Abstract
Background This study aimed to investigate the association of rs12976445 polymorphism in the promoter region of miR-125a and rs2114358 in the precursor region of miR-1206 to breast cancer susceptibility. Method A total of 230 participants (110 breast cancer and 120 controls) enrolled in this study and extracted genomic DNA. The genotypes were determined by the Tetra-ARMS method. The allele and genotype frequencies were determined. Results Allele variation in the rs12976445 (miR-125a) sequence increased the risk of breast cancer; a significant relationship was observed between breast cancer and allele change in individuals with the C allele (p = 0.01). However, allele variation in the rs2114358 (miR-1206) decreased the risk of breast cancer in individuals with allele A (p = 0.01). In silico study showed that allele change was associated with a reduction in structural stability. Conclusion Therefore, the rs12976445 variant can be considered a risk factor for breast cancer, and the rs2114358 variant is a protective factor against it.
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