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https://www.readbyqxmd.com/read/27930430/w1-a-novel-oral-antiplatelet-agent-with-less-resistance-than-clopidogrel
#1
Pengxin Ge, Li Du, Chunguang Han, Hui Li, Yanguo Feng, Jie Han, Zhen Wang, Liangzhong Xiong, Meiru Yuan, Yongxue Liu
Clopidogrel is a clinical antiplatelet agent, about which there are major concerns because its antiplatelet efficiency decreases with insufficient metabolic activation, leading to "clopidogrel resistance." We aimed to determine the antiplatelet effects of W1, a novel molecule composed of 2-O-clopidogrel and aspirin (1:1 ratio), on platelet aggregation ex vivo and thrombus formation in vivo, and its susceptibility to "clopidogrel resistance" in combination with other therapies in rats. Platelets were prepared, and an arteriovenous shunt thrombosis model was established using Wistar rats to measure platelet aggregation and thrombus formation, respectively...
November 24, 2016: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/27913448/targeting-inflammation-in-cancer-prevention-and-therapy
#2
REVIEW
Jelena Todoric, Laura Antonucci, Michael Karin
Inflammation is associated with the development and malignant progression of most cancers. As most of the cell types involved in cancer-associated inflammation are genetically stable and thus are not subjected to rapid emergence of drug resistance, the targeting of inflammation represents an attractive strategy both for cancer prevention and for cancer therapy. Tumor-extrinsic inflammation is caused by many factors, including bacterial and viral infections, autoimmune diseases, obesity, tobacco smoking, asbestos exposure, and excessive alcohol consumption, all of which increase cancer risk and stimulate malignant progression...
December 2016: Cancer Prevention Research
https://www.readbyqxmd.com/read/27892731/is-arachidonic-acid-stimulation-really-a-test-for-the-response-to-aspirin-time-to-think-again
#3
Bartosz Olechowski, Alexander Ashby, Mark Mariathas, Vikram Khanna, Michael Mahmoudi, Nick Curzen
Platelets play a key role in pathogenesis of atherothrombosis. Activated platelets initiate thrombus formation. Antiplatelet therapy (APT) modifies these properties. APT involves aspirin. The existence of "aspirin resistance" is reported in many populations with cardiovascular disease. The prevalence of this phenomenon is highly variable, affecting more than 50% of patient subgroups in some papers. Areas covered: This review describes the prevalence of "aspirin resistance", analyses why there is so much apparent variation and addresses whether the commonly used tests of aspirin response are in fact accurately assessing its functional performance...
November 28, 2016: Expert Review of Cardiovascular Therapy
https://www.readbyqxmd.com/read/27872414/effect-of-low-dose-aspirin-on-midluteal-phase-uterine-artery-blood-flow-in-patients-with-recurrent-pregnancy-loss
#4
Xiaomin Kang, Tongfei Wang, Liyin He, Haijing Xu, Zhilan Liu, Aimin Zhao
OBJECTIVES: The purpose of this study was to evaluate differences in uterine artery blood flow parameters and pregnancy outcomes, if any. An investigation was conducted to determine the effects of low-dose aspirin on uterine artery blood flow indices in patients with recurrent pregnancy loss. METHODS: This observational study included 353 Chinese women with a history of recurrent pregnancy loss and 85 women without a history of recurrent pregnancy loss (control group) from Ren Ji Hospital...
December 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/27862978/abcc3-polymorphisms-and-mrna-expression-influence-the-concentration-of-a-carboxylic-acid-metabolite-in-patients-on-clopidogrel-and-aspirin-therapy
#5
André Ducati Luchessi, Marta Concheiro, Juliana de Freitas Germano, Vivian Nogueira Silbiger, Raul Hernandes Bortolin, Angelines Cruz, Oscar Quintela, Maria Brion, Angel Carracedo, Andres Iñiguez, Marisol Bravo, Manuel López-Rivadulla, Rosario Dominguez Crespo Hirata, Amanda Guerra Moraes Rego Sousa, Mario Hiroyuki Hirata
Acetylsalicylic acid and clopidogrel combined therapy has been reported to be beneficial in patients with acute coronary syndrome (ACS). Antiplatelet drug resistance, especially to clopidogrel, is a multifactorial phenomenon that affects a large number of ACS patients. The genetic contribution to this drug response is not fully elucidated. We investigated the relationship of ABC-type efflux subfamily C member 3 (ABCC3) polymorphisms and mRNA expression with plasma concentrations of clopidogrel, salicylic acid (SA), and a carboxylic acid metabolite (CAM)...
