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https://www.readbyqxmd.com/read/29450643/variants-in-fix-propeptide-associated-with-vitamin-k-antagonist-hypersensitivity-functional-analysis-and-additional-data-confirming-the-common-founder-mutations
#1
Behnaz Pezeshkpoor, Katrin J Czogalla, Michael Caspers, Ann-Cristin Berkemeier, Kerstin Liphardt, Suvoshree Ghosh, Marco Kellner, Silvia Ulrich, Anna Pavlova, Johannes Oldenburg
One of the most common and unwanted side effects during oral anticoagulant therapy (OAT) is bleeding complications. In rare cases, vitamin K antagonist (VKA)-related bleeding events are associated with mutations affecting the F9 propeptide at amino acid position 37 due to a substitution of alanine to either valine or threonine. Based on our actual cohort of 18 patients, we update the knowledge on this rare phenotype and its origin. A founder mutation for both variants was reconfirmed by haplotype analysis of intronic and extragenic short tandem repeat (STR) polymorphisms with a higher prevalence in Switzerland than in other regions of Europe...
February 15, 2018: Annals of Hematology
https://www.readbyqxmd.com/read/29400612/the-pharmacoepigenomics-informatics-pipeline-defines-a-pathway-of-novel-and-known-warfarin-pharmacogenomics-variants
#2
Ari Allyn-Feuer, Alex Ade, Jasmine A Luzum, Gerald A Higgins, Brian D Athey
AIM: 'Pharmacoepigenomics' methods informed by omics datasets and pre-existing knowledge have yielded discoveries in neuropsychiatric pharmacogenomics. Now we evaluate the generality of these methods by discovering an extended warfarin pharmacogenomics pathway. MATERIALS & METHODS: We developed the pharmacoepigenomics informatics pipeline, a scalable multi-omics variant screening pipeline for pharmacogenomics, and conducted an experiment in the genomics of warfarin...
February 5, 2018: Pharmacogenomics
https://www.readbyqxmd.com/read/29391010/a-multicenter-prospective-study-evaluating-the-impact-of-the-clinical-pharmacist-physician-counselling-on-warfarin-therapy-management-in-lebanon
#3
Nermine S Choumane, Diana N Malaeb, Bassem Malaeb, Souheil Hallit
BACKGROUND: Health care professionals (HCP) are known key elements of effective patient's counselling and education. For patients taking warfarin, education about the dose, side effects, and toxicity is clearly identified as a cornerstone of achieving improved health and quality of life. The study objective was to evaluate the patients' knowledge about warfarin and assess the impact of the health care professionals' counselling in enhancing patients' knowledge in achieving warfarin therapeutic outcomes...
February 1, 2018: BMC Health Services Research
https://www.readbyqxmd.com/read/29374418/fast-apixaban-related-resolution-of-left-ventricular-thrombi-in-a-patient-with-dilated-cardiomyopathy
#4
Waldemar Elikowski, Magorzata Małek-Elikowska, Natalia Fertała, Magdalena Zawodna, Kamila Kruzel
Left ventricular thrombi (LVTs) develop most often in patients with post-myocardial left ventricular dysfunction and in cardiomyopathies, particularly in dilated cardiomyopathy (DCM). They constitute a danger of systemic embolization. So far, direct-acting oral anticoagulants (DOACs), including apixaban - a selective inhibitor of active Factor X, have not been systematically investigated in patients with LVTs; study comparing the efficacy of apixaban and warfarin has been undertaken only recently. A few case reports or case series presenting patients with LVTs treated with DOACs are available in the literature...
January 23, 2018: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29368193/periprocedural-anticoagulation-management-for-atrial-fibrillation-ablation-current-knowledge-and-future-directions
#5
REVIEW
Alan Sugrue, Konstantinos C Siontis, Jonathan P Piccini, Peter A Noseworthy
Catheter ablation (CA) for atrial fibrillation (AF) is an established first-line approach to the management of drug-refractory AF. Although, advancements in procedural techniques and technology have improved the efficacy and safety of CA, thromboembolism (TE) remains one of the most feared periprocedural complications. Minimizing the risk of TE during and after CA requires a multifaceted approach, in which periprocedural anticoagulation plays a central role. The goal of anticoagulation before, during, and after CA is to minimize TE risk without excessively increasing the risk of adverse bleeding...
