Qiang; Li, Zhi-Jie
Down-regulated parafibromin is positively linked to the pathogenesis of parathyroid, lung, breast, ovarian, gastric and colorectal cancers. Here, we found that wild-type (WT) parafibromin overexpression suppressed proliferation, tumor growth, induced cell cycle arrest and apoptosis in colorectal cancer cells (p<0.05), but it was the converse for mutant-type (MT, mutation in nucleus localization sequence) parafibromin (p<0.05). Both WT and MT transfectants inhibited migration and invasion, and caused better differentiation (p<0.05) of cancer cells. WT parafibromin transfectants showed the overexpression of Cyclin B1, Cyclin D1, Cyclin E, p38, p53, and AIF in HCT-15 and HCT-116 cells, while MT parafibromin only up-regulated p38 expression. There was lower mRNA expression of bcl-2 in parafibromin transfectants than the control and mock, while higher expression of c-myc, Cyclin D1, mTOR, and Raptor. According to transcriptomic analysis, WT parafibromin suppressed PI3K-Akt and FoxO signaling pathways, while MT one promoted PI3K-Akt pathway, focal adhesion, and regulation of actin cytoskeleton. Parafibromin was less expressed in colorectal cancer than paired mucosa (p<0.05), and inversely correlated with its differentiation at both mRNA and protein levels (p<0.05). These findings indicated that WT parafibromin might reverse the aggressive phenotypes of colorectal cancer cells and be employed as a target for gene therapy. Down-regulated parafibromin expression might be closely linked to colorectal carcinogenesis and cancer differentiation.
Li, Dianhe; Wang, Haofei; Qiu, Min; Li, Na
Background We performed a meta-analysis to compare overall survival (OS) outcomes in patients with synchronous oligometastatic non-small cell lung cancer (NSCLC) who underwent aggressive thoracic therapy (ATT) with those who did not. Methods A systematic review of controlled trials of ATT on survival in synchronous oligometastatic NSCLC was conducted. Hazard ratio (HR) for the main endpoint OS was pooled using a fixed-effects model. Subgroup analysis was performed in patients with single organ metastases, or with different numbers of brain metastases, or with different stages of thoracic disease. Pooled survival curves of OS were constructed. Results Seven eligible retrospective observational cohort studies were identified including 668 synchronous oligometastatic NSCLC patients, of whom 227 (34.0%) received ATT. For patients with synchronous oligometastatic NSCLC, ATT was associated with a significant improvement of OS (HR, 0.48; 95% CI, 0.39–0.60; P<0.00001). In subgroup analysis, the association with OS was similar or even strengthened, with a HR of 0.42 (95% CI, 0.31–0.56) in single organ metastases group, 0.49 (95% CI, 0.31–0.75) in solitary brain metastasis group, and 0.38 (95% CI, 0.20–0.73) in thoracic stage I–II group, respectively. The pooled cumulative survival rates for patients received ATT were 74.9% at 1 year, 52.1% at 2 years, 23.0% at 3 years, and 12.6% at 4 years. The corresponding pooled survival for patients who did not receive ATT were 32.3%, 13.7%, 3.7%, and 2.0%, respectively. Conclusions Survival benefit from ATT is common in synchronous oligometastatic patients. Selected patients with synchronous oligometastatic NSCLC could also achieve long-term survival with ATT. PMID:28275479
Alfred Adler devised a theory that was holistic, social, teleological, and phenomenological. Adler believed that the basis of problems with children originated in the child's inability to cooperate with society, feelings of inferiority, and a lack of a goal in life. Adler felt the child's life should be examined through the child's eyes.…
Teitel, Jerome M.
Venous thromboembolic diseases are among the most important causes of morbidity and mortality in Canada. Agents which interfere with the coagulation mechanism are highly effective in treating these disorders, but at the potentially high cost of serious hemorrhagic complications. The optimal prevention of both serious outcomes and complications of therapy can be achieved by prophylactic treatment of high risk patients. Heparin and vitamin K antagonists remain the mainstays of antithrombotic therapy. The pharmacology of these agents is reviewed, and a rational approach to their clinical use is presented. PMID:21279098
Burcham, Pamela K.; Rozycki, Alan J.
Despite the immense growth in extracorporeal life support (ECLS) technology and experience, opportunity remains to better characterize the pharmacotherapeutic considerations during ECLS. Analgosedation can be particularly challenging in the ECLS population due to in drug-circuit interactions that may lead to decreased systemic concentrations and pharmacodynamic effect. ECLS also requires the use of antithrombotic agents to mitigate the prothrombotic state created by the artificial surface in the ECLS circuit. There are a number of coagulation monitoring tests available. However, optimal monitoring and management in ECLS has not been established. Heparin continues to be the anticoagulant of choice for most ECLS centers, however, there is growing interest in the use of parenteral direct thrombin inhibitors (DTI) in this population. Advances in understanding pharmacotherapeutic management have not kept up with the technological advances in this population. More investigation is warranted to gain a greater understanding of the pharmacotherapeutic implications, facilitate standardized evidence-based practices, and improve patient centered outcomes. PMID:28275614
Suárez Fernández, C; Camafort, M; Cepeda Rodrigo, J M; Díez-Manglano, J; Formiga, F; Pose Reino, A; Tiberio, G; Mostaza, J M
Atrial fibrillation (AF) in the elderly is a complex condition due to the high number of frequently associated comorbidities, such as cardiovascular and kidney disease, cognitive disorders, falls and polypharmacy. Except when contraindicated, anticoagulation is necessary for preventing thromboembolic events in this population. Both vitamin K antagonists and direct oral anticoagulants (dabigatran, rivaroxaban and apixaban) are indicated in this context. Renal function should be closely monitored for this age group when these drugs are used. In recent years, various clinical practice guidelines have been published on patients with AF. The majority of these guidelines make specific recommendations on the clinical characteristics and treatment of elderly patients. In this update, we review the specific comments on the recommendations concerning antithrombotic treatment in elderly patients with nonvalvular AF.
Choi, Jun-Hui; Kim, Seung; Kim, Sung-Jun
We investigated in vitro and in vivo fibrinolytic and antithrombotic activity of spirulan and analyzed its partial biochemical properties. Spirulan, a sulfated polysaccharide from the blue-green alga Arthrospira platensis, exhibits antithrombotic potency. Spirulan showed a strong fibrin zymogram lysis band corresponding to its molecular mass. It specifically cleaved Aα and Bβ, the major chains of fibrinogen. Spirulan directly decreased the activity of thrombin and factor X activated (FXa), procoagulant proteins. In vitro assays using human fibrin and mouse blood clots showed fibrinolytic and hemolytic activities of spirulan. Spirulan (2 mg/kg) showed antithrombotic effects in the ferric chloride (FeCl3 )-induced carotid arterial thrombus model and collagen and epinephrine-induced pulmonary thromboembolism mouse model. These results may be attributable to the prevention of thrombus formation and partial lysis of thrombus. Therefore, we suggest that spirulan may be a potential antithrombotic agent for thrombosis-related diseases.
The dynamic evolution of therapeutic options including the use of vitamin K antagonists (VKA), non-vitamin K oral anticoagulants (NOAC), more potent antiplatelet drugs as well as new generation drug-eluting stents could lead to the view that the current recommendations on the management of patients with percutaneous coronary intervention (PCI) requiring oral anticoagulation do not keep up with the results of several clinical studies published within the last 5 years. In the present overview, we summarize the recent advances in antithrombotic management used in atrial fibrillation patients undergoing PCI for stable coronary artery disease or acute coronary syndrome (ACS). The safety and efficacy of prasugrel and ticagrelor taken with oral anticoagulants also remain to be established in randomized trials; therefore the P2Y12 inhibitor clopidogrel on top of aspirin or without is now recommended to be used together with a VKA or NOAC. It is still unclear which dose of a NOAC in combination with antiplatelet agents and different stents should be used in this clinical setting and whether indeed NOAC are safer compared with VKA in such cardiovascular patients. Moreover, we discuss the use of anticoagulation in addition to antiplatelet therapy for secondary prevention in patients with ACS. To minimize bleeding risk in anticoagulated patients following PCI or ACS, the right agent should be prescribed to the right patient at the right dose and supported by regular clinical evaluation and laboratory testing, especially assessment of renal function when a NOAC is used. PMID:27980542
reliably distinguish renal cancer aggressiveness for optimal triage of therapies . Hyperpolarized (HP) 13C magnetic resonance spectroscopic imaging (MRSI...reliably distinguish renal cancer aggressiveness for optimal triage of therapies . Hyperpolarized (HP) 13C magnetic resonance spectroscopic imaging (MRSI) is... cancer and normal tissues were obtained from nephrectomy specimens and sliced using Krumdieck slicer. With a precision gauge micrometer, the slice
Hecker, Sydney P.; Jamplis, Robert W.; Mitchell, Sidney P.
In analysis of the results of treatment of 48 episodes of spontaneous pneumothorax, aggressive treatment by means of closed intercostal drainage with constant suction was found to achieve the aims of therapy more effectively than conservative measures of bed rest with or without needle aspiration. In general, full expansion of the lung was more quickly restored, recurrence was of lesser incidence, the period in hospital was shorter and the time away from work was reduced. ImagesFigure 1. PMID:13905846
Hollopeter, G; Jantzen, H M; Vincent, D; Li, G; England, L; Ramakrishnan, V; Yang, R B; Nurden, P; Nurden, A; Julius, D; Conley, P B
Platelets have a crucial role in the maintenance of normal haemostasis, and perturbations of this system can lead to pathological thrombus formation and vascular occlusion, resulting in stroke, myocardial infarction and unstable angina. ADP released from damaged vessels and red blood cells induces platelet aggregation through activation of the integrin GPIIb-IIIa and subsequent binding of fibrinogen. ADP is also secreted from platelets on activation, providing positive feedback that potentiates the actions of many platelet activators. ADP mediates platelet aggregation through its action on two G-protein-coupled receptor subtypes. The P2Y1 receptor couples to Gq and mobilizes intracellular calcium ions to mediate platelet shape change and aggregation. The second ADP receptor required for aggregation (variously called P2Y(ADP), P2Y(AC), P2Ycyc or P2T(AC)) is coupled to the inhibition of adenylyl cyclase through Gi. The molecular identity of the Gi-linked receptor is still elusive, even though it is the target of efficacious antithrombotic agents, such as ticlopidine and clopidogrel and AR-C66096 (ref. 9). Here we describe the cloning of this receptor, designated P2Y12, and provide evidence that a patient with a bleeding disorder has a defect in this gene. Cloning of the P2Y12 receptor should facilitate the development of better antiplatelet agents to treat cardiovascular diseases.
Long-term follow-up of tandem high-dose therapy with autologous stem cell support for adults with high-risk age-adjusted international prognostic index aggressive non-Hodgkin Lymphomas: a GOELAMS pilot study.
Monjanel, Hélène; Deconinck, Eric; Perrodeau, Elodie; Gastinne, Thomas; Delwail, Vincent; Moreau, Anne; François, Sylvie; Berthou, Christian; Gyan, Emmanuel; Milpied, Noël
Single high-dose therapy (HDT) followed by autologous peripheral blood stem cell (PBSC) support improves complete response and overall survival (OS) in untreated aggressive non-Hodgkin's lymphoma (NHL). However, patients with a high age-adjusted international prognostic index (aa-IPI equal to 3) still have poor clinical outcome despite high dose intensity regimen. To improve complete response in this subgroup, the French Groupe Ouest-Est des Leucémies et Autres Maladies du Sang (GOELAMS) conducted a pilot phase II trial (073) evaluating tandem HDT with PBSC support in a series of 45 patients with aa-IPI equal to 3 untreated aggressive non-Hodgkin's lymphoma. After induction with an anthracyclin-containing regimen, responders underwent tandem HDT conditioned by high-dose mitoxantrone plus cytarabine for the first HDT and total-body irradiation (TBI), carmustine, etoposide, and cyclophosphamide for the second HDT. Thirty-one patients out of 41 evaluable patients completed the program. There were 4 toxic deaths. The complete response rate was 49%. With a median follow-up of 114 months for surviving patients, the OS was 51%, and 19 out of the 22 patients (86%) who reached a complete response are alive and relapse-free. Recent prospective evaluation of quality of life and comorbidities of surviving patients does not reveal long-term toxicities of the procedure. In the era of monoclonal antibodies and response-adapted therapy, the role of tandem HDT still need to be determined.
ten Berg, J.M.; van Werkum, J.W.; Heestermans, A.A.C.M.; Jaarsma, W.; Hautvast, R.M.A.; den Heijer, P.; de Boer, M.J.
Background Anticoagulation after coronary stenting is essential to prevent stent thrombosis. Drug-eluting stents, which are the preferred therapy, may be associated with a higher tendency for stent thrombosis. Methods Patients who underwent coronary stent placement and presented with late stent thrombosis are described. Results Eight patients with stent thrombosis are presented. Early discontinuation of the antithrombotic medication is associated with the occurrence of these complications. Conclusion Long-term antithrombotic therapy seems essential to prevent stent thrombosis, especially for patients treated with drug-eluting stents. PMID:25696663
Fisher, Caroline A; Sewell, Katherine; Brown, Anahita; Churchyard, Andrew
Aggression is commonly reported in individuals with Huntington's disease (HD). While correlating factors for aggression are often speculated about, features that are associated with, and contribute to, aggression in this population have not been clearly determined. This systematic review investigates rates of aggression and treatment options for aggression in HD. A number of key findings were revealed. Studies reporting on rates of aggression revealed that its prevalence is high, falling between 22 and 66 percent in the majority of studies. Aggression may be more common in males with HD, and is also found in higher rates in individuals who experience frequent falls, have obsessive-compulsive symptoms and suicidal ideation. There is little research investigating antecedents for aggression in HD. A wide variety of psychotropic medications have been reported in the literature to treat individuals with HD and aggressive behaviour. However, due to methodological limitations, no treatment recommendations can be made, based on the current literature. Two non-medication therapies have been investigated, behaviour support and sensory modulation intervention. However, again, due to methodological limitations with these studies, further research is needed before they can be recommended as frontline interventions. This review highlights the need for further methodologically rigorous studies investigating the treatment of aggression in HD.
Ozawa, Hikaru; Abiko, Yasushi; Akimoto, Takeshi
The developments and trends of hemostatic and antithrombotic drugs in Japan were investigated chronologically for the last 50 years after the 2nd World War. 1. Hemostatic drugs are classified into three groups ; capillary stabilizers, blood coagulants and antifibrinolytics. l) As to capillary stabilizers, flavonoid (rutin, 1949), adrenochrome derivative (carbazochrome, 1954) and conjugated estrogen (Premarin, 1964) were introduced therapeutically. Especially, the soluble types of adrenochrome compounds (Adona 1956, S-Adchnon, 1962) were devised and used widely in Japan. 2) Drugs concerning blood coagulation, thrombin, introduced in 1953, and hemocoagulase, a snake venom introduced in 1966, were used clinically. V.K. groups producing various coagulation factors were introduced as V.K1 (Phytonadione, 1962) and V.K2 (rnenatetrenone,1972), and they were admitted in "The Japanese Pharmacopoeia"editions 8 and 14, respectively). 3) Regarding antifibrinolytic drugs, Japanese researchers have made remarkable contributions. e-Aminocapronic acid (Ipsilon, 1962) and tranexamic acid (Transamin, 1965) were developed and used for various abnormal bleedings or hemorrhage associated with plasmin over-activation. tranexamic acid also proved to suppress inflammations of the throat such as tonsillitis, pharyngitis or laryngitis. 2. Antithrombotic drugs are also divided into three groups; anticoagulants, antiplatelet drugs and fibrinolytics.1) The anticoagulants used therapeutically by injection are heparins (Na-salt, 1951; Ca-salt, 1962) and low-molecular-weight heparins such as dalteparin (1992), parnaparin (1994) and reviparin (1999). The low molecule compounds are superior to the original heparins in reducing the risk of bleeding. As oral anticoagulants, coumarin derivatives, dicumarol (1950), ethylbiscoumacetate (1954), phenylindandione (1956) and warfarin (1962) are known. Warfarin potassium is the main drug for oral therapy of thromboembolism lately. Gabexate mesilate (1989) and
Ono, Satoshi; Fujishiro, Mitsuhiro; Ikeda, Yuichi; Komuro, Issei; Koike, Kazuhiko
In 2012, the Japan Gastroenterological Endoscopy Society (JGES) revised guidelines for the management of gastrointestinal endoscopy for patients using antithrombotic agents. The conventional guidelines emphasized reducing the bleeding risk that accompanies gastrointestinal endoscopy, but the present guidelines prioritize reduction of thromboembolism risk during discontinuation of antithrombotic agents, which is consistent with Western guidelines. When the advantages outweigh the disadvantages, the guidelines permit endoscopic biopsy and high-bleeding-risk procedures without discontinuation of selected antithrombotic agents. These guidelines created a paradigm shift that has slowly, but surely, changed clinical daily practice in Japan. As a result, endoscopic biopsy without discontinuation of antithrombotic agents has been widely accepted, although solid evidence for its support is still lacking. Additionally, feasibility of high-bleeding-risk procedures without discontinuation of selected antithrombotic agents is also controversial because evidence newly acquired after publication of the present guidelines is low in evidence level. Consequently, clinical studies with a high evidence level, including randomized controlled studies, are mandatory to establish reliable upcoming guidelines. At the same time, under the present guidelines, the accomplishment of such studies in Japan is expected.
Reviews the acute effects of alcohol on aggressive responding. From experimental studies that use human subjects, it is concluded that a moderate dose of alcohol does not increase aggression if subjects are unprovoked. Under provocative situations, aggression is increased as a function of alcohol intoxication, provided that subjects are restricted…
Stratton, J.R.; Ritchie, J.L.
Patients with left ventricular thrombi not caused by recent myocardial infarction were prospectively studied by indium-111 platelet imaging and two-dimensional echocardiography to determine the reproducibility of these techniques and the short-term effects of sulfinpyrazone (200 mg four times daily), aspirin (325 mg three times daily) plus dipyridamole (75 mg three times daily), and full-dose warfarin. At baseline, all patients underwent indium-111 platelet imaging and echocardiography, and the results were positive for thrombus. In six patients on no antithrombotic drug therapy, repeat platelet scans and echocardiographic studies at 6.0 +/- 3.3 weeks remained positive and were unchanged. In seven patients studied on sulfinpyrazone, three platelet scans became negative, two became equivocal, and two were unchanged; the presence and size of thrombus was constant by echocardiography in all seven patients. Of the six patients studied on aspirin plus dipyridamole, one platelet scan became negative, those of three became equivocal, and two were unchanged; all echocardiographic findings remained positive, but one patient had decreased thrombus size. Among four warfarin-treated patients, three had resolution of platelet deposition and one was unchanged; by echocardiography, thrombus resolved in one patient, was decreased in size in one, and was unchanged in two. We conclude that, in the absence of antithrombotic drug therapy, platelet imaging and echocardiographic findings are stable in patients with left ventricular thrombi not caused by recent myocardial infarction. Sulfinpyrazone, aspirin plus dipyridamole, and warfarin all interrupt platelet deposition in some patients with chronic left ventricular thrombi.
Drozd, N N; Miftakhova, N T; Savchik, E Iu; Kalinina, T B; Makarov, V A; Imbs, T I; Zviagintseva, T N; Kuznetsova, T A; Besednova, N N
The antithrombotic and hemorrhagic activities of fucoidan with molecular weight within 20 - 40 kD isolation from Fucus evanescens seaweed have been investigated. The antithrombin activity of fucoidan is 41 +/- 9 aIIa IU/mg and the anti-factor Oà activity is 38 +/- 8 aOà IU/mg. The antithrombin and anti-factor Oà activities of plasma, antithrombotic activity (100% prevention of formation of a blood clot observed at a dose of 10 mg/kg), and hemorrhagic activity (to a lesser degree, than that of unfractionated heparin in comparable antithrombotic activity doses) increase as the doses of fucoidan increases from 2.5 to 10 mg/kg at intravenous injection in rats.
Versteven, Marijke; Vanden Broeck, Lies; Geurten, Bart; Zwarts, Liesbeth; Decraecker, Lisse; Beelen, Melissa; Göpfert, Martin C; Heinrich, Ralf; Callaerts, Patrick
Aggression is a universal social behavior important for the acquisition of food, mates, territory, and social status. Aggression in Drosophila is context-dependent and can thus be expected to involve inputs from multiple sensory modalities. Here, we use mechanical disruption and genetic approaches in Drosophila melanogaster to identify hearing as an important sensory modality in the context of intermale aggressive behavior. We demonstrate that neuronal silencing and targeted knockdown of hearing genes in the fly's auditory organ elicit abnormal aggression. Further, we show that exposure to courtship or aggression song has opposite effects on aggression. Our data define the importance of hearing in the control of Drosophila intermale aggression and open perspectives to decipher how hearing and other sensory modalities are integrated at the neural circuit level.
Cai, Tian-Quan; Wu, Weizhen; Shin, Myung K; Xu, Yiming; Jochnowitz, Nina; Zhou, Yuchen; Hoos, Lizbeth; Bentley, Ross; Strapps, Walter; Thankappan, Anil; Metzger, Joseph M; Ogletree, Martin L; Tadin-Strapps, Marija; Seiffert, Dietmar A; Chen, Zhu
This report aims at exploring quantitatively the relationship between FXII inhibition and thromboprotection. FXII full and partial null in rats were established via zinc finger nuclease-mediated knockout and siRNA-mediated knockdown, respectively. The rats were subsequently characterized in thrombosis and hemostasis models. Knockout rats exhibited complete thromboprotection in both the arteriovenous shunt model (∼100% clot weight reduction) and the FeCl3-induced arterial thrombosis model (no reduction in blood flow), without any increase in cuticle bleeding time compared with wild-type control rats. Ex-vivo aPTT and the ellagic acid-triggered thrombin generation assay (TGA) exhibited anticoagulant changes. In contrast, ex-vivo PT or high tissue factor-triggered TGA was indistinguishable from control. Rats receiving single doses (0, 0.01, 0.03, 0.1, 0.3, 1 mg/kg) of FXII siRNA exhibited dose-dependent knockdown in liver FXII mRNA and plasma FXII protein (95 and 99%, respectively, at 1 mg/kg) at day 7 post dosing. FXII knockdown was associated with dose-dependent thromboprotection (maximal efficacy achieved with 1 mg/kg in both models) and negligible change in cuticle bleeding times. Ex-vivo TGA triggered with low-level (0.5 μmol/l) ellagic acid tracked best with the knockdown levels and efficacy. Our findings confirm and extend literature reports of an attractive benefit-to-risk profile of targeting FXII for antithrombotic therapies. Titrating of FXII is instructive for its pharmacological inhibition. The knockout rat is valuable for evaluating both mechanism-based safety concerns and off-target effects of FXII(a) inhibitors. Detailed TGA analyses will inform on optimal trigger conditions in studying pharmacodynamic effects of FXII(a) inhibition.
Soukoulis, Victor; Boden, William E.; Smith, Sidney C.; O'Gara, Patrick T.
Acute coronary syndromes (ACS) constitute a spectrum of clinical presentations ranging from unstable angina and non-ST-segment elevation myocardial infarction to ST-segment myocardial infarction. Myocardial ischemia in this context occurs as a result of an abrupt decrease in coronary blood flow and resultant imbalance in the myocardial oxygen supply-demand relationship. Coronary blood flow is further compromised by other mechanisms that increase coronary vascular resistance or reduce coronary driving pressure. The goals of treatment are to decrease myocardial oxygen demand, increase coronary blood flow and oxygen supply, and limit myocardial injury. Treatments are generally divided into “disease-modifying” agents or interventions that improve hard clinical outcomes and other strategies that can reduce ischemia. In addition to traditional drugs such as beta-blockers and inhibitors of the reninangiotensin-aldosterone system, newer agents have expanded the number of molecular pathways targeted for treatment of ACS. Ranolazine, trimetazidine, nicorandil, and ivabradine are medications that have been shown to reduce myocardial ischemia through diverse mechanisms and have been tested in limited fashion in patients with ACS. Attenuating the no-reflow phenomenon and reducing the injury compounded by acute reperfusion after a period of coronary occlusion are active areas of research. Additionally, interventions aimed at ischemic pre- and post-conditioning may be useful means by which to limit myocardial infarct size. Trials are also underway to examine altered metabolic and oxygen-related pathways in ACS. This review will discuss traditional and newer anti-ischemic therapies for patients with ACS, exclusive of revascularization, anti-thrombotic agents, and the use of high-intensity statins. PMID:24902977
Gyawali, Rajesh; Bhattarai, Bhagabat
Aggressive periodontitis is a type of periodontitis with early onset and rapid progression and mostly affecting young adults who occupy a large percentage of orthodontic patients. The role of the orthodontist is important in screening the disease, making a provisional diagnosis, and referring it to a periodontist for immediate treatment. The orthodontist should be aware of the disease not only before starting the appliance therapy, but also during and after the active mechanotherapy. The orthodontic treatment plan, biomechanics, and appliance system may need to be modified to deal with the teeth having reduced periodontal support. With proper force application and oral hygiene maintenance, orthodontic tooth movement is possible without any deleterious effect in the tooth with reduced bone support. With proper motivation and interdisciplinary approach, orthodontic treatment is possible in patients with controlled aggressive periodontitis.
Aggressive periodontitis is a type of periodontitis with early onset and rapid progression and mostly affecting young adults who occupy a large percentage of orthodontic patients. The role of the orthodontist is important in screening the disease, making a provisional diagnosis, and referring it to a periodontist for immediate treatment. The orthodontist should be aware of the disease not only before starting the appliance therapy, but also during and after the active mechanotherapy. The orthodontic treatment plan, biomechanics, and appliance system may need to be modified to deal with the teeth having reduced periodontal support. With proper force application and oral hygiene maintenance, orthodontic tooth movement is possible without any deleterious effect in the tooth with reduced bone support. With proper motivation and interdisciplinary approach, orthodontic treatment is possible in patients with controlled aggressive periodontitis. PMID:28299350
Daste, Thomas; Dossin, Olivier; Reynolds, Brice S; Aumann, Marcel
A domestic shorthair cat was referred for progressive muscle weakness and dyspnoea. The cat had a 2-month history of severe weight loss, small intestinal diarrhoea, polyphagia and polyuria/polydipsia. Biochemical analysis and venous blood gas evaluation revealed severe hypokalaemia [1.7 mmol/l; reference interval (RI): 3.5-5.1 mmol/l] and hypoventilation (partial pressure of carbon dioxide = 68 mmHg; RI: 34-38 mmHg). Aggressive potassium supplementation was initiated. The cat was manually ventilated until serum potassium increased to 3 mmol/l. A diagnosis of exocrine pancreatic insufficiency (EPI) was made based on clinical signs and serum feline trypsin-like immunoreactivity (0.1 μg/l; RI: 12-82 μg/l). Medical management of the EPI resulted in clinical recovery.
Kucharewicz, Iwona; Pawlak, Robert; Matys, Tomasz; Pawlak, Dariusz; Buczko, Wlodzimierz
It is well established that renin-angiotensin system blockers exert NO/prostacyclin-dependent antithrombotic effects. Because some beneficial effects of these drugs are mediated by angiotensin (Ang)-(1-7), in the present study we examined if their antithrombotic action could be mediated by Ang-(1-7). Intravenous infusion of Ang-(1-7) (1, 10, or 100 pmol/kg per minute for 2 hours) into rats developing venous thrombosis caused 50% to 70% reduction of the thrombus weight. This effect was dose-dependently reversed by cotreatment with A-779 (selective Ang-[1-7] receptor antagonist) or EXP 3174 (angiotensin type 1 receptor antagonist) but not by PD 123,319 (angiotensin type 2 receptor antagonist). Similarly, the antithrombotic effects of captopril (ACE inhibitor) and losartan (angiotensin type 1 receptor blocker) were attenuated by A-779 in a dose-dependent manner. The effect of Ang-(1-7) was completely abolished by concomitant administration of NO synthase inhibitor (N(G)-nitro-L-arginine methyl ester) and prostacyclin synthesis inhibitor (indomethacin), as has been shown previously for captopril and losartan. Thus, the antithrombotic effect of renin-angiotensin system blockers involves Ang-(1-7)-evoked release of NO and prostacyclin.
Martínez-Sánchez, Gregorio; Delgado-Roche, Livan; Díaz-Batista, Arquímides; Pérez-Davison, Gema; Re, Lamberto
Coronary artery disease (CAD) is the most common cause of sudden death, and death of people over 20 years of age. Because ozone therapy can activate the antioxidant system and improve blood circulation and oxygen delivery to tissue, the aim of this study was to investigate the therapeutic efficacy of ozone in patients with CAD, treated with antithrombotic therapy, Aspirin and policosanol. A randomized controlled clinical trial was performed with 53 patients divided into two groups: one (n=27) treated with antithrombotic therapy and other (n=26) treated with antithrombotic therapy plus rectal insufflation of O(3). A parallel group (n=50) age and gender matched was used as reference for the experimental variables. The efficacy of the treatments was evaluated by comparing hemostatic indexes and biochemical markers of oxidative stress in both groups after 20 day of treatment. Ozone treatment significantly (P<0.001) improved prothrombin time when compared to the antithrombotic therapy only group, without modifying bleeding time. Combination antithrombotic therapy+O(3) improved the antioxidant status of patients reducing biomarkers of protein and lipid oxidation, enhancing total antioxidant status and modulating the level of superoxide dismutase and catalase with a 57% and 32% reduction in superoxide dismutase and catalase activities respectively, moving the redox environment to a status of low production of O(2)(•-) with an increase in H(2)O(2) detoxification. No side effects were observed. These results show that medical ozone treatment could be a complementary therapy in the treatment of CAD and its complications.
Lehmann, C; Wyen, C; Hoffmann, C; Fätkenheuer, G
Treatment of AIDS-related malignant lymphoma (ARL) remains a therapeutic challenge. There are concerns not only about infectious and haematological complications in HIV-infected patients during intensive chemotherapy, but also about potential interactions between chemotherapy and highly active antiretroviral therapy (HAART). Current data on patients treated concomitantly with intensive chemotherapy and HAART are limited, and no data exist on patients with ARL suffering from active opportunistic infections. We report the case of a 38-year-old man with advanced HIV-1 infection, pulmonary tuberculosis and Burkitt's lymphoma. Intensive chemotherapy was administered in parallel with tuberculostatic therapy and HAART. Six months later, the patient achieved not only a complete remission of Burkitt's lymphoma and sustained viral suppression, but also a full recovery from tuberculosis. This case report provides some useful observations on the successful application of intensive chemotherapy in addition to tuberculostatic therapy and HAART in HIV-infected patients.
Lejeune, A; Skorupski, K; Frazier, S; Vanhaezebrouck, I; Rebhun, R B; Reilly, C M; Rodriguez, C O
This retrospective case series evaluates the outcome of 21 dogs with grade II stage 2 mast cell tumour (MCT) treated with adequate local therapy and adjuvant systemic chemotherapy (prednisone, vinblastine and CCNU). The median survival for all dogs was 1359 days (range, 188-2340). Median disease-free interval was 2120 days (149-2325 days). Dogs treated with surgery and chemotherapy had shorter survival (median, 1103 days; 188-2010 days) than those that underwent surgery, radiation therapy and chemotherapy as part of their treatment (median, 2056 days; 300-2340 days). Two patients had local recurrence in the radiation field and four patients had de novo MCT. Distant metastasis was not observed in any dogs. The results of this study suggest that, in the presence of loco-regional lymph node metastasis in grade II MCT, the use of prednisone, vinblastine and CCNU after adequate local-regional therapy can provide a median survival in excess of 40 months.
Handling aggressive dogs and cats in the veterinary clinic can be frustrating, time consuming, and injurious for both employee and animal. This article discusses the etiology of the aggressive dog and cat patient and how best to approach these cases. A variety of handling techniques, safety products, and drug therapy are reviewed.
Studies comparing aggressive and nonaggressive prisoners show higher testosterone levels among the former. While there is limited evidence for a strong association between aggressiveness and testosterone during adolescence, other studies indicate that testosterone levels are responsive to influences from the social environment, particularly those…
Underwood, Marion K.
Noting recent interest in girls' social or "relational" aggression, this volume offers a balanced, scholarly analysis of scientific knowledge in this area. The book integrates current research on emotion regulation, gender, and peer relations, to examine how girls are socialized to experience and express anger and aggression from infancy…
Lane, Scott D.; Kjome, Kimberly L.; Moeller, F. Gerard
Synopsis Aggression is a serious medical problem that can place both the patient and the health care provider at risk. Aggression can result from medical, neurologic and or psychiatric disorders. A comprehensive patient evaluation is needed. Treatment options include pharmacotherapy as well as non-pharmacologic interventions, both need to be individualized to the patient. PMID:21172570
Barrick, Ann Louise; And Others
Although humor is an important phenomenon in human interactions, it has rarely been studied in the elderly. An understanding of responses to humor in aggressive cartoons as a function of advancing age would provide information regarding both the development of humor and the negative (aggressive) emotional experiences of the elderly. This study was…
Brown, Serena-Lynn; And Others
Decreased serotonin function has consistently been shown to be highly correlated with impulsive aggression across a number of different experimental paradigms. Such lowered serotonergic indices appear to correlate with the dimension of aggression dyscontrol and/or impulsivity rather than with psychiatric diagnostic categories per se. Implications…
Goldstein, Arnold P.; And Others
Structured Learning Therapy (SLT) teaches aggressive adolescents prosocial skills (negotiation, self-relaxation, and anger control) by modeling, role playing, social reinforcement, and transfer of training. This article summarizes initial application of SLT with psychiatric clients, includes guidelines for improving trainee-trainer-treatment…
Allison, David B.; And Others
This case study of a 24-year-old man with autistic disorder and mental retardation who exhibited aggression found that antecedent exercise significantly decreased aggression; drug therapy with an anxiolytic (lorazepam) alone had no significant effect on aggression; and exercise plus medication decreased aggression to a somewhat lesser degree than…
Manuel, Edwin R.; Chen, Jeremy; D'Apuzzo, Massimo; Lampa, Melanie G.; Kaltcheva, Teodora I.; Thompson, Curtis B.; Ludwig, Thomas; Chung, Vincent; Diamond, Don J.
Bacterial-based therapies are emerging as effective cancer treatments and hold promise for refractory neoplasms such as pancreatic ductal adenocarcinoma (PDAC), which has not shown significant improvement in therapy for over twenty-five years. Using a novel combination of shIDO-ST, a Salmonella-based therapy targeting the immunosuppressive molecule indoleamine 2,3-dioxygenase (IDO), with an enzyme, PEGPH20, which depletes extracellular matrix hyaluronan, we observed extended survival with frequent total regression of autochthonous and orthotopic PDAC tumors. This was associated with migration and accumulation of activated polymorphonuclear neutrophils (PMN) from spleens into tumors, which was not observed using a scrambled control (shScr-ST). Purified splenic PMNs from PEGPH20/shIDO-ST-treated mice exhibited significant IDO knockdown and were able to kill tumor targets ex-vivo through mechanisms involving FasL and serine proteases. In addition, CD8+ T cells were observed to contribute to late control of pancreatic tumors. Collectively, our data demonstrate that entry of shIDO-ST and PMNs into otherwise impermeable desmoplastic tumors is facilitated by PEGPH20-mediated HA removal, further highlighting an important component of effective treatment for PDAC. PMID:26134178
Weichselbaum, R.R.; Posner, M.R.; Ervin, T.J.; Fabian, R.L.; Miller, D.
A combined modality regimen employing induction chemotherapy with cisplatinum, bleomycin and methotrexate followed by surgery and/or radiation therapy was initiated in patients with advanced squamous cell carcinoma of the head and neck. In the first 23 patients treated with this program there was a 90% response rate to induction chemotherapy (9% CR and 81% PR). Toxicity associated with radiotherapy, but not surgery, was increased with 11 of 23 patients (48%) who experienced some toxicity during or immediately after radiotherapy. Mucositis was worse than expected and severe delayed mucositis was seen in 2 patients, one of whom required hospitalization. Late complications, possibly related to therapy included one myocardial infarction and one episode of hypoglycemia, both of which were fatal. One other patient voluntarily failed to take prescribed oral leucovorin, dying of unrescued methotrexate toxicity during adjuvant therapy, a questionable suicide. Further follow-up analysis of failure will be necessary to determine if the value of a combined modality regimen in producing an increased cure rate and long term survival will out weigh increased toxicity.
Burton, Robert W
Viewing aggression in its healthy form, in contrast to its extreme and inappropriate versions, and sport as a health-promoting exercise in psychological development and maturation may allow participants and spectators alike to retain an interest in aggression and sport and derive further enjoyment from them. In addition, it will benefit all involved with sport to have a broader understanding of human aggression. Physicians, mental health professionals, and other health care providers can be influential in this process, and should be willing to get involved and speak out when issues and problems arise.
Makutani, Shiro; Kichikawa, Kimihiko; Uchida, Hideo; Maeda, Munehiro; Konishi, Noboru; Hiasa, Yoshio; Yoshikawa, Tomohiro; Kimura, Yukio
Purpose: To evaluate the efficacy of antithrombotic agents in the prevention of stenosis of polytetrafluoroethylene (PTFE)-covered stents in the venous system. Methods: Spiral Z stents covered with PTFE (PTFE-covered stents) were placed in the inferior vena cava (IVC) of 34 dogs. Nineteen dogs, used as a control group, were sacrificed at 2, 4, and 12 weeks. Fifteen dogs, previously given antithrombotic agents [cilostazol (n= 5), warfarin potassium (n= 5), cilostazol plus warfarin potassium (n= 5)] were sacrificed at 4 weeks, and then examined angiographically and histopathologically. The effect of the antithrombotic agents was compared between groups. Results: The patency rate of the antithrombotic agent group was 93% (14/15), which was higher than the control group rate of 63% (12/19). The mean stenosis rate of the patent stent at both ends and at the midportion was lower at 4 weeks in the antithrombotic agent group than in the control group. In particular, the mean stenosis rate in the cilostazol plus warfarin potassium group was significantly lower than the control group (Tukey's test, p < 0.05). The mean neointimal thickness of the patent stent at both ends and at the midportion was thinner at 4 weeks in the antithrombotic agent group than in the control group. In particular, the thickness of the neointima in the cilostazol plus warfarin potassium group was significantly decreased when compared with the control group (Tukey's test p < 0.05). At 4 weeks, endothelialization in the antithrombotic agent group tended to be almost identical to that in the control group. Conclusion: The present study suggests that administration of an antithrombotic agent is an effective way of preventing the stenosis induced by a neointimal thickening of PTFE-covered stents in the venous system.
Whitaker, Regina Navonne
Previous research has indicated that preschoolers identified for aggressive behavior would benefit from family, group, or individual therapy. However, there remains an important gap in the current literature regarding treatments for aggressive behavior based on the subtype of aggression. The purpose of this pilot study was to examine if 2…
Li, Cheng-Hung; Liu, Chia-Jen; Chou, Annie Y.; Chao, Tze-Fan; Tuan, Ta-Chuan; Chen, Su-Jung; Wang, Kang-Ling; Lin, Yenn-Jiang; Chang, Shih-Lin; Lo, Li-Wei; Hu, Yu-Feng; Chung, Fa-Po; Liao, Jo-Nan; Chen, Tzeng-Ji; Wu, Tsu-Juey; Chen, Shih-Ann
This study compared the risk of mortality in atrial fibrillation (AF) patients treated adherent to the 2012 European Society of Cardiology (ESC) guidelines for stroke prevention and those who were not treated according to guideline recommendations. This study used the Taiwan National Health Insurance Research Database. From 1996 to 2011, 354,649 newly diagnosed AF patients were identified as the study population. Among the study cohort, 45,595 and 309,054 patients were defined as Guideline-Adherent and Non-Adherent groups, respectively. During the follow up of 1,480,280 person-years, 133,552 (37.7%) patients experienced mortality. The risk of mortality was lower among AF patients whose treatment was adherent to the guideline recommendation for stroke prevention than those whose treatment was not (annual risk of mortality = 4.3% versus 10.0%) with an adjusted hazard ratio of 0.62 (95% confidence interval = 0.61–0.64, p value < 0.001) after adjusting for age, gender, CHA2DS2-VASc score and antiplatelet therapy. The findings were consistently observed after propensity matching analysis. In conclusion, the risk of mortality was lower for AF patients who were treated according to the antithrombotic recommendations of the 2012 ESC guidelines, guided by the CHA2DS2-VASc score. Better efforts to implement guidelines would lead to improved outcomes for patients with AF. PMID:27498702
Fehr, Karla K.; Russ, Sandra W.
Research Findings: Pretend play is an essential part of child development and adjustment. However, parents, teachers, and researchers debate the function of aggression in pretend play. Different models of aggression predict that the expression of aggression in play could either increase or decrease actual aggressive behavior. The current study…
Yaghy, Momen; Murin, J; Pernicky, M; Pekarovicova, Z; Mikes, P
For over two decades, valuable insights have been accumulated from epidemiologic studies and randomized trials about the risks and prevention of atrial fibrillation. Atrial fibrillation (AF) substantially raises the risk of stroke, most likely through an atrio-embolic mechanism. Warfarin and other members of its class of oral anticoagulants targeted at an international normalized ratio (INR) of 2.5 can abrogate the risk of stroke attributable to AF effectively and fairly safely. High-quality management of anticoagulation can be achieved in usual clinical care. These insights have important implications for the care of individual patients and more generally for public health. Future research is needed to specify the risk of stroke and hemorrhage among patients with AF better, particularly among older individuals, to optimize use of antithrombotic agents, and to define the role of recently developed antithrombotic drugs and invasive nondrug approaches (Tab. 3, Ref. 20). Full Text (Free, PDF) www.bmj.sk.
