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Antithrombotic

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https://www.readbyqxmd.com/read/28729433/selective-factor-viii-activation-by-the-tissue-factor-factor-viia-factor-xa-complex
#1
Yuichi Kamikubo, G Loredana Mendolicchio, Antonella Zampolli, Patrizia Marchese, Andrea S Rothmeier, Jennifer Nagrampa Orje, Andrew J Gale, Sriram Krishnaswamy, András Gruber, Henrik Østergaard, Lars C Petersen, Wolfram Ruf, Zaverio M Ruggeri
Safe and effective antithrombotic therapy requires understanding of mechanisms that contribute to pathological thrombosis but have lesser impact on hemostasis. We found that the extrinsic tissue factor (TF) coagulation initiation complex can selectively activate the anti-hemophilic cofactor, FVIII, triggering the hemostatic intrinsic coagulation pathway independently of thrombin feedback loops. In a mouse model with a relatively mild thrombogenic lesion, TF-dependent FVIII activation sets the threshold for thrombus formation through contact phase-generated FIXa...
July 20, 2017: Blood
https://www.readbyqxmd.com/read/28724590/long-term-antithrombotic-treatment-in-intracranial-hemorrhage-survivors-with-atrial-fibrillation
#2
Eleni Korompoki, Filippos T Filippidis, Peter B Nielsen, Angela Del Giudice, Gregory Y H Lip, Joji B Kuramatsu, Hagen B Huttner, Jiming Fang, Sam Schulman, Joan Martí-Fàbregas, Celine S Gathier, Anand Viswanathan, Alessandro Biffi, Daniela Poli, Christian Weimar, Uwe Malzahn, Peter Heuschmann, Roland Veltkamp
OBJECTIVE: To perform a systematic review and meta-analysis of studies reporting recurrent intracranial hemorrhage (ICH) and ischemic stroke (IS) in ICH survivors with atrial fibrillation (AF) during long-term follow-up. METHODS: A comprehensive literature search including MEDLINE, EMBASE, Cochrane library, clinical trials registry was performed following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. We considered studies capturing outcome events (ICH recurrence and IS) for ≥3 months and treatment exposure to vitamin K antagonists (VKAs), antiplatelet agents (APAs), or no antithrombotic medication (no-ATM)...
July 19, 2017: Neurology
https://www.readbyqxmd.com/read/28724563/management-of-anticoagulant-and-antiplatelet-therapy-in-patients-undergoing-interventional-pulmonary-procedures
#3
REVIEW
Vikas Pathak, J Erin Allender, Mollie W Grant
There has been great progress in antithrombotic therapy over the past several years. Its use has increased with the advent of novel anticoagulants, as these medications do not require frequent blood tests for monitoring. Antithrombotic therapy is aimed at reducing the risk of thromboembolic events in patients with atrial fibrillation, coronary artery disease, deep vein thrombosis, valvular heart disease and pulmonary embolism. These patients are often critically ill and frequently undergo urgent interventions requiring discontinuation of anticoagulant or antiplatelet therapy which can increase the risk of thrombosis; however, continuing these agents can lead to increased risk of haemorrhage...
September 30, 2017: European Respiratory Review: An Official Journal of the European Respiratory Society
https://www.readbyqxmd.com/read/28724561/management-of-antithrombotic-agents-in-patients-undergoing-flexible-bronchoscopy
#4
REVIEW
Sami Abuqayyas, Shine Raju, John R Bartholomew, Roulan Abu Hweij, Atul C Mehta
Bleeding is one of the most feared complications of flexible bronchoscopy. Although infrequent, it can be catastrophic and result in fatal outcomes. Compared to other endoscopic procedures, the risk of morbidity and mortality from the bleeding is increased, as even a small amount of blood can fill the tracheobronchial tree and lead to respiratory failure. Patients using antithrombotic agents (ATAs) have higher bleeding risk. A thorough understanding of the different ATAs is critical to manage patients during the peri-procedural period...
