OBJECTIVES As the most frequently prescribed anticoagulant, warfarin has large inter-individual variability in dosage. Genetic polymorphisms could largely explain the differences in dosage requirement. rs9923231 (VKORC1), rs7294 (VKORC1), rs1057910 (CYP2C9), rs2108622 (CYP4F2), and rs699664 (GGCX) involved in the warfarin action mechanism and the circulatory vitamin K were selected to investiga...

BACKGROUND Despite its shortcomings, warfarin is still the most commonly prescribed anticoagulant to prevent thromboembolism in children. In adults, numerous studies confirmed the robust relationship between warfarin maintenance doses and single nucleotide polymorphisms of cytochrome P450 2C9 (CYP2C9), vitamin K epoxide reductase (VKORC1), and cytochrome P450 4F2 (CYP4F2). However, their effect...

BACKGROUND AND AIM This study reports the prevalence of five clinically significant variants associated with increased risk of cardiovascular disorders, and variable responses of individuals to commonly prescribed cardiovascular drugs in a South Indian population from the state of Kerala. MATERIALS AND METHODS Genomic DNA isolated from 100 out-patient samples from Kerala were sequenced to exa...

BACKGROUND The polymorphisms of VKORC1 and CYP2C9 play increasingly important roles in the inter-individual variability in warfarin dose. This study aimed to evaluate the feasibility of clinical application of pharmacogenetic-based warfarin-dosing algorithm in patients of Han nationality with rheumatic heart disease after valve replacement in a randomized and controlled trial. METHODS One hun...

Coumarin derivatives, such as warfarin, acenocoumarol and phenprocoumon, are commonly prescribed as oral anticoagulants for the treatment of thromboembolic disorders. Therapy with coumarin derivatives is most effective when the international normalized ratio (INR) is kept within a narrow range. Prescribing of these drugs is difficult because of their narrow therapeutic window and the wide inter...

Warfarin is a vitamin K antagonist that genetic and non-genetic factors affected on its doserequirement in the patients with cardio vascular disease. The aim of this study was whetherthe APOE and VKORC1 polymorphisms influence on warfarin dose requirements in the partof Iranian patients. Blood samples were collected from 86 warfarin-treated patients. Afterextraction of genomic DNA, the VKORC1 (...

BACKGROUND Genetic determinants of drug response remain stable throughout life and offer great promise to patient-tailored drug therapy. The adoption of pharmacogenetic (PGx) testing in patient care requires accurate, cost effective and rapid genotyping with clear guidance on the use of the results. Hence, we evaluated a 32 SNPs panel for implementing PGx testing in clinical laboratories. MET...