Zusammenfassung Die Identifizierung der Vitamin-K-Epoxid-Reduktase (VKORC1) hat maßgeblich zu einem besseren Verständnis des Vitamin-K-Zyklus beigetragen. Das VKORC1-Protein konnte als das molekulare Target der Cumarine charakterisiert werden und stellt das geschwindigkeitsbestimmende Enzym des Vitamin-K-Zyklus und möglicherweise die alleinige Komponente der VKOR-Aktivität dar. Mutationen und P...

Warfarin is an oral anticoagulant that is widely prescribed to prevent thromboembolic events in persons at increased risk. The optimal dose is difficult to establish because it can vary 10-fold among individuals due to clinical and demographic factors. Testing for variants of the vitamin K epoxide reductase complex 1 (VKORC1) and cytochrome P450 2C9 (CYP2C9) genes has been proposed for use in g...

OBJECTIVE The aim of this study was to investigate whether genetic variants can identify patients with venous thromboembolism (VTE) at an increased risk of bleeding with warfarin. METHODS Hokusai-venous thromboembolism (Hokusai VTE), a randomised, multinational, double-blind, non-inferiority trial, evaluated the safety and efficacy of edoxaban versus warfarin in patients with VTE initially tr...

CYP2C9 enzyme activity is involved in the metabolism of substances related to colorectal cancer (CRC), and it is functionally linked to a genetic polymorphism. Two allelic variants of the CYP2C9 gene, namely CYP2C9*2 and CYP2C9*3, differ from wild-type CYP2C9*1 by single amino acid substitutions. These mutated alleles encode enzymes with altered properties that are associated with impaired meta...

Abstract Background To analyze whether the cytochrome P450 enzyme 2C9*3 (CYP2C9*3) and angiotensin II receptor 1 (AGTR1) (1166A>C) gene polymorphisms are associated with risk of essential hypertension (EH) antihypertensive effect irbesartan. Methods A total 2,057 EH patients 286 healthy controls were enrolled for genotyping in which 598 given irbesartan 150 mg/day 4 weeks. Blood pressure...

Acetyl salicylic acid (ASA) is metabolized by UDP-glucuronosyltransferase 1A6 (UGT1A6), cytochrome P4502C9 (CYP2C9), and N-acetyl transferase 2 (NAT2). Variations in the activities of these enzymes may modulate adverse ASA-related symptoms such as urticaria. We examined whether polymorphisms in the UGT1A6, CYP2C9, and NAT2 genes are related to ASA-intolerant urticaria (AIU). The genotypes of 14...

Abstract Saliva is widely used for clinical and laboratory analysis. This study proposed to use DNA extracted from saliva genotyping pharmacokinetics of piroxicam. A fast efficient method was determine relevant allelic variants CYP2C9 (*2 *3), since genetic factors can influence in non-steroidal anti-inflammatory drugs (NSAIDs) metabolization. Extract All Reagents Kit® extraction performed usin...

BACKGROUND Patients differ in responses to warfarin, which is commonly prescribed to treat thromboembolic events. Genetic variations in the cytochrome P450, family 2, subfamily C, polypeptide 9 (CYP2C9), vitamin K epoxide reductase complex, subunit 1 (VKORC1), and gamma-glutamyl carboxylase (GGCX) genes have been shown to contribute to impaired metabolism of warfarin. METHODS We designed a cu...