September 30, 2017: European Respiratory Review: An Official Journal of the European Respiratory Society
https://www.readbyqxmd.com/read/28724321/diospyros-kaki-calyx-inhibits-immediate-type-hypersensitivity-via-the-reduction-of-mast-cell-activation
#5
Min-Jong Kim, Hae Ran Park, Tae-Yong Shin, Sang-Hyun Kim
CONTEXT: Diospyros kaki L. (Ebenaceae) fruit is widely distributed in Asia and is known to exert anti-inflammatory and antithrombotic effects. OBJECTIVE: We evaluated the inhibitory effect of aqueous extract of D. kaki calyx (AEDKC) on mast cell-mediated immediate-type hypersensitivity and underlying mechanism of action. MATERIALS AND METHODS: For in vivo, ovalbumin (OVA)-induced active systemic anaphylaxis (ASA) and immunoglobulin (Ig) E-mediated passive cutaneous anaphylaxis (PCA) models were used...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28722151/the-antithrombotic-and-haemostatic-effects-of-lassbio-752-a-synthetic-orally-active-compound-in-an-arterial-and-venous-thrombosis-model-in-rats
#6
Flávia S Frattani, Lidia M Lima, Eliezer J Barreiro, Russolina B Zingali
OBJECTIVES: In this work, we further investigated the effect of the compound LASSBio-752 in thrombosis models in rats. METHODS: Arterial and venous thrombosis model, ex-vivo recalcification time and aPTT and PT. KEY FINDINGS: In the venous thrombosis model, oral administration of LASSBio-752 [48.2 mg (100 μmol)/kg] one hour before the thrombus induction decreased thrombus weight by 37 ± 0.2%. Interestingly, the antithrombotic action of this compound [48...
July 19, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28720315/-evaluation-of-the-antithrombotic-strategy-in-low-thrombotic-risk-patients-who-underwent-aortic-valve-replacement-wth-bioprosthesis
#7
Eduardo Aceves-Velázquez, Gerardo Vieyra-Herrera, Laura Rodríguez-Chávez, Valentín Herrera-Alarcón
According to current guidelines, in patients without additional risk factors who underwent aortic valve replacement with a bioprosthesis, anticoagulation in the first 3 months after surgery is still a matter of debate. According to current evidence, aspirin in low doses is a reasonable alternative to vitamin K antagonists (VKA). We compared the incidence of thrombotic and hemorrhagic complications in patients with low thrombotic risk who underwent aortic valve replacement with a bioprosthesis in the National Institute of Cardiology of Ignacio Chávez of Mexico...
July 15, 2017: Archivos de Cardiología de México
https://www.readbyqxmd.com/read/28716584/p-wave-terminal-force-in-lead-v1-predicts-paroxysmal-atrial-fibrillation-in-acute-ischemic-stroke
#8
Toshiaki Goda, Yukio Sugiyama, Nobuyuki Ohara, Takeshi Ikegami, Kotaro Watanabe, Junya Kobayashi, Daisuke Takahashi
BACKGROUND: Detection of paroxysmal atrial fibrillation (PAF) in cryptogenic stroke is critical to selecting an antithrombotic therapy for preventing recurrent stroke. However, the predictor of PAF in patients with acute ischemic stroke is not well elucidated. P-wave terminal force in lead V1 (PTFV1) is a standard electrocardiogram marker of left atrial abnormality. In this study, we aimed to investigate the utility of PTFV1 for the prediction of PAF in patients with acute ischemic stroke...
July 14, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28706123/cerebral-microbleeds-in-murine-amyloid-angiopathy-natural-course-and-anticoagulant-effects
#9
Marilena Marinescu, Li Sun, Marc Fatar, Andreas Neubauer, Lothar Schad, Joanne van Ryn, Lorenz Lehmann, Roland Veltkamp
BACKGROUND AND PURPOSE: Cerebral microbleeds (CMBs) predispose patients to intracerebral hemorrhage. Preclinical models to examine the effects of antithrombotic treatments on the development of clinically overt intracerebral hemorrhage are needed. We examined the natural course of CMB development and the effects of long-term anticoagulation with warfarin or dabigatran on cerebral micro- and macrohemorrhage in mice overexpressing the APP23 (amyloid precursor protein). METHODS: Repeated susceptibility-weighted magnetic resonance imaging was performed in APP23 mice at the age of 18 and 21 months, respectively...
July 13, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28706114/one-year-incidence-time-trends-and-predictors-of-recurrent-ischemic-stroke-in-sweden-from-1998-to-2010-an-observational-study
#10
Lisa Bergström, Anna-Lotta Irewall, Lars Söderström, Joachim Ögren, Katarina Laurell, Thomas Mooe
BACKGROUND AND PURPOSE: Recent data on the incidence, time trends, and predictors of recurrent ischemic stroke are limited for unselected patient populations. METHODS: Data for ischemic stroke patients were obtained from The Swedish Stroke Register (Riksstroke) between 1998 and 2009 and merged with The Swedish National Inpatient Register. A reference group of patients was created by Statistics Sweden. The ischemic stroke patient cohort was divided into 4 time periods...
