MIR196A2 rs11614913 contributes to susceptibility to colorectal cancer in Iranian population: A multi-center case-control study and meta-analysis
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Maturation of MIR196A2 as a gene regulator with a high potential for targeted cancer therapy can be modulated by the rs11614913 polymorphism. Several studies evaluating the association between this variant and pathogenesis of colorectal cancer (CRC) found significant results in various ethnic groups. This study aimed at investigating this relationship in a large sample size of Iranians as well as in a systematic review and meta-analysis of the pooled data of the current study with previous reports from Iran and other populations. After extraction of genomic DNA from the formalin-fixed paraffin-embedded tissues and whole blood of 2150 subjects (42% CRC patients), the rs11614913 was genotyped in both cases and controls. Furthermore, we conducted a meta-analysis of the present case-control study together with a previous report from Iranian population. The results of case-control study identified significant association between the rs11614913 and susceptibility to CRC [TT vs. CC: 1.58 (1.26-1.98), p < 0.01; TT vs. CT: 3.94 (3.07-5.05), p < 0.01; TT vs. CC + CT: 0.70 (0.59-0.83), p < 0.01; and CT + TT vs. CC: 1.43 (1.21-1.70), p < 0.01]. After correction of the meta-analysis results by using Bonferroni protocol, no significant association was observed in overall and in Asians [T vs. C: 1.19 (1.00-1.43), p = 0.05 and 1.14 (0.83-1.56), p = 0.43, respectively], whereas association was significant in Caucasians [T vs. C: 1.14 (1.04-1.25), p = 0.004] influenced by the data from Iran [T vs. C: 1.15 (1.03-1.29), p = 0.02 and TT vs. CC + CT: 0.73 (0.60-0.87), p = 0.003]. In conclusion, MIR196A2 rs11614913 might play a potential role in the pathogenesis of CRC in Iranian population. é 2018 Elsevier B.V.
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