Cytochrome P450 2A13 3375C>T gene polymorphism in a Turkish population

Abstract

Background and Aims: The polymorphisms in genes encoding xenobiotic-metabolizing enzymes may change the metabolic activation of various xenobiotics and therefore may affect individuals’ susceptibility to xenobiotics-induced toxic effects. Cytochrome P450 2A13 (CYP2A13) is an important CYP enzyme predominantly expressed in the human respiratory tract. CYP2A13 metabolizes the xenobiotics and bioactivation of several carcinogens. The present study aimed to determine the allele and genotype frequencies of CYP2A13 3375C>T polymorphism in a Turkish population and also to compare the obtained results with those of various populations. Methods: CYP2A13 3375C>T polymorphism was determined in 93 healthy Turkish individuals using the polymerase chain reaction-restriction fragment length method. Results: The frequencies of CC, CT and TT genotypes were 89.2%, 9.7% and 1.1%, respectively. The frequencies of C and T alleles were 94.1% and 5.9%, respectively. The genotype frequencies did not deviate from the Hardy-Weinberg equilibrium. Significant differences were observed when comparing the results found with those of various populations, especially those of populations with black ancestry (excluding Tunisian). Conclusion: This study can provide valuable data for further studies investigating the role of this polymorphism concerning the susceptibility to xenobiotics-induced toxic effects, including cancer, and may be used as a control group for such studies and also may contribute to toxicogenetic and epidemiological studies.