Gui, Meng; Song, Juyi; Zhang, Lu; Wang, Shun; Wu, Ruiyun; Ma, Changwei; Li, Pinglan
Chondroitin sulfates (CSs) were extracted from sturgeon skull and backbone, and their chemical composition, anticoagulant, anti-platelet and thrombolysis activities were evaluated. The average molecular weights of CS from sturgeon skull and backbone were 38.5kDa and 49.2kDa, respectively. Disaccharide analysis indicated that the sturgeon backbone CS was primarily composed of disaccharide monosulfated in position four of the GalNAc (37.8%) and disaccharide monosulfated in position six of the GalNAc (59.6%) while sturgeon skull CS was primarily composed of nonsulfated disaccharide (74.2%). Sturgeon backbone CS showed stronger antithrombotic effect than sturgeon skull CS. Sturgeon backbone CS could significantly prolong activated partial thromboplastin time (APTT) and thrombin time (TT), inhibited ADP-induced platelet aggregation and dissolved platelet plasma clots in vitro. The results suggested that sturgeon backbone CS can be explored as a functional food with antithrombotic function.
Tomaru, Takanobu; Nakamura, Fumitaka; Miwa, Atsuko; Fujimori, Yoshiharu; Uchida, Yasumi
Anti-thrombotic and thrombolytic effects of anti-thrombin agent (Argatroban;Arg 0.5 mg/kg) was evaluated by angioscopy and compared with heparin (250 U/kg). Occlusive thrombus was produced in canine iliac artery by balloon injury. At another side, balloon denudation was attempted at 20 minutes after the administration of the agent. One hour thrombus was control. Angioscopic percent luminal obstruction with thrombus reduced by Arg (from 69 to 32%, P < 0.0001), but not by heparin (from 53% to 59%). Both agents had antithrombotic effects and prevented thrombus formation. The activated partial thromboplastin time (APTT) prolonged to 190% with argatroban and 1253% with heparin (P < 0.0001). Thus, antithrombin agent has both preventive effect of thrombosis and thrombolytic effect without marked prolongation of the APTT.
Herrera Chalé, Francisco; Ruiz Ruiz, Jorge Carlos; Betancur Ancona, David; Acevedo Fernández, Juan José; Segura Campos, Maira Rubi
Hydrolysates and peptide fractions (PF) obtained from M. pruriens protein concentrates with commercial and digestive enzymatic systems were studied for their hypolipidemic and antithrombotic activities. Hydrolysates obtained with Pepsin-Pancreatin (PP) and their peptide fractions inhibited cholesterol micellar solubility with a maximum value of 1.83% in PP. Wistar rats were used to evaluate the hypolipidemic effect of hydrolysates and PF. The higher reductions of cholesterol and triglyceride levels were exhibited by PP and both peptide fractions <1 kDa obtained from PP and Alcalase®-Flavourzyme® hydrolysate (AF) at a dose of 15 mg kg(-1) of animal weight. PF > 10 kDa from both hydrolysates showed the maximum antithrombotic activity with values of 33.33% for PF > 10 kDa from AF and 31.72% for PF > 10 kDa from PP. The results suggest that M. pruriens bioactive peptides with the hypolipidemic effect and antithrombotic activity might be utilized as nutraceuticals.
Li, Zhelong; Cui, Haipo; Shang, Kun; Liao, Yuehua; Zhou, Xun
In an anti-thrombotic pressure circulatory device, relays and solenoid valves serve as core execution units. Thus the therapeutic efficacy and patient safety of the device will directly depend on their performance. A new type of testing system for relays and solenoid valves used in the anti-thrombotic device has been developed, which can test action response time and fatigue performance of relay and solenoid valve. PC, data acquisition card and test platform are used in this testing system based on human-computer interaction testing modules. The testing objectives are realized by using the virtual instrument technology, the high-speed data acquisition technology and reasonable software design. The two sets of the system made by relay and solenoid valve are tested. The results proved the universality and reliability of the testing system so that these relays and solenoid valves could be accurately used in the antithrombotic pressure circulatory equipment. The newly-developed testing system has a bright future in the aspects of promotion and application prospect.
Souza, Racquel O S; Assreuy, Ana M S; Madeira, Juliana C; Chagas, Francisco D S; Parreiras, Luane A; Santos, Gustavo R C; Mourão, Paulo A S; Pereira, Maria G
Polysaccharides were extracted from the barks of Geoffroea spinosa, purified using anion exchange chromatography and characterized by chemical and methylation analysis, complemented by infrared and NMR spectroscopies. These polysaccharides were tested for their anticoagulant, antithrombotic and antiplatelet activities and also for their effects on bleeding. Unfractionated polysaccharide contains low levels of protein and high levels of carbohydrate (including hexuronic acid). The purified polysaccharides (fractions FII and FIII) are composed of arabinose (Ara), rhamnose (Rha), hexuronic acid, small amounts of galactose, but no sulfate ester. They have highly complex structure, which was partially characterized. NMR and methylation analysis indicate that the polysaccharides have a core of α-Rhap and branches of 5-linked α-Araf. Residues of 4-linked α-GalpA are also found in the structure. The unfractionated (TPL) and fraction FIII, but not fractions FI and FII, prolonged the activated partial thromboplastin time (aPTT). TPL, FII and FIII inhibited the platelet aggregation induced by ADP. More significantly, both unfractionated and purified fractions exhibited potent antithrombotic effect (31-60%) and the fractions did not modify the bleeding tendency. These plant polysaccharides could be alternative source of new anticoagulant, antiplatelet and antithrombotic compounds devoid of the undesirable risk of hemorrhage.
Xin, Meng; Ren, Li; Sun, Yang; Li, Hai-hua; Guan, Hua-Shi; He, Xiao-Xi; Li, Chun-Xia
Propylene glycol alginate sodium sulfate (PSS), a sulfated polysaccharide derivative, has been used as a heparinoid drug to prevent and treat hyperlipidemia and ischemic cardio-cerebrovascular diseases in China for nearly 30 years. To extend the applications of PSS, a series of low-molecular-weight PSSs (named FPs) were prepared by oxidative-reductive depolymerization, and the antithrombotic activities were investigated thoroughly in vitro and in vivo. The bioactivity evaluation demonstrated a positive correlation between the molecular weight and the anticoagulant and antithrombotic activities of FPs. FPs could prolong the APTT and clotting time and reduce platelet aggregation significantly. FPs could also effectively inhibit factor IIa in the presence of AT-III and HC-II. FPs decreased the wet weights and lengths of the thrombus and increased occlusion times in vivo. FP-6k, a PSS fragment with a molecular weight of 6 kDa, is an optimal antithrombotic candidate for further study and showed little chance for hemorrhagic action.
Cervetti, Giulia; Ghio, Francesco; Cecconi, Nadia; Morganti, Riccardo; Galimberti, Sara; Petrini, Mario
Splenic marginal zone lymphoma (SMZL) is an indolent disease that typically affects elderly patients. Thanks to its outcome, most patients don't need any specific therapy and 'a watch and wait' policy is frequently employed. Treatment is required in symptomatic cases. Splenectomy remains one of the first line options in patients fit for surgery. The best pharmacological strategy has not yet been identified for poor surgical risk cases. Amongst different possible chemotherapeutic approaches, alkylating agents, alone or in association with Rituximab, could employ in 'frail' patients. In the present study, the role of oral cyclophosphamide (100 mg per day for 15 consecutive days, every 30 for a total of six cycles) associated with anti-CD20 monoclonal antibody has been evaluated in 30 newly diagnosed SMZL patients, not fit for splenectomy or more toxic chemotherapic regimens. Overall response rate was 87% (CR 70%; PR 17%). Median PFS was 20 months (range, 1-53), with better outcome for low-risk cases according to IIL score prognostic index. Toxicity profile resulted mild.
Lichtman, S M
Persons 65 years of age and older are the fastest growing segment of the United States population. Over the next 30 years they will comprise approximately 20% of the population. There will be a parallel rise in the number of patients with non-Hodgkin's lymphoma. Age has long been known to be an adverse prognostic factor. Clinical trials of older patients are complicated by the effect of comorbid illness, particularly its effect on overall survival. CHOP (cyclophosphamide, Adriamycin, vincristine, prednisone) remains the standard therapy for all patients with aggressive non-Hodgkin's lymphoma. There are a number of regimens which may be beneficial for older patients with significant comorbidity and poor performance status. The randomized trials in the elderly has reaffirmed CHOP and emphasize the need for adequate dosing, maintaining schedule and anthracyclines. Relapsed patients have a poor prognosis but selected fit older patients may benefit from aggressive reinduction regimens and possibly bone marrow transplantation. Future research should include defining the role of comorbidity, measurement of organ dysfunction and assessment of performance status with geriatric functional scales. New drug treatments should also be explored.
Swinnen, Lode J; Li, Hailun; Quon, Andrew; Gascoyne, Randy; Hong, Fangxin; Ranheim, Erik A; Habermann, Thomas M; Kahl, Brad S; Horning, Sandra J; Advani, Ranjana H
A persistently positive positron emission tomography (PET) scan during therapy for diffuse large B-cell lymphoma (DLBCL) is predictive of treatment failure. A response-adapted strategy consisting of an early treatment change to four cycles of R-ICE (rituximab, ifosfamide, carboplatin, etoposide) was studied in the Eastern Cooperative Oncology Group E3404 trial. Previously untreated patients with DLBCL stage III, IV, or bulky II, were eligible. PET scan was performed after three cycles of R-CHOP (rituximab, cyclophosphamide, doxorubicin, vincristine, prednisone) and scored as positive or negative by central review during the fourth cycle. PET-positive patients received four cycles of R-ICE, PET-negative patients received two more cycles of R-CHOP. A ≥ 45% 2-year progression-free survival (PFS) for mid-treatment PET-positive patients was viewed as promising. Of 74 patients, 16% were PET positive, 79% negative. The PET positivity rate was much lower than the 33% expected. Two-year PFS was 70%; 42% [90% confidence interval (CI), 19-63%] for PET-positives and 76% (90% CI 65-84%) for PET-negatives. Three-year overall survival (OS) was 69% (90% CI 43-85%) and 93% (90% CI 86-97%) for PET-positive and -negative cases, respectively. The 2-year PFS for mid-treatment PET-positive patients intensified to R-ICE was 42%, with a wide confidence interval due to the low proportion of positive mid-treatment PET scans. Treatment modification based on early PET scanning should remain confined to clinical trials.
Adam, Frédéric; Khatib, Abdel-Majid; Lopez, Jose Javier; Vatier, Camille; Turpin, Sabrina; Muscat, Adeline; Soulet, Fabienne; Aries, Anne; Jardin, Isaac; Bobe, Régis; Stepanian, Alain; de Prost, Dominique; Dray, Cédric; Rosado, Juan Antonio; Valet, Philippe; Feve, Bruno; Siegfried, Geraldine
Apelin peptide and its receptor APJ are directly implicated in various physiological processes ranging from cardiovascular homeostasis to immune signaling. Here, we show that apelin is a key player in hemostasis with an ability to inhibit thrombin- and collagen-mediated platelet activation. Mice lacking apelin displayed a shorter bleeding time and a prothrombotic profile. Their platelets exhibited increased adhesion and a reduced occlusion time in venules, and displayed a higher aggregation rate after their activation by thrombin compared with wild-type platelets. Consequently, human and mouse platelets express apelin and its receptor APJ. Apelin directly interferes with thrombin-mediated signaling pathways and platelet activation, secretion, and aggregation, but not with ADP and thromboxane A2-mediated pathways. IV apelin administration induced excessive bleeding and prevented thrombosis in mice. Taken together, these findings suggest that apelin and/or APJ agonists could potentially be useful adducts in antiplatelet therapies and may provide a promising perspective for patients who continue to display adverse thrombotic events with current antiplatelet therapies.
Wei, Huijun; Shang, Jin; Keohane, CarolAnn; Wang, Min; Li, Qiu; Ni, Weihua; O'Neill, Kim; Chintala, Madhu
Assessment of the bleeding risk of antithrombotic agents is usually performed in healthy animals with some form of vascular injury to peripheral organs to induce bleeding. However, bleeding observed in patients with currently marketed antithrombotic drugs is typically spontaneous in nature such as intracranial haemorrhage (ICH) and gastrointestinal (GI) bleeding, which happens most frequently on top of preexisting pathologies such as GI ulcerations and polyps. Apc(min/+) mice are reported to develop multiple adenomas through the entire intestinal tract and display progressive anaemia.In this study, we evaluated the potential utility of Apc(min/+) mice as a model for assessing spontaneous GI bleeding with antithrombotic agents. Apc(min/+) mice exhibited progressive blood loss starting at the age of nine weeks. Despite the increase in bleeding, Apc(min/+) mice were in a hypercoagulable state and displayed an age-dependent increase in thrombin generation and circulating fibrinogen as well as a significant decrease in clotting times. We evaluated the effect of warfarin, dabigatran etexilate, apixaban and clopidogrel in this model by administering them in diet or in the drinking water to mice for 1-4 weeks. All of these marketed drugs significantly increased GI bleeding in Apc(min/+) mice, but not in wild-type mice. Although different exposure profiles of these antithrombotic agents make it challenging to compare the bleeding risk of compounds, our results indicate that the Apc(min/+) mouse may be a sensitive preclinical model for assessing the spontaneous GI bleeding risk of novel antithrombotic agents.
Eron, Leonard D.; Huesmann, L. Rowell
As indicated by multiple measures (including overt criminal behavior), stability of aggressive behavior was investigated across 22 years for males and females in a variety of situations. Originally, subjects included the entire population enrolled in the third grade in a semi-rural county in New York State. The sample included approximately 870…
Vaaland, Grete Sorensen; Idsoe, Thormod; Roland, Erling
This study aims to conceptualize disobedient pupil behavior within the more general framework of antisocial behavior and to reveal how two forms of aggressiveness are related to disobedience. Disobedience, in the context of this article, covers disruptive pupil behavior or discipline problems when the pupil is aware of breaking a standard set by…
Huesmann, L. Rowell; Yarmel, Patty Warnick
Using data from a broader longitudinal study, this investigation explores within-subject and cross-generational stability of intellectual competence and the relationship of such stability to aggressive behavior. Data were gathered three times (when subjects' modal age was 8, 19, and 30 years). Initially, subjects included the entire population…
Young, Ellie L.; Nelson, David A.; Hottle, America B.; Warburton, Brittney; Young, Bryan K.
"Relational aggression" refers to harm within relationships caused by covert bullying or manipulative behavior. Examples include isolating a youth from his or her group of friends (social exclusion), threatening to stop talking to a friend (the silent treatment), or spreading gossip and rumors by email. This type of bullying tends to be…
Mills, Shari; Raine, Adrian
Brain imaging research allows direct assessment of structural and functional brain abnormalities, and thereby provides an improved methodology for studying neurobiological factors predisposing to violent and aggressive behavior. This paper reviews 20 brain imaging studies using four different types of neuroimaging techniques that were conducted in…
Brown, Gerald L.; Goodwin, Frederick K
The central nervous system transmitter serontonin may be altered in aggressive/impulsive and suicidal behaviors in humans. These reports are largely consistent with animal data, and constitute one of the most highly replicated set of findings in biological psychiatry. Suggests that some suicidal behavior may be a special kind of aggressive…
Duman, Sarah; Margolin, Gayla
This study examined children's aggressive and assertive solutions to hypothetical peer scenarios in relation to parents' responses to similar hypothetical social scenarios and parents' actual marital aggression. The study included 118 children ages 9 to 10 years old and their mothers and fathers. Children's aggressive solutions correlated with…
Page, Angela; Smith, Lisa F.
Both physical and relational aggression are characterised by the intent to harm another. Physical aggression includes direct behaviours such as hitting or kicking; relational aggression involves behaviours designed to damage relationships, such as excluding others, spreading rumours, and delivering threats and verbal abuse. This study extended…
Wang, Xi-Xu; Dong, Bo; Hong, Biao; Gong, Yi-Qun; Wang, Wei; Wang, Jue; Zhou, Zhen-Yu; Jiang, Wei-Jun
AIM To investigate the long-term prognosis in peptic ulcer patients continuing taking antithrombotics after ulcer bleeding, and to determine the risk factors that influence the prognosis. METHODS All clinical data of peptic ulcer patients treated from January 1, 2009 to January 1, 2014 were retrospectively collected and analyzed. Patients were divided into either a continuing group to continue taking antithrombotic drugs after ulcer bleeding or a discontinuing group to discontinue antithrombotic drugs. The primary outcome of follow-up in peptic ulcer bleeding patients was recurrent bleeding, and secondary outcome was death or acute cardiovascular disease occurrence. The final date of follow-up was December 31, 2014. Basic demographic data, complications, and disease classifications were analyzed and compared by t- or χ2-test. The number of patients that achieved various outcomes was counted and analyzed statistically. A survival curve was drawn using the Kaplan-Meier method, and the difference was compared using the log-rank test. COX regression multivariate analysis was applied to analyze risk factors for the prognosis of peptic ulcer patients. RESULTS A total of 167 patients were enrolled into this study. As for the baseline information, differences in age, smoking, alcohol abuse, and acute cardiovascular diseases were statistically significant between the continuing and discontinuing groups (70.8 ± 11.4 vs 62.4 ± 12.0, P < 0.001; 8 (8.2%) vs 15 (21.7%), P < 0.05; 65 (66.3%) vs 13 (18.8%), P < 0.001). At the end of the study, 18 patients had recurrent bleeding and three patients died or had acute cardiovascular disease in the continuing group, while four patients had recurrent bleeding and 15 patients died or had acute cardiovascular disease in the discontinuing group. The differences in these results were statistically significant (P = 0.022, P = 0.000). The Kaplan-Meier survival curve indicated that the incidence of recurrent bleeding was higher in patients
Del Rio, Paolo; Sozzi, Francesco; Bertocchi, Elisa; Dell'Abate, Paolo; Perrone, Gennaro; Arcuri, Maria Francesca; Sianesi, Mario
I trattamenti antipiastrinici sono comuni nel mondo occidentale ed il rischio di sanguinamento correlato a procedure chirurgiche o comunque invasive è di conseguenza elevato e pertanto abbiamo volute analizzare la correlazione tra la chirurgia del colon.retto ,la terapia antipiastrinica e le complicanze chirurgiche postoperatorie. Sono stati studiati 176 pazienti operati per tumori del colon-retto considerando i seguenti dati:tipo di intervento xchirurgico,l’indice di massa corporea (BMI), il valore dell’emoglobina (Hb); PT preoperatorio e le trasfusioni di sangue pre epost-operatorie e durante lo stesso intervento chirurgico. L’analisi si è concentrata su due gruppi :pazienti sottoposti a trattamento antipiastrinico (ATterapia antiaggregante) e pazienti non trattati ( NAT: non terapia antiaggregante piastrinica). Nei gruppi di pazienti sottoposti a emicolectomia destra, i valori di emoglobina erano più bassi neri pazienti che hanno ricevuto la terapia antitrombotica rispetto ai pazienti che non hanno ricevuto questa terapia, con una significatività statistica (p <0,05); dati analoghi sono stati osservati nei pazienti sottoposti a emicolectomia sinistra. I pazienti dipeso normale trattati con terapia antiaggregante avevano valori più bassi di emoglobina senza significatività statistica (valore di p non significativo). I pazienti in sovrappeso sottoposti a trattamento antiaggregante hanno presentato valori di Hb inferiori a quelli non trattati (p < 0,05). La percentuale di emotrasfusioneè risultata maggiore nei pazienti sottoposti a trattamento antiaggregante (AT) a prescindere dal tipo di interveno chirurgico rispetto al secondo gruppo con significatività statistica. Tra i pazienti normopeso si è registrata una diversa incidenza di trasfusione di sangue nei pazienti trattati con AT (50%) e quelli non trattati (29%) con un significato statistico (p <0,05), mentre i pazienti in sovrappeso non hanno presenato questa significativa differenza. È stata analizzata l’incidenza di complicanze post-operatorie in pazienti di peso normale e pazienti in sovrappeso e abbiamo rilevato l’incidenza di complicanze ,sia minori che maggiori, è stata più alta nei pazienti sottoposti terapia antiaggregante rispetto al secondo grippo indipendentemente dal peso. In conclusione, la terapia antiaggregante in pazienti sottoposti ad interventi chirurgici invasivi cambia l’incidenza di alcuni fattori di rischio, cone il sanguinamento e le complicanze post-operatorie.Questo risultato sottolinea l’importanza di una corretta manipolazione e preparazione nei pazienti trattai con agenti antitreombotici che devono subire un intervento chirurgico invasivo.
Angelillo-Scherrer, Anne; Burnier, Laurent; Flores, Nathalie; Savi, Pierre; DeMol, Maria; Schaeffer, Paul; Herbert, Jean-Marc; Lemke, Greg; Goff, Stephen P.; Matsushima, Glenn K.; Earp, H. Shelton; Vesin, Christian; Hoylaerts, Marc F.; Plaisance, Stéphane; Collen, Désiré; Conway, Edward M.; Wehrle-Haller, Bernhard; Carmeliet, Peter
Mechanisms regulating thrombus stabilization remain largely unknown. Here, we report that loss of any 1 of the Gas6 receptors (Gas6-Rs), i.e., Tyro3, Axl, or Mer, or delivery of a soluble extracellular domain of Axl that traps Gas6 protects mice against life-threatening thrombosis. Loss of a Gas6-R does not prevent initial platelet aggregation but impairs subsequent stabilization of platelet aggregates, at least in part by reducing “outside-in” signaling and platelet granule secretion. Gas6, through its receptors, activates PI3K and Akt and stimulates tyrosine phosphorylation of the β3 integrin, thereby amplifying outside-in signaling via αIIbβ3. Blocking the Gas6-R–αIIbβ3 integrin cross-talk might be a novel approach to the reduction of thrombosis. PMID:15650770
Fuseya, Yasuhiro; Kawamura, Miyuki; Matsuda, Eri; Takada, Kozue; Watanabe, Kiwamu; Fujitake, Junko; Nakaya, Yoshifumi
We herein report a case of capsular warning syndrome (CWS) that was successfully treated with recombinant tissue plasminogen activator (rt-PA). A 70-year-old woman had repeated stereotyped transient ischemic attacks (TIAs) of right hemiparesis and dysarthria. After hospitalization, argatroban, aspirin, and cilostazol were started but were ineffective. Thirteen hours after the first episode of TIAs, severe symptoms occurred. Magnetic resonance imaging showed acute infarctions in the internal capsule to corona radiata, so we used rt-PA. Since then, the TIAs have not occurred, and the symptoms have considerably improved. This case suggests that rt-PA might be effective and safe for use in treating CWS. PMID:28202868
Amann, Birgit H.
Abstract Objective: This article examines the characteristics of impulsive aggression (IA) as a comorbidity in children and adolescents with attention-deficit/hyperactivity disorder (ADHD), focusing on its incidence, impact on ADHD outcomes, need for timely intervention, and limitations of current treatment practices. Methods: Relevant literature was retrieved with electronic searches in PubMed and PsycINFO using the search strategy of “ADHD OR attention deficit hyperactivity disorder” AND “impulsive aggression OR reactive aggression OR hostile aggression OR overt aggression” AND “pediatric OR childhood OR children OR pre-adolescent OR adolescent” with separate searches using review OR clinical trial as search limits. Key articles published before the 2007 Expert Consensus Report on IA were identified using citation analysis. Results: More than 50% of preadolescents with ADHD combined subtype reportedly display clinically significant aggression, with impulsive aggression being the predominant subtype. Impulsive aggression is strongly predictive of a highly unfavorable developmental trajectory characterized by the potential for persistent ADHD, increasing psychosocial burden, accumulating comorbidities, serious lifelong functional deficits across a broad range of domains, delinquency/criminality, and adult antisocial behavior. Impulsive aggression, which triggers peer rejection and a vicious cycle of escalating dysfunction, may be a key factor in unfavorable psychosocial outcomes attributed to ADHD. Because severe aggressive behavior does not remit in many children when treated with primary ADHD therapy (i.e., stimulants and behavioral therapy), a common practice is to add medication of a different class to specifically target aggressive behavior. Conclusions: Impulsive aggression in children and adolescents with ADHD is a serious clinical and public health problem. Although adjunctive therapy with an aggression-targeted agent is widely recommended when
Nazareth, Rômulo A.; Tomaz, Luana S.; Ortiz-Costa, Susana; Atella, Geórgia C.; Ribeiro, José M. C.; Francischetti, Ivo M. B.; Monteiro, Robson Q.
Summary Ixolaris is a two-Kunitz tick salivary gland protein identified in Ixodes scapularis that presents extensive sequence homology to TFPI. It binds to FXa or FX as scaffolds and inhibits extrinsic Xnase. Differently from TFPI, however, Ixolaris does not bind to the active site cleft of FXa. Instead, complex formation is mediated by the FXa heparin-binding exosite, which may also results in decreased FXa activity into the prothrombinase complex. In this report, we show that recombinant 125I-Ixolaris interacts with rat and human FX in plasma and prolongs the prothrombin time (PT) and activated partial thromboplastin time (aPTT) in vitro. We have also investigated the effects of Ixolaris in vivo, using a venous thrombosis model. Subcutaneous (s.c.) or intravenous (i.v.) administration of Ixolaris in rats causes a dose-dependent reduction in thrombus formation, with complete inhibition attained at 20 μg/kg and 10 μg/kg, respectively. Remarkably, antithrombotic effects were observed 3 h after s.c. administration of Ixolaris and lasted for 24 h thereafter. Ex vivo experiments also showed that Ixolaris (up to 100 μg/kg) did not affect the aPTT, while the PT was increased by ~0.4-fold at the highest Ixolaris concentration. Remarkably, effective antithrombotic doses of Ixolaris (20 μg/Kg) was not associated with bleeding which was significant only at higher doses of the anticoagulant (40 μg/Kg). Our experiments demonstrate that Ixolaris is an effective and possibly safe antithrombotic agent in vivo. PMID:16807644
Zavyalova, Elena; Samoylenkova, Nadezhda; Revishchin, Alexander; Golovin, Andrey; Pavlova, Galina; Kopylov, Alexey
Aptamers are nucleic acid based molecular recognition elements with a high potential for the theranostics. Some of the aptamers are under development for therapeutic applications as promising antithrombotic agents; and G-quadruplex DNA aptamers, which directly inhibit the thrombin activity, are among them. RA-36, the 31-meric DNA aptamer, consists of two thrombin binding pharmacophores joined with the thymine linker. It has been shown earlier that RA-36 directly inhibits thrombin in the reaction of fibrinogen hydrolysis, and also it inhibits plasma and blood coagulation. Studies of both inhibitory and anticoagulation effects had indicated rather high species specificity of the aptamer. Further R&D of RA-36 requires exploring its efficiency in vivo. Therefore the development of a robust and adequate animal model for effective physiological studies of aptamers is in high current demand. This work is devoted to in vivo study of the antithrombotic effect of RA-36 aptamer. A murine model of thrombosis has been applied to reveal a lag and even prevention of thrombus formation when RA-36 was intravenous bolus injected in high doses of 1.4-7.1 µmol/kg (14-70 mg/kg). A comparative study of RA-36 aptamer and bivalirudin reveals that both direct thrombin inhibitors have similar antithrombotic effects for the murine model of thrombosis; though in vitro bivalirudin has anticoagulation activity several times higher compared to RA-36. The results indicate that both RA-36 aptamer and bivalirudin are direct thrombin inhibitors of different potency, but possible interactions of the thrombin-inhibitor complex with other components of blood coagulation cascade level the physiological effects for both inhibitors.
Zavyalova, Elena; Samoylenkova, Nadezhda; Revishchin, Alexander; Golovin, Andrey; Pavlova, Galina; Kopylov, Alexey
Aptamers are nucleic acid based molecular recognition elements with a high potential for the theranostics. Some of the aptamers are under development for therapeutic applications as promising antithrombotic agents; and G-quadruplex DNA aptamers, which directly inhibit the thrombin activity, are among them. RA-36, the 31-meric DNA aptamer, consists of two thrombin binding pharmacophores joined with the thymine linker. It has been shown earlier that RA-36 directly inhibits thrombin in the reaction of fibrinogen hydrolysis, and also it inhibits plasma and blood coagulation. Studies of both inhibitory and anticoagulation effects had indicated rather high species specificity of the aptamer. Further R&D of RA-36 requires exploring its efficiency in vivo. Therefore the development of a robust and adequate animal model for effective physiological studies of aptamers is in high current demand. This work is devoted to in vivo study of the antithrombotic effect of RA-36 aptamer. A murine model of thrombosis has been applied to reveal a lag and even prevention of thrombus formation when RA-36 was intravenous bolus injected in high doses of 1.4–7.1 µmol/kg (14–70 mg/kg). A comparative study of RA-36 aptamer and bivalirudin reveals that both direct thrombin inhibitors have similar antithrombotic effects for the murine model of thrombosis; though in vitro bivalirudin has anticoagulation activity several times higher compared to RA-36. The results indicate that both RA-36 aptamer and bivalirudin are direct thrombin inhibitors of different potency, but possible interactions of the thrombin-inhibitor complex with other components of blood coagulation cascade level the physiological effects for both inhibitors. PMID:25192011
Fraga-Silva, Rodrigo Araújo; Pinheiro, Sergio Veloso Brant; Gonçalves, Andrey Christian Costa; Alenina, Nathalia; Bader, Michael; Santos, Robson Augusto Souza
The antithrombotic effect of angiotensin(Ang)-(1–7) has been reported, but the mechanism of this effect is not known. We investigated the participation of platelets and receptor Mas-related mechanisms in this action. We used Western blotting to test for the presence of Mas protein in rat platelets and used fluorescent-labeled FAM-Ang-(1–7) to determine the specific binding for Ang-(1–7) and its displacement by the receptor Mas antagonist A-779 in rat platelets and in Mas−/ − and Mas+/+ mice platelets. To test whether Ang-(1–7) induces NO release from platelets, we used the NO indicator DAF-FM. In addition we examined the role of Mas in the Ang-(1–7) antithrombotic effect on induced thrombi in the vena cava of male Mas−/ − and Mas+/+ mice. The functional relevance of Mas in hemostasis was evaluated by determining bleeding time in Mas+/+ and Mas−/ − mice. We observed the presence of Mas protein in platelets, as indicated by Western Blot, and displacement of the binding of fluorescent Ang-(1–7) to rat platelets by A-779. Furthermore, in Mas+/+ mouse platelets we found specific binding for Ang-(1–7), which was absent in Mas−/ − mouse platelets. Ang-(1–7) released NO from rat and Mas+/+ mouse platelets, and A-779 blocked this effect. The NO release stimulated by Ang-(1–7) was abolished in Mas−/ − mouse platelets. Ang-(1–7) inhibited thrombus formation in Mas+/+ mice. Strikingly, this effect was abolished in Mas−/ −mice. Moreover, Mas deficiency resulted in a significant decrease in bleeding time (8.50 ± 1.47 vs. 4.28 ± 0.66 min). This study is the first to show the presence of Mas protein and specific binding for Ang-(1–7) in rat and mouse platelets. Our data also suggest that the Ang-(1–7) antithrombotic effect involves Mas-mediated NO release from platelets. More importantly, we showed that the antithrombotic effect of Ang-(1–7) in vivo is Mas dependent and that Mas is functionally important in hemostasis. PMID
Han, Na; Gu, Yuhong; Ye, Chun; Cao, Yan; Liu, Zhihui; Yin, Jun
The 70% ethanol fraction from an aqueous extract of raspberry leaves was shown to be the most antithrombotic fraction in in vitro and in vivo tests. The total flavonoids and phenolics in this fraction were 0.286g/g and 0.518g/g by colorimetry. Six compounds, including salicylic acid, kaempferol, quercetin, tiliroside, quercetin 3-O-β-d-glucopyranoside and kaempferol 3-O-β-d-glucopyranoside, were isolated from the active fraction. Among them, kaempferol, quercetin and tiliroside obviously delayed plasma recalcification time (PRT) in blood.
Serotonin (5-HT) regulates aggressive behavior in animals. This study examined if 5-HT regulation of aggressiveness is gene-dependent. Chickens from two divergently selected lines KGB and MBB (Kind Gentle Birds and Mean Bad Birds displaying low and high aggressiveness, respectively) and DXL (Dekalb ...
Lee, Myeong Soo; Lee, Jung-Sook
We investigated the effects of group music intervention on aggression and self-esteem in children with highly aggressive behavior. Forty-eight children were allocated to either a music intervention group or an untreated control group. The music intervention group received 50 min of music intervention twice weekly for 15 consecutive weeks. The outcome measures were Child Behavior Checklist Aggression Problems Scale (Parents), Child Aggression Assessment Inventory (Teachers) and Rosenberg Self-esteem Scale. After 15 weeks, the music intervention group showed significant reduction of aggression and improvement of self-esteem compared with the control group. All outcome measures were significantly lower in the music intervention group than prior to treatment, while there was no change in the control group. These findings suggest that music can reduce aggressive behavior and improve self-esteem in children with highly aggressive behavior. Music intervention is an easily accessible therapy for children and as such may be an effective intervention for aggressive behavior. Further more, objective and replicable measures are required from a randomized controlled trial with a larger sample size and active comparable control. PMID:18955314
Tang, Catherine So-Kum; And Others
Compared sexual and aggressive motives for sexual aggression in Chinese college students. Male undergraduates (N=146) completed self-report measures. Results suggest that sex guilt and aggressive guilt acted as inhibitors for their respective drives and sexual aggression resulted from aggressive, rather than sexual, motives. Sexual aggression may…
Zhang, Chao; Zhang, Lin; Zhang, Youcai; Sun, Na; Jiang, Shaoyi; Fujihara, Timothy J.; Sun, Yan
An antithrombotic nanoconjugate was designed in which a designed biomimetic peptide LWWNSYY was immobilized to the surface of poly(glycidyl methacrylate) nanoparticles (PGMA NPs). Our previous work has demonstrated LWWNSYY to be an effective inhibitor of integrin α2β1-collagen interaction and subsequent thrombus formation, however its practical application suffered from the formation of clusters in physiological environment caused by its high hydrophobicity. In our present study, the obtained LWWNSYY-PGMA nanoparticles (L-PGMA NPs) conjugate, with an improved dispersibility of LWWNSYY by PGMA NPs, have shown binding to collagen receptors with a Kd of 3.45 ± 1.06 μM. L-PGMA NPs have also proven capable of inhibiting platelet adhesion in vitro with a reduced IC50 of 1.83 ± 0.29 μg/mL. High inhibition efficiency of L-PGMA NPs in thrombus formation was further confirmed in vivo with a 50% reduction of thrombus weight. Therefore, L-PGMA NPs were developed as a high-efficiency antithrombotic nanomedicine targeted for collagen exposed on diseased blood vessel wall.
Perez, Michel; Lamothe, Marie; Maraval, Catherine; Mirabel, Etienne; Loubat, Chantal; Planty, Bruno; Horn, Clemens; Michaux, Julien; Marrot, Sebastien; Letienne, Robert; Pignier, Christophe; Bocquet, Arnaud; Nadal-Wollbold, Florence; Cussac, Didier; de Vries, Luc; Le Grand, Bruno
Protease activated receptors (PARs) or thrombin receptors constitute a class of G-protein-coupled receptors (GPCRs) implicated in the activation of many physiological mechanisms. Thus, thrombin activates many cell types such as vascular smooth muscle cells, leukocytes, endothelial cells, and platelets via activation of these receptors. In humans, thrombin-induced platelet aggregation is mediated by one subtype of these receptors, termed PAR1. This article describes the discovery of new antagonists of these receptors and more specifically two compounds: 2-[5-oxo-5-(4-pyridin-2-ylpiperazin-1-yl)penta-1,3-dienyl]benzonitrile 36 (F 16618) and 3-(2-chlorophenyl)-1-[4-(4-fluorobenzyl)piperazin-1-yl]propenone 39 (F 16357), obtained after optimization. Both compounds are able to inhibit SFLLR-induced human platelet aggregation and display antithrombotic activity in an arteriovenous shunt model in the rat after iv or oral administration. Furthermore, these compounds are devoid of bleeding side effects often observed with other types of antiplatelet drugs, which constitutes a promising advantage for this new class of antithrombotic agents.
Beretz, A; Cazenave, J P
Natural compounds have been the first historical source of antithrombotic compounds (heparin, vitamin K antagonists, streptokinase, urokinase); molecules extracted from plants or animals still provide some of the most original and promising approaches for the discovery of new drugs in this class. In this review, we will briefly describe three examples of current research trends that could lead to the development of new antithrombotic drugs of natural origin. Flavonoids have been shown to be inhibitors of cyclic nucleotide phosphodiesterase; this enzymatic activity is one of the main mechanisms of inhibition of aggregation of blood platelets by flavonoids. Some of these compounds could represent templates for the development of new inhibitors of platelet activation. Garlic ( ALLIUM SATIVUM) has been shown to inhibit platelet aggregation IN VIVO and IN VITRO; a number of active principles has now been identified and their mechanisms of action are currently being explored. An ancient remedy, the medicinal leech ( HIRUDO MEDICINALIS), has been found to contain several potent anticoagulant proteins. Among them, hirudin, a polypeptide of 65 amino acids, has been identified as one of the most potent inhibitors of thrombin. The production of sufficient amounts of hirudin through molecular biology techniques has now allowed the performance of clinical trials. These three examples show that careful consideration of biochemical, ethnopharmacological, or toxicological properties of natural products can still constitute a valuable basis for the development of new drugs.
Beretz, A; Cazenave, J P
Natural compounds have been the first historical source of antithrombotic compounds (heparin, vitamin K antagonists, streptokinase, urokinase); molecules extracted from plants or animals still provide some of the most original and promising approaches for the discovery of new drugs in this class. In this review, we will briefly describe three examples of current research trends that could lead to the development of new antithrombotic drugs of natural origin. Flavonoids have been shown to be inhibitors of cyclic nucleotide phosphodiesterase; this enzymatic activity is one of the main mechanisms of inhibition of aggregation of blood platelets by flavonoids. Some of these compounds could represent templates for the development of new inhibitors of platelet activation. Garlic (Allium sativum) has been shown to inhibit platelet aggregation in vivo and in vitro; a number of active principles has now been identified and their mechanisms of action are currently being explored. An ancient remedy, the medicinal leech (Hirudo medicinalis), has been found to contain several potent anticoagulant proteins. Among them, hirudin, a polypeptide of 65 amino acids, has been identified as one of the most potent inhibitors of thrombin. The production of sufficient amounts of hirudin through molecular biology techniques has now allowed the performance of clinical trials. These three examples show that careful consideration of biochemical, ethnopharmacological, or toxicological properties of natural products can still constitute a valuable basis for the development of new drugs.
Kim, Jun Ho; Lee, Jaemin; Kang, Soouk; Moon, Hongsik; Chung, Kyung Ho; Kim, Kyoung Rak
Lindera obtusiloba has been used in traditional herbal medicine for the treatment of blood stasis and inflammation. The leaves of Lindera obtusiloba have been reported to exhibit various physiological activities. However, there is little information available on their antiplatelet and antithrombotic activities. Thus, the present study aimed to evaluate the effect of Lindera obtusiloba leaf extract (LLE) on platelet activities, coagulation and thromboembolism. In a platelet aggregation study, LLE significantly inhibited various agonist-induced platelet aggregations in vitro and ex vivo. Furthermore, LLE significantly inhibited collagen-induced thromboxane A2 (TXA2) production in rat platelets. In addition, oral administration of LLE was protective in a mouse model of pulmonary thromboembolism induced by intravenous injection of a mixture of collagen and epinephrine. Interestingly, LLE did not significantly alter prothrombin time (PT) and activated partial thromboplastin time (aPTT). This study indicates that the antithrombotic effects of LLE might be due to its antiplatelet activities rather than anticoagulation. Taken together, these results suggest that LLE may be a candidate preventive and therapeutic agent in cardiovascular diseases associated with platelet hyperactivity. PMID:27302963
Choi, Jun-Hui; Kim, Dae-Won; Park, Se-Eun; Lee, Hyo-Jeong; Kim, Ki-Man; Kim, Kyung-Je; Kim, Myung-Kon; Kim, Sung-Jun; Kim, Seung
Dendropanax morbifera H. Lev. is well known in Korean traditional medicine for improvement of blood circulation. In this study, rutin, a bioflavonoid having anti-thrombotic and anticoagulant activities was isolated from a traditional medicinal plant, D. morbifera H. Lev. The chemical characteristics of rutin was studied to be quercetin 3-O-α-l-rhamnopyranosyl-(1-6)-β-d-glucopyranoside using high performance liquid chromatography mass spectrometry (HPLC-MS), proton nuclear magnetic resonance ((1)H NMR) and carbon-13 nuclear magnetic resonance ((13)C NMR). Turbidity and fibrin clotting studies revealed that rutin reduces fibrin clot in concentration dependent manner. Rutin was found to prolong activated partial thromboplastin time (aPTT), prothrombin time (PT) and closure time (CT). Furthermore, it decreased the activity of pro-coagulant protein, thrombin. In vivo study showed that rutin exerted a significant protective effect against collagen and epinephrine (or thrombin) induced acute thromboembolism in mice. These results suggest that rutin has a potent to be an anti-thrombotic agent for cardiovascular diseases.
