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  • Title: SNPs in microRNA-binding sites in the ITGB1 and ITGB3 3'-UTR increase colorectal cancer risk.
    Author: Ye P, Li Z, Jiang H, Liu T.
    Journal: Cell Biochem Biophys; 2014 Sep; 70(1):601-7. PubMed ID: 24777809.
    Abstract:
    The purpose of the study was to investigate the potential associations between single-nucleotide polymorphisms (SNPs) in microRNA (miRNA)-binding sites in the integrin beta-1 (ITGB1) gene and integrin beta-3 (ITGB3) gene 3'-untranslated regions, and colorectal cancer (CRC) susceptibility in a Chinese population. A hospital-based case-control study was performed in 200 patients with CRC and 200 matched healthy donors. Two SNPs in miRNA binding of ITGB1 and ITGB3 genes (rs17468 and rs2317676) were genotyped by polymerase chain reaction-restrict fragment length polymorphism assay. The association between genotypes and CRC risk was evaluated by computing the odds ratio (OR) and 95 % confidence interval (CI) from multivariate unconditional logistic regression analyses. The frequency of the T genotype in ITGB1 rs17468 and G genotype in ITGB3 rs2317676 occurred more frequently in CRC patients than in controls (P < 0.05). We found that CT and TT genotypes of rs17468 were associated with a significantly increased risk of CRC (OR = 1.67, 95 % CI = 1.090-2.559 for CT + TT vs. CC), also the AG and GG genotype in ITGB3 rs2317676 (OR = 1.65, 95 % CI = 1.114-2.458 for AG + GG vs. AA). In conclusion, our results showed that both the ITGB1 rs17468 SNP and ITGB3 rs2317676 SNP were associated with an increased risk of CRC, which suggests that these 2 SNPs might contribute to CRC risk in a Chinese population.
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