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aspirin response

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https://www.readbyqxmd.com/read/29783009/antiplatelet-medication-reversal-strategies-in-operative-intracranial-hemorrhage-a-survey-of-practicing-neurosurgeons
#1
Paul M Foreman, Adeel Ilyas, James Mooney, Philip G R Schmalz, Beverly C Walters, Christoph J Griessenauer
OBJECTIVE: Antiplatelet therapy is common and complicates the operative management of acute intracranial hemorrhage. Little data exist to guide antiplatelet reversal strategies. METHODS: An online survey detailing antiplatelet reversal strategies in patients presenting with acute operative intracranial hemorrhage (subdural hematoma (SDH), epidural hematoma (EDH), and intracerebral hemorrhage (ICH) was distributed to board certified neurosurgeons in the North America...
May 18, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29782360/a-phase-ii-study-of-celecoxib-with-irinotecan-5-fluorouracil-and-leucovorin-in-patients-with-previously-untreated-advanced-or-metastatic-colorectal-cancer
#2
Emerson Y Chen, Charles D Blanke, Daniel G Haller, Al B Benson, Tomislav Dragovich, Heinz-Josef Lenz, Carlos Robles, Hong Li, Motomi Mori, Nora Mattek, Rachel E Sanborn, Charles D Lopez
OBJECTIVE: Colorectal cancer (CRC) is the second leading cause of cancer death in the United States. Cyclooxygenase-2 (COX-2) overexpression is associated with increased tumor invasiveness and proliferation in CRC, and COX-2 inhibition has demonstrated chemopreventive activity. This study investigated the addition of celecoxib, a selective COX-2 inhibitor, to the irinotecan, 5-fluorouracil, and leucovorin (IFL) regimen for patients with previously untreated metastatic CRC. PATIENTS AND METHODS: Forty-seven patients enrolled in this single-arm phase II study received celecoxib at 400 mg orally twice daily in combination with weekly irinotecan (125 mg/m), 5-fluorouracil (500 mg/m), and leucovorin (20 mg/m) for 4 weeks every 6 weeks...
May 18, 2018: American Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29782179/early-intravascular-events-are-associated-with-development-of-ards
#3
Raja-Elie E Abdulnour, Tina Gunderson, Ioanna Barkas, Jack Y Timmons, Cindy Barnig, Michelle Gong, Daryl J Kor, Ognjen Gajic, Daniel Talmor, Rickey E Carter, Bruce D Levy
RATIONALE: The acute respiratory distress syndrome (ARDS) is a devastating illness with limited therapeutic options. A better understanding of early biochemical and immunological events in ARDS could inform the development of new preventive and treatment strategies. OBJECTIVE: To determine select peripheral blood lipid mediator and leukocyte responses in patients at-risk for ARDS. METHODS: Patients at risk for ARDS were randomized as part of a multicenter, double-blind clinical trial of aspirin versus placebo (LIPS-A; NCT01504867)...
May 21, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29781520/associations-of-candidate-gene-polymorphisms-with-poor-responsiveness-to-aspirin-a-meta-analysis
#4
Juesheng Yang, Xianglai Chen, Jianliang Zhou, Shan Hu, Yanhua Tang
Recently, the roles of gene polymorphisms in poor responsiveness to aspirin were extensively investigated, with conflicting results. Therefore, we performed this meta-analysis to better assess the relationship between candidate genetic variants and poor responsiveness to aspirin. Eligible articles were searched in PubMed, Medline, Embase and CNKI. Odds ratios (ORs) with 95% confidence intervals (CIs) were used to detect possible associations of gene polymorphisms with poor responsiveness to aspirin. Among 53 eligible articles, a total of 22 candidate gene polymorphisms were analyzed...
May 21, 2018: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29775206/prospective-determination-of-aspirin-sensitivity-in-patients-resistant-to-low-dose-aspirin-a-proof-of-concept-study
#5
Erica S Westphal, Michelle Rainka, Michelle Amsler, Traci Aladeen, Caitlin Wisniewski, Vernice Bates, Fran M Gengo
This study tested the capability of an assay to predict aspirin response and reduce ischemic events, and healthcare costs, and delays to optimal treatment. Patients who needed aspirin in the course of normal medical care were included. Patients were excluded if they had disorders affecting platelet function, alcohol use within 24 hours of a test, or NSAID use. Dose escalation of chewable aspirin from 81 mg, to 162 mg, to 325 mg daily occurred based on the results of whole blood impedance aggregation testing to the agonists, collagen (1ug/mL, 5 ug/mL) and arachidonate (0...