Zhang, Chao; Zhang, Lin; Zhang, Youcai; Sun, Na; Jiang, Shaoyi; Fujihara, Timothy J.; Sun, Yan
An antithrombotic nanoconjugate was designed in which a designed biomimetic peptide LWWNSYY was immobilized to the surface of poly(glycidyl methacrylate) nanoparticles (PGMA NPs). Our previous work has demonstrated LWWNSYY to be an effective inhibitor of integrin α2β1-collagen interaction and subsequent thrombus formation, however its practical application suffered from the formation of clusters in physiological environment caused by its high hydrophobicity. In our present study, the obtained LWWNSYY-PGMA nanoparticles (L-PGMA NPs) conjugate, with an improved dispersibility of LWWNSYY by PGMA NPs, have shown binding to collagen receptors with a Kd of 3.45 ± 1.06 μM. L-PGMA NPs have also proven capable of inhibiting platelet adhesion in vitro with a reduced IC50 of 1.83 ± 0.29 μg/mL. High inhibition efficiency of L-PGMA NPs in thrombus formation was further confirmed in vivo with a 50% reduction of thrombus weight. Therefore, L-PGMA NPs were developed as a high-efficiency antithrombotic nanomedicine targeted for collagen exposed on diseased blood vessel wall. PMID:27195826
... insulin therapy can help you achieve desired blood sugar control and what intensive insulin therapy requires of ... aggressive treatment approach designed to control your blood sugar levels. Intensive insulin therapy requires close monitoring of ...
Fuentes, Eduardo; Alarcón, Marcelo; Fuentes, Manuel; Carrasco, Gilda; Palomo, Iván
Background: Epidemiological studies have shown the prevention of cardiovascular diseases through the regular consumption of vegetables. Eruca sativa Mill., commonly known as rocket, is a leafy vegetable that has anti-inflammatory activity. However, its antiplatelet and antithrombotic activities have not been described. Methods: Eruca sativa Mill. aqueous extract (0.1 to 1 mg/mL), was evaluated on human platelets: (i) P-selectin expression by flow cytometry; (ii) platelet aggregation induced by ADP, collagen and arachidonic acid; (iii) IL-1β, TGF-β1, CCL5 and thromboxane B2 release; and (iv) activation of NF-κB and PKA by western blot. Furthermore, (v) antithrombotic activity (200 mg/kg) and (vi) bleeding time in murine models were evaluated. Results: Eruca sativa Mill. aqueous extract (0.1 to 1 mg/mL) inhibited P-selectin expression and platelet aggregation induced by ADP. The release of platelet inflammatory mediators (IL-1β, TGF-β1, CCL5 and thromboxane B2) induced by ADP was inhibited by Eruca sativa Mill. aqueous extract. Furthermore, Eruca sativa Mill. aqueous extract inhibited NF-κB activation. Finally, in murine models, Eruca sativa Mill. aqueous extract showed significant antithrombotic activity and a slight effect on bleeding time. Conclusion: Eruca sativa Mill. presents antiplatelet and antithrombotic activity. PMID:25514563
Beck, Niels C; Hammer, Joseph H; Robbins, Sharon; Tubbesing, Tara; Menditto, Anthony; Pardee, Alicia
In this study, we compared three groups of women admitted to a public forensic inpatient facility over the course of a two-year period. Detailed and systematic examination of social and psychiatric histories revealed that the group with the most persistent levels of aggression differed from the other two groups with respect to frequency of self-harming behavior, intellectual impairment, hypothyroidism, a childhood diagnosis of attention deficit-hyperactivity disorder (ADHD), and age of onset of psychiatric and behavioral symptoms. The high-aggression group also had the highest rate of childhood physical and sexual abuse, but the difference between that group and the two lower aggression groups did not achieve statistical significance. From the standpoint of childhood adversity, 94 percent of those in the high-aggression group had been placed outside of the original home by age 11. Eighty-nine percent were intellectually impaired. At admission, physical examinations revealed that 50 percent had a history of hypothyroidism and two-thirds were obese. Before admission, most had manifested severe aggression and emotional dysregulation, as evinced by high levels of self-harm, suicide attempts, and aggressive behavior in previous institutional settings that was both frequent and intense. Patients who share these characteristics are currently placed on a ward at the hospital with a milieu and individual therapy programs that are based on a dialectical behavior therapy approach that targets key symptoms of emotional and behavioral dysregulation.
Pereira, Pedro; Melo Abreu, Elisa; Cunha, Teresa Margarida; Rolim, Inês
A 45-year-old woman with a history of total hysterectomy with adnexal preservation for uterine leiomyomas presented to our hospital with a right gluteal palpable mass, which she first noticed 6 months before and had progressively enlarged since then.Radiological studies revealed a 14 cm lesion with translevator growth that displaced rather than invaded adjacent structures, with a peculiar whorled pattern on T2-weighted MRI, which enhanced following gadolinium administration. CT-guided biopsy was performed, and in conjunction with imaging features the diagnosis of an aggressive angiomyxoma was assumed and confirmed following surgical excision.
Human aggression is viewed from four explanatory perspectives, derived from the ethological tradition. The first consists of its adaptive value, which can be seen throughout the animal kingdom, involving resource competition and protection of the self and offspring, which has been viewed from a cost-benefit perspective. The second concerns the phylogenetic origin of aggression, which in humans involves brain mechanisms that are associated with anger and inhibition, the emotional expression of anger, and how aggressive actions are manifest. The third concerns the origin of aggression in development and its subsequent modification through experience. An evolutionary approach to development yields conclusions that are contrary to the influential social learning perspective, notably that physical aggression occurs early in life, and its subsequent development is characterized by learned inhibition. The fourth explanation concerns the motivational mechanisms controlling aggression: approached from an evolutionary background, these mechanisms range from the inflexible reflex-like responses to those incorporating rational decision-making.
Dickson, Daniel J; Richmond, Ashley D; Brendgen, Mara; Vitaro, Frank; Laursen, Brett; Dionne, Ginette; Boivin, Michel
The present study examined sibling influence over reactive and proactive aggression in a sample of 452 same-sex twins (113 male dyads, 113 female dyads). Between and within siblings influence processes were examined as a function of relative levels of parental coercion and hostility to test the hypothesis that aggression contagion between twins occurs only among dyads who experience parental coerciveness. Teacher reports of reactive and proactive aggression were collected for each twin in kindergarten (M = 6.04 years; SD = 0.27) and in first grade (M = 7.08 years; SD = 0.27). Families were divided into relatively low, average, and relatively high parental coercion-hostility groups on the basis of maternal reports collected when the children were 5 years old. In families with relatively high levels of parental coercion-hostility, there was evidence of between-sibling influence, such that one twin's reactive aggression at age 6 predicted increases in the other twin's reactive aggression from ages 6 to 7, and one twin's proactive aggression at age 6 predicted increases in the other twin's proactive aggression from ages 6 to 7. There was also evidence of within-sibling influence such that a child's level of reactive aggression at age 6 predicted increases in the same child's proactive aggression at age 7, regardless of parental coercion-hostility. The findings provide new information about the etiology of reactive and proactive aggression and individual differences in their developmental interplay.
Harris, M B
For 416 college students, questioned about their experiences with aggression and television viewing, only very weak correlations between preference for violent shows and aggression were observed. Black males watched significantly more television than other respondents. These findings suggest that the frequently reported correlation between viewing televised violence and aggression may not appear when sex, ethnicity, and education are controlled in a sample of young adults.
Kramkowski, K; Leszczynska, A; Przyborowski, K; Kaminski, T; Rykaczewska, U; Sitek, B; Zakrzewska, A; Proniewski, B; Smolenski, R T; Chabielska, E; Buczko, W; Chlopicki, S
The mechanisms underlying nitrite-induced effects on thrombosis and hemostasis in vivo are not clear. The goal of the work described here was to investigate the role of xanthine oxidoreductase (XOR) in the anti-platelet and anti-thrombotic activities of nitrite in rats in vivo. Arterial thrombosis was induced electrically in rats with renovascular hypertension by partial ligation of the left renal artery. Sodium nitrite (NaNO2, 0.17 mmol/kg twice daily for 3 days, p.o) was administered with or without one of the XOR-inhibitors: allopurinol (ALLO) and febuxostat (FEB) (100 and 5 mg/kg, p.o., for 3 days). Nitrite treatment (0.17 mmol/kg), which was associated with a significant increase in NOHb, nitrite/nitrate plasma concentration, resulted in a substantial decrease in thrombus weight (TW) (0.48 ± 0.03 mg vs. vehicle [VEH] 0.88 ± 0.08 mg, p < 0.001) without a significant hypotensive effect. The anti-thrombotic effect of nitrite was partially reversed by FEB (TW = 0.63 ± 0.06 mg, p < 0.05 vs. nitrites), but not by ALLO (TW = 0.43 ± 0.02 mg). In turn, profound anti-platelet effect of nitrite measured ex vivo using collagen-induced whole-blood platelet aggregation (70.5 ± 7.1% vs. VEH 100 ± 4.5%, p < 0.05) and dynamic thromboxaneB2 generation was fully reversed by both XOR-inhibitors. In addition, nitrite decreased plasminogen activator inhibitor-1 concentration (0.47 ± 0.13 ng/ml vs. VEH 0.62 ± 0.04 ng/ml, p < 0.05) and FEB/ALLO reversed this effect. In vitro the anti-platelet effect of nitrite (1 mM) was reversed by FEB (0.1 mM) under hypoxia (0.5%O2) and normoxia (20%O2). Nitrite treatment had no effect on coagulation parameters. In conclusion, the nitrite-induced anti-platelet effect in rats in vivo is mediated by XOR, but XOR does not fully account for the anti-thrombotic effects of nitrite.
Song, Shao-Jiang; Li, Ling-Zhi; Gao, Pin-Yi; Yuan, Yan-Qiang; Wang, Ru-Ping; Liu, Ke-Chun; Peng, Ying
Four novel phenolic compounds (1-4) were isolated from the leaves of Crataegus pinnatifida, along with three known ones (5-7). Their structures were elucidated as: methyl 4-O-β-D-glucopyranosyl-3-[(2E,6E)-8-O-β-D-glucopyranosyl-3,7-dimethyl-2,6-octadienyl] benzoate (1), biphenyl-5-ol-3-O-β-D-glucoside (2), 3,4'-dimethoxy-biphenyl-5-ol-4-O-β-D-glucoside (3), (E)-6-(benzoyloxy)-1-hydroxyhex-3-en-2-O-β-D-glucoside (4), shanyenoside A (5), eriodectyol (6), and 2″-O-rhamnosyl vitexin (7), using a combination of mass spectroscopy, 1D and 2D NMR spectroscopy, and chemical analysis. The antithrombotic activity of the isolated compounds was investigated on the transgenic zebra fish system. Among them, eriodectyol (6) potently inhibited the production of thrombus.
Kontogiorgis, Christos; Nicolotti, Orazio; Mangiatordi, Giuseppe Felice; Tognolini, Massimiliano; Karalaki, Foteini; Giorgio, Carmine; Patsilinakos, Alexandros; Carotti, Angelo; Hadjipavlou-Litina, Dimitra; Barocelli, Elisabetta
The interest towards coumarin-based structures stems from their polypharmacological profile. Herein, we present a series of Mannich bases and 7-azomethine-linked coumarin derivatives exhibiting antiplatelet and antithrombotic activities, in addition to the already known anti-inflammatory and antioxidant activities. Among others, compounds 15 and 16 were found to be the most potent and selective inhibitors of platelet aggregation whereas compound 3 also proved to be the most potent in the clot retraction assay. Structure-activity relationship studies were conducted to elucidate the molecular determinants responsible for the herein observed activities. The chance of inhibiting cyclooxygenase-1 was also investigated for evaluating the platelet aggregation induced by arachidonic acid. Taken together, these results suggest that the investigation of other targets connected to the antiplatelet activity, such as phosphodiesterase-3 (PDE3), could be a viable strategy to shed light on the polypharmacological profile of coumarin-based compounds. Docking simulations towards PDE3 were also carried out.
Becker, Daniel E
Appropriate preoperative assessment of the dental patient should always include an analysis of the patient's medications. Cardiovascular diseases are the most common group of medical disorders that dentists encounter, and the number of drugs prescribed for managing these conditions is staggering. This justifiably raises concern and probable confusion regarding side effects and possible drug interactions with medications the dentist may deem necessary for dental care. This continuing education article is the second in a series that will address essential pharmacology of medications commonly prescribed for chronic medical care. A reasonable understanding of these agents will allow the dentist to better appreciate the medical status of their patients, to appreciate the actual risks associated with antithrombotic medications, and to avoid adverse interactions with drugs the dentist might administer or prescribe. PMID:18547153
Becker, Daniel E
Appropriate preoperative assessment of the dental patient should always include an analysis of the patient's medications. Cardiovascular diseases are the most common group of medical disorders that dentists encounter, and the number of drugs prescribed for managing these conditions is staggering. This justifiably raises concern and probable confusion regarding side effects and possible drug interactions with medications the dentist may deem necessary for dental care. This continuing education article is the second in a series that will address essential pharmacology of medications commonly prescribed for chronic medical care. A reasonable understanding of these agents will allow the dentist to better appreciate the medical status of their patients, to appreciate the actual risks associated with antithrombotic medications, and to avoid adverse interactions with drugs the dentist might administer or prescribe.
Chen, Yicong; Zhao, Yuhui; Dang, Ge; Ouyang, Fubing; Chen, Xinran; Zeng, Jinsheng
Abstract The risks of stroke or systemic embolism and major bleeding are considered similar between paroxysmal and sustained atrial fibrillation (AF), and warfarin has demonstrated superior efficacy to aspirin, irrespective of the AF type. However, with the advent of novel oral anticoagulants (NOACs) and antiplatelet agents, the optimal antithrombotic prophylaxis for paroxysmal AF remains unclear. We searched Medline, Embase, CENTRAL, and China Biology Medicine up to October week 1, 2015. Randomized controlled trials of AF patients assigned to NOACs, warfarin, or antiplatelets, with reports of outcomes stratified by the AF type, were included. A fixed-effects model was used if no statistically significant heterogeneity was indicated; otherwise, a random-effects model was used. Six studies of 69,990 nonvalvular AF patients with ≥1 risk factor for stroke were included. Postantithrombotic treatment, paroxysmal AF patients showed lower risks of stroke (risk ratio [RR], 0.72; 95% confidence interval [CI], 0.59–0.87), stroke or systemic embolism (RR, 0.74; 95% CI, 0.63–0.86), and all-cause mortality (RR, 0.75; 95% CI, 0.67–0.83), while the major bleeding risk was comparable (RR, 0.96; 95% CI, 0.85–1.08). We were unable to detect the superiority of anticoagulation over antiplatelets for paroxysmal AF (RR, 0.72; 95% CI, 0.43–1.23), while it was more effective than antiplatelets for sustained AF (RR, 0.42; 95% CI, 0.33–0.54). NOACs showed superior efficacy over warfarin and trended to show reduced major bleeding irrespective of the AF type. The AF type is a predictor for thromboembolism, and might be helpful in stroke risk stratification model in combination with other risk factors. With the appearance of novel anticoagulant and antiplatelet agents, the best antithrombotic choice for paroxysmal AF needs further exploration. PMID:26717376
Discusses what may be considered aggressive behavior, what motivates aggressive students, and possible teacher responses to aggressive behavior. Describes four points on which teachers can focus to diminish the attractiveness of aggression and ensure that it is not rewarded. Identifies learning activities which provide aggressive students with the…
Stacy, Lauri L.
This document reviews existing empirical research on the effect of pornography on aggressive behavior. Two types of pornography are distinguished: aggressive pornography and non-aggressive pornography. Conclusions drawn from the research review are presented, including: (1) aggressive pornograpy consistently increases aggressive attitudes and…
Russell, Gordon W.; Dua, Manjula
Used league records of all Canadian hockey games (N=426) played during a season to test a lunar-aggression hypothesis. Despite the use of multiple measures of lunar phase and interpersonal aggression, support for lunar influence was not forthcoming. Supplemental data revealed that beliefs in lunar influence are fairly common. (JAC)
Persons who have suffered traumatic injury to the brain may subsequently display aggressive behavior. Three main syndromes of aggression following traumatic brain injury are described: (1) episodic dyscontrol; (2) frontal lobe disinhibition; and (3) exacerbation of premorbid antisociality. The neuropsychological substrates of these syndromes are…
Blair, Robert J R
This selective review provides a model of the neurobiology of impulsive aggression from a cognitive neuroscience perspective. It is argued that prototypical cases of impulsive aggression, those associated with anger, involve the recruitment of the acute threat response system structures; that is, the amygdala, hypothalamus, and periaqueductal gray. It is argued that whether the recruitment of these structures results in impulsive aggression or not reflects the functional roles of ventromedial frontal cortex and dorsomedial frontal and anterior insula cortex in response selection. It is also argued that impulsive aggression may occur because of impaired decision making. The aggression may not be accompanied by anger, but it will reflect disrupted evaluation of the rewards/benefits of the action.
Abstract This selective review provides a model of the neurobiology of impulsive aggression from a cognitive neuroscience perspective. It is argued that prototypical cases of impulsive aggression, those associated with anger, involve the recruitment of the acute threat response system structures; that is, the amygdala, hypothalamus, and periaqueductal gray. It is argued that whether the recruitment of these structures results in impulsive aggression or not reflects the functional roles of ventromedial frontal cortex and dorsomedial frontal and anterior insula cortex in response selection. It is also argued that impulsive aggression may occur because of impaired decision making. The aggression may not be accompanied by anger, but it will reflect disrupted evaluation of the rewards/benefits of the action. PMID:26465707
Laney, Cara; Takarangi, Melanie K T
Can people develop false memories for committing aggressive acts? How does this process compare to developing false memories for victimhood? In the current research we used a simple false feedback procedure to implant false memories for committing aggressive acts (causing a black eye or spreading malicious gossip) or for victimhood (receiving a black eye). We then compared these false memories to other subjects' true memories for equivalent events. False aggressive memories were all too easy to implant, particularly in the minds of individuals with a proclivity towards aggression. Once implanted, the false memories were indistinguishable from true memories for the same events, on several dimensions, including emotional content. Implications for aggression-related memory more generally as well as false confessions are discussed.
Levinson, Cheri A; Giancola, Peter R; Parrott, Dominic J
The goal of this investigation was to determine whether permissive beliefs about aggression moderate the relation between acute alcohol intoxication and aggression in two large experiments. Participants in Study 1 were 328 (163 men and 165 women) social drinkers and those in Study 2 were 518 (252 men and 266 women) social drinkers. Beliefs about aggression were assessed using a well-validated self-report measure. Following the consumption of either an alcohol or a placebo beverage, participants were tested on a laboratory task in which electric shocks were received from, and administered to, a fictitious opponent under the guise of a competitive reaction-time task. Aggression was operationalized as the combined mean responses for shock intensity and duration across all trials. Our central finding was that alcohol increased aggression in persons with more approving beliefs about aggression than in those who did not hold such beliefs. Our results are discussed within the context of Huesmann's (1988) cognitive script model of aggression. Suggestions for violence prevention efforts are put forth as well.
Examines the effects of aggressive-erotic stimuli on male aggression toward females. Male subjects' deliveries of electric shocks to males or females after viewing either a neutral, erotic, or aggressive-erotic film were measured. (Author/SS)
Reisner, Ilana R
Canine aggression directed to human beings is a common presenting complaint and requires attention to safety issues and behavior modification to minimize the risks of future aggression. Dogs may bite familiar people, including family members, or unfamiliar people for a variety of reasons. Anxiety plays an important role in aggression regardless of its target or circumstances. Effective management of aggression may include education and safety counseling for owners, lifestyle changes for dogs and owners, avoidance of provocations when possible, and behavior modification to minimize the risk of future bites. Drug therapy may be indicated to facilitate behavior modification or to reduce reactivity in the dog.
Yukawa, S; Yoshida, F
This study investigated whether cognitions and emotions elicited by media violence mediate aggressive behavior. Eighty undergraduates, 40 men and 40 women, participated in the experiment. First, subjects were exposed to one of four violent videos which varied in levels of violence and entertainment. Subjects' heart rate and eyeblink rate were continuously recorded while they watched the video. After watching it, subjects described their thoughts which occurred while watching it and rated their affective reactions to it. Finally, their aggressive behavior was measured. Results showed that (1) videos high in violence elicited more aggressive thoughts, more thoughts of negative affect, stronger negative affects, and stronger empty-powerless affects, whereas videos high in entertainment elicited stronger positive affects; (2) no significant differences were found among the videos in terms of physiological reactions and aggressive behavior; and (3) cognitions and emotions elicited by media violence did not mediate aggressive behavior.
Dickson, Daniel J.; Richmond, Ashley; Brendgen, Mara; Vitaro, Frank; Laursen, Brett; Dionne, Ginette; Boivin, Michel
The present study examined sibling influence over reactive and proactive aggression in a sample of 452 same-sex twins (113 male dyads, 113 female dyads). Between and within siblings influence processes were examined as a function of relative levels of parental coercion and hostility to test the hypothesis that aggression contagion between twins occurs only among dyads who experience parental coerciveness. Teacher reports of reactive and proactive aggression were collected for each twin in kindergarten (M = 6.04 years; SD = 0.27) and in first grade (M = 7.08 years; SD = 0.27). Families were divided into relatively low, average, and relatively high parental coercion-hostility groups on the basis of maternal reports collected when the children were 5 years old. In families with relatively high levels of parental coercion-hostility, there was evidence of between-sibling influence, such that one twin’s reactive aggression at age 6 predicted increases in the other twin’s reactive aggression from ages 6 to 7, and one twin’s proactive aggression at age 6 predicted increases in the other twin’s proactive aggression from ages 6 to 7. There was also evidence of within-sibling influence such that a child’s level of reactive aggression at age 6 predicted increases in the same child’s proactive aggression at age 7, regardless of parental coercion-hostility. The findings provide new information about the etiology of reactive and proactive aggression and individual differences in their developmental interplay. PMID:25683448
Zaidi, Hasan A; Cote, David J; Dunn, Ian F; Laws, Edward R
Despite formal pathological criteria, not all atypical pituitary adenomas display clinically aggressive behavior. We set out to determine which factors predict a clinically aggressive phenotype among a cohort of atypical pituitary adenomas. Medical records were retrospectively reviewed from April 2008 to July 2015. Of 569 pituitary adenomas, 47 (8.3%) patients were surgically treated for atypical adenomas as defined by the WHO criteria. Clinically aggressive adenomas were defined as occurring in those patients who necessitated additional therapeutic intervention after the index (first) surgery, including additional surgery, medical therapy, or radiosurgery. Forty-seven patients with histopathological and immunohistochemical confirmation of atypical adenomas were identified and of these, 23 were noted to have a clinically aggressive course. Among the remaining 24 patients, the disease remained quiescent after the index surgery. On univariate analysis, clinically aggressive lesions were more likely to have a larger axial diameter on MRI (2.9±1.9cm vs. 1.9±0.7cm, p=0.02), greater incidence of cavernous sinus invasion (65.2% vs. 20.8%, p<0.01), and greater incidence of clival extension (60.9% vs. 0, p<0.01) on preoperative imaging. The two groups were equivalent with regard to immunohistochemical staining for ACTH, HGH, LH, FSH, PRL, and TSH. Clinically aggressive lesions, however, trended towards a greater average MIB-1 proliferative index (7.5%±4.9 vs. 6.0%±3.6, p=0.03). On multivariate analysis, the MIB-1 proliferative index trended towards statistical significance (p=0.06) as an independent predictor of clinical aggressiveness. Atypical pituitary adenomas are defined by a rigid set of immunohistochemical markers, but not all necessarily demonstrate an aggressive clinical phenotype.
Campara, Zoran; Spasic, Aleksandar; Aleksic, Predrag; Milev, Bosko
Introduction: Aggressive fibromatosis (AF) is a heterogeneous group of mesenchymal tumors that have locally infiltrative growth and a tendency to relapse. The clinical picture is often conditioned by the obstruction of the ureter or small intestine. Diagnosis is based on clinical, radiological and histological parameters. A case report: We report a case of male patient, aged 35 years, with the retroperitoneal fibromatosis. He reported to the physician because of frequent urination with the feeling of pressure and pain. Computed tomography revealed the tumor mass on the front wall of the bladder with diameter of 70mm with signs of infiltration of the musculature of the anterior abdominal wall. Endoscopic transurethral biopsy showed proliferative lesion binders by type of fibromatosis. The tumor was surgically removed in a classical way. The patient feels well and has no recurrence thirty-six months after the operative procedure. Conclusion: The complete tumor resection is the therapeutic choice for the primary tumor as well as for a relapse. PMID:27147794
Mrevlje, Gorazd V
Psychology has a long tradition of considering human creativity as a distinct human characteristic and a special kind of human activity. After explaining the key motives for such an attitude, the author discusses those forms of healthy aggressiveness that stand out as necessary and constitutive elements of the creative process. Taking the well-known statement of C. G. Jung's 'The person who does not build (create), will demolish and destroy' as a starting point, the author compares the basic premises for understanding the process of human creativity, at the same time drawing on Freud's psychology of the individual and Jung's principle of the collective unconscious as well as his notion of 'complexes'. In doing so, the author somewhat boldly paraphrases Jung's dictum: 'In order to be creative, rather than just constructive, one must occasionally also destroy'. With reference to Wallas, Taylor and Neumann (Wallas 1926; Taylor 1959;;Neumann 2001), the author goes on to explore those concepts which help us to investigate the phenomenon of human creativity, drawing distinctions between emergent, expressive, productive, inventive and innovative creativity. The second part of the article discusses the importance of intelligence, originality, nonconformity, subversiveness and free-mindedness for the creative process of human beings. The author concludes with a further explanation of Erich Neumann's argument that human creativity cannot be understood solely as a result of sociogenetic factors, and argues that it is only by taking into consideration Jung's perception of creativity that a global ontological understanding of these processes can be achieved.
McCauley, C; Woods, K; Coolidge, C; Kulick, W
Independent rankings of humor and aggressiveness were obtained for sets of cartoons drawn randomly from two different magazines. The correlation of median humor and median aggressiveness rankings ranged from .49 to .90 in six studies involving six different sets of cartoons and six different groups of subjects, including children and adults, high and low socioeconomic status (SES) individuals, and native- and foreign-born individuals. This correlation is consistent with Freudian, arousal, and superiority theories of humor. Another prediction of Freudian theory, that high-SES subjects should be more appreciative of aggressive humor than low-SES subjects, was not supported.
Barling, Julian; Dupré, Kathryne E; Kelloway, E Kevin
Consistent with the relative recency of research on workplace aggression and the considerable media attention given to high-profile incidents, numerous myths about the nature of workplace aggression have emerged. In this review, we examine these myths from an evidence-based perspective, bringing greater clarity to our understanding of the predictors of workplace aggression. We conclude by pointing to the need for more research focusing on construct validity and prevention issues as well as for methodologies that minimize the likelihood of mono-method bias and that strengthen the ability to make causal inferences.
Kramkowski, K; Leszczynska, A; Przyborowski, K; Proniewski, B; Marcinczyk, N; Rykaczewska, U; Jarmoc, D; Chabielska, E; Chlopicki, S
In humans, short-term supplementation with nitrate is hypotensive and inhibits platelet aggregation via an nitric oxide (NO)-dependent mechanism. In the present work, we analyzed whether short-term treatment with nitrate induces antithrombotic effects in rats and mice. Arterial thrombosis was evoked electrically in a rat model in which renovascular hypertension was induced by partial ligation of the left renal artery. In mice expressing green fluorescent protein, laser-induced thrombosis was analyzed intravitally by using confocal microscope. Sodium nitrate (NaNO3) or sodium nitrite (NaNO2) was administered orally at a dose of 0.17 mmol/kg, twice per day for 3 days. Short-term nitrate treatment did not modify thrombus formation in either rats or mice, while nitrite administration led to pronounced antithrombotic activity. In hypertensive rats, nitrite treatment resulted in a significant decrease in thrombus weight (0.50 ± 0.08 mg vs. VEH 0.96 ± 0.09 mg; p < 0.01). In addition, nitrite inhibited ex vivo platelet aggregation and thromboxane B2 (TxB2) generation and prolonged prothrombin time. These effects were accompanied by significant increases in blood NOHb concentration and plasma nitrite concentration. In contrast, nitrate did not affect ex vivo platelet aggregation or prothrombin time and led to only slightly elevated nitrite plasma concentration. In mice, nitrate was also ineffective, while nitrite led to decreased platelet accumulation in the area of laser-induced endothelial injury. In conclusion, although nitrite induced profound NO-dependent antithrombotic effects in vivo, conversion of nitrates to nitrite in rats and mice over short-term 3-day treatment was not sufficient to elicit NO-dependent antiplatelet or antithrombotic effects.
Pompili, E; Carlone, C; Silvestrini, C; Nicolò, G
This work aims to define the aggression in all its forms, with notes on management and rapid tranquilization. The pathological aggression is described as a non-homogeneous phenomenon, it is variable in according to social, psychological and biological agents. The distinction of violence between affective aggression and predatory aggression can be functional to the prediction of outcome of any treatment. In general, a pattern of predatory violence tend to match with patients unresponsive and not compliant to treatment, a low probability to predict future violence and, therefore, a difficulty in managing risk. The affective aggressor, however, shows increased probability of treatment response, with more predictability of violent actions in reaction to situations perceived as threatening and, therefore, greater management of future violence risk. Those who act affective violence tend to show a wide range of emotional and cognitive problems, while those who act with predatory patterns show greater inclination to aggression and antisocial behavior. Aggression that occurs in psychiatry mostly appears to be affective, therefore susceptible to modulation through treatments.
The American Academy of Periodontology has developed the following parameter on the treatment of aggressive periodontitis. Patients should be informed of the disease process, therapeutic alternatives, potential complications, expected results, and their responsibility in treatment. Consequences of no treatment should be explained. Failure to treat aggressive periodontitis appropriately can result in progressive and often rapid loss of periodontal supporting tissues. This may have an adverse effect upon prognosis and could result in tooth loss. Given this information, patients (or their parents or guardians, as appropriate) should then be able to make informed decisions regarding their periodontal therapy.
Sakata, Chinatsu; Suzuki, Ken-Ichi; Morita, Yoshiaki; Kawasaki, Tomihisa
Clopidogrel (Plavix(®), Sanofi-Aventis), the adenosine diphosphate P2Y12 receptor antagonist, is reported to be effective in the prevention of cardiovascular events and is often used in combination with aspirin, particularly in high-risk patients. ASP6537 is a reversible cyclooxygenase (COX)-1 inhibitor that is under investigation as an anti-platelet agent. First, we investigated the reversibility of the antiplatelet effect of ASP6537 and its interaction with ibuprofen to compare the usability of ASP6537 with that of aspirin. We then evaluated the antithrombotic effect of ASP6537 in combination with clopidogrel using a FeCl3-induced thrombosis model in guinea pigs. ASP6537 exerted reversible antiplatelet activity, and no pharmacodynamic interaction with ibuprofen was noted. When administered as monotherapy, ASP6537 exerted a significant antithrombotic effect at ≥3mg/kg, while aspirin inhibited thrombosis at 100mg/kg. ASP6537 exerted significant additive effects in combination with clopidogrel, and the minimum antithrombotic dose was reduced by concomitant administration of clopidogrel. Our study showed that ASP6537 did not interact with ibuprofen and has clear additive effects in combination with clopidogrel. ASP6537 may therefore represent a promising antiplatelet agent for use in clinical settings in combination with clopidogrel.
Choo, Min-Kyung; Park, Eun-Kyung; Yoon, Hae-Kyung; Kim, Dong-Hyun
To evaluate the antithrombotic activities of puerarin and daidzin from the rhizome of Pueraria lobata, in vitro and ex vivo inhibitory activities of these compounds and their metabolite, daidzein, were measured. These compounds inhibited ADP- and collagen-induced platelet aggregation. Daidzein was the most potent. However, when puerarin and daidzin were intraperitoneally administered, their antiaggregation activities were weaker than when these compounds were administered orally. When in vivo antithrombotic activities of these compounds against collagen and epinephrine were measured, these compounds showed significant protection from death due to pulmonary thrombosis in mice. To evaluate the antiallergic activity of puerarin, daidzin, and daidzein, their inhibitory effects on the release of beta-hexosaminidase from RBL 2H3 cells and on the passive cutaneous anaphylaxis (PCA) reaction in mice were examined. Daidzein exhibited potent inhibitory activity on the beta-hexosaminidase release induced by DNP-BSA and potently inhibited the PCA reaction in rats. Daidzein administered intraperitoneally showed the strongest inhibitory activity and significantly inhibited the PCA reaction at doses of 25 and 50mg/kg with inhibitory activity of 37 and 73%, respectively. The inhibitory activity of intraperitoneally administered daidzein was stronger than those of intraperitoneally and orally administered puerarin and daidzin. Therefore we believe that puerarin and daidzin in the rhizome of Pueraria lobata are prodrugs, which have antiallergic and antithrombotic activities, produced by intestinal microflora.
Maas, Nadiezda C; Gracher, Ana Helena P; Sassaki, Guilherme L; Gorin, Philip A J; Iacomini, Marcello; Cipriani, Thales R
Citrus pectin (CP), a polysaccharide composed of [→4)-α-D-GalpA-(1→]n, was submitted to one or four carboxy-reduction cycles, resulting in CP-CR1 and CP-CR4, which had 40% and 2% of GalpA units, respectively. The polysaccharides were chemically sulfated and their anticoagulant and antithrombotic effects determined. Sulfated polysaccharides (CP-S, CP-CR1S and CP-CR4S) had different anticoagulant activities, doubling APTT at concentrations of 28.7, 13.2, and 4.9 μg/ml respectively. CP-CR1S and CP-CR4S also showed antithrombotic activity in vivo with ED50 of 3.01 and 1.70 mg/kg, respectively. Like heparin, they inhibited thrombin by a mechanism dependent on AT and HCII. Their hemorrhagic potential was also similar to that of heparin. According to methylation analysis, 91.1% and 50.2% of 6-O-position in CP-CR4S and CP-CR1S were sulfated, respectively. Therefore, substitution of carboxyl groups by sulfate esters in these polysaccharides increases the anticoagulant and antithrombotic effects.
Zhang, Qi-Chun; Zhao, Yue; Bian, Hui-Min
Our previous investigation had confirmed the inhibition of platelet aggregation of a novel Corni fructus-derived formula composed of malic acid, succinic acid and citric acid with a ratio of 3:2:2. The present study was to further evaluate the anti-thrombotic effect of the formula in vivo. Mice of acute pulmonary thromboembolism, and rats of arterial thrombosis were used to determine the anti-thrombotic effect of the formula. Histology analysis of endothelium was conducted with hematoxylin and eosin stain. TXB2 , 6-K-PGF1α , cAMP, cGMP and NO in rat plasma were determined. In vitro assay of αIIbβ3 and phosphorylation of ERK1/2 were performed in ADP-treated platelet. The formula significantly reduced the recovery time and mortality rate of mice with acute pulmonary thromboembolism. Remarkably extended occlusion time, decreased thrombus weight and more integrated endothelium were observed in rat with the formula. Enhanced 6-K-PGF1α , cGMP and NO, but not TXB2 and cAMP, were demonstrated in rat plasma with treatment of the formula. Finally, the formula was shown to inhibit αIIbβ3 expression and activation of ERK1/2 in platelet. The formula shows positive anti-thrombotic effect. The direct interference on ADP activated signaling in platelet and regulation of endothelium function are two primary pathways involved in the action on thrombosis.
Zullo, Angelo; Hassan, Cesare; Radaelli, Franco
Periprocedural management of antithrombotics for gastrointestinal endoscopy is a common clinical issue, given the widespread use of these drugs for primary and secondary cardiovascular prevention. For diagnostic procedures, with or without biopsy, no adjustments in antithrombotics are usually needed. For operative procedures, balancing the risk of periprocedural hemorrhage with the continuation of antithrombotics against the chance of recurrent thromboembolic events with their discontinuation may be challenging. Oral anticoagulants need to be temporarily withheld, and consideration must be given to whether a periendoscopic “bridge” therapy, typically a low-molecular-weight heparin, should be used in order to minimize the risk of thromboembolic events. Although some emerging evidence has shown that patients receiving heparin bridging appear to be at increased risk of overall and major bleeding and at similar risk of thromboembolic events compared to controls, bridging therapy is still recommended for patients on vitamin K antagonists who are at high thrombotic risk. Conversely, bridging therapy is usually not needed for patients taking new oral agents, which are characterized by shorter half-lives, and a rapid offset and onset of action. Management of antiplatelet therapy requires special care in patients on secondary prevention, especially those with coronary stents. This review is intended to summarize the recommendations of updated International Guidelines designed to help the decision-making process in such an intricate field. PMID:28042233
Vasudeva, Viren S; Chi, John H; Groff, Michael W
patient who underwent en bloc resection who continued to have back pain. CONCLUSIONS Gross-total resection or subtotal resection in combination with vertebroplasty or adjuvant radiation therapy to treat residual tumor seems sufficient in the treatment of aggressive vertebral hemangiomas. En bloc resection appears to provide a similar oncological benefit, but it carries higher morbidity to the patient.
Teles, Magda C; Oliveira, Rui F
Aggression is a complex behavior that influences social relationships and can be seen as adaptive or maladaptive depending on the context and intensity of expression. A model organism suitable for genetic dissection of the underlying neural mechanisms of aggressive behavior is still needed. Zebrafish has already proven to be a powerful vertebrate model organism for the study of normal and pathological brain function. Despite the fact that zebrafish is a gregarious species that forms shoals, when allowed to interact in pairs, both males and females express aggressive behavior and establish dominance hierarchies. Here, we describe two protocols that can be used to quantify aggressive behavior in zebrafish, using two different paradigms: (1) staged fights between real opponents and (2) mirror-elicited fights. We also discuss the methodology for the behavior analysis, the expected results for both paradigms, and the advantages and disadvantages of each paradigm in face of the specific goals of the study.
Ferris, Craig F
Vasopressin/oxytocin and related peptides comprise a phylogenetically old superfamily of chemical signals in both vertebrates and invertebrates. Each peptide isoform has its own distinct receptor subtype and specific cellular action. The conservation and dispersion of vasopressin/oxytocin signalling systems across the animal kingdom attests to their functional significance in evolution. Indeed, they are involved in the physiology of fluid balance, carbohydrate metabolism, thermoregulation, immunity and reproduction. In addition, these peptides evolved a role in social behaviours related to aggression and affiliation. The focus of this chapter is the role of vasopressin/oxytocin as chemical signals in the brain altering aggressive responding in a context- and species-dependent manner. There is compelling evidence from several mammalian species including humans that vasopressin enhances aggression. The activity of the vasopressin appears linked to the serotonin system providing a mechanism for enhancing and suppressing aggressive behaviour.
This paper briefly reviews some of the research areas which indicate a correlation between environmental factors and initiation of aggressive behavior. Environmental factors including lunar influences, month of birth, climate and the effects of crowding and certain chemicals are discussed.
Expression and/or activity of the SVCT2 ascorbate transporter may be decreased in many aggressive cancers, suggesting potential utility for sodium bicarbonate and dehydroascorbic acid in cancer therapy.
McCarty, Mark F
Hypoxia-inducible factor-1 (HIF-1) is a heterodimer transcription factor whose elevated activity in many cancers helps them to survive under hypoxic conditions and enhances their capacity to grow invasively, establish metastases, and survive chemo- or radiotherapy. Optimal intracellular levels of ascorbate suppress the level and transcriptional activity of HIF-1under normoxic or mildly hypoxic conditions by supporting the activity of proly and asparagyl hydroxylases that target HIF-1alpha. High intracellular ascorbate can also work in various ways to down-regulate activation of NF-kappaB which, like HIF-1 is constitutively active in many cancers and promotes aggressive behavior - in part by promoting transcription of HIF-1alpha. Yet recent evidence suggests that, even in the context of adequate ascorbate nutrition, the intracellular ascorbate content of many aggressive cancers may be supoptimal for effective HIF-1 control. This likely reflects low expression or activity of the SVCT2 ascorbate transporter. The expression of SVCT2 in cancers has so far received little study; but the extracellular acidity characteristic of many tumors would be expected to reduce the activity of this transporter, which has a mildly alkaline pH optimum. Unfortunately, since SVCT2 has a high affinity for ascorbate, and its activity is nearly saturated at normal healthy serum levels of this vitamin, increased oral administration of ascorbate would be unlikely to have much impact on the intracellular ascorbate content of tumors. However, cancers in which HIF-1 is active express high levels of glucose transporters such as GLUT-1, and these transporters can promote influx of dehydroascorbic acid (DHA) via facilitated diffusion; once inside the cell, DHA is rapidly reduced to ascorbate, which effectively is "trapped" within the cell. Hence, episodic intravenous infusions of modest doses of DHA may have potential for optimizing the intracellular ascorbate content of cancers, potentially
Feddersen-Petersen, D U
The science of ethology is concerned with the way external stimuli and internal events cause animals to fight in a particular way. The classification of dog breeds with respect to their relative danger to humans makes no sense, as both, the complex antecedent conditions in which aggressive behaviour occurs, and its ramifying consequences in the individual dog's ecological and social environment, are not considered. From a biological point of view, environmental and learning effects are always superimposed upon genetic influences. Based on the recent developments in the study of ethology, aggression of wolves (Canis lupus L.) and domesticated dogs (Canis lupus f. familiaris) was put into context with respect to other aspects of the lifestyle of wild and domestic canids. Aggressive behaviour does not occur in a biological vacuum. This is also true for domestic dogs and their relationship to human partners. Individual dogs can become highly aggressive and dangerous. Their development and social situation will be presented and discussed in case studies. Finally, there is the question about defining "normal aggression" versus symptoms for maladaptive aggression resp. danger to humans as conspecifics. It is possible to protect the safety of the public and at the the same time practise animal care. Effective animal control legislation must focus on responsible ownership and socialisation of pups f.e. Problems are not unique to some breeds.
