Association between VDR Gene Polymorphisms (rs 1544410, rs 7975232, rs 2228570, rs 731236 and rs 11568820) and Susceptibility to Breast Cancer in a Sample of So

Background Vitamin D receptor (VDR) is a key nuclear receptor that is associated with the risk and progression of breast cancer (BC). Objectives The present study investigated the Fok1, Bsm1, Taq1 and Cdx2 polymorphisms in the VDR gene and susceptibility to BC in a sample of Southeastern Iranian population. Methods This case-control study was conducted on 180 women with BC and 178 age-matched healthy women. RFLP-PCR method was used for analysis of Bsm1 (rs 1544410), Apa1 (rs 7975232), Fok1 (rs 2228570) and Taq1 (rs 731236) and also TETRA-ARMS method for Cdx2 (rs 11568820). Results No significant correlation was found between polymorphisms of Taq1, Fok1 and Apa1 with BC, but was for Bsm1 (odds ratio (OR) = 3.452, 95% CI 1.769 - 6.738; P < 0.001). Also, there was a significant correlation between the case and control groups for Cdx2 (OR = 3.720, 95% CI 2.224 - 6.225; P < 0.001) and allele A in Cdx2 had just significant correlation with BC. Conclusions The present study findings showed that there were significant correlations between Bsm1 and Cdx2 polymorphisms with BC in women of Sistan and Baluchestan Province (southeastern Iran). Also, signals of Rs1544410-Bsm1 and Rs11568820-Cdx2 positions were difference with routes of estrogen and progesterone per person and they probably act independently.