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https://www.readbyqxmd.com/read/28326589/risk-of-myocardial-infarction-in-patients-with-atrial-fibrillation-using-vitamin-k-antagonists-aspirin-or-direct-acting-oral-anticoagulants
#1
Leo M Stolk, Frank de Vries, Chiel Ebbelaar, Anthonius de Boer, Tom Schalekamp, Patrick Souverein, Arina Ten Cate-Hoek, Andrea M Burden
AIM: Direct-acting oral anticoagulants (DOACs) have become available for the prevention of stroke in patients with atrial fibrillation (AF). Conflicting results have been published on the risk of acute myocardial infarction (AMI) with the use of DOACs in comparison with vitamin K antagonists (VKAs). The objective of the present study was to evaluate the risk of AMI in patients with AF who are exposed to either VKAs, DOACs or low-dose (< 325 mg) aspirin. METHODS: We conducted a population-based cohort study using data from the Clinical Practice Research Datalink (2008-2014)...
March 22, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28320981/relationship-between-thromboelastography-and-long-term-ischemic-events-as-gauged-by-the-response-to-clopidogrel-in-patients-undergoing-elective-percutaneous-coronary-intervention
#2
Xumin Hou, Wenzheng Han, Qian Gan, Yuan Liu, Weiyi Fang
Ischemic events after percutaneous coronary intervention (PCI) remain a major concern for patients with coronary heart disease (CHD). The aim of the current study was to investigate whether thromboelastography (TEG) was a satisfactory technique to measure platelet function in vitro in order to improve risk stratification and the individual response to antiplatelet therapy. The diagnostic and prognostic utility of the maximum amplitude of adenosine diphosphate induced platelet-fibrin clots (MAADP) was measured with TEG in 759 patients undergoing elective PCI...
March 19, 2017: Bioscience Trends
https://www.readbyqxmd.com/read/28293429/influence-of-nonsteroidal-anti-inflammatory-drugs-on-aspirin-s-antiplatelet-effects-and-suggestion-of-the-most-suitable-time-for-administration-of-both-agents-without-resulting-in-interaction
#3
Kenta Shibata, Yuuki Akagi, Naofumi Nozawa, Hitoshi Shimomura, Takao Aoyama
BACKGROUND: Low-dose aspirin irreversibly inhibits platelet cyclooxygenase-1 (COX-1) and suppresses platelet aggregation. It is effective for secondary prevention of cardiovascular events. Because nonsteroidal anti-inflammatory drugs (NSAIDs) reversibly bind with COX-1, the antiplatelet effects of aspirin may be suppressed when NSAIDs are co-administered. This interaction could be avoided by avoiding simultaneous administration; however, the minimum interval that should separate the administration of aspirin and loxoprofen is not well known...
2017: Journal of Pharmaceutical Health Care and Sciences
https://www.readbyqxmd.com/read/28290994/derivation-and-validation-of-the-predicting-bleeding-complications-in-patients-undergoing-stent-implantation-and-subsequent-dual-antiplatelet-therapy-precise-dapt-score-a-pooled-analysis-of-individual-patient-datasets-from-clinical-trials
#4
Francesco Costa, David van Klaveren, Stefan James, Dik Heg, Lorenz Räber, Fausto Feres, Thomas Pilgrim, Myeong-Ki Hong, Hyo-Soo Kim, Antonio Colombo, Philippe Gabriel Steg, Thomas Zanchin, Tullio Palmerini, Lars Wallentin, Deepak L Bhatt, Gregg W Stone, Stephan Windecker, Ewout W Steyerberg, Marco Valgimigli
BACKGROUND: Dual antiplatelet therapy (DAPT) with aspirin plus a P2Y12 inhibitor prevents ischaemic events after coronary stenting, but increases bleeding. Guidelines support weighting bleeding risk before the selection of treatment duration, but no standardised tool exists for this purpose. METHODS: A total of 14 963 patients treated with DAPT after coronary stenting-largely consisting of aspirin and clopidogrel and without indication to oral anticoagulation-were pooled at a single-patient level from eight multicentre randomised clinical trials with independent adjudication of events...