Chen, Meng-Jinn; Miller, Brenda A.; Grube, Joel W.; Waiters, Elizabeth D.
Objective This study investigated whether young people’s substance use and aggressive behaviors are related to their listening to music containing messages of substance use and violence. Method Data were collected using self-administered questionnaires and from a sample of community college students aged 15-25 (N = 1056; 43% male). A structural equation modeling method was used to simultaneously assess the associations between listening to various genres of music, alcohol use, illicit drug use, and aggressive behaviors, taking into account respondents’ age, gender, race/ethnicity, and level of sensation seeking. Results Listening to rap music was significantly and positively associated with alcohol use, problematic alcohol use, illicit drug use, and aggressive behaviors when all other variables were controlled. Additionally, alcohol and illicit drug use were positively associated with listening to musical genres of techno and reggae. Control variables such as sensation seeking, age, gender and race/ethnicity were significantly related to substance use and aggressive behaviors. Conclusion The findings suggest that young people’s substance use and aggressive behaviors may be related to their frequent exposure to music containing references to substance use and violence. Conversely, music listening preference may reflect some personal predispositions or lifestyle preferences. Alternatively, substance use, aggression and music preference are independent constructs, but share common “third factors.” PMID:16608146
Björklund, Gunilla M
A sample of 98 drivers responded to a Swedish version of the UK Driving Anger Scale [UK DAS; [Lajunen, T., Parker, D., Stradling, S.G., 1998. Dimensions of driver anger, aggressive and highway code violations and their mediation by safety orientation in UK drivers. Transport. Res. Part F 1, 107-121]. The results indicated that the Swedish version, like the British original, measures three sources of driver irritation: "progress impeded", "reckless driving", and "direct hostility". Structural equation modelling was used to investigate the relationships between the three sources of self-reported driver irritation, aggressive actions, speed, sex, age, and annual mileage. The models suggested a positive relationship between the amount of driver irritation and frequency of aggressive actions for all three sources of irritation. Female drivers tended to become more irritated than male drivers, while the male drivers tended to act aggressively more often. Surprisingly, drivers who reported that they enjoy fast speeds did not become more irritated than slower drivers when obstructed. The important conclusions are that experienced irritation often leads to openly aggressively actions, and that expression of aggressive behaviours may be a cause of other drivers' feeling of irritation.
Wright, Michelle F; Li, Yan
This longitudinal study examined normative beliefs about aggression (e.g., face-to-face, cyber) in relation to the engagement in cyber aggression 6 months later among 126 (69 women) young adults. Participants completed electronically administered measures assessing their normative beliefs, face-to-face and cyber aggression at Time 1, and cyber aggression 6 months later (Time 2). We found that men reported more cyber relational and verbal aggression when compared to women. After controlling for each other, Time 1 face-to-face relational aggression was positively related to Time 2 cyber relational aggression, whereas Time 1 face-to-face verbal aggression was positively related to Time 2 cyber verbal aggression. Normative beliefs regarding cyber aggression was positively related to both forms of cyber aggression 6 months later, after controlling for normative beliefs about face-to-face aggression. Furthermore, a significant two-way interaction between Time 1 cyber relational aggression and normative beliefs about cyber relational aggression was found. Follow-up analysis showed that Time 1 cyber relational aggression was more strongly related to Time 2 cyber relational aggression when young adults held higher normative beliefs about cyber relational aggression. A similar two-way interaction was found for cyber verbal aggression such that the association between Time 1 and Time 2 cyber verbal aggression was stronger at higher levels of normative beliefs about cyber verbal aggression. Results are discussed in terms of the social cognitive and behavioral mechanisms associated with the engagement of cyber aggression.
Ben Sasson, Dvora; Somech, Anit
Purpose: Despite growing research on school aggression, significant gaps remain in the authors' knowledge of team aggression, since most studies have mainly explored aggression on the part of students. The purpose of this paper is to focus on understanding the phenomenon of workplace aggression in school teams. Specifically, the purpose of the…
He, Li; Giri, Tusar K.; Vicente, Cristina P.
Heparin cofactor II (HCII)–deficient mice form occlusive thrombi more rapidly than do wild-type mice following injury to the carotid arterial endothelium. Dermatan sulfate (DS) and heparan sulfate (HS) increase the rate of inhibition of thrombin by HCII in vitro, but it is unknown whether vascular glycosaminoglycans play a role in the antithrombotic effect of HCII in vivo. In this study, we found that intravenous injection of either wild-type recombinant HCII or a variant with low affinity for HS (K173H) corrected the abnormally short thrombosis time of HCII-deficient mice, while a variant with low affinity for DS (R189H) had no effect. When HCII was incubated with frozen sections of the mouse carotid artery, it bound specifically to DS in the adventitia. HCII was undetectable in the wall of the uninjured carotid artery, but it became concentrated in the adventitia following endothelial injury. These results support the hypothesis that HCII interacts with DS in the vessel wall after disruption of the endothelium and that this interaction regulates thrombus formation in vivo. PMID:18281504
Gogarten, W; Hoffmann, K; Van Aken, H
Neuraxial blockade confers benefits to surgical patients not only due to the high analgesic quality but also through a reduction in postoperative complications, such as respiratory insufficiency and a shortening of postoperative paralytic ileus. In orthopedic surgery peripheral and neuraxial blockades are extensively used to enhance postoperative mobilization. The most serious complication of neuraxial blockade is spinal epidural hematoma, which may lead to permanent paraplegia if left untreated. The risk is enhanced in patients receiving thromboembolism prophylaxis. Most national societies have issued guidelines with specific time intervals between application of antithrombotic drugs and subsequent neuraxial blockade to minimize this risk. From the viewpoint of an anesthesiologist it is preferable to start with chemical thromboembolism prophylaxis postoperatively as opposed to preoperatively, to administer all drugs in the evening and to limit the number of available drugs at each site. The safety of neuraxial blockade in the presence of the new oral anticoagulant rivaroxaban is currently unknown due to limited experience and dabigatran is considered contraindicated with indwelling epidural catheters according to the manufacturer.
Pomin, Vitor H
Marine sulfated polysaccharides (MSPs), such as sulfated fucans (SFs), sulfated galactans (SGs), and glycosaminoglycans (GAGs) isolated from invertebrate animals, are highly anionic polysaccharides capable of interacting with certain cationic proteins, such as (co)-factors of the coagulation cascade during clotting-inhibition process. Primarily, these molecular complexes between MSPs and coagulation-related proteins seem to be driven mostly by electrostatic interactions. However, through a systematic comparison using several novel well-defined sulfated polysaccharides composed of repetitive oligosaccharides with clear sulfation patterns, it was proved that those molecular interactions are essentially regulated by the stereochemistry of the glycans (which depends on a conjunction of anomeric configurations, sugar types, conformational preferences, glycosylation, and sulfation sites), rather than just a mere consequence of the electronegative density charges (mainly from number of sulfate groups). Here, we present an overview about the structure-function relationship of the invertebrate MSPs with regular structures as potential anticoagulant and antithrombotic agents, as pathologies related to the cardiovascular system are one of the major causes of mortality in the world.
Weng, Yunqi; Yao, Jian; Sparks, Sawyer; Wang, Kevin Yueju
Natto, a fermented soybean product, has been consumed as a traditional food in Japan for thousands of years. Nattokinase (NK), a potent blood-clot dissolving protein used for the treatment of cardiovascular diseases, is produced by the bacterium Bacillus subtilis during the fermentation of soybeans to produce Natto. NK has been extensively studied in Japan, Korea, and China. Recently, the fibrinolytic (anti-clotting) capacity of NK has been recognized by Western medicine. The National Science Foundation in the United States has investigated and evaluated the safety of NK. NK is currently undergoing a clinical trial study (Phase II) in the USA for atherothrombotic prevention. Multiple NK genes have been cloned, characterized, and produced in various expression system studies. Recombinant technology represents a promising approach for the production of NK with high purity for its use in antithrombotic applications. This review covers the history, benefit, safety, and production of NK. Opportunities for utilizing plant systems for the large-scale production of NK, or for the production of edible plants that can be used to provide oral delivery of NK without extraction and purification are also discussed. PMID:28264497
Bagadia, Ritvi K; Mohan, Anusha; Kandaswamy, Eswar; Chandrasekaran, Deepak
Abstract Introduction India lists high on patients suffering from diabetes, hypertension, stroke and myocardial infarction. Hence, a large proportion of the population is on long term Oral Antithrombotic Medications (OAM). Though several guidelines exist on dental management of these patients, previous surveys have shown variation among the dentists. Aim The purpose of this study was to assess the knowledge, attitude and practice of dentists in Chennai, India, towards dental management of patients taking OAM using a questionnaire survey. Materials and Methods The survey was conducted among 256 dentists in Chennai, India using a printed questionnaire containing 16 questions, at their university location. Descriptive statistical analysis was used to analyze the data. Results Of the final population of dentists who were included in the survey (n =212), majority of them were aware about drugs such as warfarin and aspirin compared to other newer drugs (dabigatran, rivaroxaban). Most participants took physician’s opinion before proceeding with any invasive dental procedure and thromboembolic events were their major concern while treating patients on OAM. Conclusion The survey revealed dentists are knowledgeable about management of patients on OAM. However, they tend to overestimate the bleeding risk, thus being cautious in their treatment approach. Based on the results of the study, the authors suggest that continuing dental education programs and further training on management of such medically complex patients will be beneficial in order to provide optimum dental care to people taking OAM. PMID:28274053
Dahmer, Tabitha; Berger, Markus; Barlette, Adriana Gregory; Reck, José; Segalin, Jéferson; Verza, Simone; Ortega, George González; Gnoatto, Simone Cristina Baggio; Guimarães, Jorge Almeida; Verli, Hugo; Gosmann, Grace
The triterpene chikusetsusaponin IVa was isolated from the fruit of Ilex paraguariensis. Using biochemical and pharmacological methods, we demonstrated that chikusetsusaponin IVa (1) prolongs the recalcification time, prothrombin time, activated partial thromboplastin time, and thrombin time of normal human plasma in a dose-dependent manner, (2) inhibits the amidolytic activity of thrombin and factor Xa upon synthetic substrates S2238 and S2222, (3) inhibits thrombin-induced fibrinogen clotting (50% inhibition concentration, 199.4 ± 9.1 μM), and (4) inhibits thrombin- and collagen-induced platelet aggregation. The results also indicate that chikusetsusaponin IVa preferentially inhibits thrombin in a competitive manner (K(i)=219.6 μM). Furthermore, when administered intravenously to rats, chikusetsusaponin IVa inhibited thrombus formation in a stasis model of venous thrombosis, although it did not induce a significant bleeding effect. Chikusetsusaponin IVa also prolonged the ex vivo activated partial thromboplastin time. Altogether, these data suggest that chikusetsusaponin IVa exerts antithrombotic effects, including minor hemorrhagic events. This appears to be important for the development of new therapeutic agents.
Fuentes, Eduardo; Rodríguez-Pérez, Wilson; Guzmán, Luis; Alarcón, Marcelo; Navarrete, Simón; Forero-Doria, Oscar; Palomo, Iván
Fruit from the palm Mauritia flexuosa is one of the most important species in Peru, Venezuela, Brazil, Colombia, Bolivia, and Guyana. The present study aimed to investigate the antiplatelet and antithrombotic activities of oil extracted from Mauritia flexuosa. The fatty acid contents were determined by gas chromatography-mass spectrometry. Oil extract of peel of Mauritia flexuosa was extracted by soxhlet extraction. The oil extract inhibited platelet secretion and aggregation induced by ADP, collagen, and TRAP-6 by a concentration-dependent way (0.1 to 1 mg/mL) without the participation of the adenylyl cyclase pathway and diminished platelet rolling and firm adhesion under flow conditions. Furthermore, the oil extract induced a marked increase in the rolling speed of leukocytes retained on the platelet surface, reflecting a reduction of rolling and less adhesion. At the concentrations used, the oil extract significantly decreased platelet release of sP-selectin, an atherosclerotic-related inflammatory mediator. Oil extract inhibited thrombus growth at the same concentration as that of aspirin, a classical reference drug. Finally, the data presented herein also demonstrate for the first time to our knowledge the protective effect of oil extracted from Mauritia flexuosa on platelet activation and thrombosis formation.
Fuentes, Eduardo; Rodríguez-Pérez, Wilson; Guzmán, Luis; Alarcón, Marcelo; Navarrete, Simón; Forero-Doria, Oscar; Palomo, Iván
Fruit from the palm Mauritia flexuosa is one of the most important species in Peru, Venezuela, Brazil, Colombia, Bolivia, and Guyana. The present study aimed to investigate the antiplatelet and antithrombotic activities of oil extracted from Mauritia flexuosa. The fatty acid contents were determined by gas chromatography—mass spectrometry. Oil extract of peel of Mauritia flexuosa was extracted by soxhlet extraction. The oil extract inhibited platelet secretion and aggregation induced by ADP, collagen, and TRAP-6 by a concentration-dependent way (0.1 to 1 mg/mL) without the participation of the adenylyl cyclase pathway and diminished platelet rolling and firm adhesion under flow conditions. Furthermore, the oil extract induced a marked increase in the rolling speed of leukocytes retained on the platelet surface, reflecting a reduction of rolling and less adhesion. At the concentrations used, the oil extract significantly decreased platelet release of sP-selectin, an atherosclerotic-related inflammatory mediator. Oil extract inhibited thrombus growth at the same concentration as that of aspirin, a classical reference drug. Finally, the data presented herein also demonstrate for the first time to our knowledge the protective effect of oil extracted from Mauritia flexuosa on platelet activation and thrombosis formation. PMID:24454503
Weng, Yunqi; Yao, Jian; Sparks, Sawyer; Wang, Kevin Yueju
Natto, a fermented soybean product, has been consumed as a traditional food in Japan for thousands of years. Nattokinase (NK), a potent blood-clot dissolving protein used for the treatment of cardiovascular diseases, is produced by the bacterium Bacillus subtilis during the fermentation of soybeans to produce Natto. NK has been extensively studied in Japan, Korea, and China. Recently, the fibrinolytic (anti-clotting) capacity of NK has been recognized by Western medicine. The National Science Foundation in the United States has investigated and evaluated the safety of NK. NK is currently undergoing a clinical trial study (Phase II) in the USA for atherothrombotic prevention. Multiple NK genes have been cloned, characterized, and produced in various expression system studies. Recombinant technology represents a promising approach for the production of NK with high purity for its use in antithrombotic applications. This review covers the history, benefit, safety, and production of NK. Opportunities for utilizing plant systems for the large-scale production of NK, or for the production of edible plants that can be used to provide oral delivery of NK without extraction and purification are also discussed.
Sunagawa, Masanori Nakamura, Mariko; Kosugi, Tadayoshi
The habutobin cDNA was cloned from total RNA extracted from venom glands of Trimeresurus flavoviridis (the habu snake). The conceptual translation of 1539 bp of habutobin cDNA consists of 236 amino acids and its molecular weight is 25.7 kDa. Histidine (His)-tagged recombinant habutobin fusion protein, pET-r-habutobin and AcNPV-r-habutobin, was purified by bacterial system and baculoviral system, respectively. After refolding pET-r-habutobin, there were two protein bands at about 32 kDa and 65 kDa, indicating that habutobin might be produced as a monomer protein and processed to form two concatenated protein. Purified AcNPV-r-habutobin dose-dependently increased fibrin forming activity and inhibited collagen-induced aggregation of rabbit washed platelets. Thus, AcNPV-r-habutobin produced by baculoviral system is very useful for study on structure-function relationship, which is necessary for developing an antithrombotic drug from habutobin.
Kraft, Peter; De Meyer, Simon F; Kleinschnitz, Christoph
The present antithrombotic drugs used to treat or prevent ischemic stroke have significant limitations: either they show only moderate efficacy (platelet inhibitors), or they significantly increase the risk for hemorrhages (thrombolytics, anticoagulants). Although most strokes are caused by thrombotic or embolic vessel occlusions, the pathophysiological role of platelets and coagulation is largely unclear. The introduction of novel transgenic mouse models and specific coagulation inhibitors facilitated a detailed analysis of molecular pathways mediating thrombus formation in models of acute ischemic stroke. Prevention of early platelet adhesion to the damaged vessel wall by blocking platelet surface receptors glycoprotein Ib alpha (GPIbα) or glycoprotein VI (GPVI) protects from stroke without provoking bleeding complications. In addition, downstream signaling of GPIbα and GPVI has a key role in platelet calcium homeostasis and activation. Finally, the intrinsic coagulation cascade, activated by coagulation factor XII (FXII), has only recently been identified as another important mediator of thrombosis in cerebrovascular disease, thereby disproving established concepts. This review summarizes the latest insights into the pathophysiology of thrombus formation in the ischemic brain. Potential clinical merits of novel platelet inhibitors and anticoagulants as powerful and safe tools to combat ischemic stroke are discussed. PMID:22805877
Fisher, Caroline A; Brown, Anahita
Aggression is common in Huntington's disease. However, at present there are no standard guidelines for managing aggression in Huntington's sufferers due to a lack of empirical research. This paper presents a case study of the treatment of very high levels of aggression with sensory modulation and behaviour support intervention in a Huntington's sufferer. The client exhibited a range of aggressive behaviours, including physical aggression to people, furniture and objects, and verbal aggression. Following an eight week baseline phase, five weeks of sensory modulation intervention were employed. A behaviour support plan was then implemented as an adjunct to the sensory intervention, with aggressive behaviour systematically audited for a further 11 weeks. The results indicate a significant reduction in reported levels of aggression during the combined sensory modulation and behaviour support phase, compared to both the baseline and the sensory modulation therapy alone phases. This case study highlights the efficacy non-pharmacological interventions may have for reducing aggression in HD.
Conversion therapy comes in many forms, ranging from informal chats with counselors to aggressive physical coercion, but all are based on the belief that a gay male or a lesbian can be changed "back" to heterosexual behavior. It is not just alarmed parents who turn to this therapy. Many LGBT individuals seek out such treatment in an effort to…
Field, Tiffany; Diego, Miguel; Hernandez-Reif, Maria
Massage therapy has been notably effective in preventing prematurity, enhancing growth of infants, increasing attentiveness, decreasing depression and aggression, alleviating motor problems, reducing pain, and enhancing immune function. This review covers massage therapy research from the last decade, as an update to the American Psychologist 1998…
van Lier, Pol; Boivin, Michel; Dionne, Ginette; Vitaro, Frank; Brendgen, Mara; Koot, Hans; Tremblay, Richard E.; Perusse, Daniel
Objective: To examine whether kindergarten children's genetic liability to physically aggress moderates the contribution of friends' aggression to their aggressive behaviors. Method: Teacher and peer reports of aggression were available for 359 6-year-old twin pairs (145 MZ, 212 DZ) as well as teacher and peer reports of aggression of the two best…
Benvenga, Salvatore; Koch, Christian A
The most common thyroid malignancy is papillary thyroid cancer (PTC). Mortality rates from PTC mainly depend on its aggressiveness. Geno- and phenotyping of aggressive PTC has advanced our understanding of treatment failures and of potential future therapies. Unraveling molecular signaling pathways of PTC including its aggressive forms will hopefully pave the road to reduce mortality but also morbidity from this cancer. The mitogen-activated protein kinase and the phosphatidylinositol 3-kinase signaling pathway as well as the family of RAS oncogenes and BRAF as a member of the RAF protein family and the aberrant expression of microRNAs miR-221, miR-222, and miR-146b all play major roles in tumor initiation and progression of aggressive PTC. Small molecule tyrosine kinase inhibitors targeting BRAF-mediated events, vascular endothelial growth factor receptors, RET/PTC rearrangements, and other molecular targets, show promising results to improve treatment of radioiodine resistant, recurrent, and aggressive PTC. PMID:24955023
Barón Duarte, F J; Rodríguez Calvo, M S; Amor Pan, J R
Aggressiveness criteria proposed in the scientific literature a decade ago provide a quality judgment and are a reference in the care of patients with advanced cancer, but their use is not generalized in the evaluation of Oncology Services. In this paper we analyze the therapeutic aggressiveness, according to standard criteria, in 1.001 patients with advanced cancer who died in our Institution between 2010 and 2013. The results seem to show that aggressiveness at the end of life is present more frequently than experts recommend. About 25% of patients fulfill at least one criterion of aggressiveness. This result could be explained by a liquid Oncology which does not prioritize the patient as a moral subject in the clinical appointment. Medical care is oriented to necessities and must be articulated in a model focused on dignity and communication. Its implementation through Advanced Care Planning, consideration of patient's values and preferences, and Limitation of therapeutic effort are ways to reduce aggressiveness and improve clinical practice at the end of life. We need to encourage synergic and proactive attitudes, adding the best of cancer research with the best clinical care for the benefit of human being, moral subject and main goal of Medicine.
Smith, Stephanie D.; McCauley, Spencer A.; Ibrahim, Karim; Piasecka, Justyna B.
Abstract Objective: Anger, irritability, and aggression are among the most common reasons for child mental health referrals. This review is focused on two forms of behavioral interventions for these behavioral problems: Parent management training (PMT) and cognitive-behavioral therapy (CBT). Methods: First, we provide an overview of anger/irritability and aggression as the treatment targets of behavioral interventions, followed by a discussion of the general principles and techniques of these treatment modalities. Then we discuss our current work concerning the transdiagnostic approach to CBT for anger, irritability, and aggression. Results: PMT is aimed at improving aversive patterns of family interactions that engender children's disruptive behavior. CBT targets deficits in emotion regulation and social problem-solving that are associated with aggressive behavior. Both forms of treatment have received extensive support in randomized controlled trials. Given that anger/irritability and aggressive behavior are common in children with a variety of psychiatric diagnoses, a transdiagnostic approach to CBT for anger and aggression is described in detail. Conclusions: PMT and CBT have been well studied in randomized controlled trials in children with disruptive behavior disorders, and studies of transdiagnostic approaches to CBT for anger and aggression are currently underway. More work is needed to develop treatments for other types of aggressive behavior (e.g., relational aggression) that have been relatively neglected in clinical research. The role of callous-unemotional traits in response to behavioral interventions and treatment of irritability in children with anxiety and mood disorders also warrants further investigation. PMID:26745682
Lawver, Timothy; Blankenship, Kelly
Play therapy is a treatment modality in which the therapist engages in play with the child. Its use has been documented in a variety of settings and with a variety of diagnoses. Treating within the context of play brings the therapist and the therapy to the level of the child. By way of an introduction to this approach, a case is presented of a six-year-old boy with oppositional defiant disorder. The presentation focuses on the events and interactions of a typical session with an established patient. The primary issues of the session are aggression, self worth, and self efficacy. These themes manifest themselves through the content of the child’s play and narration of his actions. The therapist then reflects these back to the child while gently encouraging the child toward more positive play. Though the example is one of nondirective play therapy, a wide range of variation exists under the heading of play therapy. PMID:19724720
Sentürk, S; Yalçin, E; Pentürk, S
Serum lipids and lipoprotein concentrations have been associated with dominance aggression in humans. The aim of this study was to investigate the link between serum lipids, including cholesterol, triglyceride, high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), total cholesterol (TC) to HDL-C ratio and dominance aggression in dogs. Levels of serum TC, triglyceride and HDL-C were significantly lower in dogs with dominance aggression compared with non-aggressive dogs (P < 0.001). These results suggest that a relationship exists between serum lipid profile and dominance aggression in dogs, and hypocholesterolaemia exists in dogs with dominance aggression.
Zwarts, Liesbeth; Versteven, Marijke; Callaerts, Patrick
Aggressive behavior is widely present throughout the animal kingdom and is crucial to ensure survival and reproduction. Aggressive actions serve to acquire territory, food, or mates and in defense against predators or rivals; while in some species these behaviors are involved in establishing a social hierarchy. Aggression is a complex behavior, influenced by a broad range of genetic and environmental factors. Recent studies in Drosophila provide insight into the genetic basis and control of aggression. The state of the art on aggression in Drosophila and the many opportunities provided by this model organism to unravel the genetic and neurobiological basis of aggression are reviewed. PMID:22513455
Ye, Siqin; Cheng, Bin; Lip, Gregory Y. H.; Buchsbaum, Richard; Sacco, Ralph L.; Levin, Bruce; Di Tullio, Marco R.; Qian, Min; Mann, Douglas L.; Pullicino, Patrick M.; Freudenberger, Ronald S.; Teerlink, John R.; Mohr, J.P.; Graham, Susan; Labovitz, Arthur J.; Estol, Conrado J.; Lok, Dirk J.; Ponikowski, Piotr; Anker, Stefan D.; Thompson, John L.P.; Homma, Shunichi
We sought to assess the performance of existing bleeding risk scores, such as HAS-BLED or OBRI, in patients with heart failure with reduced ejection fraction (HFrEF) in sinus rhythm (SR) treated with warfarin or aspirin. We calculated HAS-BLED and OBRI risk scores for 2,305 patients with HFrEF in SR enrolled in the Warfarin versus Aspirin in Reduced Cardiac Ejection Fraction (WARCEF) trial. Proportional hazards models were used to test whether each score predicted major bleeding, and comparison of different risk scores was performed using Harell’s c-statistic and net-reclassification improvement (NRI) index. For the warfarin arm, both scores predicted bleeding risk, with OBRI having significantly higher c-statistic (0.72 vs 0.61; p=0.03) compared to HAS-BLED, though the NRI for comparing OBRI to HAS-BLED was not significant (0.32, 95% CI - 0.18-0.37). Performance of the OBRI and HAS-BLED risk scores were similar for the aspirin arm. For participants with OBRI score of 0 to 1, warfarin compared with aspirin reduced ischemic stroke (HR 0.51, 95% CI 0.26-0.98, p=0.042) without significantly increasing major bleeding (HR 1.24, 95% CI 0.66-2.30, p=0.51). For those with OBRI score of ≥2, there was a trend for reduced ischemic stroke with warfarin compared to aspirin (HR 0.56, 95% CI 0.27-1.15, p=0.12), but major bleeding was increased (HR 4.04, 95% CI 1.99-8.22, p<0.001). In conclusion, existing bleeding risk scores can identify bleeding risk in HFrEF patients in SR, and could be tested for potentially identifying patients with a favorable risk / benefit profile for antithrombotic therapy with warfarin. PMID:26189039
Grigor'eva, M E; Lyapina, L A
Blood coagulation was enhanced and all factors (total, enzyme, and non-enzyme) of the fibrinolytic system were suppressed in rats in 60 min after forced swimming test. Argininecontaining tetrapeptide glyproline Arg-Pro-Gly-Pro administered prior to this test activated fibrinolysis and prevented hypercoagulation. Administration of this peptide in 5 min after swimming test also enhanced anticoagulant, fibrinolytic, and antithrombotic activity of the blood. Therefore, glyproline Arg-Pro-Gly-Pro exerted both preventive and curative effects on the hemostasis system and prevented enhancement of blood coagulation provoked by emotional stress modeled by forced swimming test.
West, C.B. Jr.; Shagets, F.W.; Mansfield, M.J. )
Aggressive fibromatosis is a poorly defined, locally aggressive, yet histologically benign fibroblastic proliferative lesion that may occur in the head and neck. The lesion is highly cellular and locally infiltrative and has a propensity to invade and erode bone, compromising vital structures within the head and neck. However, it is not a true malignancy because it does not have malignant cytologic characteristics nor does it metastasize. We present two cases of aggressive fibromatosis occurring in young adult men. The first case involved a rapidly enlarging mass of the anterior maxilla that involved the upper lip, nasal alae, nasal septum, inferior turbinates, and hard palate. The patient underwent incisional biopsy to confirm the diagnosis. Because of difficulty in determining the actual margins of this extensive lesion and the significant morbidity that would have resulted from surgical resection, we elected to treat this patient with chemotherapy and radiation therapy. The second case was an extensive lesion involving the right temporal bone, pterygomaxillary space, and infratemporal, temporal, and middle cranial fossae. Incisional biopsy confirmed the diagnosis. Because of the lack of functional and cosmetic deficits and the unavoidable morbidity of a surgical resection, this patient was treated with radiation therapy. Although wide field resection is the most satisfactory form of treatment, in situations in which this modality would result in unacceptable morbidity or if surgical margins are positive, then radiation therapy and chemotherapy should be considered. Support for these therapeutic modalities is found in larger series of cases outside the head and neck.
Clark, Danielle; Febbraio, Maria; Levin, Liran
Aggressive periodontal disease is an oral health mystery. Our current understanding of this disease is that specific bacteria invade the oral cavity and the host reacts with an inflammatory response leading to mass destruction of the alveolar bone. Aggressive periodontal disease is typically observed in a population under the age of 30 and occurs so rapidly that it is difficult to treat. Unfortunately, the consequence of this disease frequently involves tooth extractions. As a result, the aftermath is chewing disability and damage to self-esteem due to an altered self-image. Furthermore, patients are encumbered by frequent dental appointments which have an economic impact in regards to both personal financial strain and absent days in the workplace. Aggressive periodontal disease has a tremendous effect on patients' overall quality of life and needs to be investigated more extensively in order to develop methods for earlier definitive diagnosis and effective treatments. One of the mysteries of aggressive periodontal disease is the relatively nominal amount of plaque present on the tooth surface in relation to the large amount of bone loss. There seems to be a hidden factor that lies between the response by the patient's immune system and the bacterial threat that is present. A better mechanistic understanding of this disease is essential to provide meaningful care and better outcomes for patients.
Horrigan, Joseph P.; Barnhill, L. Jarrett
In this study, 11 males with autism and mental retardation were administered risperidone. Substantial clinical improvement was noted almost immediately; patients with aggression, self-injury, explosivity, and poor sleep hygiene were most improved. The modal dose for optimal response was 0.5 mg bid. Weight gain was a significant side effect.…
Bryan, Clifford; Horton, Robert
Several hypotheses are developed regarding fans and their behavior based upon a review of the literature. An exploratory study is then described, in which participant observers at a university sports arena observed cases of aggressive behavior among the spectators. Based upon the literature review and the findings of the study, four…
Foster, Hilliard G., Jr.; Spitz, Reuben T.
Examines biochemical measures in a population of forensic psychiatric inpatients. Regression equations utilizing chemical and biological variables were developed and evaluated to determine their value in predicting the severity and frequency of aggression. Findings strongly suggest the presence of specific biochemical alteration among those…
Nesdale, Drew; Pickering, Kaye
Drawing on social schema theory (Fiske & Taylor, 1991) and social identity theory (Tajfel & Turner, 1979), this study examined the impact on teachers' reactions to children's aggression of three variables, two of which were related to the aggressors and one was related to the teachers. Experienced female elementary school teachers (N=90) each read…
Arriaga, Ximena B; Capezza, Nicole M; Daly, Christine A
What determines whether people tolerate partner aggression? This research examined how norms, relationship experiences, and commitment predict personal standards for judging aggressive acts by a partner. Studies 1a and 1b (n = 689) revealed that experiencing aggression in a current relationship and greater commitment predicted greater tolerance for common partner aggression. Study 2 longitudinally tracked individuals who had never experienced partner aggression (n = 52). Once aggression occurred, individuals adopted more tolerant standards, but only if they were highly committed. Study 3 involved experimentally manipulating the relevance of partner aggression among individuals who reported current partner aggression (n = 73); they were more tolerant of aggressive acts imagined to occur by their partner (vs. the same acts by a stranger), but only if they were highly committed. Personal standards for judging partner aggression are dynamic. They shift toward greater tolerance when committed people experience aggression in a current relationship.
Ireland, Jane L; Adams, Christine
The current study explores associations between implicit and explicit aggression in young adult male prisoners, seeking to apply the Reflection-Impulsive Model and indicate parity with elements of the General Aggression Model and social cognition. Implicit cognitive aggressive processing is not an area that has been examined among prisoners. Two hundred and sixty two prisoners completed an implicit cognitive aggression measure (Puzzle Test) and explicit aggression measures, covering current behaviour (DIPC-R) and aggression disposition (AQ). It was predicted that dispositional aggression would be predicted by implicit cognitive aggression, and that implicit cognitive aggression would predict current engagement in aggressive behaviour. It was also predicted that more impulsive implicit cognitive processing would associate with aggressive behaviour whereas cognitively effortful implicit cognitive processing would not. Implicit aggressive cognitive processing was associated with increased dispositional aggression but not current reports of aggressive behaviour. Impulsive implicit cognitive processing of an aggressive nature predicted increased dispositional aggression whereas more cognitively effortful implicit cognitive aggression did not. The article concludes by outlining the importance of accounting for implicit cognitive processing among prisoners and the need to separate such processing into facets (i.e. impulsive vs. cognitively effortful). Implications for future research and practice in this novel area of study are indicated.
Dupré, Kathryne E; Barling, Julian
The authors examined factors that lead to and prevent aggression toward supervisors at work using two samples: doctoral students and correctional service guards. The results supported that perceived interpersonal injustice mediates the relationship between perceptions of supervisory control over work performance and psychological aggression directed at supervisors, and further that psychological aggression toward supervisors is positively associated with physical acts of aggression directed at supervisors, supporting the notion of an escalation of aggressive workplace behaviors. Moreover, employees' perceptions of organizational sanctions (i.e., negative consequences for disobeying organizational policies) against aggression appear to play an important role in the prevention of workplace aggression by moderating the relationship between injustice and aggression targeting supervisors.
Falk, Örjan; Sfendla, Anis; Brändström, Sven; Anckarsäter, Henrik; Nilsson, Thomas; Kerekes, Nóra
Gender specific personality profiles in association with the level of aggressive antisocial behavior in offenders have not been previously investigated. In the present study we analyzed data collected from 65 male and 50 female offenders using structured protocols regarding criminal history (by criminal register data), trait aggression (by the Life History of Aggression (LHA) questionnaire), and personality profiles (by the Temperament and Character Inventory (TCI)). Prison inmates differed significantly on several personality dimensions, most pronouncedly were they characterized with low character maturity (low scores in the Self-Directedness and Cooperativeness dimensions of TCI) when compared to gender and age matched controls of the general population. The majority of offenders scored distinctively high on trait aggression. There were moderate to strong associations between the personality dimensions and each of the subscales of LHA (Aggression, Self-directed Aggression and Antisocial behavior). These associations were stronger in the female offender sample. Trait aggression could be best explained by a model, which included male gender, younger age, high novelty seeking temperament and low character maturity. Our results suggest that therapies aiming at strengthening self-governance and increasing cooperativeness (focusing on character maturity) may alleviate aggressive antisocial behavior in offenders.
Kawaguchi, Tatsushi; Spencer, Doran B; Mochizuki, Manabu
Acute retinal necrosis is a progressive necrotizing retinopathy caused by herpes simplex virus (HSV) or varicella zoster virus (VZV). The mainstay of its treatment is antiviral therapy against these pathogenic organisms, such as intravenous acyclovir or oral valacyclovir. Systemic and topical corticosteroids together with antiviral therapy are used as an anti-inflammatory treatment to minimize damages to the optic nerve and retinal blood vessels. Because the majority of severe cases of the disease show occlusive retinal vasculitis, a low dosage of aspirin is used as anti-thrombotic treatment. Vitreo-retinal surgery is useful to repair rhegmatogenous retinal detachment, one of the main late-stage complications. Moreover, recent articles have reported some encouraging results of prophylactic vitrectomy before rhegmatogenous retinal detachment occurs. The efficacy of laser photocoagulation to prevent the development or extension of rhegmatogenous retinal detachment is controversial. Despite these treatments, the visual prognosis of acute retinal necrosis is still poor, in particular VZV-induced acute retinal necrosis.
Keramidas, Evangelos G; Miller, Gavin; Revelos, Kyriakos; Kitsanta, Panagiota; Page, Robert E
Aggressive digital papillary adenocarcinoma and aggressive digital papillary adenoma are rare tumours of the sweat glands. They are most common in the most distal part of the fingers and are locally aggressive with a 50% local recurrence rate; 14% of tumours metastasize. We present two cases.
Russell, Gordon W.; de Graaf, Jane P.
Tested lunar-aggression hypothesis using the aggressive penalties awarded in ice hockey over a season of competition. Interpersonal aggression was found to be unrelated to either the synodic or anomalistic cycles. Discussion centers on the persistence of lunar beliefs and their links to the literature on selective exposure and interpersonal…
Hemalatha, K L; Stanely Mainzen Prince, P
Myocardial infarction continues to be a major public health problem. Reduction in mortality rate and prevention of myocardial infarction are of utmost importance. Inflammation and thrombosis play an important role in the pathogenesis of myocardial infarction. The anti-inflammatory and anti-thrombotic effects of zingerone were evaluated in isoproterenol induced myocardial infarcted rats. Rats were pretreated with zingerone (6mg/kg body weight) daily for 14 days and were then induced myocardial infarction with isoproterenol (100mg/kg body weight) on 15th and 16th day. Isoproterenol induced myocardial infarcted rats showed significant (P<0.05) increase in the levels/ activities of cardiac troponin-I (cTnI), high sensitive C-reactive protein (Hs CRP), lysosomal hydrolases in the serum and concentration of heart lysosomal lipid peroxidation (LPO) products. RT-PCR study revealed over expression of myocardial tumour necrosis factor - alpha (TNF-α), interleukin-1β (IL-1β) and interleukin-6 (IL-6) genes in the myocardial infarcted rats. Histopathology of heart and coronary artery revealed marked inflammation and coronary thrombosis. Zingerone pretreatment significantly (P<0.05) decreased serum cTnI, Hs CRP, lysosomal hydrolases and heart lysosomal LPO and down regulated myocardial TNF-α, IL-1β and IL-6 genes and prevented coronary thrombosis in isoproterenol induced myocardial infarcted rats. The observed effects of zingerone could be attributed to its anti-inflammatory and anti-thrombotic properties.
Shivanna, Sowmya; Kolandaivelu, Kumaran; Shashar, Moshe; Belghasim, Mostafa; Al-Rabadi, Laith; Balcells, Mercedes; Zhang, Anqi; Weinberg, Janice; Francis, Jean; Pollastri, Michael P.; Edelman, Elazer R.; Sherr, David H.
Patients with CKD suffer high rates of thrombosis, particularly after endovascular interventions, yet few options are available to improve management and reduce thrombotic risk. We recently demonstrated that indoxyl sulfate (IS) is a potent CKD-specific prothrombotic metabolite that induces tissue factor (TF) in vascular smooth muscle cells (vSMCs), although the precise mechanism and treatment implications remain unclear. Because IS is an agonist of the aryl hydrocarbon receptor (AHR), we first examined the relationship between IS levels and AHR-inducing activity in sera of patients with ESRD. IS levels correlated significantly with both vSMC AHR activity and TF activity. Mechanistically, we demonstrated that IS activates the AHR pathway in primary human aortic vSMCs, and further, that AHR interacts directly with and stabilizes functional TF. Antagonists directly targeting AHR enhanced TF ubiquitination and degradation and suppressed thrombosis in a postinterventional model of CKD and endovascular injury. Furthermore, AHR antagonists inhibited TF in a manner dependent on circulating IS levels. In conclusion, we demonstrated that IS regulates TF stability through AHR signaling and uncovered AHR as an antithrombotic target and AHR antagonists as a novel class of antithrombotics. Together, IS and AHR have potential as uremia-specific biomarkers and targets that may be leveraged as a promising theranostic platform to better manage the elevated thrombosis rates in patients with CKD. PMID:26019318
Shivanna, Sowmya; Kolandaivelu, Kumaran; Shashar, Moshe; Belghasim, Mostafa; Al-Rabadi, Laith; Balcells, Mercedes; Zhang, Anqi; Weinberg, Janice; Francis, Jean; Pollastri, Michael P; Edelman, Elazer R; Sherr, David H; Chitalia, Vipul C
Patients with CKD suffer high rates of thrombosis, particularly after endovascular interventions, yet few options are available to improve management and reduce thrombotic risk. We recently demonstrated that indoxyl sulfate (IS) is a potent CKD-specific prothrombotic metabolite that induces tissue factor (TF) in vascular smooth muscle cells (vSMCs), although the precise mechanism and treatment implications remain unclear. Because IS is an agonist of the aryl hydrocarbon receptor (AHR), we first examined the relationship between IS levels and AHR-inducing activity in sera of patients with ESRD. IS levels correlated significantly with both vSMC AHR activity and TF activity. Mechanistically, we demonstrated that IS activates the AHR pathway in primary human aortic vSMCs, and further, that AHR interacts directly with and stabilizes functional TF. Antagonists directly targeting AHR enhanced TF ubiquitination and degradation and suppressed thrombosis in a postinterventional model of CKD and endovascular injury. Furthermore, AHR antagonists inhibited TF in a manner dependent on circulating IS levels. In conclusion, we demonstrated that IS regulates TF stability through AHR signaling and uncovered AHR as an antithrombotic target and AHR antagonists as a novel class of antithrombotics. Together, IS and AHR have potential as uremia-specific biomarkers and targets that may be leveraged as a promising theranostic platform to better manage the elevated thrombosis rates in patients with CKD.
