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A Genetic Variant in miR-196a2 Increased Digestive System Cancer Risks: A Meta-Analysis of 15 Case-Control Studies

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  • Jing Guo
  • Mingjuan Jin
  • Mingwu Zhang
  • Kun Chen

Abstract

Background: MicroRNAs (miRNAs) negatively regulate the gene expression and act as tumor suppressors or oncogenes in oncogenesis. The association between single nucleotide polymorphism (SNP) in miR-196a2 rs11614913 and the susceptibility of digestive system cancers was inconsistent in previous studies. Methodology/Principal Findings: An updated meta-analysis based on 15 independent case-control studies consisting of 4999 cancer patients and 7606 controls was performed to address this association. It was found that miR-196a2 polymorphism significantly elevated the risks of digestive system cancers (CT vs. TT, OR = 1.25, 95% CI = 1.07–1.45; CC vs. TT, OR = 1.38, 95% CI = 1.13–1.67; CC/CT vs. TT, OR = 1.29, 95% CI = 1.10–1.50; CC vs. CT/TT, OR = 1.14, 95% CI = 1.01–1.30; C vs. T, OR = 1.15, 95% CI = 1.05–1.26). We also found that variant in miR-196a2 increased the susceptibility of colorectal cancer (CRC) (CT vs. TT, OR = 1.23, 95% CI = 1.04–1.44; CC vs. TT, OR = 1.32, 95% CI = 1.08–1.61; CC/CT vs. TT, OR = 1.25, 95% CI = 1.07–1.46; C vs. T, OR = 1.15, 95% CI = 1.05–1.28), while the association in recessive model (CC vs. CT/TT, OR = 1.16, 95% CI = 0.98–1.38) showed a marginal significance. Additionally, significant association between miR-196a2 polymorphism and increased risk of hepatocellular cancer (HCC) was detected. By stratifying tumors on the basis of site of origin, source of controls, ethnicity and allele frequency in controls, elevated cancer risks were observed. Conclusion/Significance: Our findings suggest the significant association between miR-196a2 polymorphism and increased susceptibility of digestive system cancers, especially of CRC, HCC and Asians. Besides, C allele may contribute to increased digestive cancer risks.

Suggested Citation

  • Jing Guo & Mingjuan Jin & Mingwu Zhang & Kun Chen, 2012. "A Genetic Variant in miR-196a2 Increased Digestive System Cancer Risks: A Meta-Analysis of 15 Case-Control Studies," PLOS ONE, Public Library of Science, vol. 7(1), pages 1-7, January.
    • Handle: RePEc:plo:pone00:0030585
    DOI: 10.1371/journal.pone.0030585
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    References listed on IDEAS

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    1. Haiyan Chu & Meilin Wang & Danni Shi & Lan Ma & Zhizhong Zhang & Na Tong & Xinying Huo & Wei Wang & Dewei Luo & Yan Gao & Zhengdong Zhang, 2011. "Hsa-miR-196a2 Rs11614913 Polymorphism Contributes to Cancer Susceptibility: Evidence from 15 Case-Control Studies," PLOS ONE, Public Library of Science, vol. 6(3), pages 1-6, March.
    2. Wei Xu & Jijun Xu & Shifeng Liu & Bo Chen & Xueli Wang & Yan Li & Yun Qian & Weihong Zhao & Jianqing Wu, 2011. "Effects of Common Polymorphisms rs11614913 in miR-196a2 and rs2910164 in miR-146a on Cancer Susceptibility: A Meta-Analysis," PLOS ONE, Public Library of Science, vol. 6(5), pages 1-7, May.
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