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http://dx.doi.org/10.1373/clinchem.2004.038034 | DOI Listing |
J Pers Med
September 2022
Department of Medicine, Surgery, and Dentistry, Scuola Medica Salernitana, University of Salerno, 84081 Baronissi, Italy.
Vitamin K antagonists (VKAs) are used in the prophylaxis and treatment of thromboembolic disorders. Despite a high efficacy, their narrow therapeutic window and high response variability hamper their management. Several patients experience fluctuations in dose−response and are at increased risk of over- or under-anticoagulation.
View Article and Find Full Text PDFFront Pharmacol
May 2017
Wolfson Centre for Personalized Medicine, Department of Molecular and Clinical Pharmacology, The University of LiverpoolLiverpool, United Kingdom.
Genetic polymorphisms in the gene encoding cytochrome P450 (CYP) 4F2, a vitamin K oxidase, affect stable warfarin dose requirements and time to therapeutic INR. is part of the gene cluster, which is highly polymorphic and exhibits a high degree of linkage disequilibrium, making it difficult to define causal variants. Our objective was to examine the effect of genetic variability in the gene cluster on expression of the individual genes and warfarin response.
View Article and Find Full Text PDFBlood Coagul Fibrinolysis
July 2015
Faculty of Medicine, Clinical Pathology Department, Ain Shams University, Cairo, Egypt.
Warfarin is the most widely prescribed anticoagulant drugs. Cytochrome P450-2C9 (CYP2C9) and vitamin K epoxide reductase-oxidaxe complex subunit 1 (VKORC1) contribute significantly to the variability of warfarin dose requirements among patients. We investigated the impact of CYP2C9 and VKORC1 polymorphisms on the variability of warfarin dosage requirements in Egyptian patients with acute coronary syndrome and their association with other nongenetic factors.
View Article and Find Full Text PDFOxid Med Cell Longev
February 2014
Department of Biomedical Sciences and Morpho-Functional Imaging, Polyclinic University of Messina, 98125 Messina, Italy.
In the environmental sensitivity-related illnesses (SRIs), multiple chemical sensitivity (MCS), chronic fatigue syndrome (FCS), and fibromyalgia (FM), the search for genetic polymorphisms of phase I/II xenobiotic-metabolizing enzymes as suitable diagnostic biomarkers produced so far inconclusive results, due to patient heterogeneity, geographic/ethnic differences in genetic backgrounds, and different methodological approaches. Here, we compared the frequency of gene polymorphisms of selected cytochrome P450 (CYP) metabolizing enzymes and, for the first time, the frequency of the xenobiotic sensor Aryl hydrocarbon receptor (AHR) in the three cohorts of 156 diagnosed MCS, 94 suspected MCS, and 80 FM/FCS patients versus 113 healthy controls. We found significantly higher frequency of polymorphisms CYP2C9∗2, CYP2C9∗3, CYP2C19∗2, CYP2D6∗4 and CYP2D6∗41 in patients compared with controls.
View Article and Find Full Text PDFIndian J Cancer
November 2011
Department of Radiotherapy, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India.
Aims: The aim of the present study is to investigate the association of polymorphism in cytochrome P450 2C9 (CYP2C9) with head and neck squamous cell carcinoma (HNSCC) and response in patients receiving chemoradiotherapy.
Materials And Methods: One hundred ten males suffering from locally advanced head and neck squamous cell carcinoma and an equal number of healthy controls were genotyped for CYP2C9FNx012 and CYP2C9FNx013, leading to poor metabolizers (PMs) by PCR-based RFLP. Each case was assessed thoroughly for treatment response following WHO criteria.
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