Gollapalli, Rajesh Babu; Naiman, Ana Nusa; Merry, David
Cervical necrotizing fasciitis secondary to epiglottitis is rare. The standard treatment of this severe condition has long been early and aggressive surgical debridement and adequate antimicrobial therapy. We report the case of an immunocompetent 59-year-old man who developed cervical necrotizing fasciitis as a complication of acute epiglottitis. We were able to successfully manage this patient with conservative surgical treatment (incision and drainage, in addition to antibiotic therapy) that did not involve aggressive debridement.
Martins, Nicole; Wilson, Barbara J.
A survey was conducted with over 500 children in grades K-5 to examine whether exposure to socially aggressive content was related to children's use of social aggression. The results of the survey revealed a significant relationship between exposure to televised social aggression and increased social aggression at school, but only for girls and…
Hadley, Jade; Mowbray, Tony; Jacobs, Nicky
Proactive aggression (PA) is goal-directed, hostile social behavior that has been linked to detrimental outcomes. It has been theorized that adolescents who believe aggression is a normal and acceptable social response (approval of aggression) are more likely to show PA. Confidence in one's ability to behave aggressively (self-efficacy about…
Duval, N.; Lunven, C.; O'Brien, D. P.; Grosset, A.; O'Connor, S. E.; Berry, C. N.
1. The antithrombotic action of argatroban, a synthetic thrombin inhibitor, was studied in a canine model of coronary cyclic flow having some of the characteristics of acute unstable angina. Heparin was studied as a reference anticoagulant. 2. Localized endothelial damage was induced in the circumflex coronary artery of anaesthetized open-chest foxhounds and a critical stenosis was applied by use of a Lexan constrictor placed around the artery at the site of endothelial damage. An electro-magnetic flow probe was placed distal to the lesion, and cyclic flow variations (CFVs) were observed, as thrombi formed at the site of the arterial lesion and were dislodged. Test compounds were administered by i.v. infusion commencing 1 h after the appearance of CFVs, and maintained for 1 h. On termination of the treatments, coronary flow was observed for a further 60 min. A series of blood samples were taken at predetermined times throughout each experiment in order to determine the coagulation parameters, thrombin time (TT) activated partial thromboplastin time (aPTT) and for the determination of fibrinopeptide A (FpA) levels before, during and post-treatment. 3. Argatroban and heparin showed antithrombotic effects in this model. Argatroban dose-dependently increased the minimum coronary flow at the nadir of the CFVs from 5.4 +/- 1.7 to 9.1 +/- 2.1 ml min-1 (30 micrograms kg-1 min-1, P = 0.041) and from 2.9 +/- 0.9 to 16.3 +/- 4.5 ml min-1 (100 micrograms kg-1 min-1, P = 0.023, n = 8 dogs at each dose level). Heparin (5 and 15 iu kg-1 min-1) also increased minimum flow, but the increase was not statistically significant at the 5% level, although the P value in animals treated with 15 iu kg-1 min-1 (P = 0.0521, n = 6 dogs) fell just outside this limit. Although neither compound significantly decreased the overall CFV frequency, argatroban (100 micrograms kg-1 min-1) significantly (P < 0.01) decreased the number of large amplitude CFVs (minimum coronary flow < 10 ml min-1) by 63
Stockdale, Laura A; Coyne, Sarah M; Nelson, David A; Padilla-Walker, Laura M
Although there have been hundreds of studies on media violence, few have focused on literature, with none examining novels. Accordingly, the aim of the current study was to examine whether reading physical and relational aggression in books was associated with aggressive behavior in adolescents. Participants consisted of 223 adolescents who completed a variety of measures detailing their media use and aggressive behavior. A non-recursive structural equation model revealed that reading aggression in books was positively associated with aggressive behavior, even after controlling for exposure to aggression in other forms of media. Associations were only found for congruent forms of aggression. Implications regarding books as a form of media are discussed.
Pelka, Matthias; Petschelt, Anselm
A case of a 31-year-old female with aggressive periodontitis over 14 years is presented. From 1993 to 2000, no periodontal therapy occurred; disease development and progression could be reconstructed upon radiographic findings. In 2000, full-mouth disinfection therapy and antibiotic therapy was performed, as well as regenerative surgical treatments. Seven years after surgical treatment, stable periodontal conditions and clear bone regeneration in the surgical areas was evident.
McLemore, Monica R
The June 2005 Clinical Journal of Oncology Nursing editorial titled "Communication: Whose Problem Is It?" (Griffin-Sobel, 2005) was written to begin a dialogue about a phenomenon frequently experienced yet rarely discussed: workplace aggression, also known as disruptive behavior. Prompted by a groundbreaking study published in the American Journal of Nursing by Rosenstein and O'Daniel (2005), the editorial challenged oncology nurses to begin to fix problems of communication. After reflecting on both of the articles and considering my own experience as a nurse manager, clinician, and scholar, I decided to explore the topic as it relates to nurse-to-nurse workplace aggression. The following is a summary of interviews with nurse managers, nurse practitioners, and nurse scientists about root causes and effective strategies to manage these sometimes complicated situations. This article is meant to continue the dialogue about the very sensitive issue. Confidentiality has been maintained, and I welcome your comments.
Cairncross, G.; Swinnen, L.; Bayer, R.; Rosenfeld, S.; Salzman, D.; Paleologos, N.; Kaminer, L.; Forsyth, P.; Stewart, D.; Peterson, K.; Hu, W.; Macdonald, D.; Ramsay, D.; Smith, A.
The objective of this study was to ascertain the duration of tumor control and the toxicities of dose-intense myeloablative chemotherapy for patients with recurrent oligodendrogliomas. Patients with previously irradiated oligodendrogliomas, either pure or mixed, that were contrast enhancing, measurable, and behaving aggressively at recurrence were eligible for this study. Only complete responders or major partial responders (75 % reduction in tumor size) to induction chemotherapy--either intensive-dose procarbazine, lomustine, and vincristine or cisplatin plus etoposide-could receive high-dose thiotepa (300 mg/m2/day for 3 days) followed by hematopoietic reconstitution using either bone marrow or peripheral blood stem cells. Thirty-eight patients began induction chemotherapy and 20 (10 men, 10 women; median age 46 years; median Karnofsky score 80) received high-dose thiotepa. For the high-dose group, the median event-free, progression-free, and overall survival times from recurrence were 17, 20, and 49 months, respectively. Tumor control in excess of 2 years was observed in 6 patients (30%). Four patients (20%) are alive and tumor free 27 to 77 months (median, 42 months) from the start of induction therapy; however, fatal treatment-related toxicities also occurred in 4 patients (20%). Three patients died as a result of a progressive encephalopathy which, in 2 instances, was accompanied by a wasting syndrome; 1 patient died as a consequence of an intracerebral (intratumoral) hemorrhage. Fatal toxicities occurred in patients with pretreatment Karnofsky scores of 60 or 70. High-dose thiotepa to consolidate response was a disappointing treatment strategy for patients with recurrent aggressive oligodendroglial neoplasms, although several patients had durable responses. Moreover, as prescribed, high-dose thiotepa had significant toxic effects in previously irradiated patients, especially those with poorer performance status. PMID:11303620
Bowen, Natasha K; Wretman, Christopher J
Structural equation modeling with latent variables was used to evaluate the direct and mediated effects of a neighborhood risk factor (negative teen behaviors) on the parent-report aggressive behavior of 213 students in grades 3 through 5 attending a school in a low-income, rural community. Contagion and social control hypotheses were examined as well as hypotheses about whether the neighborhood served as a microsystem or exosystem for rural pre-adolescents. Analyses took into account the clustering of students and ordinal nature of the data. Findings suggest that rural neighborhoods may operate as both a microsystem and exosystem for children, with direct contagion effects on their aggressive behaviors as well as indirect social control effects through parenting practices. Direct effects on aggression were also found for parenting practices and child reports of friends' negative behaviors. Pre-adolescence may be a transitional stage, when influences of the neighborhood on child behavior begin to compete with influences of caregivers. Findings can inform the timing and targets of violence prevention in rural communities.
Combination of nitric oxide therapy, anti-oxidative therapy, low level laser therapy, plasma rich platelet therapy and stem cell therapy as a novel therapeutic application to manage the pain and treat many clinical conditions
Halasa, Salaheldin; Dickinson, Eva
From hypertension to diabetes, cancer to HIV, stroke to memory loss and learning disorders to septic shock, male impotence to tuberculosis, there is probably no pathological condition where nitric oxide does not play an important role. Nitric oxide is an analgesic, immune-modulator, vasodilator, anti-apoptotic, growth modulator, angiogenetic, anti-thrombotic, anti-inflammatory and neuro-modulator. Because of the above actions of nitric oxide, many clinical conditions associated with abnormal Nitric oxide (NO) production and bioavailability. Our novel therapeutic approach is to restore the homeostasis of nitric oxide and replace the lost cells by combining nitric oxide therapy, anti-oxidative therapy, low level laser therapy, plasma rich platelet therapy and stem cell therapy.
Coyne, Sarah M; Archer, John; Eslea, Mike
Numerous studies have shown that viewing violence in the media can influence an individual's subsequent aggression, but none have examined the effect of viewing indirect aggression. This study examines the immediate effect of viewing indirect and direct aggression on subsequent indirect aggression among 199 children ages 11 to 14 years. They were shown an indirect, direct, or no-aggression video and their subsequent indirect aggression was measured by negative evaluation of a confederate and responses to a vignette. Participants viewing indirect or direct aggression gave a more negative evaluation of and less money to a confederate than participants viewing no-aggression. Participants viewing indirect aggression gave less money to the confederate than those viewing direct aggression. Participants viewing indirect aggression gave more indirectly aggressive responses to an ambiguous situation and participants viewing direct aggression gave more directly aggressive responses. This study provides the first evidence that viewing indirect aggression in the media can have an immediate impact on subsequent aggression.
Schulman, Sam; Witt, Daniel M.; Vandvik, Per Olav; Fish, Jason; Kovacs, Michael J.; Svensson, Peter J.; Veenstra, David L.; Crowther, Mark; Guyatt, Gordon H.
Background: High-quality anticoagulation management is required to keep these narrow therapeutic index medications as effective and safe as possible. This article focuses on the common important management questions for which, at a minimum, low-quality published evidence is available to guide best practices. Methods: The methods of this guideline follow those described in Methodology for the Development of Antithrombotic Therapy and Prevention of Thrombosis Guidelines: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines in this supplement. Results: Most practical clinical questions regarding the management of anticoagulation, both oral and parenteral, have not been adequately addressed by randomized trials. We found sufficient evidence for summaries of recommendations for 23 questions, of which only two are strong rather than weak recommendations. Strong recommendations include targeting an international normalized ratio of 2.0 to 3.0 for patients on vitamin K antagonist therapy (Grade 1B) and not routinely using pharmacogenetic testing for guiding doses of vitamin K antagonist (Grade 1B). Weak recommendations deal with such issues as loading doses, initiation overlap, monitoring frequency, vitamin K supplementation, patient self-management, weight and renal function adjustment of doses, dosing decision support, drug interactions to avoid, and prevention and management of bleeding complications. We also address anticoagulation management services and intensive patient education. Conclusions: We offer guidance for many common anticoagulation-related management problems. Most anticoagulation management questions have not been adequately studied. PMID:22315259
Giancola, Peter R; Levinson, Cheri A; Corman, Michelle D; Godlaski, Aaron J; Morris, David H; Phillips, Joshua P; Holt, Jerred C D
The purpose of this study was to examine the acute effects of alcohol on aggressive behavior in men and women in a laboratory setting. Participants were 526 (261 men and 265 women) healthy social drinkers between 21 and 35 years of age. They were randomly assigned to either an alcohol or a placebo group. Aggression was measured using a modified version of the Taylor Aggression Paradigm in which electric shocks are received from, and delivered to, a same gender fictitious opponent during a supposed competitive interpersonal task. Aggression was operationalized as the intensity and duration of shocks that participants administered to their "opponent." Overall, men were more aggressive than women. Alcohol increased aggression for both men and women but this effect was stronger for men. This is one of the first laboratory studies to demonstrate that alcohol increases aggression in women.
Itil, T M
In the treatment of violent-aggressive behavior, four major groups of drugs emerged: 1. Major tranquilizers in the treatment of aggressive-violent behavior associated with psychotic syndromes. 2. Anti-epileptic drugs such as diphenylhydantoin and barbiturates in the treatment of aggressive-violent behavior within the epileptic syndrome. 3. Psychostimulants in the treatment of aggressive behavior of adolescents and children within behavior disturbances. 4. Anti-male hormones such as cyproterone acetate in the treatment of violent-aggressive behavior associated with pathological sexual hyperactivity. Whereas each category of drug is predominantly effective in one type of aggressive syndrome, it may also be effective in other conditions as well. Aggression as a result of a personality disorder is most difficult to treat with drugs.
Margolin, Gayla; Ramos, Michelle C.; Timmons, Adela C.; Miller, Kelly F.; Han, Sohyun C.
Children who grow up in aggressive households are at risk of having problems with physiological regulation, but researchers have not investigated physiology as a mechanism in the intergenerational transmission of aggression. In this article, we posit that physiological regulation, particularly during stressful interpersonal interactions, may shed light on sensitivity to conflict, It can also inform our understanding of associations between childhood exposure to aggression in families of origin and aggression against partners in adolescence or adulthood. In support of this model, we highlight findings showing that childhood exposure to family aggression relates to physiological regulation across the life span, and that reactions to physiological stress concurrently relate to aggression against intimate partners. Emerging evidence from research on biological processes during stressful interpersonal interactions raises questions about what is adaptive for individuals from aggressive families, particularly as past family experiences intersect with the challenges of new relationships. PMID:26929773
Sawyer, P N
Since modern vascular surgery started with the discovery of heparin and the development of modern vascular grafts including autogenous saphenous vein, the speciality has been technologically driven. At the outset, vascular surgery depended almost entirely on the development of specialized clamps, instruments, and tools to permit decisive attack on the problems of occlusion. No less important was the development of insight into the basis of atherosclerosis, the discovery that atherogenesis with thrombosis is electrochemically identical to corrosion in pipes and therefore subject to chemical forces, which have not yet been delineated, as well as mechanical forces which have been delineated and permit one to attack the atheroma directly. Thus, classic replumbing techniques including bypass and endarterectomy have long been a part of the fundamental firmament of vascular surgery. Most recently, modern techniques in cleaning out blood vessels, removing occlusive processes, and modern thrombus-dissolving enzymes have all come to the forefront. Frequently multiple techniques are used simultaneously. This article is an attempt to summarize various aspects of this activity and describe several of the patents which have been seminal in the ultimate application of the techniques in both experimental animals and man. This should be the first of a series of efforts to summarize this area. The process of change has never been more kinetic than now.
Gomes, Eva; Campos, Rui; Morais, Renata; Fernandes, Marta
Introdução: A fibrilhação auricular é a arritmia sustentada mais prevalente. Está provada a eficácia da anticoagulação oral na prevenção do acidente vascular cerebral nestes doentes. Contudo, este parece ser um tratamento subutilizado. Objectivos: determinar a prevalência de fibrilhação auricular conhecida numa população dos Cuidados de Saúde Primários; identificar as principais comorbilidades, a terapêutica antitrombótica em curso e avaliar a sua adequação segundo as recomendações da European Society of Cardiology. Material e Métodos: Estudo observacional transversal analítico. População: todos os utentes com idade igual ou superior a 30 anos, inscritos em oito Unidades de Saúde Familiar de Vila Nova de Gaia, com diagnóstico de fibrilhação auricular. Resultados: A prevalência de fibrilhação auricular foi de 1,29% (n = 940), sendo superior no género masculino (p = 0,01) e aumentando com a idade (p < 0,001). As comorbilidades mais frequentes foram a hipertensão arterial (76,4%), a insuficiência cardíaca (32,0%) e a diabetes mellitus (28,2%). Um total de 52% realizava terapêutica anticoagulante, 29% antiagregantes plaquetários e 4% ambas as terapêuticas. Dos utentes com baixo risco trombótico, 63,6% estava a fazer erradamente algum tipo de terapêutica antitrombótica; dos utentes com elevado risco ou doença valvular 56,8% estava adequadamente sob terapêutica anticoagulante. Conclusão: A prevalência de fibrilhação auricular bem como a frequência das principais comorbilidades estão de acordo com a maioria dos estudos. Apesar de a maioria dos doentes se encontrar sob anticoagulação oral, apenas 56,8% dos utentes com fibrilhação auricular fazia terapêutica antitrombótica adequada segundo as recomendações da European Society of Cardiology, verificando-se uma subutilização acentuada deste tratamento.
Fisch, Adam S.; Perry, Christina G.; Stephens, Sarah H.; Horenstein, Richard B.; Shuldiner, Alan R.
Arterial thrombosis is a major component of vascular disease, especially myocardial infarction (MI) and stroke. Current anti-thrombotic therapies such as warfarin and clopidogrel are effective in inhibiting cardiovascular events; however, there is great inter-individual variability in response to these medications. In recent years, it has been recognized that genetic factors play a significant role in drug response, and, subsequently, common variants in genes responsible for metabolism and drug action have been identified. These discoveries along with the new diagnostic targets and therapeutic strategies on the horizon hold promise for more effective individualized anti-coagulation and anti-platelet therapy. PMID:23797323
González Bárcenas, Martha L; Pérez Aisa, Ángeles
The development of novel antithrombotic therapy in the past few years and its prescription in patients with cardiovascular and circulatory disease has widened the spectrum of drugs that need to be considered when performing an endoscopic procedure. The balance between the thrombotic risk patients carry due to their medical history and the bleeding risk involved in endoscopic procedures should be thoroughly analyzed by Gastroenterologists. New oral anticoagulants (NOACs) impose an additional task. These agents, that specifically target factor IIa or Xa, do not dispose of an anticoagulation monitoring method nor have an antidote to revert their effect, just as with antiplatelet agents. Understanding the fundamental aspects of these drugs provides the necessary knowledge to determine the ideal period the antithrombotic therapy should be interrupted in order to perform the endoscopic procedure, offering maximum safety for patients and optimal results.
Fang, Xiang; Fang, Ying; Liu, Li; Liu, Guangjian; Wu, Jianhua
Binding of platelet receptor glycoprotein Ibα (GPIbα) to the A1 domain of von Willebrand factor (vWF) is a critical step in both physiologic hemostasis and pathologic thrombosis, for initiating platelet adhesion to subendothelium of blood vessels at sites of vascular injury. Gain-of-function mutations in GPIbα contribute to an abnormally high-affinity binding of platelets to vWF and can lead to thrombosis, an accurate complication causing heart attack and stroke. Of various antithrombotic monoclonal antibodies (mAbs) targeting human GPIbα, 6B4 is a potent one to inhibit the interaction between GPIbα and vWF-A1 under static and flow conditions. Mapping paratope to epitope with mutagenesis experiments, a traditional route in researches of these antithrombotic mAbs, is usually expensive and time-consuming. Here, we suggested a novel computational procedure, which combines with homology modeling, rigid body docking, free and steered molecular dynamics (MD) simulations, to identify key paratope residues on 6B4 and their partners on GPIbα, with hypothesis that the stable hydrogen bonds and salt bridges are the important linkers between paratope and epitope residues. Based on a best constructed model of 6B4 bound with GPIbα, the survival ratios and rupture times of all detected hydrogen bonds and salt bridges in binding site were examined via free and steered MD simulations and regarded as indices of thermal and mechanical stabilizations of the bonds, respectively. Five principal paratope residues with their partners were predicted with their high survival ratios and/or long rupture times of involved hydrogen bonds, or with their hydrogen bond stabilization indices ranked in top 5. Exciting, the present results were in good agreement with previous mutagenesis experiment data, meaning a wide application prospect of our novel computational procedure on researches of molecular of basis of ligand-receptor interactions, various antithrombotic mAbs and other antibodies
Dub, Abdallah M; Dugani, Aisha M
The incidence of thromboembolic diseases is increasing, and they are a major cause of mortality and morbidity worldwide. Mediterranean diet is known for its high content of olive products, especially olive oil, which has known cardiovascular health benefits, including those on blood pressure, cholesterol level, and thrombogenesis. All previous animal and clinical studies investigating the beneficial antithrombotic effects of olives have focused on olive oil and a few on olive leaves (OLEs). In this study, the ethanolic extract of OLE was evaluated for its antithrombotic activity in the rabbit model of thrombosis induced by ligature of the vena cava and intravenous administration of tissue thromboplastin. Pre-treatment with 100 or 200 mg/kg per day of the ethanolic extract for 8 weeks significantly prolonged the prothrombin time (PT) in comparison to the control group (12.10 ± 0.35 sec and 14.38 ± 0.29 sec vs. 10.8 ± 0.32 sec, p < 0.05 and 0.001, respectively). In comparison to the control group, the same doses had no statistically significant effect on thrombus weight (16.85 ± 0.67 mg, 16.32 ± 0.35 mg, and 17.81 ± 0.75 mg; p = 0.18 and 0.06) or on activated partial thromboplastin time (APTT) (19.17 ± 0.33 sec, 19.12 ± 0.73 sec, and 18.97 ± 0.41 sec; p = 0.36 and 0.43, respectively). One important finding in this study concerns thrombus morphology. In the extract treatment groups, the thrombus was filament-like and did not adhere to blood vessel walls, whereas in the control group the thrombus was thick and almost completely occluded the vein. Therefore, these results suggest that OLE ethanolic extract can modify the extrinsic coagulation pathway as evidenced by the prolongation of PT and changes in thrombus morphology, enough to justify further research to evaluate its possible antithrombotic effects.
The process of group therapy with five aggressive young boys, utilizing bibliotherapy as its primary mode of intervention, was investigated and is illustrated in this paper. The rationale for using affective bibliotherapy in a group context is given, the content of the program is described, and the process is fully displayed. The effectiveness of the treatment was studied in a single-subject design, comparing treatment children with their matched counterparts. Results pointed to reduced aggression of all the five treatment students, compared with no change in the control children, by self- and teacher report. In addition, results based on an analysis of transcripts showed increased constructive behavior in group for all participants. Although these results should not be generalized, they suggest an interesting line of research for future investigation.
Abou Al-Shaar, Hussam; Almefty, Kaith K; Abolfotoh, Mohammad; Arvold, Nils D; Devlin, Phillip M; Reardon, David A; Loeffler, Jay S; Al-Mefty, Ossama
Recurrent aggressive falcine meningiomas are uncommon tumors that recur despite receiving extensive surgery and radiation therapy (RT). We have utilized brachytherapy as a salvage treatment in two such patients with a unique implantation technique. Both patients had recurrence of WHO Grade II falcine meningiomas despite multiple prior surgical and RT treatments. Radioactive I-125 seeds were made into strands and sutured into a mesh implant, with 1 cm spacing, in a size appropriate to cover the cavity and region of susceptible falcine dura. Following resection the vicryl mesh was implanted and fixed to the margins of the falx. Implantation in this interhemispheric space provides good dose conformality with targeting of at-risk tissue and minimal radiation exposure to normal neural tissues. The patients are recurrence free 31 and 10 months after brachytherapy treatment. Brachytherapy was an effective salvage treatment for the recurrent aggressive falcine meningiomas in our two patients.
Rituximab Maintenance Therapy After Autologous Stem-Cell Transplantation in Patients With Relapsed CD20+ Diffuse Large B-Cell Lymphoma: Final Analysis of the Collaborative Trial in Relapsed Aggressive Lymphoma
Gisselbrecht, Christian; Schmitz, Norbert; Mounier, Nicolas; Singh Gill, Devinder; Linch, David C.; Trneny, Marek; Bosly, Andre; Milpied, Noel J.; Radford, John; Ketterer, Nicolas; Shpilberg, Ofer; Dührsen, Ulrich; Hagberg, Hans; Ma, David D.; Viardot, Andreas; Lowenthal, Ray; Brière, Josette; Salles, Gilles; Moskowitz, Craig H.; Glass, Bertram
Purpose The standard treatment for relapsed diffuse large B-cell lymphoma (DLBCL) is salvage chemotherapy followed by high-dose therapy and autologous stem-cell transplantation (ASCT). The impact of maintenance rituximab after ASCT is not known. Patients and Methods In total, 477 patients with CD20+ DLBCL who were in their first relapse or refractory to initial therapy were randomly assigned to one of two salvage regimens. After three cycles of salvage chemotherapy, the responding patients received high-dose chemotherapy followed by ASCT. Then, 242 patients were randomly assigned to either rituximab every 2 months for 1 year or observation. Results After ASCT, 122 patients received rituximab, and 120 patients were observed only. The median follow-up time was 44 months. The 4-year event-free survival (EFS) rates after ASCT were 52% and 53% for the rituximab and observation groups, respectively (P = .7). Treatment with rituximab was associated with a 15% attributable risk of serious adverse events after day 100, with more deaths (six deaths v three deaths in the observation arm). Several factors affected EFS after ASCT (P < .05), including relapsed disease within 12 months (EFS: 46% v 56% for relapsed disease after 12 months), secondary age-adjusted International Prognostic Index (saaIPI) more than 1 (EFS: 37% v 61% for saaIPI < 1), and prior treatment with rituximab (EFS: 47% v 59% for no prior rituximab). A significant difference in EFS between women (63%) and men (46%) was also observed in the rituximab group. In the Cox model for maintenance, the saaIPI was a significant prognostic factor (P < .001), as was male sex (P = .01). Conclusion In relapsed DLBCL, we observed no difference between the control group and the rituximab maintenance group and do not recommend rituximab after ASCT. PMID:23091101
Newberry, Michelle; Williams, Nikki; Caulfield, Laura
Research into the relationship between alcohol and aggression has previously focused on men. However, in recent years there has been an increase in binge drinking and violent crime among women, behaviours which have been labelled 'ladette' culture in the UK. The current study advances the literature in this area by investigating the relationship between alcohol consumption and aggressive behaviour of females in licensed premises, including the type of aggression and motivations for aggressive incidents. Ninety-three female university students completed the Student Alcohol Questionnaire (SAQ; Engs, 2002), the Aggression Questionnaire (Buss & Perry, 1992) and a questionnaire developed to measure self-reported aggressive incidents. Females who had been involved in an aggressive incident reported spending more time on average in licensed premises per week and higher levels of aggression as well as consuming significantly more alcohol on the day of the incident than females who had not been involved in an aggressive incident. Contrary to expectations, however, those who had been involved in an aggressive incident did not report drinking more beer (a male-orientated drink) than those who had not. Verbally aggressive incidents were reported more than physically aggressive incidents, and aggression was commonly motivated by an emotional reaction or to address a grievance. The finding that average alcohol consumption per week was significantly associated with female aggression in licensed premises highlights the importance of developing interventions to reduce alcohol consumption among young females.
Mifune, Nobuhiro; Simunovic, Dora; Yamagishi, Toshio
Using a recently created preemptive strike game (PSG) with 176 participants, we investigated if the motivations of spite and/or fear promotes aggression that requires a small cost to the aggressor and imposes a larger cost on the opponent, and confirmed the earlier finding that fear does but spite does not promote intergroup aggression when the groups are characterized as minimal groups; additionally, the rate of intergroup aggression did not vary according to the group membership of the opponent. The PSG represents a situation in which both the motivations of spite and of fear can logically drive players to choose an option of aggression against an opponent. Participants decide whether or not to attack another participant, who also has the same capability. The decision is made in real time, using a computer. We discuss theoretical implications of our findings on the evolutionary foundations of intragroup cooperation and intergroup aggression. The evolutionary model of intergroup aggression, or the parochial altruism model, posits that intragroup cooperation and intergroup aggression have co-evolved, and thus it predicts both intragroup cooperation and intergroup aggression to emerge even in a minimal group devoid of a history of intergroup relationships. The finding that only intragroup cooperation but not intergroup aggression emerged in the minimal group experiments strongly suggests that intergroup aggression involves a psychological mechanism that is independent from that of intragroup cooperation. We further discuss the implications of these findings on real-world politics and military strategy. PMID:28174553
Fuentes, Eduardo; Palomo, Iván
Vascular endothelial contributes to the metabolism and interconversion of extracellular adenine nucleotides via ecto-ATPase/ADPase (CD39) and ecto-5'nucleotidase (CD73) activities. These enzymes collectively dephosphorylate ATP, ADP, and AMP with the production of additional adenosine. In the vascular system, adenine nucleotides (ATP and ADP) and nucleoside adenosine represent an important class of extracellular molecules involved in modulating the processes linked to vascular thrombosis exerting various effects in platelets. Yet, the mechanisms by which the extracellular ATP metabolism in the local environment trigger pro-thrombotic and anti-thrombotic states are yet to be fully elucidated. In this article, the relative contribution of extracellular ATP metabolism in platelet regulation is explored.
Honour, A. J.; Carter, R. D.; Mann, J. I.
The work reported here describes an in vivo study, over several days in each animal, of the formation and behaviour of platelet thrombi in injured living blood vessels in response to topically applied adenosine diphosphate in rabbits which have been treated with oral doses of SH1117 alone or together with acetyl-salicylic (ASA) before and after i.v. injection of alloxan. These two substances SH1117 and ASA when given together display a synergism which is similar to that described for dipyridamole and ASA, but the antithrombotic action of SH1117 and ASA seems to be more profound. It may be of significance that oral SH1117 given alone appears to confer a degree of insensitivity of the injured vessel in its response to ADP, as such an effect is not displayed by dipyridamole. PMID:588441
Schneider, David J; Sobel, Burton E
Platelets are activated in vivo by multiple agonists; however, platelet function testing in vitro has been performed predominantly with only one or two agonists of platelet activation. Greater insight into anticipated effects of antithrombotic regimens should enhance the design of successful clinical trials. To test this concept, we assessed platelet activation induced by multiple agonists and two antithrombotic regimens, unfractionated heparin (UFH) and eptifibatide compared with bivalirudin and cangrelor. Blood samples from 10 patients with coronary artery disease were spiked with pharmacologic concentrations achieved in vivo of either UFH (1.2 U/ml) and eptifibatide (1.7 microg/ml), or with bivalirudin (8 microg/ml) and cangrelor (500 nmol/l). Platelet function was assessed with the use of flow cytometry. Agonists included thrombin (50 nmol/l), adenosine diphosphate (1 micromol/l), the collagen-mimetic convulxin (5 ng/ml), and platelet-activating factor (10 nmol/l). When platelet activation was identified by the surface expression of P-selectin in response to multiple agonists, the combination of bivalirudin and cangrelor suppressed activation more than UFH and eptifibatide. When platelet activation was identified by the activation of glycoprotein IIb-IIIa (PAC-1 binding), the combination of bivalirudin and cangrelor was more effective in suppressing activation in response to thrombin and adenosine diphosphate, whereas UFH and eptifibatide more effectively prevented binding of PAC-1 when platelets were activated with the collagen-mimetic convulxin. In conclusion, bivalirudin and cangrelor suppressed platelet activation in response to diverse agonists in vitro more than UFH and eptifibatide. These results and this approach to selection of promising interventions should be helpful in streamlining the design of clinical trials.
Terry, Christi M.; Zhuplatov, Ilya; He, Yuxia; Wun, Tze-Chein; Kim, Seong-Eun; Cheung, Alfred K.
Background Hemodialysis arteriovenous synthetic grafts (AVG) provide high volumetric blood flow rates shortly after surgical placement. However, stenosis often develops at the vein-graft anastomosis contributing to thrombosis and early graft failure. Two novel fusion proteins, ANV-6L15 and TAP-ANV, inhibit the tissue factor/factor VIIa coagulation complex and the factor Xa/factor Va complex, respectively. Each inhibitor domain is fused to an annexin V domain that targets the inhibitor activity to sites of vascular injury to locally inhibit thrombosis. This study’s objective was to determine if these antithrombotic proteins are safe and effective in inhibiting AVG stenosis. Methods A bolus of either TAP-ANV or ANV-6L15 fusion protein was administered intravenously immediately prior to surgical placement of a synthetic graft between the external jugular vein and common carotid artery in a porcine model. At surgery, the vein and artery were irrigated with the anti-thrombotic fusion protein. Control animals received intravenous heparin. At 4 weeks, MRI was performed to evaluate graft patency, the pigs were then euthanized and grafts and attached vessels were explanted for histomorphometric assessment of neointimal hyperplasia at the vein-graft anastomosis. Blood was collected at surgery, immediately after surgery and at euthanasia for serum metabolic panels and coagulation chemistries. Results No acute thrombosis occurred in the control group or in either experimental group. No abnormal serum chemistries, activated clotting times or PT, PTT values were observed after treatment in experimental or control animals. However, at the vein-graft anastomosis, there was no difference between the control and experimental groups in cross-sectional lumen areas, as measured on MRI, and no difference in hyperplasia areas as determined by histomorphometry. These results suggest that local irrigation of TAP-ANV or ANV-6L15 intra-operatively was as effective in inhibiting acute graft
Wiersema, Arno M.; Vos, Jan-Albert; Bruijninckx, Cornelis M. A.; Delden, Otto M. van; Reijnen, Michel M. P. J.; Vahl, Anco; Zeebregts, Clark J.; Moll, Frans L.
Purpose: The use of prophylactic antithrombotic drugs to prevent arterial thrombosis during the periprocedural period during (percutaneous) peripheral arterial interventions (PAIs) is still a matter of dispute, and clear evidence-based guidelines are lacking. To create those guidelines, a study group was formed in the Netherlands in cooperation with the Dutch Society of Vascular Surgery and the Society of Interventional Radiology. The study group is called 'Consensus on Arterial PeriProcedural Anticoagulation (CAPPA).' Materials and Methods: The CAPPA study group devised and distributed a comprehensive questionnaire amongst Dutch interventional radiologists (IRs). Results: One hundred forty-two IRs responded (68 %) to the questionnaire. Almost no IR stopped acetyl salicylic acid before interventions, and 40 % stopped clopidogrel before PAI but not before carotid artery stenting (CAS). A flushing solution on the sideport of the sheath was used routinely by 30 % of IRs in PAI and by 50 % of IRs during CAS. A minority of IRs used a heparinised flushing solution (28 %). Unfractionated heparin was used by 95 % of IRs as bolus; 5000 IU was the most used dosage. Timing of administration varied widely. A majority of IRs (75 %) repeated heparin administration after 1 h. Conclusion: A substantial variety exists amongst IRs in the Netherlands regarding the use of prophylactic periprocedural antithrombotic drugs to prevent arterial thrombosis during PAI. When compared with varying results regarding the use of heparin in the United Kingdom, the variety in the Netherlands showed a different pattern. The proven variety in these countries, and also between these countries, emphasises the need for authoritative studies to develop evidence-based practical guidelines.
Kayser, Matthew S; Mainwaring, Benjamin; Yue, Zhifeng; Sehgal, Amita
Sleep disturbances negatively impact numerous functions and have been linked to aggression and violence. However, a clear effect of sleep deprivation on aggressive behaviors remains unclear. We find that acute sleep deprivation profoundly suppresses aggressive behaviors in the fruit fly, while other social behaviors are unaffected. This suppression is recovered following post-deprivation sleep rebound, and occurs regardless of the approach to achieve sleep loss. Genetic and pharmacologic approaches suggest octopamine signaling transmits changes in aggression upon sleep deprivation, and reduced aggression places sleep-deprived flies at a competitive disadvantage for obtaining a reproductive partner. These findings demonstrate an interaction between two phylogenetically conserved behaviors, and suggest that previous sleep experiences strongly modulate aggression with consequences for reproductive fitness. DOI: http://dx.doi.org/10.7554/eLife.07643.001 PMID:26216041
Giancola, Peter R
The primary goal of this investigation was to determine whether executive functioning (EF) would moderate the alcohol-aggression relation. Participants were 310 (152 men and 158 women) healthy social drinkers between 21 and 35 years of age. EF as well as non-EF skills were measured with 13 validated neuropsychological tests. Following the consumption of either an alcoholic or a placebo beverage, participants were tested on a modified version of the Taylor Aggression Paradigm (S. Taylor, 1967), in which mild electric shocks were received from, and administered to, a fictitious opponent. Aggressive behavior was operationalized as the shock intensities administered to the fictitious opponent. EF was negatively related to aggressive behavior for men, regardless of beverage group, even when controlling for non-EF skills. Furthermore, alcohol increased aggression only for men with lower EF scores. Finally, the mere belief that alcohol was consumed suppressed aggression for women but not for men.
Guo, Xucheng; Egan, Vincent; Zhang, Jianxin
The misperception of aggressive cues is considered a risk factor for inducing adolescent aggression. Poor coping with life stress is also considered a major influence on aggression. The current study examined the relationship between subjective sense of control and adolescent aggression, considering influences upon the perception of these aggressive cues. In Study 1, 60 participants took part in a 2 (sense of control: high sense of control vs. low sense of control) × 2 (aggressive cue: aggressive vs. neutral) between-subjects contextual experiment. The result found that a lower sense of control led to an increase in adolescents' aggression; only in the low-sense-of-control condition did exposure to aggressive cues boost aggression. In Study 2, the catalytic effect of aggressive cues was further explored by an experiment in which 40 adolescents were randomly assigned to a low- or high-sense-of-control condition to test the importance of aggressive cues. The results suggest that adolescents in the low-sense-of-control condition show a higher salience for aggressive cues.
Reynes, E; Lorant, J
The purpose of the present study was to ascertain whether children beginning martial arts training were more aggressive than their peers. 150 8-yr.-old children were administered the Buss-Perry Aggression Questionnaire. Analysis showed that children beginning martial arts training did not score more aggressive than their peers but scored higher on the Anger scale. This difference, however, appeared only in children practicing judo.
Craig, Ian W; Halton, Kelly E
A consideration of the evolutionary, physiological and anthropological aspects of aggression suggests that individual differences in such behaviour will have important genetic as well as environmental underpinning. Surveys of the likely pathways controlling the physiological and neuronal processes involved highlight, as obvious targets to investigate, genes implicated in sexual differentiation, anxiety, stress response and the serotonin neurotransmitter pathway. To date, however, association studies on single candidates have provided little evidence for any such loci with a major effect size. This may be because genes do not operate independently, but function against a background in which other genetic and environmental factors are crucial. Indeed, a series of recent studies, particularly concentrating on the serotonin and norepinephrine metabolising enzyme, monoamine oxidase A, has emphasised the necessity of examining gene by environmental interactions if the contributions of individual loci are to be understood. These findings will have major significance for the interpretation and analysis of data from detailed whole genome association studies. Functional imaging studies of genetic variants affecting serotonin pathways have also provided valuable insights into potential links between genes, brain and aggressive behaviour.
Seymour, Tracy; Nowak, Anna; Kakulas, Foteini
Glioblastoma (GBM) is the most common and fatal type of primary brain tumor. Gliosarcoma (GSM) is a rarer and more aggressive variant of GBM that has recently been considered a potentially different disease. Current clinical treatment for both GBM and GSM includes maximal surgical resection followed by post-operative radiotherapy and concomitant and adjuvant chemotherapy. Despite recent advances in treating other solid tumors, treatment for GBM and GSM still remains palliative, with a very poor prognosis and a median survival rate of 12–15 months. Treatment failure is a result of a number of causes, including resistance to radiotherapy and chemotherapy. Recent research has applied the cancer stem cells theory of carcinogenesis to these tumors, suggesting the existence of a small subpopulation of glioma stem-like cells (GSCs) within these tumors. GSCs are thought to contribute to tumor progression, treatment resistance, and tumor recapitulation post-treatment and have become the focus of novel therapy strategies. Their isolation and investigation suggest that GSCs share critical signaling pathways with normal embryonic and somatic stem cells, but with distinct alterations. Research must focus on identifying these variations as they may present novel therapeutic targets. Targeting pluripotency transcription factors, SOX2, OCT4, and Nanog homeobox, demonstrates promising therapeutic potential that if applied in isolation or together with current treatments may improve overall survival, reduce tumor relapse, and achieve a cure for these patients. PMID:26258069
Quality of life-adjusted survival analysis of high-dose therapy with autologous bone marrow transplantation versus sequential chemotherapy for patients with aggressive lymphoma in first complete remission. Groupe d'Etude les Lymphomes de l'Adulte (GELA).
