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A genetic variant in the flanking region of miR-182 could decrease the susceptibility to the breast cancer risk in the iranian population

Abstract Breast cancer is one of the most malignant tumors in the world. It is, in fact, the second leading cause of cancer death in women. Recent research has identified the role of miR-182 in this disease as an oncogene agent. In this study, the association of rs4541843 in the flanking region of the miR-182 sequence with the susceptibility to breast cancer risk has been studied in the Iranian population. By using the PCR_RFLP, the genotype rs4541843 was determined in 161 patients and 164 control subjects. The genotypes of the individuals were analyzed statistically to find the association between rs4541843 and the breast cancer incidence and its pathological characteristics. The results revealed that due to the dominance of the G allele, the frequency of GG + AG genotypes, as compared with AA, had a significant correlation with the incidence of this disease in controls and cases (P = 0.022; OR = 0.523). Moreover, the genotypes AG and AA could significantly decrease the susceptibility to the breast cancer risk; also in the presence of the A allele (OR, 0.565; P = 0.015), the incidence of the disease could be decreased. Our results indicated that this SNP was associated with the breast cancer risk of the Iranian population. We suppose that rs4541843 may influence the processing of the mature miRNA by affecting the cleavage of Drosha. Therefore, this SNP can be considered as a candidate genetic marker for the susceptibility to breast cancer in the Iranian women.