May 18, 2018: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29775202/the-development-of-an-in-vitro-assay-for-the-prospective-determination-of-aspirin-sensitivity
#6
Erica S Westphal, Caitlin Wisniewski, Michelle Rainka, Nicholas M Smith, Vernice Bates, Fran M Gengo
Aspirin remains the standard for stroke prophylaxis. However, as many as 20%-25% of patients may fail to show a full response to aspirin. Ideally, patients who are resistant to aspirin could be identified, then receive an increased dose of aspirin or be changed to an alternative therapy more efficiently. We have developed an in vitro assay that may make this possible. Healthy volunteers (n = 13) between 18 and 50 years of age were tested for both ex vivo and in vivo responses to aspirin. Dimethyl sulfoxide (DMSO) was selected as the solvent for aspirin in the assay...
May 18, 2018: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29769213/chemopreventive-efficacy-of-the-cyclooxygenase-2-cox-2-inhibitor-celecoxib-is-predicted-by-adenoma-expression-of-cox-2-and-15-pgdh
#7
Jiping Wang, Nancy L Cho, Ann G Zauber, Meier Hsu, Dawn Dawson, Amitabh Srivastava, Kisha A Mitchell-Richards, Sanford D Markowitz, Monica M Bertagnolli
BACKGROUND: The APC trial showed that cyclooxygenase-2 (Cox-2) inhibitor, celecoxib, decreased adenoma development in patients at high risk for colorectal cancer. A prospectively planned analysis of the APC trial tested the hypothesis that expression of target enzymes in adenomas removed before beginning study treatment would identify individuals at high risk of adenoma development, and/or predict response to Cox-2 inhibition. METHODS: Pre-treatment adenomas were examined using immunohistochemistry (IHC) to assess expression of Cox-2 (high vs...
May 16, 2018: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/29757761/aspirin-resistance-cardiovascular-risk-game-changer
#8
Ahmed S Yassin, Hossam Abubakar, Tushar Mishra, Ahmed Subahi, Melanie Hartman, Abdelrahman Ahmed, Walid Ibrahim, Manmohan Singh, Mohit Pahuja
BACKGROUND: Aspirin (ASA) is the most used medication on the globe. ASA is a primary pillar of the secondary prevention of cardiovascular atherothromboembolic events. However, a fraction of the population does not respond to ASA as expected in a unique phenomenon called ASA resistance. Multiple mechanisms were described and studied in the literature to explain this phenomenon. AREA OF UNCERTAINTY: ASA resistance is an interesting phenomenon that is worth studying and reviewing...
May 3, 2018: American Journal of Therapeutics
https://www.readbyqxmd.com/read/29755535/optimization-and-characterization-of-aspirin-encapsulated-nano-liposomes
#9
Samira Khodayar, Hassan Bardania, Seyed Abbas Shojaosadati, Fatemeh Bagheri
Resistance to aspirin and its cytotoxicity significantly limits its therapeutic applications. Nano-liposomal encapsulation of aspirin can reduce its cytotoxicity. In this study, aspirin encapsulating nano-liposomes (AS-NL) was prepared and its performance in drug delivery and also cytotoxicity was evaluated. The effects of two independent variables including number of freeze/thawing cycles and concentration of aspirin on encapsulation efficiency was investigated using response surface methodology (RSM). A drug profile release was obtained by AS-NL...
2018: Iranian Journal of Pharmaceutical Research: IJPR
https://www.readbyqxmd.com/read/29754836/misoprostol-for-small-bowel-ulcers-in-patients-with-obscure-bleeding-taking-aspirin-and-non-steroidal-anti-inflammatory-drugs-masters-a-randomised-double-blind-placebo-controlled-phase-3-trial
#10
Ali S Taha, Caroline McCloskey, Paula McSkimming, Alex McConnachie
BACKGROUND: The incidence of obscure gastrointestinal bleeding, which originates from the small bowel and is mainly associated with the use of aspirin and non-steroidal anti-inflammatory drugs (NSAIDs), is rising. We assessed the efficacy and safety of misoprostol for the treatment of small bowel ulcers and erosions in patients taking low-dose aspirin or NSAIDs with obscure gastrointestinal bleeding. METHODS: In this randomised, double-blind, placebo-controlled, phase 3 trial, we recruited patients (aged ≥18 years) with small bowel ulcers who were taking low-dose aspirin, NSAIDs, or both for a minimum of 4 weeks, at University Hospital Crosshouse (Kilmarnock, UK)...