Mounier, N; Haioun, C; Cole, B F; Gisselbrecht, C; Sebban, C; Morel, P; Marit, G; Bouabdallah, R; Ravoet, C; Salles, G; Reyes, F; Lepage, E
Evaluating high-dose therapy (HDT) with autologous stem cell transplantation (ASCT) in term of both duration and quality of life (QOL) presents major interests for patients with non-Hodgkin lymphoma. The quality-adjusted time without symptom and toxicity (Q-TWiST) methodology was applied to the LNH87-2 trial comparing HDT with ASCT versus sequential chemotherapy in 541 patients in first complete remission (CR). Overall survival (OS) and disease-free survival (DFS) curves were used to estimate duration of 4 health states: acute short-term toxicity (Tox1), secondary toxicity (Tox2), time without symptom and toxicity (TWiST), and relapse (Rel). Areas under survival curves (AUC) were retrospectively weighted according to QOL coefficients. HDT increased, but not significantly, TWiST (+2. 4 months in AUC, P =.17) and decreased Rel (-3 months, P <.01). Survival estimates did not differ between the 2 treatments (AUC 47.7 months for OS, 39.7 months for DFS). High-risk patients treated by HDT versus chemotherapy had a significant benefit in DFS (AUC 28.8 versus 24.9 months, P <.01) but not in OS (AUC 37.3 versus 36 months, P =.27). Sensitivity analysis, performed by varying QOL coefficients, demonstrated significant quality-adjusted survival gain in high-risk patients treated by HDT. In low-risk patients, a diagram provided an aid to clinical decision-making. This analysis supports the use of HDT in these patients with adverse prognostic factors in the first CR, even after adjusting for QOL using the Q-TWiST method. (Blood. 2000;95:3687-3692)
Cardwell, Michael Steven
Transmission of aggressive behaviors to children through modeling by adults has long been a commonly held psychological concept; however, with the advent of technological innovations during the last 30 years, video media-television, movies, video games, and the Internet-has become the primary model for transmitting aggressiveness to children. This review explores the acquisition of aggressive behaviors by children through modeling behaviors in violent video media. The impact of aggressive behaviors on the child, the family, and society is addressed. Suggestive action plans to curb this societal ill are presented.
Weckerly, Floyd W.; Ricca, Mark A.
Female caribou (Rangifer tarandus) are highly gregarious, yet there has been little study of the behavioral mechanisms that foster coexistence. Quantifying patterns of aggression between male and female, particularly in the only cervid taxa where both sexes grow antlers, should provide insight into these mechanisms. We asked if patterns of aggression by male and female caribou followed the pattern typically noted in other polygynous cervids, in which males display higher frequencies and intensity of aggression. From June to August in 2011 and 2012, we measured the frequency and intensity of aggression across a range of group sizes through focal animal sampling of 170 caribou (64 males and 106 females) on Adak Island in the Aleutian Archipelago, Alaska. Males in same-sex and mixed-sex groups and females in mixed-sex groups had higher frequencies of aggression than females in same-sex groups. Group size did not influence frequency of aggression. Males displayed more intense aggression than females. Frequent aggression in mixed-sex groups probably reflects lower tolerance of males for animals in close proximity. Female caribou were less aggressive and more gregarious than males, as in other polygynous cervid species.
LeBlanc, Manon Mireille; Barling, Julian; Turner, Nick
Using conservation of resources theory, we examined the relationship between intimate partner aggression enacted against heterosexual women and 3 types of work-related outcomes for these women: withdrawal while at work (i.e., cognitive distraction, work neglect), withdrawal from work (i.e., partial absenteeism, intentions to quit), and performance. In Study 1, we compared withdrawal both at and from work across 3 clinically categorized groups of women (n = 50), showing that experiencing physical aggression is related to higher work neglect. We replicated and extended these findings in Study 2 using a community sample of employed women (n = 249) by considering the incremental variance explained by both physical aggression and psychological aggression on these same outcomes. Results showed that physical aggression predicted higher levels of withdrawal both at and from work, with psychological aggression predicting additional variance in partial absenteeism over and above the effects of physical aggression. Study 3 extended the model to include academic performance as an outcome in a sample of female college students (n = 122) in dating relationships. Controlling for the women's conscientiousness, psychological aggression predicted lower academic performance after accounting for the effects of physical aggression. We discuss theoretical and practical implications of these results, as well as directions for future research.
The present study enriches our knowledge on the relationship between security personnel and situational cues that may provoke aggression, such as arms and uniforms. The study examined 259 security personnel who completed an aggression questionnaire (AGQ). The study aimed (a) to compare the tendency toward aggression of security personnel who carry or do not carry arms and/or wear a uniform and (b) to compare the tendency toward aggression of men and women security personnel who carry or do not carry arms and/or wear a uniform. The findings indicated no main effect for aggression cueing classification. However, uniformed men had higher scores of physical aggression than women, and women scored significantly higher on anger than men when not carrying any aggressive cues. The findings also revealed that in general, men security personnel reported much higher physical aggression than women, while women showed slightly higher means of verbal aggression than men. The findings are discussed in light of the gender theory and research.
Kim, Hyoun K.; Laurent, Heidemarie K.; Capaldi, Deborah M.; Feingold, Alan
The present study examined the longitudinal course of men’s physical and psychological aggression toward a partner across 10 years, using a community sample of young couples (N = 194) from at-risk backgrounds. Findings indicated that men’s aggression decreased over time and that women’s antisocial behavior and depressive symptoms predicted changes in men’s aggression. This suggests the importance of studying social processes within the dyad to have a better understanding of men’s aggression toward a partner. PMID:19122790
In this review, the author theoretically and empirically examined motives and interpersonal functions of aggression. A factor-analysis of Averill's questionnaire items on anger revealed that motives involved in aggressive responses were clustered into two groups: the hostile and the instrumental. It was also clarified that an individual is likely to engage in aggression particularly when some hostile motives are evoked. Concerning the interpersonal functions, the author proposed that aggression might serve four principal goals. (1) Aggression can be generated as an avoidance response to an aversive stimulus, such as frustration, annoyance, or pain, and so on. It depends on the severity of the stimulus. It was however emphasized that aggression is also mediated by social cognition, such as an attribution of intent to a harm-doer. (2) Aggression can be used as a means of coercing the other person into doing something. An individual is likely to use such a power strategy if he/she is lacking in self-confidence or a perspective for influencing the target person by more peaceful strategies. (3) Aggression can be interpreted as a punishment when it is directed toward a transgressor. In this case, aggression is motivated by restoration of a social justice, and thus its intensity is determined by the perceived moral responsibility of the transgressor. Further, it was indicated that aggression is intensified if it is justified as a sanctional conduct against the immoral. (4) Aggression can be also evoked when an individual's social identity is threatened. It was suggested that impression management motives are involved in aggression by an unexpected finding that the presence of audience or the identifiability rather facilitated retaliative aggression. The aggression-inhibition effect of apology was also explained in terms of impression management. In conclusion, it was presented that aggression is a behavioral strategy as an attempt to resolve interpersonal conflicts
Coyne, Sarah M
Most researchers on media and aggression have examined the behavioral effects of viewing physical aggression in the media. Conversely, in the current study, I examined longitudinal associations between viewing relational aggression on TV and subsequent aggressive behavior. Participants included 467 adolescents who completed a number of different questionnaires involving media and aggression at 3 different time points. Results revealed that viewing relational aggression on TV was longitudinally associated with future relational aggression. However, early levels of relational aggression did not predict future exposure to televised relational aggression. Conversely, there was a bidirectional relationship between TV violence and physical aggression over time. No longitudinal evidence was found for a general effect of viewing TV, as all significant media effects were specific to the type of aggression viewed. These results support the general aggression model and suggest that viewing relational aggression in the media can have a long-term effect on aggressive behavior during adolescence.
Palejwala, Sheri K.; Zangeneh, Tirdad T.; Goldstein, Stephen A.; Lemole, G. Michael
Background: Rhinocerebral mucormycosis occurs in immunocompromised hosts with uncontrolled diabetes, solid organ transplants, and hematologic malignancies. Primary disease is in the paranasal sinuses but often progresses intracranially, via direct extension or angioinvasion. Rhinocerebral mucormycosis is rapidly fatal with a mortality rate of 85%, even when maximally treated with surgical debridement, antifungal therapy, and correction of underlying processes. Methods: We performed a retrospective chart review of patients with rhinocerebral mucormycosis from 2011 to 2014. These patients were analyzed for symptoms, surgical and medical management, and outcome. We found four patients who were diagnosed with rhinocerebral mucormycosis. All patients underwent rapid aggressive surgical debridement and were started on antifungal therapy on the day of diagnosis. Overall, we observed a mortality rate of 50%. Results: An early aggressive multidisciplinary approach with surgical debridement, antifungal therapy, and correction of underlying disease have been shown to improve survivability in rhinocerebral mucormycosis. Conclusion: A multidisciplinary approach to rhinocerebral mucormycosis with otolaryngology, neurosurgery, and ophthalmology, infectious disease and medical intensivists can help reduce mortality in an otherwise largely fatal disease. Even despite these measures, outcomes remain poor, and a high index of suspicion must be maintained in at-risk populations, in order to rapidly execute a multifaceted approach. PMID:27280057
Glazer, Evan S.; Bartels, Peter H.; Prasad, Anil R.; Yozwiak, Michael L.; Bartels, Hubert G.; Einspahr, Janine G.; Alberts, David S.; Krouse, Robert S.
By identifying aggressive cutaneous squamous cell carcinoma (cSCC) in patients who are at high risk for recurrences or second primaries after resection, intensive surveillance and therapy may decrease morbidity and mortality. We investigated the role of nuclear morphometry (karyometry) in differentiating between aggressive and nonaggressive cSCC. We retrospectively analyzed cSCC lesions from 40 male patients. 22 patients had evidence of aggressive cSCC (local/regional recurrence or a second primary cSCC), and 18 patients were identified with similar ages and sites of disease as control patients with nonaggressive cSCC (no evidence of recurrence, metastasis, or second primary). We performed karyometric analysis to identify nuclear features that discriminate between aggressive and nonaggressive cSCC nuclei. We used statistically significant differences (Kruskal-Wallis test P < 0.0001) to compose a quantitative aggressive classification score (proportion of aggressive nuclei from 0% to 100%). For comparisons, we used Fisher’s exact test or Student t test. The mean age was 79 ± 7 years for aggressive cSCC and 80 ± 9 years for nonaggressive cSCC (P = 0.66). We analyzed a mean of 96 nuclei in each group. The mean classification score for aggressive cSCC was significantly higher (69% ± 6%) than for nonaggressive cSCC (28% ± 5%, P = 0.00002). Overall, the classification score accurately categorized 80% of our patients (P = 0.0004). In most patients, karyometry differentiated between aggressive and nonaggressive cSCC. We found that classification scores, which provide information on individual lesions, could be used for risk stratification. PMID:21636541
Cruz, Aurora S; Benkers, Tara; Rostad, Steven; Broyles, Frances Broyles; Yuen, Kevin; Mayberg, Marc
Most prolactin-secreting pituitary adenomas demonstrate slow growth and are effectively managed with medical/surgical therapy. Rarely, these tumors can behave aggressively with rapid growth and invasion of local tissues, and are refractory to medical, surgical, or radio-surgical therapies. We report a case of a prolactin-secreting adenoma in a young woman, which became progressively aggressive and refractory to usual treatment modalities, but responded to treatment with the chemotherapeutic agent temozolomide. In addition, we review the literature for treatment of refractory adenomas with temozolomide. The clinical and pathologic characteristics of aggressive prolactin-secreting adenomas are reviewed, as well as their response to dopamine agonists, surgery, radiotherapy, and chemotherapy. PMID:27489751
With 338 fifth-grade students as subjects, this study found the variations in the relation between school bullying and social preference as a function of gender and types of aggressive behavior utilized. Aggressive boys were likely to be rejected by peers, whereas aggressive girls were both rejected and accepted by peers. Children nominated…
Grumm, Mandy; Hein, Sascha; Fingerle, Michael
Aggressive behavior between children in schools is a topic that receives much interest as violence and aggressive behavior cause many maladaptive social outcomes in the school setting. In the current study the Implicit Association Test (IAT) was adapted as a measure of children's implicit aggression, by assessing the association of the self…
Coyne, Sarah M; Nelson, David A; Graham-Kevan, Nicola; Tew, Emily; Meng, K Nathan; Olsen, Joseph A
Various studies have found that viewing physical or relational aggression in the media can impact subsequent engagement in aggressive behavior. However, this has rarely been examined in the context of relationships. Accordingly, the aim of this study was to examine the connection between viewing various types of aggression in the media and perpetration of aggression against a romantic partner. A total of 369 young adults completed a variety of questionnaires asking for their perpetration of various forms of relationship aggression. Participants' exposure to both physical and relational aggression in the media was also assessed. As a whole, we found a relationship between viewing aggression in the media and perpetration of aggression; however, this depended on the sex of the participant and the type of aggression measured. Specifically, exposure to physical violence in the media was related to engagement in physical aggression against their partner only for men. However, exposure to relational aggression in the media was related to romantic relational aggression for both men and women.
Crick, Nicki R.; Ostrov, Jamie M.; Werner, Nicole E.
Although great strides have recently been made in our understanding of relational aggression and its consequences, one significant limitation has been the lack of prospective studies. The present research addressed this issue by identifying and assessing groups of relationally aggressive, physically aggressive, relationally plus physically…
Bowker, Julie C.; Ostrov, Jamie M.; Raja, Radhi
This study explored the associations between relational and overt aggression and social status, and tested whether the peer correlates of aggression vary as a function of best friends' aggression during early adolescence in urban India. One hundred and ninety-four young adolescents from primarily middle-to-upper-class families in Surat, India…
Adams, Ryan E.; Bukowski, William M.; Bagwell, Catherine
The effect of friendship reciprocation and friend aggression on the stability of aggression across a 6-month period following the transition to secondary school was studied in a sample of 298 Grade 6 children from a predominately white, middle-class, Midwestern American community. The stability of aggression was generally high but it varied as a…
Anderson, Craig A.; Morrow, Melissa
Extended and tested Deutsch's theory of competition effects. Predicted that people view competitive situations as inherently more aggressive than cooperative ones. Predicted that leading people to think of an aggressive situation in competitive terms would increase aggressive behavior. Increase of kill ratio occurred in absence of changes in…
Huband, Nick; Ferriter, Michael; Nathan, Rajan; Jones, Hannah
Background Aggression is a major public health issue and is integral to several mental health disorders. Antiepileptic drugs may reduce aggression by acting on the central nervous system to reduce neuronal hyper-excitability associated with aggression. Objectives To evaluate the efficacy of antiepileptic drugs in reducing aggression and associated impulsivity. Search methods We searched CENTRAL, MEDLINE, EMBASE, CINAHL, PsycINFO, metaRegister of Controlled Trials (mRCT) and ClinicalTrials.gov to April 2009. We also searched Cochrane Schizophrenia Group’s register of trials on aggression, National Research Record and handsearched for studies. Selection criteria Prospective, placebo-controlled trials of antiepileptic drugs taken regularly by individuals with recurrent aggression to reduce the frequency or intensity of aggressive outbursts. Data collection and analysis Three authors independently selected studies and two authors independently extracted data. We calculated standardised mean differences (SMDs), with odds ratios (ORs) for dichotomous data. Main results Fourteen studies with data from 672 participants met the inclusion criteria. Five different antiepileptic drugs were examined. Sodium valproate/divalproex was superior to placebo for outpatient men with recurrent impulsive aggression, for impulsively aggressive adults with cluster B personality disorders, and for youths with conduct disorder, but not for children and adolescents with pervasive developmental disorder. Carbamazepine was superior to placebo in reducing acts of self-directed aggression in women with borderline personality disorder, but not in children with conduct disorder. Oxcarbazepine was superior to placebo for verbal aggression and aggression against objects in adult outpatients. Phenytoin was superior to placebo on the frequency of aggressive acts in male prisoners and in outpatient men including those with personality disorder, but not on the frequency of ‘behavioral incidents’ in
Hammond, Ryan T.; Nichols, Michael P.
In response to the charge by "collaborative" therapies, such as solution focused and narrative, that structural family therapy is an aggressive, confrontational, and impositional approach, this investigation examines the role of therapist empathy in creating a collaborative partnership in structural family therapy. Twenty-four videotaped therapy…
Veroude, Kim; Zhang-James, Yanli; Fernàndez-Castillo, Noèlia; Bakker, Mireille J; Cormand, Bru; Faraone, Stephen V
The Research Domain Criteria (RDoC) address three types of aggression: frustrative non-reward, defensive aggression and offensive/proactive aggression. This review sought to present the evidence for genetic underpinnings of aggression and to determine to what degree prior studies have examined phenotypes that fit into the RDoC framework. Although the constructs of defensive and offensive aggression have been widely used in the animal genetics literature, the human literature is mostly agnostic with regard to all the RDoC constructs. We know from twin studies that about half the variance in behavior may be explained by genetic risk factors. This is true for both dimensional, trait-like, measures of aggression and categorical definitions of psychopathology. The non-shared environment seems to have a moderate influence with the effects of shared environment being unclear. Human molecular genetic studies of aggression are in an early stage. The most promising candidates are in the dopaminergic and serotonergic systems along with hormonal regulators. Genome-wide association studies have not yet achieved genome-wide significance, but current samples are too small to detect variants having the small effects one would expect for a complex disorder. The strongest molecular evidence for a genetic basis for aggression comes from animal models comparing aggressive and non-aggressive strains or documenting the effects of gene knockouts. Although we have learned much from these prior studies, future studies should improve the measurement of aggression by using a systematic method of measurement such as that proposed by the RDoC initiative.
Krahé, Barbara; Möller, Ingrid; Huesmann, L Rowell; Kirwil, Lucyna; Felber, Juliane; Berger, Anja
This study examined the links between desensitization to violent media stimuli and habitual media violence exposure as a predictor and aggressive cognitions and behavior as outcome variables. Two weeks after completing measures of habitual media violence exposure, trait aggression, trait arousability, and normative beliefs about aggression, undergraduates (N = 303) saw a violent film clip and a sad or a funny comparison clip. Skin conductance level (SCL) was measured continuously, and ratings of anxious and pleasant arousal were obtained after each clip. Following the clips, participants completed a lexical decision task to measure accessibility of aggressive cognitions and a competitive reaction time task to measure aggressive behavior. Habitual media violence exposure correlated negatively with SCL during violent clips and positively with pleasant arousal, response times for aggressive words, and trait aggression, but it was unrelated to anxious arousal and aggressive responding during the reaction time task. In path analyses controlling for trait aggression, normative beliefs, and trait arousability, habitual media violence exposure predicted faster accessibility of aggressive cognitions, partly mediated by higher pleasant arousal. Unprovoked aggression during the reaction time task was predicted by lower anxious arousal. Neither habitual media violence usage nor anxious or pleasant arousal predicted provoked aggression during the laboratory task, and SCL was unrelated to aggressive cognitions and behavior. No relations were found between habitual media violence viewing and arousal in response to the sad and funny film clips, and arousal in response to the sad and funny clips did not predict aggressive cognitions or aggressive behavior on the laboratory task. This suggests that the observed desensitization effects are specific to violent content.
Krahé, Barbara; Möller, Ingrid; Huesmann, L. Rowell; Kirwil, Lucyna; Felber, Juliane; Berger, Anja
This study examined the links between desensitization to violent media stimuli and habitual media violence exposure as a predictor and aggressive cognitions and behavior as outcome variables. Two weeks after completing measures of habitual media violence exposure, trait aggression, trait arousability, and normative beliefs about aggression, undergraduates (N = 303) saw a violent film clip and a sad or a funny comparison clip. Skin conductance level (SCL) was measured continuously, and ratings of anxious and pleasant arousal were obtained after each clip. Following the clips, participants completed a lexical decision task to measure accessibility of aggressive cognitions and a competitive reaction time task to measure aggressive behavior. Habitual media violence exposure correlated negatively with SCL during violent clips and positively with pleasant arousal, response times for aggressive words, and trait aggression, but it was unrelated to anxious arousal and aggressive responding during the reaction time task. In path analyses controlling for trait aggression, normative beliefs, and trait arousability, habitual media violence exposure predicted faster accessibility of aggressive cognitions, partly mediated by higher pleasant arousal. Unprovoked aggression during the reaction time task was predicted by lower anxious arousal. Neither habitual media violence usage nor anxious or pleasant arousal predicted provoked aggression during the laboratory task, and SCL was unrelated to aggressive cognitions and behavior. No relations were found between habitual media violence viewing and arousal in response to the sad and funny film clips, and arousal in response to the sad and funny clips did not predict aggressive cognitions or aggressive behavior on the laboratory task. This suggests that the observed desensitization effects are specific to violent content. PMID:21186935
Brock, Barbara L.
Relational aggression among women presents an overlooked barrier to women's quest for advancement in the workplace. Although research on women's leadership extols their ability to collaborate and form lasting, supportive relationships, one cannot assume that all women are supportive of other women. Research reveals that relational aggression,…
Liu, Jianghong; Lewis, Gary; Evans, Lois
Aggressive behavior is the observable manifestation of aggression and is often associated with developmental transitions and a range of medical and psychiatric diagnoses across the lifespan. As healthcare professionals involved in the medical and psychosocial care of patients from birth through death, nurses frequently encounter—and may serve as—both victims and perpetrators of aggressive behavior in the workplace. While the nursing literature has continually reported research on prevention and treatment approaches, less emphasis has been given to understanding the etiology, including contextual precipitants of aggressive behavior. This paper provides a brief review of the biological, social, and environmental risk factors that purportedly give rise to aggressive behavior. Further, many researchers have focused specifically on aggressive behavior in adolescence and adulthood. Less attention has been given to understanding the etiology of such behavior in young children and older adults. This paper emphasizes the unique risk factors for aggressive behavior across the developmental spectrum, including childhood, adolescence, adulthood, and late life. Appreciation of the risk factors of aggressive behavior, and, in particular, how they relate to age-specific manifestations, can aid nurses in better design and implementation of prevention and treatment programs. PMID:22471771
Goldstein, Arnold P.; And Others
American society is violent, a fact which is well-reflected in schools. This book, designed specifically for school personnel, presents the primary techniques currently being employed by educators to prevent, manage, and replace student aggression. The volume opens with a description of the origins of aggressive behavior and offers some…
Savino, Jacqueline F.; Kostich, Melissa J.
The ruffe, Gymnocephalus cernuus, is a nonindigenous percid in the Great Lakes. Ruffe are aggressive benthivores and forage over soft substrates. Laboratory studies in pools (100 cm in diameter, 15 cm water depth) were conducted to determine whether fish density (low = 2, medium = 4, high = 6 ruffe per pool) changed foraging and aggressive behaviors with a limited food supply of chironomid larvae. All fish densities demonstrated a hierarchy based on aggressive interactions, but ruffe were most aggressive at low and high fish densities. Time spent in foraging was lowest at the low fish density. The best forager at the low fish density was the most aggressive individual, but the second most aggressive fish at the medium and high fish density was the best forager and also the one chased most frequently. A medium fish density offered the best energetic benefits to ruffe by providing the lowest ratio of time spent in aggression to that spent foraging. Based on our results, ruffe should grow best at an intermediate density. With high ruffe densities, we would also expect disparity in size as the more aggressive fish are able to garner a disproportionate amount of the resources. Alternatively, as the Great Lakes are a fairly open system, ruffe could migrate out of one area to colonize another as populations exceed optimal densities.
Highlights a longitudinal study on key factors in the metamorphosis of childhood aggression into adult crime in more than 400 males/females. Results (which began with study of 875 third graders in 1960) indicate that aggressive youngsters at age eight have much higher rates of criminal/violent behavior at age 30. (JN)
Martin, Jacqueline L.; Ross, Hildy S.
Thirty-nine families were observed extensively at home when children were 2 1/2 and 4 1/2 years of age and again 2 years later. The Social Relations Model is used to investigate children's sex differences in aggression and parents' prohibiting aggression during sibling conflict. In the first observation period, boys engaged in more severe and mild…
Haug, Lore I
Aggression toward unfamiliar dogs and people is a common problem arising most commonly from fear and territoriality. A number of factors contribute to its development, including socialization deficits, hormones, and genetic and neurophysiologic components. These factors are discussed in this article, as are management and behavior modification approaches for controlling aggression.
Holt, Wilma J.
This paper reviews three studies which illustrate the use of two different techniques of behavior modification to control aggression in preschool children in classroom situations. The first technique demonstrated the use of "time-out" as a mild punishment procedure. The teacher changed events following aggression by briefly removing the child from…
Watson, Malcolm W.; Fischer, Kurt W.; Andreas, Jasmina Burdzovic; Smith, Kevin W.
In this article, Malcolm Watson, Kurt Fischer, Jasmina Burdzovic Andreas, and Kevin Smith describe and compare two approaches to assessing risk factors that lead to aggression in children. The first, the severe risks approach, focuses on how risk factors form a pathway that leads to aggressive behavior. Within this approach, an inhibited…
Dahlen, Eric R.; Czar, Katherine A.; Prather, Emily; Dyess, Christy
For this study we explored relational aggression and victimization in a college sample (N = 307), examining potential gender and race differences, correlates, and the link between relational aggression and common emotional and behavioral problems, independent of relational victimization. Gender and race differences were observed on relational…
Jones, Marc V; Bray, Steven R; Olivier, Stephen
The present study examined the relationship between aggression and game location in rugby league. We videotaped a random sample of 21 professional rugby league games played in the 2000 Super League season. Trained observers recorded the frequency of aggressive behaviours. Consistent with previous research, which used territoriality theories as a basis for prediction, we hypothesized that the home team would behave more aggressively than the away team. The results showed no significant difference in the frequency of aggressive behaviours exhibited by the home and away teams. However, the away teams engaged in substantially more aggressive behaviours in games they lost compared with games they won. No significant differences in the pattern of aggressive behaviours for home and away teams emerged as a function of game time (i.e. first or second half) or game situation (i.e. when teams were winning, losing or drawing). The findings suggest that while home and away teams do not display different levels of aggression, the cost of behaving aggressively (in terms of game outcome) may be greater for the away team.
Wehby, Joseph H.
This review describes four major hypotheses related to aggressive behavior and reviews current means for assessment. Hypotheses suggest that aggressive behavior is the result of a social skills deficit, positive or negative reinforcement, environmental deficits, or deficits in the cognitive processing of social stimuli. Changes in assessment…
Wheatley, Anna; Murrihy, Rachael; van Kessel, Jacobine; Wuthrich, Viviana; Remond, Louise; Tuqiri, Rebekka; Dadds, Mark; Kidman, Antony
A 16-week, bi-weekly, cognitive behavioural therapy (CBT)-based aggression management training course was conducted with a limited sample of behavioural school students in New South Wales. Attendance, withdrawal and suspension rates over the training period were compared to those of a control period. Parent and teacher feedback, assessed at pre-…
Lemaréchal, Angela; Zundel, Sabine; Szavay, Philipp
Necrotizing fasciitis (NF) is a severe, life-threatening infectious condition. Diagnosis is difficult due to unspecific symptoms yet crucial for favorable outcomes. We report a case of a 1 year old, previously healthy boy, where early suspicion of NF led to prompt aggressive therapy and consecutive restitutio ad integrum. PMID:28035291
Yakovlev, D S; Spasov, A A; Bukatina, T M; Smirnov, A V; Suzdalev, K F
Antithrombotic properties of a new P2Y1 receptor antagonist N-[(1-morpholinopropyl-amino)- carbonyl-2-(1-ethyl-1H-indole-3-yl)-vinyl]-4-methylphenyl-amide hydrochloride, substance Sbt-119, and reference drug ticlopidine were studied on experimental models of arterial and systemic thromboses. Substance Sbt-119 was 39.9% (p<0.05) more potent than ticlopidine in producing the antithrombotic effect. Moreover, substance Sbt-119 was shown to increase the survival rate of animals after systemic treatment with ADP (by 20%, p<0.0001). This substance decreased the number of mural thrombi and reduced the severity of hemodynamics disturbances in the organs during systemic thrombosis.
Kravtsov, M N; Manukovskiĭ, V A; Zharinov, G M; Kandyba, D V; Tsibirov, A A; Savello, A V; Svistov, D V
Today vertebral hemangioma is not completely understood entity, neither its pathogenesis nor optimal treatment is determined. Nowadays in majority of clinics in this country ineffective radiotherapy remains the first-line treatment. We analyzed results of treatment of 205 patients (286 lesions) with aggressive hemangiomas operated in Department of Neurosurgery of Military Medical Academy and Department of Nuclear Medicine of of Russian Scientific Center of Radiological and Surgical Technologies (Saint-Petersburg, Russia) since 1999 till 2009. Percutaneus vertebroplasty was performed in 167 lesions, radiotherapy was applied in 119 aggressive hemangiomas. Vertebroplasty is more effective for treatment of aggressive hemangiomas in comparison with radiotherapy. Signs of hemangiomas aggression, indications for surgery, and tactics of management were determined. Use of percutaneous vertebroplasty for treatment of aggressive hemangiomas resulted in fast recovery of the patients. This procedure is minimally invasive, it reduces hospital stay and duration of recovery.
Vida, Péter; Halász, József; Gádoros, Júlia
Aggressive/attacking and helpful/emphatic/prosocial behaviors are extremely important in human relationships. Both high levels of aggression and deficits of prosociality play important role in the development and conservation of mental disorders. We review the measurement options and clinical importance of aggressive and prosocial behavior. The typical developmental pathways and the genetic and environmental background of these behaviors are presented. The clinical tools used in the measurement of aggression and prosociality are summarized in the present paper, with specific attention on questionnaires applied in Hungarian practice. The connections between diagnostic categories (conduct disorder, oppositional-defiant disorder, attention deficit and hyperactive disorder, autism spectrum disorders) and the two behaviors are evaluated. In the end, we present those additional research projects that explore the cognitive-emotional background of aggressive or prosocial behavior with clinical relevance either in the diagnosis or in the treatment of child psychiatric diseases.
Li, Jian-Bin; Nie, Yan-Gang; Boardley, Ian D; Dou, Kai; Situ, Qiao-Min
I(3) theory assumes that aggressive behavior is dependent on three orthogonal processes (i.e., Instigator, Impellance, and Inhibition). Previous studies showed that Impellance (trait aggressiveness, retaliation tendencies) better predicted aggression when Instigator was strong and Inhibition was weak. In the current study, we predicted that another Impellance (i.e., normative beliefs about aggression) might predict aggression when Instigator was absent and Inhibition was high (i.e., the perfect calm proposition). In two experiments, participants first completed the normative beliefs about aggression questionnaire. Two weeks later, participants' self-control resources were manipulated either using the Stroop task (study 1, N = 148) or through an "e-crossing" task (study 2, N = 180). Afterwards, with or without being provoked, participants played a game with an ostensible partner where they had a chance to aggress against them. Study 1 found that normative beliefs about aggression negatively and significantly predicted aggressive behavior only when provocation was absent and self-control resources were not depleted. In Study 2, normative beliefs about aggression negatively predicted aggressive behavior at marginal significance level only in the "no-provocation and no-depletion" condition. In conclusion, the current study provides partial support for the perfect calm proposition and I(3) theory.
Barry, Tammy D; Thompson, Alice; Barry, Christopher T; Lochman, John E; Adler, Kristy; Hill, Kwoneathia
The present study examined the importance of psychopathy-linked narcissism in predicting proactive and reactive aggression and conduct problems in a group of 160 moderately to highly aggressive children (mean age of 10 years, 9 months). Children's self-report of self-esteem and parent and teacher report of dimensions of psychopathy [narcissism, callous-unemotional (CU) traits, and impulsivity], proactive and reactive aggression, and conduct problems were collected. Composites of parent and teacher ratings of children's behavior were used. Consistent with the study's hypotheses, narcissism predicted unique variance in both proactive and reactive aggression, even when controlling for other dimensions of psychopathy, demographic variables associated with narcissism, and the alternative subtype of aggression. As hypothesized, impulsivity was significantly associated with only reactive aggression. CU traits were not related to proactive or reactive aggression once the control variables were entered. All dimensions of psychopathy predicted unique variance in conduct problems. Consistent with prediction, narcissism was not significantly related to general self-esteem, providing support that narcissism and self-esteem are different constructs. Furthermore, narcissism and self-esteem related differentially to proactive aggression, reactive aggression, and conduct problems. Furthermore, narcissism but not self-esteem accounted for unique variance in aggression and conduct problems. The importance of narcissism in the prediction of aggressive behaviors and clinical implications are discussed.
Strang, Emily; Peterson, Zoë D
Researching the correlates of men's sexually aggressive behavior (i.e., verbal coercion and rape) is critical to both understanding and preventing sexual aggression. This study examined 120 men who completed an anonymous online questionnaire. The study aimed to determine the relative importance of two potential correlates of men's self-reported use of sexual aggression: (a) perceptions that male peers use and support sexual aggression and (b) perceptions of punishment likelihood associated with sexual aggression. Results revealed that perceptions of male friends' acceptance of sexual aggression were strongly associated with individual men's reports of using verbal coercion and rape. Perceptions of punishment likelihood were negatively correlated with verbal coercion but not with rape through intoxication and force. Implications for sexual aggression prevention are discussed.
Thomas, Duane E.; Bierman, Karen L.; Powers, CJ
Research suggests that early classroom experiences influence the socialization of aggression. Tracking changes in the aggressive behavior of 4179 children from kindergarten to second-grade (ages 5–8) this study examined the impact of two important features of the classroom context–aggregate peer aggression and climates characterized by supportive teacher-student interactions. The aggregate aggression scores of children assigned to first-grade classrooms predicted the level of classroom aggression (assessed by teacher ratings) and quality of classroom climate (assessed by observers) that emerged by the end of grade 1. HLM analyses revealed that first-grade classroom aggression and quality of classroom climate made independent contributions to changes in student aggression, as students moved from kindergarten to second grade. Implications for policy and practice are discussed. PMID:21434887
Thomas, Duane E; Bierman, Karen L; Powers, C J
Research suggests that early classroom experiences influence the socialization of aggression. Tracking changes in the aggressive behavior of 4,179 children from kindergarten to second-grade (ages 5-8), this study examined the impact of 2 important features of the classroom context--aggregate peer aggression and climates characterized by supportive teacher-student interactions. The aggregate aggression scores of children assigned to first-grade classrooms predicted the level of classroom aggression (assessed by teacher ratings) and quality of classroom climate (assessed by observers) that emerged by the end of Grade 1. Hierarchical linear model analyses revealed that first-grade classroom aggression and quality of classroom climate made independent contributions to changes in student aggression, as students moved from kindergarten to second grade. Implications for policy and practice are discussed.
Chang, Chu-Hsiang Daisy; Lyons, Brent J
Types of perpetrators of workplace aggression can vary considerably, and recent research has demonstrated that aggression from different perpetrator categories has different implications for victims. We extended research on multifoci aggression and explored affective and cognitive pathways linking verbal aggression from four perpetrator types--supervisors, coworkers, customers, and significant others--and employee morale and turnover intention. Data from a sample of 446 working adults indicated that both emotional strain and employees' corresponding judgments of their social exchange relationships with these perpetrators served as the mechanisms for the association between aggression from supervisors, coworkers, and customers and morale and turnover intention. Coworker aggression had a direct association with turnover intention and significant other aggression was related to turnover intention only through emotional strain. The theoretical and practical implications of these findings are discussed.
Renwick, Laoise; Stewart, Duncan; Richardson, Michelle; Lavelle, Mary; James, Karen; Hardy, Claire; Price, Owen; Bowers, Len
Aggression and violence are widespread in UK Mental Health Trusts, and are accompanied by negative psychological and physiological consequences for both staff and other patients. Patients who are younger, male, and have a history of substance use and psychosis diagnoses are more likely to display aggression; however, patient factors are not solely responsible for violence, and there are complex circumstances that lead to aggression. Indeed, patient-staff interactions lead to a sizeable portion of aggression and violence on inpatient units, thus they cannot be viewed without considering other forms of conflict and containment that occur before, during, and after the aggressive incident. For this reason, we examined sequences of aggressive incidents in conjunction with other conflict and containment methods used to explore whether there were particular profiles to aggressive incidents. In the present study, 522 adult psychiatric inpatients from 84 acute wards were recruited, and there were 1422 incidents of aggression (verbal, physical against objects, and physical). Cluster analysis revealed that aggressive incident sequences could be classified into four separate groups: solo aggression, aggression-rule breaking, aggression-medication, and aggression-containment. Contrary to our expectations, we did not find physical aggression dominant in the aggression-containment cluster, and while verbal aggression occurred primarily in solo aggression, physical aggression also occurred here. This indicates that the management of aggression is variable, and although some patient factors are linked with different clusters, these do not entirely explain the variation.
Brugman, Suzanne; Lobbestael, Jill; Arntz, Arnoud; Cima, Maaike; Schuhmann, Teresa; Dambacher, Franziska; Sack, Alexander T
The aim of this study was to identify implicit cognitive predictors of aggressive behavior. Specifically, the predictive value of an attentional bias for aggressive stimuli and automatic association of the self and aggression was examined for reactive and proactive aggressive behavior in a non-clinical sample (N = 90). An Emotional Stroop Task was used to measure an attentional bias. With an idiographic Single-Target Implicit Association Test, automatic associations were assessed between words referring to the self (e.g., the participants' name) and words referring to aggression (e.g., fighting). The Taylor Aggression Paradigm (TAP) was used to measure reactive and proactive aggressive behavior. Furthermore, self-reported aggressiveness was assessed with the Reactive Proactive Aggression Questionnaire (RPQ). Results showed that heightened attentional interference for aggressive words significantly predicted more reactive aggression, while lower attentional bias towards aggressive words predicted higher levels of proactive aggression. A stronger self-aggression association resulted in more proactive aggression, but not reactive aggression. Self-reports on aggression did not additionally predict behavioral aggression. This implies that the cognitive tests employed in our study have the potential to discriminate between reactive and proactive aggression. Aggr. Behav. 9999:XX-XX, 2014. © 2014 Wiley Periodicals, Inc.
Brugman, Suzanne; Lobbestael, Jill; Arntz, Arnoud; Cima, Maaike; Schuhmann, Teresa; Dambacher, Franziska; Sack, Alexander T
The aim of this study was to identify implicit cognitive predictors of aggressive behavior. Specifically, the predictive value of an attentional bias for aggressive stimuli and automatic association of the self and aggression was examined for reactive and proactive aggressive behavior in a non-clinical sample (N = 90). An Emotional Stroop Task was used to measure an attentional bias. With an idiographic Single-Target Implicit Association Test, automatic associations were assessed between words referring to the self (e.g., the participants' name) and words referring to aggression (e.g., fighting). The Taylor Aggression Paradigm (TAP) was used to measure reactive and proactive aggressive behavior. Furthermore, self-reported aggressiveness was assessed with the Reactive Proactive Aggression Questionnaire (RPQ). Results showed that heightened attentional interference for aggressive words significantly predicted more reactive aggression, while lower attentional bias towards aggressive words predicted higher levels of proactive aggression. A stronger self-aggression association resulted in more proactive aggression, but not reactive aggression. Self-reports on aggression did not additionally predict behavioral aggression. This implies that the cognitive tests employed in our study have the potential to discriminate between reactive and proactive aggression. Aggr. Behav. 41:51-64 2015. © 2014 Wiley Periodicals, Inc.
Knox, Michele; Carey, Michael; Kim, Wun Jung
Examined differences in aggressive behavior among predominantly white adolescent inpatients with and without depression. Survey data indicated that depression and gender interacted significantly. Depressed females demonstrated more physical aggression than nondepressed females, and depressed males demonstrated less aggression than nondepressed…
Fichter, Andreas M.; Ritschl, Lucas M.; Robitzky, Luisa K.; Wagenpfeil, Stefan; Mitchell, David A.; Wolff, Klaus-Dietrich; Mücke, Thomas
The effects of antithrombotic drugs on random and free flap survival have been investigated in the past, but the experimental and clinical results are not in agreement. A perforator-based critical ischaemia model was used to evaluate the effects of different perioperatively administered pharmaceutical agents on tissue ischaemia and to assess the potential additional haemorheological or vasodilative effects of antithrombotics on flap microcirculation. Combined laser Doppler flowmetry and remission spectroscopy revealed an increase in certain microcirculation parameters in most groups in comparison with saline controls, and these changes correlated with flap survival. Clopidogrel and hirudin significantly improved the amount of viable flap tissue in comparison with controls, while unfractioned heparin had a negative effect on flap survival. Low molecular weight heparin, aspirin, pentoxifylline, and hydroxyethyl starch had no impact on the amount of viable flap tissue. A higher complication rate was observed in all experimental groups, but only clopidogrel had a negative impact on the flap viability. Our results add to the body of evidence supporting the conclusion that perioperative antithrombotic treatment improves flap survival. Clopidogrel and hirudin are effective pharmacological agents that significantly increased the viability of perforator-based skin flaps in rats, but at a higher risk of postoperative bleeding. PMID:27767060
Wei, Xuetuan; Luo, Mingfang; Liu, Huizhou
The bifunctional coating with antithrombotic and antimicrobial activity was developed using nattokinase (NK) and nanosilver (AgNPs). Firstly, the adsorption interactions between NK and AgNPs were confirmed, and the composite particles of NK-AgNPs were prepared by adsorption of NK with AgNPs. At 5FU/mL of NK concentration, the saturation adsorption capacity reached 24.35 FU/mg AgNPs with a high activity recovery of 97%, and adsorption by AgNPs also enhanced the heat stability and anticoagulant effect of NK. Based on the electrostatic force driven layer-by-layer self-assembly, the NK-AgNPs were further assembled with polyethylenimine (PEI) to form coating. UV-vis analysis showed that the self-assembly process was regular, and atom force microscopy analysis indicated that NK-AgNPs were uniformly embedded into the coating. The NK-AgNPs-PEI composite coating showed potent antithrombotic activity and antibacterial activity. This study developed a novel strategy to construct the bifunctional coating with antithrombotic and antimicrobial properties, and the coating material showed promising potential to be applied in the medical device.