November 12, 2016: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/27793830/benzoate-and-salicylate-tolerant-strains-lose-antibiotic-resistance-during-laboratory-evolution-of-escherichia-coli-k-12
#6
Kaitlin E Creamer, Frederick S Ditmars, Preston J Basting, Karina S Kunka, Issam N Hamdallah, Sean P Bush, Zachary Scott, Amanda He, Stephanie R Penix, Alexandra S Gonzales, Elizabeth K Eder, Dominic Camperchioli, Adama Berndt, Michelle W Clark, Kerry A Rouhier, Joan L Slonczewski
: Escherichia coli K-12 W3110 grows in the presence of membrane-permeant organic acids that can depress cytoplasmic pH and accumulate in the cytoplasm. We conducted experimental evolution by daily diluting cultures in increasing concentrations of benzoic acid (up to 20 mM) buffered at external pH 6.5, a pH at which permeant acids concentrate in the cytoplasm. By 2,000 generations, clones isolated from evolving populations showed increasing tolerance to benzoate but were sensitive to chloramphenicol and tetracycline...
October 28, 2016: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27774429/preventive-potentials-of-piperlongumine-and-a-piper-longum-extract-against-stress-responses-and-pain
#7
Vaishali Yadav, Shyam Sunder Chatterjee, Muhammed Majeed, Vikas Kumar
AIM: To compare stress resistance increasing and analgesic activities of piperlongumine and a methanolic Piper longum fruit extract (PLE). METHODS: Efficacies of a single and repeated daily oral doses (1-256 mg/kg/day) of PLE, piperlongumine, and 50 mg/kg/day doxycycline against foot shock stress triggered alteration in body weights and core temperatures, and of their 11 daily doses on antidepressants like activity in tail suspension test and on pentobarbital induced sedation in male mice were compared...
October 2016: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/27773400/oral-antiplatelet-therapy-and-platelet-inhibition-an-experience-from-a-tertiary-care-center
#8
Jamshed J Dalal, Aarti Digrajkar, Alap Gandhi
AIMS AND OBJECTIVES: Although clopidogrel combined with aspirin is the most commonly used dual drug combination to avert thrombotic events in patients with coronary artery disease, the poor responsiveness to clopidogrel remains a concern. The objective of the current study is to assess the extent of resistance to clopidogrel, prasugrel, and ticagrelor in a real life set of patients with coronary artery disease who underwent percutaneous coronary intervention (PCI). MATERIALS AND METHODS: A total of 539 patients, who underwent PCI and were on aspirin and on any of the three drugs, namely, clopidogrel, prasugrel and ticagrelor, were followed up regularly in the outpatient department...
September 2016: Indian Heart Journal
https://www.readbyqxmd.com/read/27761425/comparison-of-antiplatelet-activity-of-garlic-tablets-with-cardio-protective-dose-of-aspirin-in-healthy-volunteers-a-randomized-clinical-trial
#9
Mojtaba Shafiekhani, Pouya Faridi, Javad Kojuri, Soha Namazi
OBJECTIVE: Some of the adverse effects of aspirin including peptic ulcers, gastrointestinal bleeding and aspirin resistance compelled researchers to find a suitable alternative with fewer adverse effects. In this clinical trial, we aimed to find the effective antiplatelet dose of garlic. MATERIALS AND METHODS: This randomized controlled clinical trial (RCT) was conducted on 62 healthy volunteers of 20-50 years old. All volunteers used 80 mg aspirin per day for 1 week and at the end of this time, platelet aggregation (PA) induced by 4 agonists acting in aggregation pathway including adenosinediphosphate (20 μmol/l), epinephrine (20 μmol/l), collagen(0...
