BackgroundThe level of hormones and genetic predispositions increase the risk of breast cancer. Genetic variations in the genes of the telomere pathway, which can influence the activity of telomerase, may be decisive for the development of breast cancer. Due to a lack of studies on TERT gene polymorphisms (rs2736100 and rs2736109) in the Iranian population, in this study we investigated the association of these polymorphisms with breast cancer in the Iranian population. Patients & methodsA total of 300 individuals participated in this research, which included 150 breast cancer patients and 150 healthy controls. Participants' blood samples were collected before the beginning of treatment. The RFLP-PCR procedure was used for the genotyping of TERT gene rs2736109 and rs2736100 polymorphisms. ResultsThere are statistically significant differences in the age of menarche and the age of menopause (P-value <0.05). For rs2736100, the frequency of TT genotype in the case and control groups was 22.7 % and 16.7 %, respectively. However, these differences were not statistically significant (P-value >0.05). For rs2736109, the frequency of the AA genotype was lower in the case group (12.0 % vs. 19.3 %). These differences reach a statistically significant level (P-value = 0.012). Individuals carrying AA genotype have a lower risk of suffering from breast cancer (odds ratio = 0.403, 95 % CI: 0.196–0.827). ConclusionOur findings suggest that the rs27326109 polymorphism in the TERT gene is associated with a decreased risk of breast cancer. Also this study reveals that age of menarche and age of menopause are associated with risk of this disease.
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