Divchev, D; Nienaber, C; Ince, H
There is ongoing development of new therapeutic regimens in the use of antithrombotic agents and anticoagulants focussing on acute coronary syndrome (ACS) with an increasing impact on current guidelines over the last years. This was especially accompanied by an increase in innovative percutaneous coronary interventional (PCI) methods in patients with ACS, non-ST-segment elevation myocardial infarction (NSTEMI) or ST-segment elevation myocardial infarction (STEMI) with a need for therapeutics with more sufficient and effective antiplatelet action. On the other hand, newer direct and indirect thrombin inhibitors with primary use in prevention and therapy of thromboembolic events have been shown to have beneficial and even superior effects in ACS with or without PCI. The current review aims to report on the evidence-based use of approved antithrombotic agents and anticoagulants in ACS with special focus on PCI according to the actualized European guidelines.
Nagata, Naoyoshi; Niikura, Ryota; Yamada, Atsuo; Sakurai, Toshiyuki; Shimbo, Takuro; Kobayashi, Yuka; Okamoto, Makoto; Mitsuno, Yuzo; Ogura, Keiji; Hirata, Yoshihiro; Fujimoto, Kazuma; Akiyama, Junichi; Uemura, Naomi; Koike, Kazuhiko
Background Middle gastrointestinal bleeding (MGIB) risk has not been fully investigated due to its extremely rare occurrence and the need for multiple endoscopies to exclude upper and lower gastrointestinal bleeding. This study investigated whether MGIB is associated with the use of non-steroidal anti-inflammatory drugs (NSAIDs), low-dose aspirin (LDA), thienopyridines, anticoagulants, and proton-pump inhibitors (PPIs), and whether PPI use affects the interactions between MGIB and antithrombotic drugs. Methods In this multicenter, hospital-based, case-control study, 400 patients underwent upper and lower endoscopy, 80 had acute overt MGIB and 320 had no bleeding and were matched for age and sex as controls (1:4). MGIB was additionally evaluated by capsule and/or double-balloon endoscopy, after excluding upper and lower GI bleeding. Adjusted odds ratios (AOR) for MGIB risk were calculated using conditional logistic regression. To estimate the propensity score, we employed a logistic regression model for PPI use. Results In patients with MGIB, mean hemoglobin level was 9.4 g/dL, and 28 patients (35%) received blood transfusions. Factors significantly associated with MGIB were chronic kidney disease (p<0.001), liver cirrhosis (p = 0.034), NSAIDs (p<0.001), thienopyridines (p<0.001), anticoagulants (p = 0.002), and PPIs (p<0.001). After adjusting for these factors, NSAIDs (AOR, 2.5; p = 0.018), thienopyridines (AOR, 3.2; p = 0.015), anticoagulants (AOR, 4.3; p = 0.028), and PPIs (AOR; 2.0; p = 0.021) were independently associated with MGIB. After adjusting for propensity score, the use of PPIs remained an independent risk factors for MGIB (AOR, 1.94; p = 0.034). No significant interactions were observed between PPIs and NSAIDs (AOR, 0.7; p = 0.637), LDA (AOR, 0.3; p = 0.112), thienopyridine (AOR, 0.7, p = 0.671), or anticoagulants (AOR, 0.5; p = 0.545). Conclusions One-third of patients with acute small intestinal bleeding required blood transfusion. NSAIDs
Rosell, Daniel R; Siever, Larry J
Aggression and violence represent a significant public health concern and a clinical challenge for the mental healthcare provider. A great deal has been revealed regarding the neurobiology of violence and aggression, and an integration of this body of knowledge will ultimately serve to advance clinical diagnostics and therapeutic interventions. We will review here the latest findings regarding the neurobiology of aggression and violence. First, we will introduce the construct of aggression, with a focus on issues related to its heterogeneity, as well as the importance of refining the aggression phenotype in order to reduce pathophysiologic variability. Next we will examine the neuroanatomy of aggression and violence, focusing on regional volumes, functional studies, and interregional connectivity. Significant emphasis will be on the amygdala, as well as amygdala-frontal circuitry. Then we will turn our attention to the neurochemistry and molecular genetics of aggression and violence, examining the extensive findings on the serotonergic system, as well as the growing literature on the dopaminergic and vasopressinergic systems. We will also address the contribution of steroid hormones, namely, cortisol and testosterone. Finally, we will summarize these findings with a focus on reconciling inconsistencies and potential clinical implications; and, then we will suggest areas of focus for future directions in the field.
Petruccelli, Filippo; Diotaiuti, Pierluigi; Verrastro, Valeria; Petruccelli, Irene; Federico, Roberta; Martinotti, Giovanni; Fossati, Andrea; Di Giannantonio, Massimo; Janiri, Luigi
Introduction. Emotionally dependent subjects may engage in controlling, restrictive, and aggressive behaviours, which limit their partner's autonomy. The underlying causes of such behaviours are not solely based on levels of aggression, but act as a mean of maintaining the subject's own sense of self-worth, identity, and general functioning. Objective. The aim of the paper is to explore the correlation between affective dependency and reactive/proactive aggression and to evaluate individual differences as predisposing factors for aggressive behaviour and emotional dependency. Methods. The Spouse-Specific Dependency Scale (SSDS) and the Reactive Proactive Questionnaire (RPQ) were administered to a sample of 3375 subjects. Results. In the whole sample, a positive correlation between emotional dependency and proactive aggression was identified. Differences with regard to sex, age group, and geographical distribution were evidenced for the scores of the different scales. Conclusion. A fundamental distinction between reactive and proactive aggression was observed, anchoring proactive aggression more strictly to emotional dependency. Sociocultural and demographical variables, together with the previous structuring of attachment styles, help to determine the scope, frequency, and intensity of the demands made to the partner, as well as to feed the fears of loss, abandonment, or betrayal. PMID:25054147
Cornaggia, Cesare Maria; Beghi, Massimiliano; Pavone, Fabrizio; Barale, Francesco
Although fairly frequent in psychiatric in-patient, episodes of aggression/violence are mainly limited to verbal aggression, but the level of general health is significantly lower in nurses who report 'frequent' exposure to violent incidents, and there is disagreement between patients and staff concerning predictors of these episodes. We searched the Pubmed, Embase and PsychInfo databases for English, Italian, French or German language papers published between 1 January 1990 and 31 March 2010 using the key words "aggress*" (aggression or aggressive) "violen*" (violence or violent) and "in-patient" or "psychiatric wards", and the inclusion criterion of an adult population (excluding all studies of selected samples such as a specific psychiatric diagnosis other than psychosis, adolescents or the elderly, men/women only, personality disorders and mental retardation). The variables that were most frequently associated with aggression or violence in the 66 identified studies of unselected psychiatric populations were the existence of previous episodes, the presence of impulsiveness/hostility, a longer period of hospitalisation, non-voluntary admission, and aggressor and victim of the same gender; weaker evidence indicated alcohol/drug misuse, a diagnosis of psychosis, a younger age and the risk of suicide. Alcohol/drug misuse, hostility, paranoid thoughts and acute psychosis were the factors most frequently involved in 12 studies of psychotic patients. Harmony among staff (a good working climate) seems to be more useful in preventing aggression than some of the other strategies used in psychiatric wards, such as the presence of male nurses.
JACKSON, ROBERT R.; CROSS, FIONA R.
We use the term ‘aggressive mimic’ for predators that communicate with their prey by making signals to indirectly manipulate prey behaviour. For understanding why the aggressive mimic’s signals work, it is important to appreciate that these signals interface with the prey’s perceptual system, and that the aggressive mimic can be envisaged as playing mind games with its prey. Examples of aggressive mimicry vary from instances in which specifying a model is straight forward to instances where a concise characterisation of the model is difficult. However, the less straightforward examples of aggressive mimicry may be the more interesting examples in the context of animal cognition. In particular, there are spiders that prey on other spiders by entering their prey’s web and making signals. Web invasion brings about especially intimate contact with their prey’s perceptual system because the prey spider’s web is an important component of the prey spider’s sensory apparatus. For the web-invading spider, often there is also a large element of risk when practising aggressive mimicry because the intended prey is also a potential predator. This element of risk, combined with exceptionally intimate interfacing with prey perceptual systems, may have favoured the web-invading aggressive mimic’s strategy becoming strikingly cognitive in character. Yet a high level of flexibility may be widespread among aggressive mimics in general and, on the whole, we propose that research on aggressive mimicry holds exceptional potential for advancing our understanding of animal cognition. PMID:23976823
Batrinos, Menelaos L
Atavistic residues of aggressive behavior prevailing in animal life, determined by testosterone, remain attenuated in man and suppressed through familial and social inhibitions. However, it still manifests itself in various intensities and forms from; thoughts, anger, verbal aggressiveness, competition, dominance behavior, to physical violence. Testosterone plays a significant role in the arousal of these behavioral manifestations in the brain centers involved in aggression and on the development of the muscular system that enables their realization. There is evidence that testosterone levels are higher in individuals with aggressive behavior, such as prisoners who have committed violent crimes. Several field studies have also shown that testosterone levels increase during the aggressive phases of sports games. In more sensitive laboratory paradigms, it has been observed that participant's testosterone rises in the winners of; competitions, dominance trials or in confrontations with factitious opponents. Aggressive behavior arises in the brain through interplay between subcortical structures in the amygdala and the hypothalamus in which emotions are born and the prefrontal cognitive centers where emotions are perceived and controlled. The action of testosterone on the brain begins in the embryonic stage. Earlier in development at the DNA level, the number of CAG repeats in the androgen receptor gene seems to play a role in the expression of aggressive behavior. Neuroimaging techniques in adult males have shown that testosterone activates the amygdala enhancing its emotional activity and its resistance to prefrontal restraining control. This effect is opposed by the action of cortisol which facilitates prefrontal area cognitive control on impulsive tendencies aroused in the subcortical structures. The degree of impulsivity is regulated by serotonin inhibiting receptors, and with the intervention of this neurotransmitter the major agents of the neuroendocrine
Miller, Cameron A; Parrott, Dominic J; Giancola, Peter R
This study investigated the mediating effect of trait aggressivity on the relation between agreeableness and alcohol-related aggression in a laboratory setting. Participants were 116 healthy male social drinkers between 21 and 30 years of age. Agreeableness and trait aggressivity were measured using the Big Five Inventory and the Buss-Perry Aggression Questionnaire, respectively. Following the consumption of an alcohol or no-alcohol control beverage, participants completed a modified version of the Taylor Aggression Paradigm, in which electric shocks were received from and administered to a fictitious opponent during a competitive task. Aggression was operationalized as the proportion of the most extreme shocks delivered to the fictitious opponent under conditions of low and high provocation. Results indicated that lower levels of agreeableness were associated with higher levels of trait aggressivity. In turn, higher levels of trait aggressivity predicted extreme aggression in intoxicated, but not sober, participants under low, but not high, provocation. Findings highlight the importance of examining determinants of intoxicated aggression within a broader theoretical framework of personality.
Röll, Judith; Koglin, Ute; Petermann, Franz
Accumulating evidence suggests that emotion dysregulation is associated with psychopathology. This paper provides a review of recent longitudinal studies that investigate the relationship between emotion regulation and aggressive behavior in childhood age. While there is substantial evidence for assuming a close relation of emotion regulation and aggressive behavior, moderating and mediating factors like gender and peer rejection have been established. Furthermore, results suggest emotion dysregulation as an important risk factor of aggressive behavior. Several directions for future research are pointed out to further validate and refine the reviewed relationships.
Smith, Craig E; Fischer, Kurt W; Watson, Malcolm W
Over three decades of research have established a positive connection between fantasizing about aggression and enacting aggression. Such findings have provided strong evidence against the catharsis view of aggressive fantasy. However, little attention has been paid to the potentially nuanced nature of the link between fantasy aggression and actual aggression. In the present article, we examined the influence of four variables in the aggressive fantasy-aggressive behavior link: gender, exposure to violence, fantasy absorption, and level of fantasy about harm befalling loved ones and the self (dysphoric fantasy). Using data from a diverse, community-based sample of 7-14-year olds and their mothers, we replicated the general finding that aggressive fantasy is positively associated with real-world aggressive behavior. However, we also found that the interaction of aggressive fantasy and exposure to violence related significantly to aggression, as did the relation between aggressive fantasy and dysphoric fantasy. When exposure to violence was low, even high levels of aggressive fantasizing did not predict aggressive behavior, and, when aggressive fantasizing was low, even high levels of exposure to violence did not predict aggressive behavior. Similarly, when dysphoric fantasy was high, the connection between fantasy aggression and real aggression was markedly attenuated. The implications of these findings for intervention efforts and future research are considered.
Brito, Marlon V; de Oliveira, Cleide; Salu, Bruno R; Andrade, Sonia A; Malloy, Paula M D; Sato, Ana C; Vicente, Cristina P; Sampaio, Misako U; Maffei, Francisco H A; Oliva, Maria Luiza V
The Bauhinia bauhinioides Kallikrein Inhibitor (BbKI) is a Kunitz-type serine peptidase inhibitor of plant origin that has been shown to impair the viability of some tumor cells and to feature a potent inhibitory activity against human and rat plasma kallikrein (Kiapp 2.4 nmol/L and 5.2 nmol/L, respectively). This inhibitory activity is possibly responsible for an effect on hemostasis by prolonging activated partial thromboplastin time (aPTT). Because the association between cancer and thrombosis is well established, we evaluated the possible antithrombotic activity of this protein in venous and arterial thrombosis models. Vein thrombosis was studied in the vena cava ligature model in Wistar rats, and arterial thrombosis in the photochemical induced endothelium lesion model in the carotid artery of C57 black 6 mice. BbKI at a concentration of 2.0 mg/kg reduced the venous thrombus weight by 65% in treated rats in comparison to rats in the control group. The inhibitor prolonged the time for total artery occlusion in the carotid artery model mice indicating that this potent plasma kallikrein inhibitor prevented thrombosis.
Cong, Yue; Wang, Limei; Peng, Renjun; Zhao, Yang; Bai, Fan; Yang, Chao; Liu, Xiaolan; Wang, Daqian; Ma, Baiping; Cong, Yuwen
The thromboxane (Tx) A2 pathway is a major contributor to the amplification of initial platelet activation and is therefore a key drug target. To identify potent small-molecule inhibitors of the thromboxane prostaglandin (TP) receptor, we screened a small steroidal saponin library using U46619-induced rat platelet aggregation assays. Timosaponin AIII (TAIII) was identified as a potent inhibitor of U46619-induced rat platelet aggregation and exhibited superior selectivity for the TP receptor versus other G protein-coupled receptors and a PKC activator. TAIII inhibited U46619-induced rat platelet aggregation independent of increases in cAMP and cGMP and the inhibition of TxA2 production. Both PKC and PLC activators restored TAIII-inhibited platelet aggregation, whereas TAIII did not inhibit platelet aggregation induced by co-activation of the G12/13 and Gz pathways. Furthermore, TAIII did not affect the platelet shape change or ROCK2 phosphorylation evoked by low-dose U46619. In vivo, TAIII prolonged tail bleeding time, reduced the mortality of animals with acute pulmonary thromboembolism and significantly reduced venous thrombus weight. Our study suggests that TAIII, by preferentially targeting Gq-mediated PLC/PKC signaling from the TP receptor, induces stronger in vitro antiplatelet activity and in vivo antithrombotic effects and may be an excellent candidate for the treatment of thrombotic disorders. PMID:27934923
Megalemou, Kalliopi; Sioriki, Eleni; Lordan, Ronan; Dermiki, Maria; Nasopoulou, Constantina; Zabetakis, Ioannis
Given that fermented dairy products exhibit high bioactivities against cardiovascular diseases (CVDs), the anti-thrombotic properties, fatty acid profiles and sensory properties of cow, goat and ewe derived Greek yogurts have been assessed and compared. The total lipids (TL), total polar lipids (TPL), total neutral lipids (TNL) were obtained and the polar lipid fractions were further separated by thin layer chromatography (TLC). These lipid samples (TL, TPL and TLC fractions) were subsequently assessed for their biological activity against atherosclerosis based on the in vitro inhibition of Platelet Activating Factor (PAF)-induced platelet aggregation. The fatty acid compositions of all yogurts were analyzed by Gas Chromatography with flame ionization detector (GC-FID). Goat yogurt lipids have been found to exert more potent inhibitory activity (i.e. lower IC50 values in both TL and TPL samples) in contrast to the corresponding fractions of cow and ewe yogurts. The observed sensory data indicates that ewe yogurt was the most palatable of all three Greek yogurts.
Teten, Andra L; Miller, Lisa A; Bailey, Sara D; Dunn, Nancy Jo; Kent, Thomas A
Our long term interest is to develop a developmental model of impulsive aggression based on a confluence of social, psychological and biological features. This approach incorporates neurobiological research, which has identified language processing deficits as a unique characteristic of impulsive aggressors and extends it to include emotional deficits. As an initial test of this hypothesis, we examined whether empathy and alexithymia were associated with impulsive aggression. Regressions were performed to explore the associations among impaired empathy, alexithymia, impulsive aggression, verbal and physical general aggression. Among impulsive aggressive veterans (n=38) recruited from a VA trauma clinic, alexithymia predicted impulsive aggression and empathic deficits predicted verbal aggression. Neither emotional awareness deficit predicted general physical aggression in this middle-aged sample. Results suggested that empathic deficits were associated with general verbal aggression, but alexithymia was uniquely associated with impulsive aggression. Consideration of alexithymia in impulsive aggression has implications for its etiology, prevention and treatment.
Summarizes the major research findings on the relationship between television violence and aggressive behavior; concludes that, while there is no definitive proof that such a relationship exists, the evidence points strongly in that direction. (GT)
Science News, 1978
Recent studies done by federal researchers indicate that human aggression may be affected by a critical balance of two or three key brain chemical neurotransmitters. Results of this study with human beings are included in this article. (MA)
Breast cancers that are discovered in the period between regular screening mammograms—known as interval cancers—are more likely to have features associated with aggressive behavior and a poor prognosis than cancers found via screening mammograms.
Takahashi, Aki; Quadros, Isabel M.; de Almeida, Rosa M. M.; Miczek, Klaus A.
Serotonin (5-HT) has long been considered as a key transmitter in the neurocircuitry controlling aggression. Impaired regulation of each subtype of 5-HT receptor, 5-HT transporter, synthetic and metabolic enzymes has been linked particularly to impulsive aggression. The current summary focuses mostly on recent findings from pharmacological and genetic studies. The pharmacological treatments and genetic manipulations or polymorphisms of a specific target (e.g., 5-HT1A receptor) can often result in inconsistent results on aggression, due to “phasic” effects of pharmacological agents vs “trait”-like effects of genetic manipulations. Also, the local administration of a drug using the intracranial microinjection technique has shown that activation of specific subtypes of 5-HT receptors (5-HT1A and 5-HT1B) in mesocorticolimbic areas can reduce species-typical and other aggressive behaviors, but the same receptors in the medial prefrontal cortex or septal area promote escalated forms of aggression. Thus, there are receptor populations in specific brain regions that preferentially modulate specific types of aggression. Genetic studies have shown important gene × environment interactions; it is likely that the polymorphisms in the genes of 5-HT transporters (e.g., MAO A) or rate-limiting synthetic and metabolic enzymes of 5-HT determine the vulnerability to adverse environmental factors that escalate aggression. We also discuss the interaction between the 5-HT system and other systems. Modulation of 5-HT neurons in the dorsal raphe nucleus by GABA, glutamate, and CRF profoundly regulate aggressive behaviors. Also, interactions of the 5-HT system with other neuropeptides (arginine vasopressin, oxytocin, neuropeptide Y, opioid) have emerged as important neurobiological determinants of aggression. Studies of aggression in genetically modified mice identified several molecules that affect the 5-HT system directly (e.g., Tph2, 5-HT1B, 5-HT transporter, Pet1, MAOA) or
Pelliccia, Francesco; Rollini, Fabiana; Marazzi, Giuseppe; Greco, Cesare; Gaudio, Carlo; Angiolillo, Dominick J; Rosano, Giuseppe
The combination of AF and coronary artery disease not only is a common clinical setting, it is also a complex setting to deal with anticoagulation and antiplatelet therapy, and it is associated with significantly higher mortality rates. Unfortunately, there are no sufficient data available to optimally guide clinical practice in such settings. This review focuses specifically on newer oral anticoagulants (NOACs) associated with dual antiplatelet therapy (DAPT) in patients with coronary artery disease undergoing percutaneous coronary intervention (PCI). There are no randomized studies comparing vitamin K antagonists and NOACs in patients with AF undergoing PCI either for acute coronary syndromes or for stable patients, i.e. those patients who have an indication to receive DAPT. Moreover, new antiplatelet agents such as ticagrelor and prasugrel have entered the market for acute coronary syndromes. So far, there are no large-scale randomized studies published evaluating these newer antiplatelet agents in patients with AF receiving either vitamin K antagonists or NOACs, adding to the uncertainty on how to use these antithrombotics in combination when both coronary artery disease (unstable or stable patients) and AF converge in a given patient. The lack of large outcome trials and the large number of possible combinations are reflected in the wide variety of practices in the real world. To date, given the lack of data, watchfulness when using NOACs as component of DAPT or triple oral antithrombotic therapy is warranted.
Trestman, Robert L
Forensic psychiatric units are high-risk environments for aggressive behavior. Many elements are necessary for the successful reduction or elimination of aggression in the process of creating a safe treatment environment. Many specific interventions have been attempted over the years with various degrees of, usually limited, success. Tolisano et al. present an integrated behavioral approach with solid theoretical underpinnings and opportunities to support significant safety improvements for select patients, albeit with several caveats.
Stockley, Paula; Campbell, Anne
This paper introduces a Theme Issue combining interdisciplinary perspectives in the study of female competition and aggression. Despite a history of being largely overlooked, evidence is now accumulating for the widespread evolutionary significance of female competition. Here, we provide a synthesis of contributions to this Theme Issue on humans and other vertebrates, and highlight directions for future research. Females compete for resources needed to survive and reproduce, and for preferred mates. Although female aggression takes diverse forms, under most circumstances relatively low-risk competitive strategies are favoured, most probably due to constraints of offspring production and care. In social species, dominance relationships and threats of punishment can resolve social conflict without resort to direct aggression, and coalitions or alliances may reduce risk of retaliation. Consistent with these trends, indirect aggression is a low cost but effective form of competition among young women. Costs are also minimized by flexibility in expression of competitive traits, with aggressive behaviour and competitive signalling tailored to social and ecological conditions. Future research on female competition and the proximate mediators of female aggression will be greatly enhanced by opportunities for interdisciplinary exchange, as evidenced by contributions to this Theme Issue. PMID:24167303
Tulogdi, Aron; Biro, Laszlo; Barsvari, Beata; Stankovic, Mona; Haller, Jozsef; Toth, Mate
Our recent studies showed that brain areas that are activated in a model of escalated aggression overlap with those that promote predatory aggression in cats. This finding raised the interesting possibility that the brain mechanisms that control certain types of abnormal aggression include those involved in predation. However, the mechanisms of predatory aggression are poorly known in rats, a species that is in many respects different from cats. To get more insights into such mechanisms, here we studied the brain activation patterns associated with spontaneous muricide in rats. Subjects not exposed to mice, and those which did not show muricide were used as controls. We found that muricide increased the activation of the central and basolateral amygdala, and lateral hypothalamus as compared to both controls; in addition, a ventral shift in periaqueductal gray activation was observed. Interestingly, these are the brain regions from where predatory aggression can be elicited, or enhanced by electrical stimulation in cats. The analysis of more than 10 other brain regions showed that brain areas that inhibited (or were neutral to) cat predatory aggression were not affected by muricide. Brain activation patterns partly overlapped with those seen earlier in the cockroach hunting model of rat predatory aggression, and were highly similar with those observed in the glucocorticoid dysfunction model of escalated aggression. These findings show that the brain mechanisms underlying predation are evolutionarily conservative, and indirectly support our earlier assumption regarding the involvement of predation-related brain mechanisms in certain forms of escalated social aggression in rats.
Lobbestael, Jill; Cousijn, Janna; Brugman, Suzanne; Wiers, Reinout W
This study assessed the association between indirectly measured behavioural approach- and avoidance-related tendencies on the one hand, and reactive versus proactive aggression on the other hand. Reactive aggression (i.e. the impulsive, anger-driven aggression expressed in response to threatening stimuli) was differentiated from proactive aggression (i.e. the more controlled aggression motivated towards obtaining specific goals). A mixed sample of 118 patients and healthy controls filled out a self-report measure to assess their degree of reactive and proactive aggression, and then performed an Approach Avoidance Task in which they were asked to pull or push a joystick in response to a format-feature of a series of pictures, irrespective of their contents. The pictorial stimuli used in this task included attack-related scenes and angry faces, along with neutral, positive and negative control stimuli. The results were controlled for the level of personality disorder pathology, gender, and age. The findings indicated that reactive but not proactive aggression was related to the relative behavioural tendency to approach attack-related scenes, along with positive stimuli. These findings reflect the hyper-reactivity of the approach-related reward system in reactive aggression, and further our knowledge into the distinct correlates and precursors of reactive and proactive aggression.
Fulwiler, Carl; Eckstine, Joy; Kalsy, Sapna
Although alcohol consumption is involved in most acts of violence, most people do not become violent when they drink. Individuals also respond differently to alcohol on laboratory measures of aggression. The objective of this study was to determine whether individual differences in the effects of alcohol on a laboratory measure of aggression are related to specific personality traits and/or serotonin function, as measured by prolactin response to pharmacochallenge. Psychometric scales for impulsiveness, aggression, and anger, as well as a probe for suspiciousness, were administered to 10 healthy male social drinkers. Trait serotonin function was determined by citalopram challenge. The effect of alcohol on the Point Subtraction Aggression Paradigm was determined by comparing aggression scores with and without 1 g/kg alcohol. Impulsivity scores were significantly correlated with the change in aggressive responding after alcohol. Aggression, anger, and suspiciousness scores were not. Prolactin response did not predict the effect of alcohol on aggressive responding. The results suggest that trait impulsiveness may mediate the effects of alcohol on aggression in normal males.
Gallus, Alexander S.; Wittkowsky, Ann; Crowther, Mark; Hylek, Elaine M.; Palareti, Gualtiero
Background: The objective of this article is to summarize the published literature concerning the pharmacokinetics and pharmacodynamics of oral anticoagulant drugs that are currently available for clinical use and other aspects related to their management. Methods: We carried out a standard review of published articles focusing on the laboratory and clinical characteristics of the vitamin K antagonists; the direct thrombin inhibitor, dabigatran etexilate; and the direct factor Xa inhibitor, rivaroxaban Results: The antithrombotic effect of each oral anticoagulant drug, the interactions, and the monitoring of anticoagulation intensity are described in detail and discussed without providing specific recommendations. Moreover, we describe and discuss the clinical applications and optimal dosages of oral anticoagulant therapies, practical issues related to their initiation and monitoring, adverse events such as bleeding and other potential side effects, and available strategies for reversal. Conclusions: There is a large amount of evidence on laboratory and clinical characteristics of vitamin K antagonists. A growing body of evidence is becoming available on the first new oral anticoagulant drugs available for clinical use, dabigatran and rivaroxaban. PMID:22315269
Pliszka, Steven R.; Kafantaris, Vivian; Sauder, Colin; Posner, Jonathan; Foley, Carmel A.; Carlson, Gabrielle A.; Crowell, Judith A.; Margulies, David M.
Abstract Objective: Diagnostic criteria for disruptive mood dysregulation disorder (DMDD) require 1) periodic rageful outbursts and 2) disturbed mood (anger or irritability) that persists most of the time in between outbursts. Stimulant monotherapy, methodically titrated, often culminates in remission of severe aggressive behavior, but it is unclear whether those with persistent mood symptoms benefit less.This study examined the association between the presence of persistent mood disturbances and treatment outcomes among children with attention-deficit/hyperactivity disorder (ADHD) and periodic aggressive, rageful outbursts. Methods: Within a cohort of children with ADHD and aggressive behavior (n = 156), the prevalence of persistent mood symptoms was evaluated at baseline and after completion of a treatment protocol that provided stimulant monotherapy and family-based behavioral treatment (duration mean [SD] = 70.04 [37.83] days). The relationship of persistent mood symptoms on posttreatment aggressive behavior was assessed, as well as changes in mood symptoms. Results: Aggressive behavior and periodic rageful outbursts remitted among 51% of the participants. Persistent mood symptoms at baseline did not affect the odds that aggressive behavior would remit during treatment. Reductions in symptoms of sustained mood disturbance accompanied reductions in periodic outbursts. Children who at baseline had high irritability but low depression ratings showed elevated aggression scores at baseline and after treatment; however, they still displayed large reductions in aggression. Conclusions: Among aggressive children with ADHD, aggressive behaviors are just as likely to decrease following stimulant monotherapy and behavioral treatment among those with sustained mood symptoms and those without. Improvements in mood problems are evident as well. Therefore, the abnormalities in persistent mood described by DMDD's criteria do not contraindicate stimulant therapy as
Lochman, John E.
Secondary prevention programs for aggressive children should be based on research about processes which mediate children's expression of aggressive behavior. The relative importance of perceived competence, self-esteem, and social problem solving processes was investigated in 20 aggressive and 18 non-aggressive fourth and fifth grade boys. Teacher…
The dopaminergic system regulates aggression in humans and other mammals. To investigate if birds with genetic propensity for high and low aggressiveness may exhibit distinctly different aggressive mediation via dopamine (DA) D1 and D2 receptor pathways, two high aggressive (DXL and LGPS) and one lo...
Risser, Scott D.
To investigate the relationship between relational aggression and school performance, this study examined the relative and combined associations among relational aggression, overt aggression, and victimization and children's academic performance. Additionally this study examined the relative associations among relational and overt aggression and…
Schwab Reese, Laura M.; Harland, Karisa; Smithart, Kelsey
Abstract Intimate partner aggression is a leading cause of injury among women of child-bearing age. Research suggests that pregnancy and the postpartum period are times of increased vulnerability to aggression. Since rural women are at an increased risk of intimate partner aggression, research is needed to examine the role of pregnancy and the presence of children on intimate partner aggression among this vulnerable population. The purpose of this study is to examine the association between young children and intimate partner aggression victimization and perpetration among a rural sample. This analysis utilized data from biologic females of child-bearing age from the Keokuk County Rural Health Study, a cohort study of over 1,000 rural families conducted from 1994 to 2011. Crude and adjusted logistic regression was used to determine the relationship between having a young child and experiencing four forms of intimate partner aggression: verbal aggression perpetration, verbal aggression victimization, physical aggression perpetration, and physical aggression victimization. Having young children was significantly associated with increased odds of perpetrating verbal aggression but not victimization of verbal aggression or perpetration and victimization of physical aggression. This significant relationship persisted after adjustment for education, employment, or location of residence but not age or marital status. The increased odds of perpetrating verbal aggression among mothers in a rural area highlight the need for interventions designed for rural parents. One method of reducing intimate partner aggression may be to incorporate intimate partner aggression prevention activities into existing child abuse intervention activities. PMID:27626037
Sutton, Sara E.; Cowen, Emory L.; Crean, Hugh F.; Wyman, Peter A.; Work, William C.
Examined correlates of aggression in highly stressed urban children in second and third grade and again in third through fifth grade. Found that difficult temperament and lack of parental warmth related to aggression in early grades; learning problems and poor social skills related to aggression at both times. Early aggression predicted later…
Spieker, Susan J.; Campbell, Susan B.; Vandergrift, Nathan; Pierce, Kim M.; Cauffman, Elizabeth; Susman, Elizabeth J.; Roisman, Glenn I.
This study examined gender differences in the level and developmental course of relational aggression in middle childhood, as well as early predictors and outcomes of relational aggression, after controlling for concurrent physical aggression. Relational (RAgg) and Physical aggression (PAgg) scores for 558 boys and 545 girls at the ages of eight…
[Interaction of anti-thrombotic and anti-inflammatory activities of commonly used traditional Chinese medicine for promoting blood circulation and removing blood stasis revealed by network pharmacology analysis].
Lü, Ming; Wang, Tai-yi; Tian, Xiao-xuan; Shi, Xin-hui; Fan, Guan-wei; Zhang, Yan; Zhu, Yan
Chinese traditional patent medicine for promoting blood circulation and removing blood stasis(PBCRBS) originated from traditional Chinese medicine theory and had approved efficacy and safety standards. However, its compatibility regularity and anti-thrombotic mechanism is not clear. To analyze the compatibility regularity and anti-thrombotic mechanism of Chinese traditional patent medicine for PBCRBS, a statistical and bioinformatics analysis was carried out using traditional Chinese medicine inheritance support system (TICMISS, V2.0) and ingenuity pathway analysis (IPA). The compatibility regularity analysis shows that the most commonly used herb combinations are Danshen (Salvia miltiorrhiza Bge.), Chuanxiong (Ligusticum chuanxiong Hort.) and Honghua (Carthamustinctorius L.). The anti-thrombotic mechanism analysis reveals that 25 ingredients have an effect on 29 thrombosis related molecules which 23 molecules are related to inflammation response. Furthermore, there are 5 inflammation molecules (NOS2, PTGS2, IL6, TNF, IL1β) served as major targets. At the same time, Danshen, Chuangxiong and Honghua mainly used as sovereign herb or minister herb in the application of cardiovascular and cerebrovascular diseases. Therefore, Chinese traditional patent medicine for PBCRBS probably has an effect on anti-thrombotic activity through inhibiting the inflammatory response. In summary, the most commonly used herb combinations of Chinese traditional patent medicine for PBCRBS are Danshen, Chuanxiong and Honghua. Inhibiting inflammatory response, especially inflammation related molecules (NOS2, PTGS2, IL6, TNF and IL1β), is probably a new starting point to clarify the anti-thrombotic mechanism of Chinese patent medicine for PBCRBS.
Henry, D; Guerra, N; Huesmann, R; Tolan, P; VanAcker, R; Eron, L
We report a study aimed at understanding the effects of classroom normative influences on individual aggressive behavior, using samples of 614 and 427 urban elementary school children. Participants were assessed with measures of aggressive behavior and normative beliefs about aggression. We tested hypotheses related to the effects of personal normative beliefs, descriptive classroom norms (the central tendency of classmates' aggressive behavior), injunctive classroom normative beliefs (classmates' beliefs about the acceptability of aggression), and norm salience (student and teacher sanctions against aggression) on longitudinal changes in aggressive behavior and beliefs. injunctive norms affected individual normative beliefs and aggression, but descriptive norms had no effect on either. In classrooms where students and teachers made norms against aggression salient, aggressive behavior diminished over time. Implications for classroom behavior management and further research are discussed.
Gursoy, A; Cesur, M; Aktaş, B; Utkan, G; Gedik, V Tonyukuk; Erdogan, Mf; Kamel, N
Aggressive fibromatosis (AF) is a rare, locally aggressive, proliferative fibroblastic lesion affecting musculoaponeurotic structures, most often, of the limbs and trunk. Intracranial AF is extremely rare and requires aggressive treatment to prevent recurrence. We present a case of a 34 year-old male with AF involving intracranial structures causing panhypopituitarism and diabetes insipidus. Patient was admitted to hospital because of polyuria, polydipsia, and loss of libido, impotence, hearing loss, and gait disturbance. On cranial magnetic resonance imaging, the lesion extended through the sphenoid sinus into the both pterygoid recesses, destroying the left lateral wall of the sphenoid sinus and invading the retroorbital area. There was also a distinct lesion in the hypothalamic area. The tumor was markedly isointense on both T2- and T1-weighted images relative to gray matter, and enhanced strongly after administration of gadolinium. The patient underwent partial resection of the lesion via a transcranial approach. The pathological examination of the mass was reported as AF. No other sites were found to be involved by thorax and abdominal tomography. Hormonal assessment of hypothalamic-pituitary dysfunction revealed panhypopituitarism with central diabetes insipidus. Replacement therapy was instituted. In this case, standard treatment of wide-field surgical resection was impossible. On the basis of reports that radiotherapy is an effective treatment for this kind of tumor, we administered radiation to the affected area, since chemotherapy and hormonal treatment of non-resectable tumors are not satisfactory. To our knowledge, this is the first reported case of AF presenting as panhypopituitarism with central diabetes insipidus.
Shi, Bing; Xie, Hongling
Using peer nominations of physical aggression and perceived popularity in the spring semester of fifth grade, we identified 54 popular aggressive and 42 nonpopular aggressive preadolescents in a diverse sample of 318 participants recruited from an urban school district. Physical aggression in the spring semester of sixth grade was included to…
Gasser, Luciano; Malti, Tina; Gutzwiller-Helfenfinger, Eveline
The authors investigated 7- and 9-year-old children's moral understanding of retaliation as compared to unprovoked aggression with regard to their aggressive behavior status. Based on peer ratings, 48 children were selected as overtly aggressive and 91 as nonaggressive. Their moral understanding of retaliation and unprovoked aggression was…
Coyne, Sarah M.
Most researchers on media and aggression have examined the behavioral effects of viewing physical aggression in the media. Conversely, in the current study, I examined longitudinal associations between viewing "relational aggression" on TV and subsequent aggressive behavior. Participants included 467 adolescents who completed a number of…
Coyne, Sarah M.; Archer, John; Eslea, Mike
Numerous studies have shown that viewing violence in the media can influence an individual's subsequent aggression, but none have examined the effect of viewing indirect aggression. This study examines the immediate effect of viewing indirect and direct aggression on subsequent indirect aggression among 199 children ages 11 to 14 years. They were…
Calvete, E; Gamez-Guadix, M; Orue, I; Gonzalez-Diez, Z; Lopez de Arroyabe, E; Sampedro, R; Pereira, R; Zubizarreta, A; Borrajo, E
The objective of this study was to develop a questionnaire to assess child-to-parent aggression in adolescents and to document the extent of the problem. The questionnaire developed in this study, the Child-to-Parent Aggression Questionnaire (CPAQ), includes forms of physical and psychological aggression directed at both the mother and the father. It also includes open questions about the reasons for the aggressive acts. The CPAQ was completed by a sample of 2719 adolescents (age range: 13-18 years old, 51.4% girls). Confirmatory factor analysis supported a four-factor correlated structure (physical aggression against mother, physical aggression against father, psychological aggression against mother, and psychological aggression against father). Psychological and physical aggression against the mother was more frequent than against the father. However, there were no differences with regard to severe forms of aggression. Girls scored significantly higher on all indicators of psychological aggression, including severe psychological aggression. Nevertheless, except for the prevalence of physical aggression against mothers, which was higher in females, there were no significant differences in physical aggression against parents. Finally, the reasons provided by the adolescents for the aggression included both instrumental (e.g., to obtain permission to get home late and to access their computers) and reactive reasons (e.g., anger and self-defense). These findings highlight the complexity of child-to-parent aggression in adolescence.
Ageno, Walter; Riva, Nicoletta; Schulman, Sam; Bang, Soo Mee; Sartori, Maria Teresa; Grandone, Elvira; Beyer-Westendorf, Jan; Barillari, Giovanni; Di Minno, Matteo Nicola Dario; Dentali, Francesco
Treatment of splanchnic vein thrombosis (SVT) is a clinical challenge due to heterogeneity of clinical presentations, increased bleeding risk, and lack of evidences from clinical trials. We performed an international registry to describe current treatment strategies and factors associated with therapeutic decisions in a large prospective cohort of unselected SVT patients. A total of 613 patients were enrolled (mean age 53.1 years, standard deviation ± 14.8); 62.6% males; the majority (468 patients) had portal vein thrombosis. Most common risk factors included cirrhosis (27.8%), solid cancer (22.3%), and intra-abdominal inflammation/infection (11.7%); in 27.4% of patients, SVT was idiopathic. During the acute phase, 470 (76.7%) patients received anticoagulant drugs, 136 patients (22.2%) remained untreated. Incidental diagnosis, single vein thrombosis, gastrointestinal bleeding, thrombocytopenia, cancer, and cirrhosis were significantly associated with no anticoagulant treatment. Decision to start patients on vitamin K antagonists after an initial course of parenteral anticoagulation was significantly associated with younger age, symptomatic onset, multiple veins involvement, and unprovoked thrombosis. Although a nonnegligible proportion of SVT patients did not receive anticoagulant treatment, the majority received the same therapies recommended for patients with usual sites thrombosis, with some differences driven by the site of thrombosis and the pathogenesis of the disease.