May 10, 2018: Lancet. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/29750634/effectiveness-of-febuxostat-in-patients-with-allopurinol-refractory-hyperuricemic-chronic-kidney-disease
#11
Chae Hee Kwak, Minji Sohn, Nayoung Han, Yoon-Sook Cho, Yon Su Kim, Jung Mi Oh
OBJECTIVE: As uncontrolled hyperuricemia has been associated with an increased risk of cardiovascular disease and the progression of chronic kidney disease (CKD), management of serum uric acid levels is important. The aim of this study was to evaluate the effectiveness of febuxostat in regulating uncontrolled hyperuricemia in patients with renal dysfunction. MATERIALS AND METHODS: We included patients with CKD and persistent uncontrolled hyperuricemia despite treatment with allopurinol...
May 11, 2018: International Journal of Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29743949/favourable-response-of-serum-prostate-specific-antigen-to-conjugated-oestrogen-in-castrate-resistant-prostate-cancer-in-jamaica
#12
Andrew Condappa, Maxine Gossell-Williams, William Aiken
Conjugated oestrogen is one of the more affordable secondary hormonal options available for castrate-resistant prostate cancer (CRPC) in Jamaica. The present study was conducted to examine the disease response in Jamaican men with CRPC treated with conjugated oestrogen. This study retrospectively reviewed the medical notes of patients who attended the urologic clinic of the University Hospital of the West Indies from 1 January 2009 to 31 December 2013 and a private urology clinic from 2 November 2005 to 3 June 2015 to identify patients diagnosed with CRPC treated with conjugated oestrogen (Premarin ®) as secondary therapy...
2018: Ecancermedicalscience
https://www.readbyqxmd.com/read/29740435/a-beneficial-effect-of-low-dose-aspirin-in-a-murine-model-of-active-tuberculosis
#13
Vera Marie Kroesen, Paula Rodríguez-Martínez, Eric García, Yaiza Rosales, Jorge Díaz, Montse Martín-Céspedes, Gustavo Tapia, Maria Rosa Sarrias, Pere-Joan Cardona, Cristina Vilaplana
An excessive, non-productive host-immune response is detrimental in active, chronic tuberculosis (TB) disease as it typically leads to tissue damage. Given their anti-inflammatory effect, non-steroidal anti-inflammatory drugs can potentially attenuate excessive inflammation in active TB disease. As such, we investigated the prophylactic and therapeutic effect of low-dose aspirin (LDA) (3 mg/kg/day), either alone or in combination with common anti-TB treatment or BCG vaccination, on disease outcome in an experimental murine model of active TB...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29734110/calixarene-doped-pvc-polymeric-films-as-size-selective-optical-sensors-monitoring-of-salicylate-in-real-samples
#14
Fatehy M Abdel-Haleem, Rasha M El Nashar
Preparation of novel salicylate-selective optical sensors (bulk optodes) was performed and applied successfully for salicylate determination in pharmaceutical formulations, Aspirin® and Aspocid®. t-butyl calix[4]arene ionophore was incorporated in a plasticized poly (vinyl-chloride) membrane containing the chromoionophore ETH5294 (O1 ) or ETH7075 (O5 ). The optical response to salicylate was due to size-selective extraction of salicylate from the aqueous solution to the optode bulk through formation of hydrogen bond accompanied by chromoionophore protonation, that resulted in the optical response at 680 or 540 nm for O1 or O5 , respectively...
May 1, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29731992/response-to-clopidogrel-is-associated-with-early-neurological-deterioration-after-acute-ischemic-stroke
#15
Xingyang Yi, Jing Lin, Yanfen Wang, Ju Zhou, Qiang Zhou, Chun Wang
Purpose: The relationship between response to clopidogrel and early neurological deterioration (END) after acute ischemic stroke (IS) is not well defined. The aim of present study was to evaluate the associations of clopidogrel resistance (CR) with END, and stratified analyze the effectiveness of clopidogrel alone and clopidogrel plus aspirin for the prevention of END. Results: A total of 375 patients, 144 patients were received clopidogrel alone, 231 patients took clopidogrel plus aspirin...