January 25, 2018: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29317397/factors-associated-with-availability-of-anticoagulation-reversal-agents-in-rural-and-community-emergency-departments
#6
Brett A Faine, Julie Amendola, Jordan Homan, Azeemuddin Ahmed, Nicholas Mohr
PURPOSE: Results of a study of anticoagulation reversal agent availability in rural and community hospital emergency departments (EDs) are reported. METHODS: A cross-sectional telephone survey was conducted to test the hypothesis that anticoagulation reversal agents are not commonly stocked in low-volume EDs. In phase 1 of the study, a physician, pharmacist, or nurse manager at a sample of EDs in 1 state was surveyed to characterize anticoagulation reversal agent availability and the presence or absence of reversal protocols; in phase 2, follow-up qualitative interviews were conducted with hospital pharmacists selected by purposive sampling to identify barriers to availability...
January 15, 2018: American Journal of Health-system Pharmacy: AJHP
https://www.readbyqxmd.com/read/29218901/using-simulation-and-optimization-approach-to-improve-outcome-through-warfarin-precision-treatment
#7
Chih-Lin Chi, Lu He, Kourosh Ravvaz, John Weissert, Peter J Tonellato
We apply a treatment simulation and optimization approach to develop decision support guidance for warfarin precision treatment plans. Simulation include the use of ∼1,500,000 clinical avatars (simulated patients) generated by an integrated data-driven and domain-knowledge based Bayesian Network Modeling approach. Subsequently, we simulate 30-day individual patient response to warfarin treatment of five clinical and genetic treatment plans followed by both individual and subpopulation based optimization. Sub-population optimization (compared to individual optimization) provides a cost effective and realistic means of implementation of a precision-driven treatment plan in practical settings...
2018: Pacific Symposium on Biocomputing
https://www.readbyqxmd.com/read/29196903/concurrent-use-of-prescription-drugs-and-herbal-medicinal-products-in-older-adults-a-systematic-review
#8
REVIEW
Taofikat B Agbabiaka, Barbara Wider, Leala K Watson, Claire Goodman
BACKGROUND: The use of herbal medicinal products (HMPs) is common among older adults; however, little is known about concurrent use with prescription drugs, as well as potential interactions associated with such combinations. OBJECTIVE: The aim of this systematic review was to identify and evaluate the literature on concurrent prescription and HMP use among older adults to assess prevalence, patterns, potential interactions and factors associated with this use. METHODS: Systematic searches were conducted in the MEDLINE, PsycINFO, EMBASE, CINAHL, AMED, Web of Science and Cochrane databases from inception to May 2017 for studies reporting concurrent use of prescription medicines with HMPs in adults ≥ 65 years of age...
December 2017: Drugs & Aging
https://www.readbyqxmd.com/read/29193545/identification-and-characterization-of-a-single-high-affinity-fatty-acid-binding-site-in-human-serum-albumin
#9
Stefan Petry, Lea Wenskowsky, Herman Schreuder, Volker Derdau, Hans Matter, Julia Volkmar, Till Opatz
A single high-affinity fatty acid binding site in the important human transport protein serum albumin (HSA) is identified and characterized using a NBD (7-nitrobenz-2-oxa-1,3-diazol-4-yl)-C12 fatty acid. This ligand exhibits a 1:1 binding stoichiometry in its HSA complex with high site-specificity. The complex dissociation constant is determined by titration experiments as well as radioactive equilibrium dialysis. Competition experiments with known HSA-binding drugs warfarin and ibuprofen confirm the new binding site to be different from Sudlow-sites I and II...
November 28, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/29192498/membrane-protein-structure-in-live-cells-methodology-for-studying-drug-interaction-by-mass-spectrometry-based-footprinting
#10
Guo-Min Shen, Shuang Li, Weidong Cui, Shixuan Liu, Yihu Yang, Michael L Gross, Weikai Li
Mass spectrometry (MS) based footprinting is an emerging approach to study protein structure. Because integral membrane proteins are difficult targets for conventional structural biology, we recently developed a MS footprinting method to probe membrane protein/drug interactions in live cells. This method can detect structural difference between apo and drug-bound states of membrane proteins, with the changes inferred from MS quantification of the cysteine modification pattern, generated by residue-specific chemical labeling...
