Association of polymorphic loci of genes miR-27a rs895819 and miR-146a rs2910164 with the risk of development of ovarian cancer

Ovarian cancer remains one of the most common causes of death from gynecological cancer in women worldwide. Its course depends on many factors, including genetic and epigenetic disorders. MicroRNAs are currently considered one of the most promising prognostic and diagnostic markers for solid tumors. The aim of the study was to analyze the association of polymorphic loci of the microRNA-27a rs895819 and microRNA-146a rs2910164 genes with the risk of developing ovarian cancer. Material and Methods. Genotyping was performed by determining single nucleotide polymorphisms using the KASP method. For pairwise comparison of the frequency of occurrence of genotypes and alleles in patients with ovarian cancer and in the control group, the χ2 test was used for 2×2 contingency tables. If there are statistically significant differences between the compared samples, the odds ratio (OR) and the boundaries of the 95 % confidence interval (95 % CI) were assessed. Quantitative characteristics were compared using the Mann – Whitney test (in the case of two groups) and the Kruskal – Wallis test (in the case of three groups). Results. As a result of a comparative analysis of the distribution of frequencies of alleles and genotypes of the polymorphic locus rs2910164 of the miR-146a gene in a sample of patients with ovarian cancer and healthy individuals, it was shown that carriage of the homozygous genotype GG and allele G is a risk factor for women of Tatar ethnicity. No significant differences were detected in the distribution of allele frequencies and genotypes of the rs895819 polymorphic locus of the miR-27a gene. Conclusions . The polymorphic locus of microRNA-146a rs2910164 is associated with an increased risk of ovarian cancer in women of Tatar ethnicity.