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A functional polymorphism in MIR196A2 is associated with risk and prognosis of gastric cancer

Authors

  • Shizhi Wang,

    1. Department of Environmental Genomics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Cancer Center, Nanjing Medical University, Nanjing, China
    2. Department of Genetic Toxicology, The Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
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  • Guoquan Tao,

    1. Department of Environmental Genomics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Cancer Center, Nanjing Medical University, Nanjing, China
    2. Department of Genetic Toxicology, The Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
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  • Dongmei Wu,

    1. Department of General Surgery, The Huai'an First People's Hospital, Nanjing Medical University, Huai-an, China
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  • Haixia Zhu,

    1. Core Laboratory of Nantong Cancer Hospital, Nantong, China
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  • Yan Gao,

    1. Department of Environmental Genomics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Cancer Center, Nanjing Medical University, Nanjing, China
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  • Yongfei Tan,

    1. Department of Surgery, Yixing People's Hospital, Yixing, China
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  • Meilin Wang,

    1. Department of Environmental Genomics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Cancer Center, Nanjing Medical University, Nanjing, China
    2. Department of Genetic Toxicology, The Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
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  • Weida Gong,

    1. Department of General Surgery, Yixing Tumor Hospital, Yixing, China
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  • Yan Zhou,

    1. Department of Surgery, Yixing People's Hospital, Yixing, China
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  • Jianwei Zhou,

    1. Department of Genetic Toxicology, The Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
    2. Department of Molecular Cell Biology and Toxicology, School of Public Health, Cancer Center of Nanjing Medical University, Nanjing, China
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  • Zhengdong Zhang

    Corresponding author
    1. Department of Environmental Genomics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Cancer Center, Nanjing Medical University, Nanjing, China
    2. Department of Genetic Toxicology, The Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
    • Department of Environmental Genomics, School of Public Health, Nanjing Medical University, 818 East Tianyuan Road, Nanjing 211166, China.

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  • Disclosure statement: The authors declare no conflicts of interest.
  • Shizhi Wang, Dongmei Wu, and Guoquan Tao contributed equally to this work.

Abstract

Genetic variations in miRNAs have been demonstrated to be capable of altering miRNA expression, consequently affecting many cancer-related biological processes. The MIR196A2 rs11614913 (T > C) polymorphism has been reported to be associated with various cancers development and progression. In our study, we aim to explore whether this polymorphism is relevant to the genetic susceptibility and prognosis of gastric cancer in a Chinese population. We analyzed the correlations of rs11614913 polymorphism with gastric cancer susceptibility in test and validation sets. The test set comprised 749 cases and 900 controls, while the validation set enrolled 940 cases and 1046 controls. Moreover, we evaluated the association between the polymorphism and gastric cancer prognosis in the validation set with follow-up information. The variant rs11614913 CC genotype was associated with a significantly reduced risk of gastric cancer in both sets (adjusted odds ratio [OR] = 0.78, 95% confidence interval [CI] = 0.62–0.99 for the test set and 0.64, 0.52–0.80 for the validation set) compared with the CT/TT genotypes. Furthermore, the CC genotype was associated with a significantly increased survival of gastric cancer compared with the CT/TT genotypes (adjusted hazard ratio [HR] = 0.72, 95% CI = 0.55–0.95), and the association was more prominent among patients with non-cardia gastric cancer than those with cardia gastric cancer (adjusted HR = 0.57, 95% CI = 0.40–0.83 for NCGC and 1.00, 0.65–1.53 for CGC). Our results suggested that the genetic variation of MIR196A2 may play a role in gastric cancer tumorigenesis. © 2013 Wiley Periodicals, Inc.

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