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Review Article

. 2020; 11(1): 9-11


The relation between CYP2C9 gene polymorphism and warfarin dosing in an Iranian population

Saeed Abtahi, Daryoush Rostami, Narges Ajilain, Thahmine Zafari, Reza Jafarzadeh Esfehani, Arash Poursheikhani, Mohammad Soudyab, Naseh Pahlavani, Ariane Sadr-Nabavi.

Abstract
Background: Warfarin is a common anticoagulant agent which is widely used in many countries. However, Warfarin is one of
those drugs which requires close monitoring and dosing while inappropriate could lead to hemorrhagic epoxides. Achieving
a desirable international normalized ratio (INR) range depends on various demographic factors and genetic factors are now
becoming an emerging area of interest in cardiovascular research. CYP2C9 is a gene encoding a member of cytochrome P450
enzyme which metabolizes many drugs. Genetic variation in this gene has been linked to abruption in Warfarin drug response. In
present study the effect of genetic polymorphisms in CYP2C9 gene and its response to Warfarin is investigated.
Methods: Total of 95 patients who had cardiovascular diseases and were using Warfarin for at least 3 months were enrolled in this
cross sectional study. Their DNA was extracted and the genetic polymorphisms in CYP2C9 gene (RS1799853 as CYP2C*2 and
RS1057910 as CYP2C9*3) were evaluated by using polymerase chain reaction and sequencing. Kruskal-Wallis test were used for
comparing the Warfarin values between the genotype groups. The SPSS software 22v was used for data analysis.
Results: Among the study population the prevalence of genotypes were as follow: CC/AA: 61.1, CT/AA: 17.9, CT/AC: 1.1, CC/AC:
3.6, TT/AA: 2.3, CC/CC: 0%. The CC/AA and CC/AC variants were related to Warfarin dose (P

Key words: Anticoagulants; Genotype; Polymorphism, Genetic; Warfarin


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