Cytochrome p-450 and VKORC1 genetic polymorphisms in nenets - an indigenous ethnic group in the Arctic

Abstract

Resilience of indigenous ethnic groups to adverse climatic conditions of the Arctic is genetically determined. Moreover, genes determine the ability to metabolize environmental substances. This warrants research on ethnic variations in cytochrome P-450 and VKORC1 genetic polimorphisms with further going aim to develop personalized pharmacotherapy for the indigenous ethnic groups living in the Arctic. The aim was to study the prevalence of genotypes and allelic variants in CYP2C9, CYP2C19, VKORC1 genes in Nenets - an indigenous ethnic group in the Arctic. (n = 32) under conditions of permanent island living. Methods. A total population (n = 32) of the Vaygach island (70°01' N 59°33' E) participated in a cross-sectional study. Peripheral venous blood samples were taken. Genomic DNA was extracted from peripheral venous blood leukocytes using the express method. Results. SS genotype was the most common variant (90.63 %) of the CYP2C9*2 (rs1799853) gene. AA genotype of the CYP2C9*3 (rs1057910) gene was detected in 100 % cases. GG and GA genotypes of the VKORC1 G3730A (rs7294) gene were detected in 56.3 % and 43.7 % of cases, respectively, while no homozygous allelic polymorphism for the pathological allele was found. Conclusions. The study provides the evidence on the prevalence of genotypes and allelic variants in CYP2C9, CYP2C19, VKORC1 genes in Nenets of the Vaygach island. Replication of these results in other Nenets populations is warranted.