July 13, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28700965/inhibitory-effects-of-asp6537-a-selective-cyclooxygenase-1-inhibitor-on-thrombosis-and-neointima-formation-in-rats
#11
Chinatsu Sakata, Tomihisa Kawasaki, Yoshiyuki Iwatsuki, Yumiko Moritani, Yoshiaki Morita, Hideaki Hara
INTRODUCTION: Percutaneous coronary interventions (PCIs), such as balloon angioplasty and stent placement, are effective in the treatment of coronary artery disease. PCI has drawbacks, however, including acute thrombosis after the procedure and restenosis of the vascular lumen due to abnormal neointimal hyperplasia. ASP6537 is a selective COX-1 inhibitor that has been investigated as a possible candidate for clinical development as an antiplatelet agent. In the present study, we evaluated the in vivo antithrombotic effect of ASP6537 and its effect on neointima formation after balloon angioplasty...
July 2, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28696019/postoperative-bleeding-risk-after-gastric-endoscopic-submucosal-dissection-during-antithrombotic-drug-therapy
#12
Yoshiyasu Kono, Yuka Obayashi, Yuki Baba, Hiroyuki Sakae, Tatsuhiro Gotoda, Ko Miura, Hiromitsu Kanzaki, Masaya Iwamuro, Seiji Kawano, Yoshiro Kawahara, Takehiro Tanaka, Hiroyuki Okada
BACKGROUND AND AIM: The safety of gastric endoscopic submucosal dissection (ESD) in the antithrombotic drug users remains controversial. METHODS: Patients who underwent gastric ESD at Okayama university hospital between March 2006 and February 2016 were enrolled. We investigated the risk of post-ESD bleeding according to the management of the antithrombotic drugs. RESULTS: One thousand twenty lesions (872 patients) were enrolled. In a multivariate analysis, heparin replacement (HR) (Odds ratio [OR] 5...
July 11, 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28694452/phosphatidylserine-mediated-platelet-clearance-by-endothelium-decreases-platelet-aggregates-and-procoagulant-activity-in-sepsis
#13
Ruishuang Ma, Rui Xie, Chengyuan Yu, Yu Si, Xiaoming Wu, Lu Zhao, Zhipeng Yao, Shaohong Fang, He Chen, Valerie Novakovic, Chunyan Gao, Junjie Kou, Yayan Bi, Hemant S Thatte, Bo Yu, Shufen Yang, Jin Zhou, Jialan Shi
The mechanisms that eliminate activated platelets in inflammation-induced disseminated intravascular coagulation (DIC) in micro-capillary circulation are poorly understood. This study explored an alternate pathway for platelet disposal mediated by endothelial cells (ECs) through phosphatidylserine (PS) and examined the effect of platelet clearance on procoagulant activity (PCA) in sepsis. Platelets in septic patients demonstrated increased levels of surface activation markers and apoptotic vesicle formation, and also formed aggregates with leukocytes...
July 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28694021/recombinant-and-chemo-bio-orthogonal-synthesis-of-liposomal-thrombomodulin-and-its-antithrombotic-activity
#14
Lin Wang, Rui Jiang, Yang Liu, Maosheng Cheng, Qingyu Wu, Xue-Long Sun
Thrombomodulin (TM) is an endothelial cell membrane protein that acts as a major cofactor in the protein C anticoagulant pathway. The EGF-like domains 4-6 of TM (TM456) are essential for PC activation. In this study, we proposed a liposomal recombinant TM conjugate to mimic the membrane TM structure and its anticoagulant activity. First, a DSPE-PEG2000-TM456 was successfully synthesized by site-specific conjugation of azido-TM456 with DSPE-PEG2000-DBCO via copper-free click chemistry quantitatively. Then, liposome-TM456 was fabricated via direct liposome formation with the DSPE-PEG2000-TM456 and other lipids...
July 7, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28692742/vitamin-k-antagonists-with-or-without-long-term-antiplatelet-therapy-in-outpatients-with-stable-coronary-artery-disease-and-atrial-fibrillation-association-with-ischemic-and-bleeding-events
#15
Gilles Lemesle, Gregory Ducrocq, Yedid Elbez, Eric Van Belle, Shinya Goto, Christopher P Cannon, Christophe Bauters, Deepak L Bhatt, Philippe Gabriel Steg
BACKGROUND: It remains uncertain whether patients with atrial fibrillation (AF) requiring long-term oral anticoagulation (OAC) and with stable coronary artery disease (CAD) should receive antiplatelet therapy (APT) in addition to OAC. HYPOTHESIS: APT in addition to OAC would be more effective than OAC alone in preventing ischaemic events in such patients. METHODS: In the international REduction of Atherothrombosis for Continued Health (REACH) Registry including 68 236 outpatients with or at risk for atherothrombosis, we identified 2347 patients with stable CAD and AF receiving vitamin K antagonists (VKA)...