December 1, 2017: Biochemistry
https://www.readbyqxmd.com/read/29191640/incidence-of-visible-hematuria-among-antithrombotic-agents-a-systematic-review-of-over-175-000-patients
#11
Nikita R Bhatt, Niall F Davis, William J Nolan, Robert J Flynn, Ted McDermott, Arun Z Thomas, Rustom P Manecksha
OBJECTIVE: To determine the probability of visible hematuria with antithrombotic agents and to evaluate association of urologic etiology in antithrombotic-related hematuria. METHODS: Preferred Reporting Items in Systematic Reviews and Meta-Analyses guidelines were followed to conduct a systematic review using search engines PUBMED and SCOPUS with the terms "(hematuria) OR (haematuria) OR urinary bleeding)) AND ((anticoagulants) OR anticoagulation) OR noac) OR novel anticoagulants) OR antiplatelet) OR dabigatran) OR rivaroxaban) OR apixaban) OR warfarin) OR aspirin) OR heparin) OR dipyridamole)...
November 27, 2017: Urology
https://www.readbyqxmd.com/read/29189976/validation-of-knowledge-and-adherence-assessment-tools-among-patients-on-warfarin-therapy-in-a-saudi-hospital-anticoagulant-clinic
#12
Sireen Abdul Rahim Shilbayeh, Wejdan Ali Almutairi, Sarah Ahmed Alyahya, Nouf Hayef Alshammari, Eiad Shaheen, Alya Adam
Background Although it can result in serious complications due to its narrow therapeutic index, warfarin is widely used in the treatment and prevention of thromboembolic disorders. However, patients' adherence and knowledge are determinants of therapeutic success. Objective We sought to validate instruments to provide a reliable means of identifying gaps in patient understanding and nonadherence to inform targeted pharmacists' interventions to improve these measures. Methods A cross-sectional survey was conducted...
November 30, 2017: International Journal of Clinical Pharmacy
https://www.readbyqxmd.com/read/29179605/anticoagulant-use-in-atrial-fibrillation-and-risk-of-dementia-review-of-contemporary-knowledge
#13
Victoria Jacobs, Kevin G Graves, Thomas J Bunch
Atrial fibrillation (AF) is strongly associated with dementia, including idiopathic dementias such as Alzheimer's disease. The relative risk of dementia is highest in AF patients 70 years and younger, and the burden of exposure to arrhythmia appears to underlie part of the risk. Areas covered: Anticoagulation choices and approach influence dementia risk. In warfarin patients, inadequate time spent in therapeutic range is highly associated with the increased dementia risk long-term. This risk is further accentuated with frequent over anticoagulation in patients also receiving aspirin...
November 28, 2017: Expert Review of Cardiovascular Therapy
https://www.readbyqxmd.com/read/29178968/cohort-specific-imputation-of-gene-expression-improves-prediction-of-warfarin-dose-for-african-americans
#14
Assaf Gottlieb, Roxana Daneshjou, Marianne DeGorter, Stephane Bourgeois, Peter J Svensson, Mia Wadelius, Panos Deloukas, Stephen B Montgomery, Russ B Altman
BACKGROUND: Genome-wide association studies are useful for discovering genotype-phenotype associations but are limited because they require large cohorts to identify a signal, which can be population-specific. Mapping genetic variation to genes improves power and allows the effects of both protein-coding variation as well as variation in expression to be combined into "gene level" effects. METHODS: Previous work has shown that warfarin dose can be predicted using information from genetic variation that affects protein-coding regions...
November 24, 2017: Genome Medicine
https://www.readbyqxmd.com/read/29170877/oral-anticoagulant-dosing-administration-and-storage-a-cross-sectional-survey-of-canadian-health-care-providers
#15
Siavash Piran, Sam Schulman, Mohamed Panju, Menaka Pai
Direct oral anticoagulant (DOAC) use is increasing worldwide. However, if not taken or prescribed correctly, DOACs have serious side effects. It is crucial that healthcare providers (HCPs) offer patients accurate information and counselling around DOACs, to optimize safe and effective use. To assess knowledge around oral anticoagulant indication, dosing, storage, and administration, an electronic survey was distributed to HCPs across Canada from June to August 2017, with 18 questions on the practical use of oral anticoagulants...