March 11, 2017: Lancet
https://www.readbyqxmd.com/read/28289237/impact-of-glycemic-control-on-efficacy-of-clopidogrel-in-transient-ischemic-attack-or-minor-stroke-patients-with-cyp2c19-genetic-variants
#5
Yi Lin, Anxin Wang, Jiejie Li, Jinxi Lin, David Wang, Xia Meng, Lixian Ou, Weiqi Chen, Xingquan Zhao, Liping Liu, Yilong Wang, Yongjun Wang
BACKGROUND AND PURPOSE: Dysglycemia may influence the predictive value of CYP2C19 loss-of-function allele for clinical efficacy of antiplatelet drug, but the role of glycated albumin (GA) remains unclear in patients with stroke on antiplatelet drugs. METHODS: The CHANCE trial (Clopidogrel in High-Risk Patients With Acute Nondisabling Cerebrovascular Events) included 2933 patients who had GA levels and CYP2C19 genotyping. Cox proportional hazards model was used to assess the interaction between CYP2C19 loss-of-function allele (*2, *3) carrier status and the effect of antiplatelet therapy based on their GA levels...
March 13, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28286156/clinical-characteristics-of-patients-with-chronic-rhinosinusitis-with-nasal-polyps-asthma-and-aspirin-exacerbated-respiratory-disease
#6
Whitney W Stevens, Anju T Peters, Annemarie G Hirsch, Cara M Nordberg, Brian S Schwartz, Dione G Mercer, Mahboobeh Mahdavinia, Leslie C Grammer, Kathryn E Hulse, Robert C Kern, Pedro Avila, Robert P Schleimer
BACKGROUND: Aspirin-exacerbated respiratory disease (AERD) comprises the triad of chronic rhinosinusitis with nasal polyps (CRSwNP), asthma, and intolerance to inhibitors of the cyclooxygenase-1 (COX-1) enzyme. The prevalence of AERD remains unclear, and few studies have compared the clinical characteristics of patients with AERD to those with CRSwNP alone, asthma alone, or both CRSwNP and asthma. OBJECTIVE: To determine the prevalence of AERD within a tertiary care setting, and to identify unique clinical features that could distinguish these patients from those with both CRSwNP and asthma or with CRSwNP alone...
March 9, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28279492/group-2-innate-lymphoid-cells-are-recruited-to-the-nasal-mucosa-in-patients-with-aspirin-exacerbated-respiratory-disease
#7
Jacqueline J Eastman, Kellen J Cavagnero, Adam S Deconde, Alex S Kim, Maya R Karta, David H Broide, Bruce L Zuraw, Andrew A White, Sandra C Christiansen, Taylor A Doherty
BACKGROUND: Aspirin-exacerbated respiratory disease (AERD) is characterized by tissue eosinophilia and mast cell activation, including abundant production of prostaglandin D2 (PGD2). Group 2 innate lymphoid cells (ILC2s), which promote tissue eosinophilia and mast cell responses, undergo chemotaxis and cytokine production in response to PGD2, but it is unknown whether ILC2s are active in patients with AERD. OBJECTIVE: We sought to determine whether ILC2 numbers change in peripheral blood and the nasal mucosa during COX-1 inhibitor-induced reactions in patients with AERD...
January 27, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28259239/long-term-comparative-outcomes-of-patients-with-peripheral-artery-disease-with-and-without-concomitant-coronary-artery-disease
#8
Debbie C Chen, Gagan D Singh, Ehrin J Armstrong, Stephen W Waldo, John R Laird, Ezra A Amsterdam
There are limited contemporary data on guideline-directed medical therapy (GDMT) utilization and long-term clinical outcomes in patients with peripheral artery disease (PAD) with and without concomitant coronary artery disease (CAD). From 2006 to 2013, 879 patients with claudication or critical limb ischemia (CLI) underwent diagnostic angiography or therapeutic endovascular intervention at our multidisciplinary vascular center. GDMT use was assessed at the time of angiography, and major adverse cardiovascular and cerebrovascular events (MACCE) and all-cause mortality were determined during 5 years of follow-up...
January 25, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28212985/nonsteroidal-anti-inflammatory-drugs-in-clinical-and-experimental-epilepsy
#9
REVIEW
Beatrice Mihaela Radu, Florin Bogdan Epureanu, Mihai Radu, Paolo Francesco Fabene, Giuseppe Bertini
Current antiepileptic drugs have limited efficacy and provide little or no benefits in 30% of the patients. Given that a role for brain inflammation in epilepsy has been repeatedly reported in recent years, the potential of anti-inflammatory drugs should be explored in depth, as they may provide new therapeutical approaches in preventing or reducing epileptogenesis. Here, we review preclinical (both in vivo and in vitro) and clinical epilepsy studies in which nonsteroidal antiinflammatory drugs (NSAIDs), i...