Comai, Stefano; Tau, Michael; Pavlovic, Zoran; Gobbi, Gabriella
Patients experiencing mental disorders are at an elevated risk for developing aggressive behavior. In the past 10 years, the psychopharmacological treatment of aggression has changed dramatically owing to the introduction of atypical antipsychotics on the market and the increased use of anticonvulsants and lithium in the treatment of aggressive patients.This review (second of 2 parts) uses a translational medicine approach to examine the neurobiology of aggression, discussing the major neurotransmitter systems implicated in its pathogenesis (serotonin, glutamate, norepinephrine, dopamine, and γ-aminobutyric acid) and the neuropharmacological rationale for using atypical antipsychotics, anticonvulsants, and lithium in the therapeutics of aggressive behavior. A critical review of all clinical trials using atypical antipsychotics (aripiprazole, clozapine, loxapine, olanzapine, quetiapine, risperidone, ziprasidone, and amisulpride), anticonvulsants (topiramate, valproate, lamotrigine, and gabapentin), and lithium are presented. Given the complex, multifaceted nature of aggression, a multifunctional combined therapy, targeting different receptors, seems to be the best strategy for treating aggressive behavior. This therapeutic strategy is supported by translational studies and a few human studies, even if additional randomized, double-blind, clinical trials are needed to confirm the clinical efficacy of this framework.
Tati, Ramesh; Kristoffersson, Ann-Charlotte; Manea Hedström, Minola; Mörgelin, Matthias; Wieslander, Jörgen; van Kooten, Cees; Karpman, Diana
Adequate cleavage of von Willebrand factor (VWF) prevents formation of thrombi. ADAMTS13 is the main VWF-cleaving protease and its deficiency results in development of thrombotic microangiopathy. Besides ADAMTS13 other proteases may also possess VWF-cleaving activity, but their physiological importance in preventing thrombus formation is unknown. This study investigated if, and which, proteases could cleave VWF in the glomerulus. The content of the glomerular basement membrane (GBM) was studied as a reflection of processes occurring in the subendothelial glomerular space. VWF was incubated with human GBMs and VWF cleavage was assessed by multimer structure analysis, immunoblotting and mass spectrometry. VWF was cleaved into the smallest multimers by the GBM, which contained ADAMTS13 as well as neutrophil proteases, elastase, proteinase 3 (PR3), cathepsin-G and matrix-metalloproteinase 9. The most potent components of the GBM capable of VWF cleavage were in the serine protease or metalloprotease category, but not ADAMTS13. Neutralization of neutrophil serine proteases inhibited GBM-mediated VWF-cleaving activity, demonstrating a marked contribution of elastase and/or PR3. VWF-platelet strings formed on the surface of primary glomerular endothelial cells, in a perfusion system, were cleaved by both elastase and the GBM, a process blocked by elastase inhibitor. Ultramorphological studies of the human kidney demonstrated neutrophils releasing elastase into the GBM. Neutrophil proteases may contribute to VWF cleavage within the subendothelium, adjacent to the GBM, and thus regulate thrombus size. This anti-thrombotic mechanism would protect the normal kidney during inflammation and could also explain why most patients with ADAMTS13 deficiency do not develop severe kidney failure.
Mnafgui, Kais; Hajji, Raouf; Derbali, Fatma; Gammoudi, Anis; Khabbabi, Gaddour; Ellefi, Hedi; Allouche, Noureddine; Kadri, Adel; Gharsallah, Neji
This study aimed to evaluate the antithrombotic, anti-inflammatory and anti-cardiac remodeling properties of eugenol in isoproterenol-induced myocardial infarction in rats. Male Wistar rats were randomly divided into four groups, control, iso [100 mg/kg body weight was injected subcutaneously into rats at an interval of 24 h for 2 days (6th and 7th day) to induce MI] and pretreated animals with clopidogrel (0.2 mg/kg) and eugenol (50 mg/kg) orally for 7 days and intoxicated with isoproterenol (Iso + Clop) and (Iso + EG) groups. Isoproterenol-induced myocardial infarcted rats showed notable changes in the ECG pattern, increase in heart weight index, deterioration in the hemodynamic function and rise in plasma level of troponin-T, CK-MB and LDH and ALT by 316, 74, 172 and 45 %, respectively, with histological myocardium necrosis and cells inflammatory infiltration. In addition, significant increases in plasma levels of inflammatory biomarkers such as fibrinogen, α1, α2, β1, β2 and γ globulins with decrease level of albumin were observed in infarcted rats as compared to normal ones. Else, the angiotensin-converting enzyme (ACE) activity in plasma, kidney and heart of the isoproterenol-induced rats was significantly increased by 34, 47 and 93 %, respectively, as compared to normal group. However, the administration of eugenol induced a clear improvement in cardiac biomarkers injury, reduced inflammatory mediators proteins, increased heart activities of superoxide dismutase and glutathione peroxidase with reduce in thiobarbituric acid-reactive substances content and inhibition of ventricular remodeling process through inhibition of ACE activity. Overall, eugenol evidences high preventive effects from cardiac remodeling process.
Ceccato, Filippo; Lombardi, Giuseppe; Manara, Renzo; Emanuelli, Enzo; Denaro, Luca; Milanese, Laura; Gardiman, Marina Paola; Bertorelle, Roberta; Scanarini, Massimo; D'Avella, Domenico; Occhi, Gianluca; Boscaro, Marco; Zagonel, Vittorina; Scaroni, Carla
Aggressive pituitary adenomas (PAs) are clinically challenging for endocrinologists and neurosurgeons due to their locally invasive nature and resistance to standard treatment (surgery, medical or radiotherapy). Two pituitary-directed drugs have recently been proposed: temozolomide (TMZ) for aggressive PA, and pasireotide for ACTH-secreting PA. We describe the experience of our multidisciplinary team of endocrinologists, neurosurgeons, neuroradiologists, oncologists, otolaryngologists and pathologists with TMZ and pasireotide treatment for aggressive PAs in terms of their radiological shrinkage and genetic features. We considered five patients with aggressive PA, three of them non-secreting (two ACTH-silent and one becoming ACTH secreting), and two secreting (one GH and one ACTH). TMZ was administrated orally at 150-200 mg/m(2) daily for 5 days every 28 days to all 5 patients, and 2 of them also received pasireotide 600-900 µg bid sc. We assessed the MRI at the baseline and during TMZ or pasireotide treatment. We also checked for MGMT promoter methylation and IDH, BRAF and kRAS mutations. Considering TMZ, two patients showed PA progression, one stable disease and two achieved radiological and clinical response. Pasireotide was effective in reducing hypercortisolism and mass volume, combined with TMZ in one case. Both treatments were generally well tolerated; one patient developed a grade 2 TMZ-induced thrombocytopenia. None of patients developed hypopituitarism while taking TMZ or pasireotide treatment. No genetic anomalies were identified in the adenoma tissue. TMZ and pasireotide may be important therapies for aggressive PA, alone or in combination.
Chamandar, Fateme; Jabbari, D. Susan
The purpose of this study is the content analysis of children's stories based on the components of aggression. Participants are 66 elementary school students (16 girls and 50 boys) selected from fourth and fifth grades, using the Relational and Overt Aggression Questionnaire; completed by the teachers. Draw a Story Test (Silver, 2005) is…
Lee, Eunju J.
This study examines whether the instability of self-esteem (i.e., a high intraindividual variability in self-esteem) is differentially associated with different types of aggressive behavior by using a sample of 235 preadolescent children. Self-esteem was measured four times for four consecutive days, and proactive and reactive aggressive behaviors…
Thomas, Duane E; Bierman, Karen L
Prior research suggests that exposure to elementary classrooms characterized by high levels of student aggression may contribute to the development of child aggressive behavior problems. To explore this process in more detail, this study followed a longitudinal sample of 4,907 children and examined demographic factors associated with exposure to high-aggression classrooms, including school context factors (school size, student poverty levels, and rural vs. urban location) and child ethnicity (African American, European American). The developmental impact of different temporal patterns of exposure (e.g., primacy, recency, chronicity) to high-aggression classrooms was evaluated on child aggression. Analyses revealed that African American children attending large, urban schools that served socioeconomically disadvantaged students were more likely than other students to be exposed to high-aggressive classroom contexts. Hierarchical regressions demonstrated cumulative effects for temporal exposure, whereby children with multiple years of exposure showed higher levels of aggressive behavior after 3 years than children with primacy, less recent, and less chronic exposure, controlling for initial levels of aggression. Implications are discussed for developmental research and preventive interventions.
Runions, Kevin C; Bak, Michal; Shaw, Thérèse
Aggression in online contexts has received much attention over the last decade, yet there is a need for measures identifying the proximal psychological drivers of cyber-aggressive behavior. The purpose of this study was to present data on the newly developed Cyber-Aggression Typology Questionnaire (CATQ) designed to distinguish between four distinct types of cyber-aggression on dimensions of motivational valence and self-control. A sample 314 undergraduate students participated in the study. The results confirmed the predicted four-factor structure providing evidence for distinct and independent impulsive-aversive, controlled-aversive, impulsive-appetitive, and controlled-appetitive cyber-aggression types. Further analyses with the Berlin Cyberbullying Questionnaire, Reactive Proactive Aggression Questionnaire, and the Behavior Inhibition and Activation Systems Scale provide support for convergent and divergent validity. Understanding the motivations facilitating cyber-aggressive behavior could aid researchers in the development of new prevention and intervention strategies that focus on individual differences in maladaptive proximal drivers of aggression. Aggr. Behav. 43:74-84, 2017. © 2016 Wiley Periodicals, Inc.
Maxwell, J P; Visek, A J
Aggressive players who intentionally cause injury to their opponents are common in many sports, particularly collision sports such as Rugby Union. Although some acts of aggression fall within the rules (sanctioned), others do not (unsanctioned), with the latter tending to be less acceptable than the former. This study attempts to identify characteristics of players who are more likely to employ unsanctioned methods in order to injure an opponent. Male Rugby Union players completed questionnaires assessing aggressiveness, anger, past aggression, professionalization, and athletic identity. Players were assigned to one of two groups based on self-reported past unsanctioned aggression. Results indicated that demographic variables (e.g., age, playing position, or level of play) were not predictive of group membership. Measures of aggressiveness and professionalization were significant predictors; high scores on both indicated a greater probability of reporting the use of unsanctioned aggressive force for the sole purpose of causing injury or pain. In addition, players who had been taught how to execute aggressive illegal plays without detection were also more likely to report using excessive force to injure an opponent. Results provide further support that highly professionalized players may be more likely to use methods outside the constitutive rules of Rugby Union in order to intentionally injure their opponents. Results are discussed within the context of the increasing win-at-all-cost attitude that is becoming more prevalent in sport and its implications for youth athletes.
Baron, Robert A.; Bell, Paul A.
Eighty-six undergraduate males participated in an experiment designed to investigate the impact of various types of erotic stimuli upon aggression. On the basis of previous research, it was hypothesized that exposure to mild erotic stimuli would tend to inhibit subsequent aggression, while exposure to more arousing stimuli of this type would…
Wölfer, Ralf; Hewstone, Miles
Two theories offer competing explanations of sex differences in aggressive behavior: sexual-selection theory and social-role theory. While each theory has specific strengths and limitations depending on the victim's sex, research hardly differentiates between intrasex and intersex aggression. In the present study, 11,307 students (mean age = 14.96 years; 50% girls, 50% boys) from 597 school classes provided social-network data (aggression and friendship networks) as well as physical (body mass index) and psychosocial (gender and masculinity norms) information. Aggression networks were used to disentangle intra- and intersex aggression, whereas their class-aggregated sex differences were analyzed using contextual predictors derived from sexual-selection and social-role theories. As expected, results revealed that sexual-selection theory predicted male-biased sex differences in intrasex aggression, whereas social-role theory predicted male-biased sex differences in intersex aggression. Findings suggest the value of explaining sex differences separately for intra- and intersex aggression with a dual-theory framework covering both evolutionary and normative components.
Poland, Sarah E; Monks, Claire P; Tsermentseli, Stella
Executive function (EF) has been implicated in childhood aggression. Understanding of the role of EF in aggression has been hindered, however, by the lack of research taking into account the function and form of aggression and the almost exclusive focus on cool EF. This study examined the role of cool and hot EF in teacher reported aggression, differentiating between reactive and proactive as well as physical and relational aggression. Children (N = 106) completed laboratory tasks measuring cool (inhibition, planning, working memory) and hot EF (affective decision-making, delay of gratification). Cool, but not hot, EF significantly contributed to understanding of childhood aggression. Inhibition was a central predictor of childhood aggression. Planning and working memory, in contrast, were significant independent predictors of proactive relational aggression only. Added to this, prosocial behaviour moderated the relationship between working memory and reactive relational aggression. This study therefore suggests that cool EF, particularly inhibition, is associated with childhood aggression across the different functions and forms.
Cardilo-Reis, L; Cavalcante, M C M; Silveira, C B M; Pavão, M S G
In the ascidian Styela plicata, the oocytes are surrounded by two types of accessory cells named follicle cells and test cells. A heparin-like substance with an anticoagulant activity equivalent to 10% of mammalian heparin and about 5% as potent as the mammalian counterpart for the inhibition of thrombin by antithrombin was isolated from the oocyte test cells. In the present study, we compared the antithrombotic and hemorrhagic effects of sea squirt oocyte test cell heparin with those of porcine heparin in rat models of venous thrombosis and blood loss. Intravenous administration of the oocyte test cell heparin to Wistar rats (both sexes, weighing approximately 300 g, N = 4 in each group) at a dose of 5.0 mg/kg body weight, which produced a 1.8-fold increase in plasma activated partial thromboplastin time, inhibited thrombosis by 45 +/- 13.5% (mean +/- SD) without any bleeding effect. The same dose of porcine heparin inhibited thrombosis by 100 +/- 1.4%, but produced a blood loss three times greater than that of the saline-treated control. However, 10-fold reduction of the dose of porcine heparin to 0.5 mg/kg body weight, which produced a 5-fold increase in plasma-activated partial thromboplastin time, inhibited thrombosis by 70 +/- 13% without any bleeding effect. The antithrombotic properties of a new heparin isolated from test cells of the sea squirt S. plicata, reported here for the first time, indicate that, although sea squirt oocyte test cell heparin was a poor anticoagulant compared to porcine heparin, it had a significant antithrombotic effect without causing bleeding.
Min, Soon-Ki; Kwon, Oh-Choon; Lee, Sub; Park, Ki-Hyuk; Kim, Jong-Ki
The antithrombotic activities and bleeding effects of selected fucoidans (source from either Undaria pinnatifida sporophylls or from Fucus vesiculosus) have been compared with heparin in the ferric chloride-induced arterial thrombus mouse model. Thrombosis was induced by applying 5% ferric chloride for 3 min on the carotid artery region of Balb/c mouse. Five minutes prior to thrombus induction, mice were infused through the tail vein with either saline (control) or polysaccharides. Either fucoidan or heparin was dosed at 0.1, 1.25, 2.5, 5.0, 10, 25, or 50 mg/kg intravenously (i.v.) The carotid blood flow was monitored until more than 60 min post-thrombus induction. Mouse tail transection bleeding time was measured up to 60 min after making a cut in the mouse tail. Both antithrombotic and bleeding effects were observed in a dose-dependent manner for both fucoidans and heparin. Thrombus formation was totally (reflected by Doppler flow meter) inhibited at either 5 or 50 mg/kg of unfractionated Undaria fucoidan or a low-molecular-weight Undaria fucoidan fraction, respectively, without prolonging the time-to-stop bleeding compared with the control (p < 0.01). The total inhibition of thrombus formation was observed for unfractionated Fucus fucoidan at 25 mg/kg where the time-to-stop bleeding was still significantly prolonged, by as much as 8 ± 1.7 min (p < 0.02). In contrast the heparin-treated group showed total inhibition of thrombus formation even at a small dose of 0.8 mg/kg (400 IU) at which bleeding continued until 60 min. In conclusion algal fucoidans are highly antithrombotic without potential haemorrhagic effects compared with heparin in the arterial thrombus model, but this property differs from algal species to species, and from the molecular structure of fucoidans.
Lee, Cho Rok; Park, Seulkee; Kang, Sang-Wook; Lee, Jandee; Jeong, Jong Ju; Chung, Woong Youn; Park, Cheong Soo
Purpose With the increasing incidence of papillary thyroid microcarcinoma (PTMC), familial papillary thyroid microcarcinoma (FPTMC) is now recognized more frequently. However, the biological behavior of FPTMC is poorly understood. The aim of this study was to investigate the prevalence of FPTMC and its biological aggressiveness. Methods Between March 2006 and July 2010, 2,414 patients underwent primary surgical therapy for PTMC and 149 (6.2%) were further classified as FPTMC. To determine the biological aggressiveness of FPTMC, we compared the clinicopathological features and prognosis between FPTMC and sporadic PTMC (SPTMC). Results The male-to-female ratio was higher in FPTMC than in sporadic papillary thyroid microcarcinoma (SPTMC: 1:4.5 vs. 1:7.2, P = 0.041). The central lymph node (LN) metastasis rate was significantly higher in FPTMC than in SPTMC (36.2% vs. 24.2%, P = 0.002). The local recurrence rate was also higher in FPTMC than in SPTMC (4.5% vs. 0.6%, P < 0.001). We identified familial occurrence in 6.2% of cases of PTMC. FPTMC is associated with a high rate of central LN metastasis and local recurrence. Conclusion These findings suggest that close follow-up can be beneficial in FPTMC patients to detect local recurrence. PMID:28289666
Pozza, Carlotta; Graziadio, Chiara; Giannetta, Elisa; Lenzi, Andrea; Isidori, Andrea M.
Cushing's syndrome (CS) is a rare but severe clinical condition represented by an excessive endogenous cortisol secretion and hence excess circulating free cortisol, characterized by loss of the normal feedback regulation and circadian rhythm of the hypothalamic-pituitary axis due to inappropriate secretion of ACTH from a pituitary tumor (Cushing's disease, CD) or an ectopic source (ectopic ACTH secretion, EAS). The remaining causes (20%) are ACTH independent. As soon as the diagnosis is established, the therapeutic goal is the removal of the tumor. Whenever surgery is not curative, management of patients with CS requires a major effort to control hypercortisolemia and associated symptoms. A multidisciplinary approach that includes endocrinologists, neurosurgeons, oncologists, and radiotherapists should be adopted. This paper will focus on traditional and novel medical therapy for aggressive ACTH-dependent CS. Several drugs are able to reduce cortisol levels. Their mechanism of action involves blocking adrenal steroidogenesis (ketoconazole, metyrapone, aminoglutethimide, mitotane, etomidate) or inhibiting the peripheral action of cortisol through blocking its receptors (mifepristone “RU-486”). Other drugs include centrally acting agents (dopamine agonists, somatostatin receptor agonists, retinoic acid, peroxisome proliferator-activated receptor γ “PPAR-γ” ligands) and novel chemotherapeutic agents (temozolomide and tyrosine kinase inhibitors) which have a significant activity against aggressive pituitary or ectopic tumors. PMID:22934113
Brivio, Simone; Cadamuro, Massimiliano; Strazzabosco, Mario; Fabris, Luca
Cholangiocarcinoma (CCA) is a highly aggressive epithelial malignancy still carrying a dismal prognosis, owing to early lymph node metastatic dissemination and striking resistance to conventional chemotherapy. Although mechanisms underpinning CCA progression are still a conundrum, it is now increasingly recognized that the desmoplastic microenvironment developing in conjunction with biliary carcinogenesis, recently renamed tumor reactive stroma (TRS), behaves as a paramount tumor-promoting driver. Indeed, once being recruited, activated and dangerously co-opted by neoplastic cells, the cellular components of the TRS (myofibroblasts, macrophages, endothelial cells and mesenchymal stem cells) continuously rekindle malignancy by secreting a huge variety of soluble factors (cyto/chemokines, growth factors, morphogens and proteinases). Furthermore, these factors are long-term stored within an abnormally remodeled extracellular matrix (ECM), which in turn can deleteriously mold cancer cell behavior. In this review, we will highlight evidence for the active role played by reactive stromal cells (as well as by the TRS-associated ECM) in CCA progression, including an overview of the most relevant TRS-derived signals possibly fueling CCA cell aggressiveness. Hopefully, a deeper knowledge of the paracrine communications reciprocally exchanged between cancer and stromal cells will steer the development of innovative, combinatorial therapies, which can finally hinder the progression of CCA, as well as of other cancer types with abundant TRS, such as pancreatic and breast carcinomas.
Priday, Lee J.; Ireland, Carol A.; Chu, Simon; Kilcoyne, Jennifer; Mulligan, Caroline
Background Risk assessment instruments have become a preferred means for predicting future aggression, claiming to predict long-term aggression risk. Aims To investigate the predictive value over 12 months and 4 years of two commonly applied instruments (Historical, Clinical and Risk Management - 20 (HCR-20) and Violence Risk Appraisal Guide (VRAG)). Method Participants were adult male psychiatric patients detained in a high secure hospital. All had a diagnosis of personality disorder. The focus was on aggression in hospital. Results The actuarial risk assessment (VRAG) was generally performing better than the structured risk assessment (HCR-20), although neither approach performed particularly well overall. Any value in their predictive potential appeared focused on the longer time period under study (4 years) and was specific to certain types of aggression. Conclusions The value of these instruments for assessing aggression in hospital among patients with personality disorder in a high secure psychiatric setting is considered. Declaration of interest J.L.I., C.A.M. and J.K. are employed by the trust where the data were collected. Copyright and usage © The Royal College of Psychiatrists 2016. This is an open access article distributed under the terms of the Creative Commons Non-Commercial, No Derivatives (CC BY-NC-ND) licence. PMID:27703760
Rohlf, Helena; Krahé, Barbara; Busching, Robert
The current study examined the moderating effect of classroom aggression on the development of individual aggression and on the path from individual aggression to social rejection over time. The study included 1,284 elementary school children and consisted of two data waves 10months apart. At both time points, teachers assessed the children's physical and relational aggression and their social rejection status. Multi-level analyses revealed that the classroom level of relational aggression moderated the link between individual relational aggression at T1 and T2 (b=-0.18, 95% CI [-0.32, -0.05], p<.01) and the link between T1 relational aggression and T2 social rejection (b=-0.12, 95% CI [-0.23, -0.003], p<.01). Being in a classroom where relational aggression was prevalent increased relational aggression among children with a low level of relational aggression at T1. Furthermore, a high individual level of relational aggression predicted greater social rejection in classrooms with a low level of relational aggression. Children were mainly influenced by their same-gender peers. Boys as a group had a greater influence than girls on their peers of either gender in the domain of relational aggression, whereas girls as a group had a greater influence in the domain of physical aggression. The contributions of analyzing cross-level interaction to understanding the developmental patterns of aggression and social rejection in middle childhood are discussed.
Hosie, Julia; Gilbert, Flora; Simpson, Katrina; Daffern, Michael
This study examined the relationships between personality and aggression using the general aggression (GAM, Anderson and Bushman  Annual Review of Psychology, 53, 27-51) and five factor models (FFMs) (Costa and McCrae  Revised NEO Personality Inventory (NEO-PI-R) and NEO Five-Factor Inventory (NEO-FFI) professional manual. Odessa, FL: Psychological Assessment Resources). Specifically, it examined Ferguson and Dyck's (Ferguson and Dyck  Aggression and Violent Behavior, 17, 220-228) criticisms that the GAM has questionable validity in clinical populations and disproportionately focuses on aggression-related knowledge structures to the detriment of other inputs, specifically personality variables. Fifty-five male offenders attending a community forensic mental health service for pre-sentence psychiatric and/or psychological evaluation were assessed for aggressive script rehearsal, aggression-supportive normative beliefs, FFM personality traits, trait anger and past aggressive behavior. With regard to relationships between five factor variables and aggression, results suggested that only agreeableness and conscientiousness were related to aggression. However, these relationships were: (1) weak in comparison with those between script rehearsal, normative beliefs and trait anger with aggression and (2) were not significant predictors in hierarchical regression analysis when all of the significant univariate predictors, including GAM-specified variables were regressed onto life history of aggression; normative beliefs supporting aggression, aggressive script rehearsal, and trait anger were significantly related to aggression in this regression analysis. These results provide further support for the application of the GAM to aggressive populations.
Eichelman, B; Hartwig, A
General attempts have been made to catalog or categorize research literature on aggressive behavior. In the animal literature this category has been delineated by clearly observed and described patterns of behavior. These include offensive and defensive expressions in animals and the characterization of attack behaviors by typography into defensive and offensive. The human literature is considerably deficient in the description and categorization of human aggressive behavior. Current nosologies offer no utilitarian schema for characterizing violent behavior in clinical populations regarding the typography of the violence, its prediction, or guidance as to its treatment. The generation of databased nosologies may provide a mechanism for the development of research and clinically relevant nosologies based upon cluster analyses of treatment outcomes and behavioral characteristics. This strategy may provide a more effective approach for further research concerning clinical aggressive or destructive behaviors.
Lieber, A L
Data on five aggressive and/or violent human behaviors were examined by computer to determine whether a relationship exists between the lunar syndoic cycle and human aggression. Homicides, suicides, fatal traffic accidents, aggravated assaults and psychiatric emergency room visits occurring in Dade County, Florida all show lunar periodicities. Homicides and aggravated assaults demonstrate statistically significant clustering of cases around full moon. Psychiatric emergency room visits cluster around first quarter and shows a significantly decreased frequency around new and full moon. The suicide curve shows correlations with both aggravated assaults and fatal traffic accidents, suggesting a self-destructive component for each of these behaviors. The existence of a biological rhythm of human aggression which resonates with the lunar synodic cycle is postulated.
This study focused on verbal and physical aggression against nursing staff, in real time, by elderly patients. The aggressive incidents were recorded at the end of each shift when they were more likely to be accurately remembered. Before beginning the study, nursing staff were taught how to use the Modified Overt Aggression Scale (MOAS) to identify aggressive acts. High rates of verbal and physical aggression among the elderly were observed by nurses, and data show that 75% of nursing staff experienced aggression on their shift. They either experienced aggression themselves or observed aggression on every single shift; that is at least five violent incidents in a work-week. Even if one is not the target of aggression, such observation is associated with elevated levels of stress.
Rafaeli, Anat; Erez, Amir; Ravid, Shy; Derfler-Rozin, Rellie; Treister, Dorit Efrat; Scheyer, Ravit
In 4 experimental studies, we show that customer verbal aggression impaired the cognitive performance of the targets of this aggression. In Study 1, customers' verbal aggression reduced recall of customers' requests. Study 2 extended these findings by showing that customer verbal aggression impaired recognition memory and working memory among employees of a cellular communication provider. In Study 3, the ability to take another's perspective attenuated the negative effects of customer verbal aggression on participants' cognitive performance. Study 4 linked customer verbal aggression to quality of task performance, showing a particularly negative influence of aggressive requests delivered by high-status customers. Together, these studies suggest that the effects of even minor aggression from customers can strongly affect the immediate cognitive performance of customer service employees and reduce their task performance. The implications for research on aggression and for the practice of customer service are discussed.
Yarur, Andres J.; Strobel, Sebastian G.; Deshpande, Amar R.
Inflammatory bowel disease comprises a group of conditions characterized by idiopathic inflammation of the gastrointestinal tract. The natural course of disease can range from an indolent course with prolonged periods of remission to aggressive, incapacitating disease. Predicting which patients are more susceptible to developing severe disease is important, especially when choosing therapeutic agents and treatment strategies. This paper reviews current evidence on the main demographic, clinical, endoscopic, histologic, serologic, and genetic markers that predict aggressive inflammatory bowel disease. In ulcerative colitis, we considered disease to be aggressive when patients had a high relapse rate, need for admission and/or surgery, development of colon cancer, or extraintestinal manifestations. We defined aggressive Crohn's disease as having a high relapse rate, development of penetrating disease, need for repeat surgery, or multiple admissions for flares. In Crohn's disease, involvement of the upper gastrointestinal tract and ileum, penetrating disease, early age at diagnosis, smoking, extensive ulceration of the mucosa, high titers of serum antibodies, and mutations of the NOD2 gene are markers of aggressive disease. In ulcerative colitis, patients with more extensive involvement of the colon (pancolitis) have more symptomatology and are at higher risk for needing a colectomy and developing colon cancer. Also, plasmocytic infiltration of the colonic mucosa and crypt atrophy predict treatment failure. As with diagnosis, no single method can predict disease aggressiveness. Multiple serologic and genetic tests are being developed to refine the accuracy of prediction. Endoscopic findings can also predict the future course of disease. At present, clinical manifestations are the most useful way to make therapeutic decisions. PMID:22298958
Riva, Paolo; Gabbiadini, Alessandro; Romero Lauro, Leonor J; Andrighetto, Luca; Volpato, Chiara; Bushman, Brad J
Research has shown that exposure to violent media increases aggression. However, the neural underpinnings of violent-media-related aggression are poorly understood. Additionally, few experiments have tested hypotheses concerning how to reduce violent-media-related aggression. In this experiment, we focused on a brain area involved in the regulation of aggressive impulses-the right ventrolateral prefrontal cortex (rVLPFC). We tested the hypothesis that brain polarization through anodal transcranial direct current stimulation (tDCS) over rVLPFC reduces aggression related to violent video games. Participants (N = 79) were randomly assigned to play a violent or a nonviolent video game while receiving anodal or sham stimulation. Afterward, participants aggressed against an ostensible partner using the Taylor aggression paradigm (Taylor Journal of Personality, 35, 297-310, 1967), which measures both unprovoked and provoked aggression. Among those who received sham stimulation, unprovoked aggression was significantly higher for violent-game players than for nonviolent-game players. Among those who received anodal stimulation, unprovoked aggression did not differ for violent- and nonviolent-game players. Thus, anodal stimulation reduced unprovoked aggression in violent-game players. No significant effects were found for provoked aggression, suggesting tit-for-tat responding. This experiment sheds light on one possible neural underpinning of violent-media-related aggression-the rVLPFC, a brain area involved in regulating negative feelings and aggressive impulses.
Bailly, Matthew D; King, Alan R
Modest alcohol and aggressive trait effects on laboratory-induced aggression among men have been reported with some consistency in the literature. Relationships between aggressive personality traits and laboratory-induced aggression appear to become less consistent under the influence of alcohol. Several research teams have found suggestions that the effects of alcohol on laboratory aggression may be reduced or even reversed among individuals with aggressive personality traits. This study examined the effects of alcohol on the aggressive responding on the Point Subtraction Aggression Paradigm (PSAP) of eight undergraduate men who generated evidence on the Million Clinical Multiaxial Inventory-II (MCMI-II) of sadistic-aggressive personality disorder features. This sample was compared with a group of 18 undergraduate male peers without MCMI-II elevations described in a previous study. Neither alcohol ingestion (0.8 ml/kg) nor aggressive personality traits predicted laboratory behavior in isolation, but alcohol was found to selectively attenuate (d = 0.75) PSAP responding for the sadistic-aggressive as opposed to the control subjects (i.e., a significant aggressive trait by alcohol interaction). The possible value of this counterintuitive response tendency in identifying men at elevated risk for alcohol-related aggression was discussed. Large, immediate reductions in laboratory-based aggressive responding while under the influence of alcohol might provide a paradoxical high risk indicator that has not been previously identified.
von der Pahlen, Bettina
The association between alcohol and aggressive behavior is well established although a direct causal relationship has proven hard to demonstrate. There are, however, indications that alcohol facilitates aggression in individuals who already have a predisposition to behave aggressively. Aggressive personality disorders have in turn been explained by elevated testosterone level. A one-to-one relation between increased levels of testosterone and aggression has been, nevertheless, difficult to reveal. Two metabolites of testosterone, estradiol and 5alpha-dihydrotestosterone (DHT), have been studied much less in human aggressive behavior. Estradiol might reduce androgenic effects and have a counterbalancing influence on aggression. DHT, again, has a much higher affinity than testosterone to androgen receptors, and there are indications that some of the effects of testosterone-mediating aggressive behavior occur after aromatization. Disregard of seasonal and circadian fluctuations in male testosterone production might be responsible for some of the inconclusive testosterone-aggression results. In addition, increasing age decreases both aggressive behavior and testosterone production in males. Cortisol has yielded conflicting results as a mediator in aggressive behavior. Both higher and lower levels have been reported in aggressive and abusive men. Finally, the acute and chronic effects of alcohol influence the steroid hormone levels in various ways. The present understanding of the etiology of aggression is still vague. It is clear that a multidimensional approach, combining both biological and psychosocial factors, will be necessary for the development of a more general concept of human aggression in the future.
Lehmann, Waltraut; Mossmann, Dirk; Kleemann, Julia; Mock, Kerstin; Meisinger, Chris; Brummer, Tilman; Herr, Ricarda; Brabletz, Simone; Stemmler, Marc P; Brabletz, Thomas
Early dissemination, metastasis and therapy resistance are central hallmarks of aggressive cancer types and the leading cause of cancer-associated deaths. The EMT-inducing transcriptional repressor ZEB1 is a crucial stimulator of these processes, particularly by coupling the activation of cellular motility with stemness and survival properties. ZEB1 expression is associated with aggressive behaviour in many tumour types, but the potent effects cannot be solely explained by its proven function as a transcriptional repressor of epithelial genes. Here we describe a direct interaction of ZEB1 with the Hippo pathway effector YAP, but notably not with its paralogue TAZ. In consequence, ZEB1 switches its function to a transcriptional co-activator of a 'common ZEB1/YAP target gene set', thereby linking two pathways with similar cancer promoting effects. This gene set is a predictor of poor survival, therapy resistance and increased metastatic risk in breast cancer, indicating the clinical relevance of our findings.
Lehmann, Waltraut; Mossmann, Dirk; Kleemann, Julia; Mock, Kerstin; Meisinger, Chris; Brummer, Tilman; Herr, Ricarda; Brabletz, Simone; Stemmler, Marc P.; Brabletz, Thomas
Early dissemination, metastasis and therapy resistance are central hallmarks of aggressive cancer types and the leading cause of cancer-associated deaths. The EMT-inducing transcriptional repressor ZEB1 is a crucial stimulator of these processes, particularly by coupling the activation of cellular motility with stemness and survival properties. ZEB1 expression is associated with aggressive behaviour in many tumour types, but the potent effects cannot be solely explained by its proven function as a transcriptional repressor of epithelial genes. Here we describe a direct interaction of ZEB1 with the Hippo pathway effector YAP, but notably not with its paralogue TAZ. In consequence, ZEB1 switches its function to a transcriptional co-activator of a ‘common ZEB1/YAP target gene set', thereby linking two pathways with similar cancer promoting effects. This gene set is a predictor of poor survival, therapy resistance and increased metastatic risk in breast cancer, indicating the clinical relevance of our findings. PMID:26876920
Mock, D W
In Texas, great egret Casmerodius albus chicks attack younger nestmates, often fatally (siblicide). By contrast, the young of neighboring great blue herons Ardea herodias seldom strike or kill siblings. These interspecific differences seem related to prey size: only fish provided by egret parents are small enough for chicks to monopolize (a process facilitated by aggression). Experimentally cross-fostered heron chicks raised on small prey by egret parents became siblicidal, but the reverse procedure of cross-fostering egret chicks did not reduce aggression or siblicide.
Schrock, Wesley B; Wetzel, Raun J; Tanner, Stephanie C; Khan, Majid A
Vertebral hemangiomas are common lesions and usually considered benign. A rare subset of them, however, are characterized by extra-osseous extension, bone expansion, disturbance of blood flow, and occasionally compression fractures and thereby referred to as aggressive hemangiomas. We present a case of a 67-year-old woman with progressive paraplegia and an infiltrative mass of T4 vertebra causing mass effect on the spinal cord. Multiple conventional imaging modalities were utilized to suggest the diagnosis of aggressive hemangioma. Final pathologic diagnosis after decompressive surgery confirmed the diagnosis of an osseous hemangioma.
Hernández Olmedo, Miguel; Suárez Fernández, Carmen
Atrial fibrillation is currently a very prevalent disease and it represents one of the most common causes of disabling stroke. Antithrombotic therapies have reduced the incidence of this complication although they pose many limitations and difficulties. As a result, a large number of high risk patients do not receive an appropriate treatment. In recent years, four new oral anticoagulants (NOAC) with relevant advantages in comparison to vitaminK antagonists have been released. Four large phaseiii clinical trials have demonstrated that NOAC are at least as safe and efficacious as warfarin in stroke prevention in non-valve atrial fibrillation patients with moderate-high thrombotic risk, being their main advantage the reduction in intracranial hemorrhage. The arrival of these drugs has caused great expectations in the management of these patients but also new doubts. Lacking data in some subgroups of frail patients, the absence of specific antidotes available and specially their high cost represent nowadays the main limitations for their generalization.
Smagin, D A; Bondar', N P; Kudriavtseva, N N
Sector of Social Behavior Neurogenetics, Institute of Cytology and Genetics, Siberian Branch, Effects of sodium valproate on the aggressive behavior of male mice with 2- and 20-day positive fighting experience have been studied. It is established that valproate administered in a singe dose of 100 mg/kg has no effect on the behavior of male mice with a 2-day experience of aggression. The treatment of mice with 300 mg/kg of valproate significantly decreased the level of aggressive motivation and the percentage of animals demonstrating attacks and threats. In male mice with a 20-day experience of aggression, valproate decreased the time of hostile behavior in a dose-dependent manner. Valproate in a single dose of 300 mg/kg significantly decreased the level of aggressive motivation, but also produced a toxic effect, whereby 73% of aggressive males demonstrated long-term immobility and 45% exhibited movement abnormalities (falls) upon the treatment. It is suggested that changes in the brain neurochemical activity, which are caused by a prolonged experience of aggression, modify the effects of sodium valproate.
Metgud, Renuka; Kumar, Ajay; Bhat, Kishore
Oro-facial clefts are one of the most common birth defects and may be associated with other genetic anomalies. Aggressive periodontitis is a rare condition that progresses rapidly, but affects only a small percentage of the population. Most of the cases of aggressive periodontitis are familial. Even though, literature has documented the association of various genetic disorders with aggressive periodontitis, the aggressive periodontitis in patients with isolated cleft lip (CL) have never been addressed. Here, we report a rare case of isolated CL with generalized aggressive periodontitis. The concomitant presentation of isolated CL with aggressive periodontitis in an individual has clinical significance for multi-disciplinary care. PMID:25810600
Kempes, M; de Vries, H; Matthys, W; van Engeland, H; van Hooff, J
Various researchers distinguished two categories of aggressive behaviour, namely reactive and proactive aggression. Reactive aggression is an aggressive response to a perceived threat or provocation, whereas proactive aggression is behaviour that anticipates a reward. In the present study, including both a sample of disruptive behaviour disordered (DBD) and normal control (NC) children, we observed reactive and proactive aggressive behaviour during an experimental dyadic play session. DBD children showed more observed reactive and proactive aggression. Subsequently, we investigated whether the observed measures correlated with parent-rated measures of reactive and proactive aggression in. We distinguished in both NC and DBD children a subgroup showing a rise in cortisol level, i.e. responders, and a subgroup who did not show a rise in cortisol, i.e. non-responders. Results suggest that differences in the cortisol response affects the correspondence between observed and parent-rated reactive and proactive aggression since only DBD non-responders showed the expected correlations.
Zhang, Wensheng; Kale, Shubha P.; McFerrin, Harris; Davenport, Ian; Wang, Guangdi; Skripnikova, Elena; Li, Xiao-Lin; Bowen, Nathan J.; McDaniels, Leticia B; Meng, Yuan-Xiang; Polk, Paula; Liu, Yong-Yu; Zhang, Qian-Jin
Patients with advanced epithelial ovarian cancer often experience disease recurrence after standard therapies, a critical factor in determining their five-year survival rate. Recent reports indicated that long-term or short-term survival is associated with varied gene expression of cancer cells. Thus, identification of novel prognostic biomarkers should be considered. Since the mouse genome is similar to the human genome, we explored potential prognostic biomarkers using two groups of mouse ovarian cancer cell lines (group 1: IG-10, IG-10pw, and IG-10pw/agar; group 2: IG-10 clones 2, 3, and 11) which display highly and moderately aggressive phenotypes in vivo. Mice injected with these cell lines have different survival time and rates, capacities of tumor, and ascites formations, reflecting different prognostic potentials. Using an Affymetrix Mouse Genome 430 2.0 Array, a total of 181 genes were differentially expressed (P<0.01) by at least twofold between two groups of the cell lines. Of the 181 genes, 109 and 72 genes were overexpressed in highly and moderately aggressive cell lines, respectively. Analysis of the 109 and 72 genes using Ingenuity Pathway Analysis (IPA) tool revealed two cancer-related gene networks. One was associated with the highly aggressive cell lines and affiliated with MYC gene, and another was associated with the moderately aggressive cell lines and affiliated with the androgen receptor (AR). Finally, the gene enrichment analysis indicated that the overexpressed 89 genes (out of 109 genes) in highly aggressive cell lines had a function annotation in the David database. The cancer-relevant significant gene ontology (GO) terms included Cell cycle, DNA metabolic process, and Programmed cell death. None of the genes from a set of the 72 genes overexpressed in the moderately aggressive cell lines had a function annotation in the David database. Our results suggested that the overexpressed MYC and 109 gene set represented highly aggressive ovarian