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MiR-34b/c rs4938723 Polymorphism Significantly Decreases the Risk of Digestive Tract Cancer: Meta-analysis

  • Ji, Tian-Xing (Department of Clinical Laboratory, the Second Affiliated Hospital of Guangzhou Medical University) ;
  • Zhi, Cheng (Department of Clinical Pathology, the Second Affiliated Hospital of Guangzhou Medical University) ;
  • Guo, Xue-Guang (Department of Clinical Laboratory, the Third Affiliated Hospital of Guangzhou Medical University) ;
  • Zhou, Qiang (Department of Clinical Laboratory, the Second Affiliated Hospital of Guangzhou Medical University) ;
  • Wang, Guo-Qiang (Department of Gastrointestinal Surgery, Lab of Surgery, the Second Affiliated Hospital of Guangzhou Medical University) ;
  • Chen, Bo (Department of Clinical Laboratory, the Second Affiliated Hospital of Guangzhou Medical University) ;
  • Ma, Fei-Fei (Department of VIP Obstetrics, the Second Affiliated Hospital of Guangzhou Medical University)
  • Published : 2015.09.02

Abstract

Background: Previous studies investigating the association between miR-34b/c rs4938723 polymorphism and cancer risk showed inconclusive. Here, we performed meta-analysis to investigate the association between miR- 34b/c rs4938723 polymorphism and digestive cancer risk. Materials and Methods: Literature database including PubMed, OVID, Chinese National Knowledge Infrastructure (CNKI) were searched for publications concerning the association between the miR-34b/c rs4938723 polymorphism and digestive cancer risk. Results: A total of 6 studies consisting of 3246 cases and 3568 controls were included in this meta-analysis. The combined analysis suggested the miR-34b/c rs4938723 polymorphism significantly reduced digestive cancer risk under allelic model, homogeneous co-dominant model and recessive model (C vs T: OR=0.88, 95%CI=0.82-0.95, p-value=0.001; CC vs TT: OR =0.67, 95%CI=0.57-0.80, p-value=0.000; CC vs TT/TC: OR=0.68, 95%CI=0.58-0.80, p-value=0.000). Q-test and I2 test revealed no significant heterogeneity in all genotype comparisons. The Begger's funnel plot and Egger's test did not show significant publication bias. Conclusions: The current evidence supports the conclusion that the miR-34b/c rs4938723 polymorphism decreases an individual's susceptibility to digestive cancers.

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