February 9, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28205318/risk-of-major-bleeding-and-stroke-associated-with-the-use-of-vkas-noacs-and-aspirin-in-patients-with-atrial-fibrillation-a-cohort-study
#10
Emilie Gieling, Hendrika A van den Ham, Hein van Onzenoort, Jacqueline Bos, Cornelis Kramers, Anthonius de Boer, Frank de Vries, Andrea M Burden
INTRODUCTION: Non-vitamin K antagonist oral anticoagulants (NOACs) are now available for the prevention of stroke in patients with atrial fibrillation (AF) as an alternative to vitamin K antagonists (VKA) and aspirin. The comparative effectiveness and safety in daily practice of these different drug classes is still unclear. The objective of this study was to evaluate the risk of major bleeding and stroke in AF patients using NOACs, VKAs or aspirin. METHODS: A retrospective cohort study was conducted among AF patients using the UK Clinical Practice Research Datalink (March 2008-October 2014)...
February 16, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28185918/warfarin-use-and-the-risk-of-mortality-stroke-and-bleeding-in-hemodialysis-patients-with-atrial-fibrillation
#11
Brandon Kai, Yuliya Bogorad, Leigh-Ann N Nguyen, Su-Jau Yang, Wansu Chen, Hillard T Spencer, Albert Y-J Shen, Ming-Sum Lee
BACKGROUND: The optimal management of stroke prophylaxis in hemodialysis patients with atrial fibrillation is controversial. OBJECTIVE: The purpose of this study was to determine the risk of mortality, stroke, and bleeding associated with the use of warfarin in hemodialysis patients with atrial fibrillation. METHODS: This was a retrospective, population-based study of hemodialysis patients with atrial fibrillation between January 1, 2006, and September 30, 2015...
February 6, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28139830/low-dose-aspirin-acetylates-cyclooxygenase-1-in-human-colorectal-mucosa-implications-for-the-chemoprevention-of-colorectal-cancer
#12
Paola Patrignani, Angela Sacco, Carlos Sostres, Annalisa Bruno, Melania Dovizio, Elena Piazuelo, Luigia Di Francesco, Annalisa Contursi, Mirco Zucchelli, Simone Schiavone, Stefania Tacconelli, Carlo Patrono, Angel Lanas
The mechanism of action of low-dose aspirin in the prevention of colorectal cancer (CRC) remains largely hypothetical. We aimed to compare the effects of low-dose aspirin (100 mg/day for 7 days) given to 40 individuals undergoing CRC screening on the extent of cyclooxygenase (COX)-1 acetylation at serine-529 (AceCOX-1), in blood platelets vs colorectal mucosa, at 7 (group 1) and 24 hours (group 2) after dosing. A significantly (P<0.01) lower %AceCOX-1 was detected in colonic and rectal mucosa (average 64%) vs platelets (average 75%) in both groups...
January 31, 2017: Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28139223/urinary-11-dehydro-thromboxane-b2-and-mortality-in-patients-with-stable-coronary-artery-disease
#13
Peter A McCullough, Anupama Vasudevan, Mohanakrishnan Sathyamoorthy, Jeffrey M Schussler, Carlos E Velasco, Luis R Lopez, Caren Swift, Margarita Peterson, Jenna Bennett-Firmin, Raphael Schiffmann, Teodoro Bottiglieri
Antiplatelet therapy with aspirin has been shown to reduce adverse outcomes in patients with coronary artery disease (CAD). Aspirin irreversibly inhibits platelet cyclooxygenase-1 and attenuates thromboxane A2 (TXA2)-mediated platelet aggregation, but there is variable suppression of cyclooxygenase-1. From a cohort of patients with stable CAD, we performed blinded, detailed chart abstraction, and measured urinary 11-dehydro-thromboxane B2 (11dhTxB2), an inactive metabolite of TxA2 from frozen samples. There were 327 men (73%) and 122 women (27%) with a mean age (±SD) of 67 ± 10 and 65 ± 10 years, respectively...
April 1, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28119386/survival-prospects-after-acute-myocardial-infarction-in-the-uk-a-matched-cohort-study-1987-2011
#14
Lisanne A Gitsels, Elena Kulinskaya, Nicholas Steel
OBJECTIVES: Estimate survival after acute myocardial infarction (AMI) in the general population aged 60 and over and the effect of recommended treatments. DESIGN: Cohort study in the UK with routinely collected data between January 1987 and March 2011. SETTING: 310 general practices that contributed to The Health Improvement Network (THIN) database. PARTICIPANTS: 4 cohorts who reached the age of 60, 65, 70, or 75 years between 1987 and 2011 included 16 744, 43 528, 73 728, and 76 392 participants, respectively...