September 2016: Avicenna Journal of Phytomedicine
https://www.readbyqxmd.com/read/27753953/os-08-03-pharmacogenetic-markers-of-survival
#10
Vera Erdman, Ilsia Tuktarova, Timur Nasibullin, Ianina Timasheva, Olga Mustafina
OBJECTIVE: Physiological and biochemical changes during aging alter drug metabolism. Drug intake is increased with age because of cumulative morbidity, in particular, high prevalence of cardiovascular diseases. Antihypertensive medications are the most commonly used drugs. Individual drug sensitivity or resistance may be influenced by the variance of the "pharmacological response" genes.Our purpose was to search for the polymorphic variants of "pharmacological response" genes associated with survival in different age periods...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27745943/-prevalence-and-prognosis-of-aspirin-resistance-in-critical-limb-ischemia-patients
#11
J-S Doly, E Lorian, I Desormais, J Constans, A Bura Rivière, P Lacroix
OBJECTIVES: To assess the prevalence and the association between aspirin resistance in critical limb ischemia patients using the VerifyNow(®) bed-side platelet test, and occurrence of cardiovascular morbidity and/or death at one year. MATERIALS AND METHODS: National multicenter prospective observational study related to COPART II centers. From 2010 through 2014, 64 subjects hospitalized for critical limb ischemia and already treated by aspirin before the VerifyNow(®) test were included...
October 13, 2016: Journal des Maladies Vasculaires
https://www.readbyqxmd.com/read/27727852/aspirin-resistance-in-acute-ischemic-stroke-and-its-association-with-plasma-isoprostane-levels
#12
Sandeep Surendran, V Gilvas, A A Sherif, A Nair, V Nambiar
No abstract text is available yet for this article.
January 2016: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/27685608/omalizumab-in-patient-with-aspirin-exacerbated-respiratory-disease-and-chronic-idiopathic-urticaria
#13
Federica Porcaro, Antonio Di Marco, Renato Cutrera
Aspirin hypersensitivity associated with chronic rhinosinusitis-with or without nasal polyposis-and asthma resistant to conventional therapy defines the aspirin-exacerbated respiratory disease (AERD). We describe the case of a 15-year-old female patient with adverse reaction to aspirin, chronic rhinosinusitis, and severe asthma. She also experienced chronic idiopathic urticaria worsened by non-steroidal anti-inflammatory drug administration. AERD was diagnosed based on clinical history and symptoms. Given the poor responsiveness to standard therapy for respiratory and cutaneous symptoms, omalizumab was administered for 24 weeks with control of respiratory symptoms and short term improvement of cutaneous symptoms...
September 29, 2016: Pediatric Pulmonology
https://www.readbyqxmd.com/read/27683757/enhanced-platelet-mrp4-expression-and-correlation-with-platelet-function-in-patients-under-chronic-aspirin-treatment
#14
Isabella Massimi, Lavinia Vittoria Lotti, Flavia Temperilli, Massimo Mancone, Gennaro Sardella, Simone Calcagno, Ombretta Turriziani, Luigi Frati, Fabio M Pulcinelli
Platelet multidrug resistance protein4 (MRP4)-overexpression has a role in reducing aspirin action. Aspirin in vivo treatment enhances platelet MRP4 expression and MRP4 mediated transport inhibition reduces platelet function and delays thrombus formation. The aim of our work was to verify whether MRP4 expression is enhanced in platelets obtained from patients under chronic aspirin treatment and whether it correlates with residual platelet reactivity. We evaluated changes on mRNA and protein-MRP4 expression and platelet aggregation in four populations: healthy volunteers (HV), aspirin-free control population (CTR), patients who started the treatment less than one month ago (ASA<1 month patients) and aspirinated patients who started the treatment more than two months ago (ASA>2 months patients)...
November 30, 2016: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/27641736/associations-of-mdr1-tbxa2r-pla2g7-and-pear1-genetic-polymorphisms-with-the-platelet-activity-in-chinese-ischemic-stroke-patients-receiving-aspirin-therapy
#15
Ling-Ling Peng, Yuan-Qi Zhao, Zi-Yi Zhou, Jing Jin, Min Zhao, Xin-Meng Chen, Ling-Yan Chen, Ye-Feng Cai, Jia-Li Li, Min Huang
AIM: Aspirin resistance has an incidence of 5%-65% in patients with ischemic stroke, who receive the standard dose of aspirin, but the platelet function is inadequately inhibited, thereby leading to thrombotic events. Numerous evidence shows that thromboxane A2 receptor (TXA2 receptor, encoded by TBXA2R), lipoprotein-associated phospholipase A2 (Lp-PLA2, encoded by PLA2G7) and platelet endothelial aggregation receptor-1 (PEAR1, encoded by PEAR1) are crucial in regulating platelet activation, and P-glycoprotein (P-gp, encoded by MDR1) influences the absorption of aspirin in the intestine...