July 10, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28691050/evaluation-of-the-bleeding-risk-with-various-antithrombotic-therapies-after-gastric-endoscopic-submucosal-dissection
#16
Tatsuhiro Gotoda, Keisuke Hori, Masaya Iwamuro, Yoshiyasu Kono, Kou Miura, Hiromitsu Kanzaki, Seiji Kawano, Yoshiro Kawahara, Hiroyuki Okada
BACKGROUND AND STUDY AIMS : Patients receiving antithrombotic drugs have a higher risk of postoperative bleeding and thromboembolic events related to endoscopic procedures. The aim of this study was to evaluate the relationship between various antithrombotic therapies and bleeding after gastric endoscopic submucosal dissection (ESD) (post-ESD bleeding). PATIENTS AND METHODS:  Among 529 consecutive gastric ESD procedures (483 patients with 579 legions), 100 patients with 121 lesions who underwent 108 procedures were on antithrombotic therapy (group A) and 382 patients with 458 lesions who underwent 421 procedures were not on antithrombotic therapy (group B)...
July 2017: Endoscopy International Open
https://www.readbyqxmd.com/read/28688063/spinal-cord-infarcts-risk-factors-management-and-prognosis
#17
REVIEW
Deena M Nasr, Alejandro Rabinstein
There are no standard guidelines for treatment of spinal cord ischemia due to how rare it is and the diverse etiology and presentations involved. In addition, to date, there have been no large clinical trials examining ideal pharmacologic treatment options for spinal cord infarct. In our practice, we rely on hemodynamic augmentation initiated as soon as possible. Otherwise, treatment is usually geared towards the etiology of spinal cord ischemia. For instance, spinal cord ischemia occurring after aortic aneurysmal repair may improve with CSF drainage through a lumbar catheter in the periprocedural setting...
August 2017: Current Treatment Options in Neurology
https://www.readbyqxmd.com/read/28686155/paediatric-venous-thromboembolism-a-report-from-the-italian-registry-of-thrombosis-in-children-riti
#18
Paola Giordano, Massimo Grassi, Paola Saracco, Angelo C Molinari, Chiara Gentilomo, Agnese Suppiej, Giuseppe Indolfi, Donatella Lasagni, Matteo Luciani, Fiammetta Piersigilli, Maria C Putti, Lidia L Rota, Stefano Sartori, Paolo Simioni
BACKGROUND: The Italian Registry of Thrombosis in Children (RITI) was established by a multidisciplinary team with the aims of improving knowledge about neonatal and paediatric thrombotic events in Italy and providing a preliminary source of data for the future development of specific clinical trials and diagnostic-therapeutic protocols. MATERIALS AND METHODS: We analysed the subset of RITI data concerning paediatric systemic venous thromboembolic events that occurred between January 2007 and June 2013...
June 30, 2017: Blood Transfusion, Trasfusione del Sangue
https://www.readbyqxmd.com/read/28684123/aspirin-and-blood-pressure-effects-when-used-alone-or-in-combination-with-antihypertensive-drugs
#19
REVIEW
Ana Catarina Costa, Marta Reina-Couto, António Albino-Teixeira, Teresa Sousa
Arterial hypertension is a major risk factor for cardiovascular and renal events. Lowering blood pressure is thus an important strategy for reducing morbidity and mortality. Since low-dose aspirin is a cornerstone in the prevention of adverse cardiovascular outcomes, combined treatment with aspirin and antihypertensive drugs is very common. However, the impact of aspirin therapy on blood pressure control remains a subject of intense debate. Recent data suggest that the cardioprotective action of aspirin extends beyond its well-known antithrombotic effect...
July 3, 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/28681581/risk-analysis-of-new-oral-anticoagulants-for-gastrointestinal-bleeding-and-intracranial-hemorrhage-in-atrial-fibrillation-patients-a-systematic-review-and-network-meta-analysis
#20
Wei-Wei Xu, Shen-Jiang Hu, Tao Wu
BACKGROUND: Antithrombotic therapy using new oral anticoagulants (NOACs) in patients with atrial fibrillation (AF) has been generally shown to have a favorable risk-benefit profile. Since there has been dispute about the risks of gastrointestinal bleeding (GIB) and intracranial hemorrhage (ICH), we sought to conduct a systematic review and network meta-analysis using Bayesian inference to analyze the risks of GIB and ICH in AF patients taking NOACs. METHODS: We analyzed data from 20 randomized controlled trials of 91 671 AF patients receiving anticoagulants, antiplatelet drugs, or placebo...
July 2017: Journal of Zhejiang University. Science. B
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