April 13, 2018: Oncotarget
https://www.readbyqxmd.com/read/29723426/cyp2c19-or-cyp3a5-genotyping-does-not-predict-clinical-response-to-clopidogrel
#16
Fayna Rodríguez-González, Efren Martínez-Quintana, Pedro Saavedra, José M Medina-Gil, Marta Riaño, Paloma Garay-Sánchez, Antonio Tugores
Along with aspirin, clopidogrel has been a widely used antiplatelet therapeutic regimen. Although generally well tolerated, its efficacy varies among individuals, with the main hypothesis that its bioavailability relies on its bioconversion to the active compound, which, in turn, depends on the genetic background and/or interactions with other drugs. To determine which factors influenced response in our patients, 368 patients receiving combined antiaggregation therapy with aspirin and clopidogrel were followed for 1 year to record 30 novel cardiovascular acute events...
May 3, 2018: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29723062/resolvin-e1-attenuates-injury-induced-vascular-neointimal-formation-by-inhibition-of-inflammatory-responses-and-vascular-smooth-muscle-cell-migration
#17
Guizhu Liu, Yanjun Gong, Rui Zhang, Lingjuan Piao, Xinzhi Li, Qian Liu, Shuai Yan, Yujun Shen, Shumin Guo, Mingjiang Zhu, Huiyong Yin, Colin D Funk, Jian Zhang, Ying Yu
Mechanical insults, such as stent implantation, can induce endothelial injury, vascular inflammation, and ultimately lead to vascular neointimal hyperplasia. Resolvin E1 (RvE1), derived from the ω3 fatty acid eicosapentaenoic acid, can facilitate the resolution of inflammation in many settings. We therefore aimed to determine if there was a role for RvE1 in preventing neointimal formation after arterial injury and to understand the underlying mechanisms. Vascular inflammation and neointimal hyperplasia were induced by wire injury in the femoral arteries of mice...
May 3, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29701913/the-influence-of-abcb1-and-p2y12-genetic-variants-on-clinical-outcomes-in-chinese-intracranial-artery-stenosis-patients
#18
Xingang Li, Liqun Jiang, Shusen Sun, Wei Li, Xiaoqing Li, Zhongrong Miao, Zhigang Zhao, Ning Ma
For intracranial artery stenosis patients, high inter-individual variability in response to antiplatelet drug therapy results in recurrent ischemic events. We aimed to evaluate the association of drug-related genetic polymorphisms with adverse clinical outcomes. We consecutively enrolled 157 patients receiving dual-antiplatelet therapy (aspirin plus clopidogrel), and adverse clinical events occurred in 10 patients during the one year follow-up. The P2Y12 polymorphisms (rs9859538 and rs10935842) were associated with increased likelihood of relapse events (OR=2...
April 27, 2018: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29698447/celecoxib-use-and-circulating-oxylipins-in-a-colon-polyp-prevention-trial
#19
Jessica A Martinez, Jun Yang, Betsy C Wertheim, Denise J Roe, Alexander Schriewer, Peter Lance, David S Alberts, Bruce D Hammock, Patricia A Thompson
Drugs that inhibit cyclooxygenase (COX)-2 and the metabolism of arachidonic acid (ARA) to prostaglandin E2 are potent anti-inflammatory agents used widely in the treatment of joint and muscle pain. Despite their benefits, daily use of these drugs has been associated with hypertension, cardiovascular and gastrointestinal toxicities. It is now recognized that ARA is metabolized to a number of bioactive oxygenated lipids (oxylipins) by cyclooxygenase (COX), lipoxygenase (LOX), and cytochrome P450 (CYP450) enzymes...
2018: PloS One
https://www.readbyqxmd.com/read/29695380/association-between-nonsteroidal-anti-inflammatory-drugs-and-colorectal-cancer-a-population-based-case-control-study
#20
Chun-Nan Kuo, Jen-Jung Pan, Ya-Wen Huang, Hui-Ju Tsai, Wei-Chiao Chang
BACKGROUND: Cyclooxygenes-2 overexpression may contribute to colorectal cancer (CRC) occurrence. Aspirin and non-steroidal anti-inflammatory drugs (NSAIDs) can reduce CRC recurrence, but the efficacy of primary prevention in Asian populations is still elusive. Thus, we examined the primary preventive efficacy of aspirin and NSAIDs on CRC incidence in Taiwan. METHODS: A nested case-control study was conducted using the National Health Insurance Research Database in Taiwan...
April 25, 2018: Cancer Epidemiology, Biomarkers & Prevention
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