DNA Repair Gene Polymorphisms at XRCC1, XRCC3, XPD, and OGG1 Loci in the Hyderabad Population of India

Background: DNA repair is one of the crucial defense mechanism against mutagenic exposure. Inherited SNPs of DNA repair genes may contribute to variation in DNA repair capacity and susceptibility to cancer. Due to thepresence of these variants, inter-individual and ethnic differences in DNA repair capacity have been established in various populations. India harbors enormous genetic and cultural diversity. Materials and
Methods: In the present study we aimed to determine the genotypes and allele frequencies of XRCC1 Arg399Gln (rs25487), XRCC3 Thr241Met (rs861539), XPD Lys751Gln (rs13181), and OGG1 Ser326Cys (rs1052133) gene polymorphisms in 186 healthy individuals residing in the Hyderabad region of India and to compare them with HapMap and otherpopulations. Results and
Conclusions: The genotype and allele frequency distribution at the four DNA repairgene loci among Hyderabad population of India revealed a characteristic pattern. Comparison of these genepolymorphisms with other populations revealed a distinctiveness of Hyderabad population from the Deccanregion of India. To the best of our knowledge, this is the first report of such DNA repair gene polymorphisms inthe Deccan Indian population.