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  • Title: The role of CYP2C9 gene polymorphisms on anticoagulant therapy after heart valve replacement.
    Author: Yildirim H, Tamer L, Sucu N, Atik U.
    Journal: Med Princ Pract; 2008; 17(6):464-7. PubMed ID: 18836275.
    Abstract:
    OBJECTIVE: The aim of the present study was to investigate the role of CYP2C9 gene polymorphisms after heart valve replacement in a group of patients on warfarin therapy. MATERIALS AND METHODS: The study population consisted of 74 patients with heart valve replacement. Peripheral blood was collected into evacuated tubes containing EDTA, and DNA was extracted from circulating leukocytes by using a high pure PCR template preparation kit. CYP2C9*2, CYP2C9*3 alleles were detected by using real-time PCR. RESULTS: The patients with CYP2C9*1/*3 and CYP2C9*2/*3 genotypes were taking 28.21 and 24.47 mg, respectively, as mean weekly warfarin dose, whereas patients with CYP2C9*1/*1 genotype were taking 33.90 mg. CONCLUSION: The data show that patients with CYP2C9*1/*3 and CYP2C9*2/*3 genotypes needed a lower maintenance dose of warfarin than patients with CYP2C9*1/*1 wild-type genotype.
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