November 23, 2017: Journal of Thrombosis and Thrombolysis
https://www.readbyqxmd.com/read/29120007/incidence-of-heterotopic-ossification-following-a-multimodal-pain-protocol-in-total-hip-arthroplasty-with-the-posterior-approach
#16
Peter B White, Prem N Ramkumar, Morteza Meftah, Narges Ghazi, Amar S Ranawat, Chitranjan S Ranawat
Heterotopic ossification (HO) is prevalent after total hip arthroplasty (THA). Oral nonsteroidal anti-inflammatory drugs and cyclooxygenase-2 (COX-2) inhibitors have reduced the incidence of HO; however, to the authors' knowledge, no studies have reported the incidence and severity of HO with a pain protocol highlighted by celecoxib in the pre- and postoperative period with a posterolateral approach. Between October 2014 and October 2015, a retrospective study was conducted of 687 consecutive primary THAs with minimum 1-year follow-up performed between January 2009 and December 2013...
November 8, 2017: Orthopedics
https://www.readbyqxmd.com/read/29095762/acquired-hemophilia-with-thrombosis-in-a-cancer-patient-an-unusual-presentation
#17
Senem Maral, Sule Mine Bakanay, Imdat Dilek
: Acquired hemophilia A (AHA) which presents with spontaneous severe intramuscular, mucosal and/or subcutaneous bleeding is a rare bleeding disorder. Even 50% of AHA patients are defined as idiopathic; 10% of cases are related with malignancy. Here, we present a case of AHA in a 43-year-old lady who was diagnosed with malignancy and venous thromboembolism on vena cava 2 years ago. To the best of our knowledge, this is the first report in literature presented with both acquired hemophilia and thrombosis associated with malignancy...
January 2018: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/29064182/anti-thrombotic-therapy-for-atrial-fibrillation-in-patients-with-chronic-kidney-disease-current-views
#18
REVIEW
Rugheed Ghadban, Greg Flaker, Natraj Katta, Martin A Alpert
Chronic kidney disease (CKD) occurs in approximately one-third of patients with non-valvular atrial fibrillation (AF). The presence of CKD, particularly advanced CKD, confers increased risk of both thromboembolism and major bleeding in this group of patients who are already at risk for ischemic stroke and systemic embolism and at risk of bleeding due to anticoagulation. Studies assessing the effect of warfarin on risk of ischemic stroke, systemic embolism, and major bleeding have produced disparate results, particularly in patients with advanced CKD including those treated with hemodialysis...
October 2017: Hemodialysis International
https://www.readbyqxmd.com/read/29030869/evaluation-of-the-predictive-performance-of-bleeding-risk-scores-in-patients-with-non-valvular-atrial-fibrillation-on-oral-anticoagulants
#19
S A Beshir, Z Aziz, L B Yap, K H Chee, Y L Lo
WHAT IS KNOWN AND OBJECTIVE: Bleeding risk scores (BRSs) aid in the assessment of oral anticoagulant-related bleeding risk in patients with atrial fibrillation. Ideally, the applicability of a BRS needs to be assessed, prior to its routine use in a population other than the original derivation cohort. Therefore, we evaluated the performance of 6 established BRSs to predict major or clinically relevant bleeding (CRB) events associated with the use of oral anticoagulant (OAC) among Malaysian patients...
October 13, 2017: Journal of Clinical Pharmacy and Therapeutics
https://www.readbyqxmd.com/read/28888264/availability-of-patient-decision-aids-for-stroke-prevention-in-atrial-fibrillation-a-systematic-review
#20
REVIEW
Elizabeth S O'Neill, Stuart W Grande, Ariel Sherman, Glyn Elwyn, Megan Coylewright
BACKGROUND: Atrial fibrillation is a common irregular heart rhythm that increases patients' risk of stroke. Aspirin, warfarin, direct oral anticoagulants, and an implantable device can reduce this risk. Given the availability of multiple comparable options, this decision depends on patient preferences and is appropriate for the use of decision aids and other efforts to promote shared decision making. The objective of this review was to examine the existence and accessibility of, as well as select outcomes associated with, published, formally evaluated patient decision aids for stroke prevention in atrial fibrillation...
September 2017: American Heart Journal
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