January 24, 2017: BMJ Open
https://www.readbyqxmd.com/read/28108308/role-of-cyclooxygenase-in-the-vascular-response-to-locally-delivered-acetylcholine-in-caucasian-and-african-descent-individuals
#15
Matthew J Maley, James R House, Michael J Tipton, Clare M Eglin
INTRODUCTION: Individuals of African descent (AFD) are more susceptible to non-freezing cold injury (NFCI) compared with Caucasian individuals (CAU). Vasodilatation to acetylcholine (ACh) is lower in AFD compared with CAU in the non-glabrous foot and finger skin sites; the reason for this is unknown. Prostanoids are responsible, in part, for the vasodilator response to ACh, however it is not known whether the contribution differs between ethnicities. METHODS: 12 CAU and 12 AFD males received iontophoresis of ACh (1 w/v%) on non-glabrous foot and finger skin sites following placebo and then aspirin (600mg, single blinded)...
May 2017: Microvascular Research
https://www.readbyqxmd.com/read/28102731/microfluidic-whole-blood-testing-of-platelet-response-to-pharmacological-agents
#16
Ruizhi Li, Tilo Grosser, Scott L Diamond
Platelets present a number of intracellular and transmembrane targets subject to pharmacological modulation, either for cardiovascular disease reduction or as an unintended drug response. Microfluidic devices allow human blood to clot on a defined surface under controlled hemodynamic and pharmacological conditions. The potencies of a number of antiplatelet and anticancer drugs have been tested with respect to platelet deposition on collagen under flow. Inhibitors of cyclooxygenase-1 (COX-1) reduce platelet deposition, either when added ex vivo to blood or ingested orally by patients prior to testing...
January 19, 2017: Platelets
https://www.readbyqxmd.com/read/28097001/mag-dpa-curbs-inflammatory-biomarkers-and-pharmacological-reactivity-in-cytokine-triggered-hyperresponsive-airway-models
#17
Rayan Khaddaj-Mallat, Roddy Hiram, Chantal Sirois, Marco Sirois, Edmond Rizcallah, Sofia Marouan, Caroline Morin, Éric Rousseau
Bronchial inflammation contributes to a sustained elevation of airway hyperresponsiveness (AHR) in asthma. Conversely, omega-3 fatty acid derivatives have been shown to resolve inflammation in various tissues. Thus, the effects of docosapentaenoic acid monoacylglyceride (MAG-DPA) were assessed on inflammatory markers and reactivity of human distal bronchi as well as in a cultured model of guinea pig tracheal rings. Human bronchi were dissected and cultured for 48 h with 10 ng/mL TNF-α or IL-13. Guinea pig tracheas were maintained in organ culture for 72 h which was previously shown to trigger spontaneous AHR...
December 2016: Pharmacology Research & Perspectives
https://www.readbyqxmd.com/read/28095326/additive-antithrombotic-effect-of-asp6537-a-selective-cyclooxygenase-cox-1-inhibitor-in-combination-with-clopidogrel-in-guinea-pigs
#18
Chinatsu Sakata, Ken-Ichi Suzuki, Yoshiaki Morita, Tomihisa Kawasaki
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...
January 14, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28088656/low-dose-aspirin-use-and-survival-in-breast-cancer-patients-a-nationwide-cohort-study
#19
Úna C Mc Menamin, Chris R Cardwell, Carmel M Hughes, Liam J Murray
BACKGROUND: Preclinical evidence from breast cancer cell lines and animal models suggest that aspirin could have anti-cancer properties. In a large breast cancer patient cohort, we investigated whether post-diagnostic low-dose aspirin use was associated with a reduction in the risk of breast cancer-specific mortality. METHODS: We identified 15,140 newly diagnosed breast cancer patients within the Scottish Cancer Registry. Linkages to the Scottish Prescribing Information System provided data on dispensed medications and breast cancer-specific deaths were identified from National Records of Scotland Death Records...
January 12, 2017: Cancer Epidemiology
https://www.readbyqxmd.com/read/28072768/effect-of-low-dose-aspirin-use-on-survival-of-patients-with-gastrointestinal-malignancies-an-observational-study
#20
M A Frouws, E Bastiaannet, R E Langley, W K Chia, M P P van Herk-Sukel, V E P P Lemmens, H Putter, H H Hartgrink, B A Bonsing, C J H Van de Velde, J E A Portielje, G J Liefers
BACKGROUND: Previous studies suggested a relationship between aspirin use and mortality reduction. The mechanism for the effect of aspirin on cancer outcomes remains unclear. The aim of this study was to evaluate aspirin use and survival in patients with gastrointestinal tract cancer. METHODS: Patients with gastrointestinal tract cancer diagnosed between 1998 and 2011 were included. The population-based Eindhoven Cancer Registry was linked to drug-dispensing data from the PHARMO Database Network...
January 2017: British Journal of Cancer
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