November 2016: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/27594876/establishing-a-predictive-model-for-aspirin-resistance-in-elderly-chinese-patients-with-chronic-cardiovascular-disease
#16
Jian Cao, Wei-Jun Hao, Ling-Gen Gao, Tian-Meng Chen, Lin Liu, Yu-Fa Sun, Guo-Liang Hu, Yi-Xin Hu, Li Fan
BACKGROUND: Resistance to anti-platelet therapy is detrimental to patients. Our aim was to establish a predictive model for aspirin resistance to identify high-risk patients and to propose appropriate intervention. METHODS: Elderly patients (n = 1130) with stable chronic coronary heart disease who were taking aspirin (75 mg) for > 2 months were included. Details of their basic characteristics, laboratory test results, and medications were collected. Logistic regression analysis was performed to establish a predictive model for aspirin resistance...
July 2016: Journal of Geriatric Cardiology: JGC
https://www.readbyqxmd.com/read/27590181/kawasaki-disease-etiopathogenesis-and-novel-treatment-strategies
#17
Shreya Agarwal, Devendra K Agrawal
INTRODUCTION: Kawasaki disease is an acute febrile systemic vasculitis that predominantly occurs in children below five years of age. Its etiopathogenesis is still not clear, but it is thought to be a complex interplay of genetic factors, infections and immunity. AREAS COVERED: This review article discusses in detail Kawasaki disease, with particular emphasis on the recent updates on its pathogenesis and upcoming alternate treatment options. Though self-limiting in many cases, it can lead to severe complications like coronary artery aneurysms and thrombo-embolic occlusions, and hence requires early diagnosis and urgent attention to avoid them...
September 13, 2016: Expert Review of Clinical Immunology
https://www.readbyqxmd.com/read/27582771/high-prevalence-of-aspirin-resistance-in-elderly-patients-with-cardiovascular-disease-and-metabolic-syndrome
#18
Lin Liu, Ying-Hui Gao, Jian Cao, Hua-Xin Zhang, Li Fan, Guo-Liang Hu, Yi-Xin Hu, Xiao-Li Li, Xiao Zou, Jian-Hua Li
BACKGROUND: Metabolic syndrome is known to be a prothrombotic state. We undertook this study to examine a hypothesis that aspirin resistance may be associated with metabolic syndrome, and to assess other potential determinants of aspirin resistance in patients with cardiovascular disease (CVD). METHODS: A total of 469 elderly patients with CVD were recruited. One hundred and seventy-two patients with metabolic syndrome and 297 without metabolic syndrome (control group) received daily aspirin therapy (≥ 75 mg) over one month...
September 2016: Journal of Geriatric Cardiology: JGC
https://www.readbyqxmd.com/read/27567928/aspirin-in-pancreatic-cancer-chemopreventive-effects-and-therapeutic-potentials
#19
REVIEW
Ming-Jie Jiang, Juan-Juan Dai, Dian-Na Gu, Qian Huang, Ling Tian
Pancreatic cancer is one of the most aggressive malignancies with dismal prognosis. Recently, aspirin has been found to be an effective chemopreventive agent for many solid tumors. However, the function of aspirin use in pancreatic cancer largely remains unknown. We herein argued that aspirin could also lower the risk of pancreatic cancer. Importantly, aspirin assumes pleiotropic effects by targeting multiple molecules. It could further target the unique tumor biology of pancreatic cancer and modify the cancer microenvironment, thus showing remarkable therapeutic potentials...
August 24, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27555873/simultaneous-two-vessel-subacute-stent-thrombosis-caused-by-clopidogrel-resistance-from-cyp2c19-polymorphism
#20
Ashwad Afzal, Bimal Patel, Neel Patel, Sudhakar Sattur, Vinod Patel
Clopidogrel resistance from CYP2C19 polymorphism has been associated with stent thrombosis in patients undergoing percutaneous coronary intervention with drug-eluting stents. We present a case of a 76-year-old male who received drug-eluting stents to the right coronary artery and left anterior descending artery for non-ST elevation myocardial infarction and was discharged on dual antiplatelet therapy with aspirin and clopidogrel. He subsequently presented with chest pain from anterior, anteroseptal, and inferior ST segment elevation myocardial infarction...
2016: Case Reports in Medicine
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