NAD(P)H: Quinone Oxidoreductase 1 (NQO1) C609T Gene Polymorphism Association with Digestive Tract Cancer: A Meta-analysis

  • Zhu, Cheng-Lin (Department of General Surgery, Anhui Provincial Hospital Affiliated with Anhui Medical University, Anhui Province Key Laboratory of Hepatopancreatobiliary Surgery) ;
  • Huang, Qiang (Department of General Surgery, Anhui Provincial Hospital Affiliated with Anhui Medical University, Anhui Province Key Laboratory of Hepatopancreatobiliary Surgery) ;
  • Liu, Chen-Hai (Department of General Surgery, Anhui Provincial Hospital Affiliated with Anhui Medical University, Anhui Province Key Laboratory of Hepatopancreatobiliary Surgery) ;
  • Lin, Xian-Sheng (Department of General Surgery, Anhui Provincial Hospital Affiliated with Anhui Medical University, Anhui Province Key Laboratory of Hepatopancreatobiliary Surgery) ;
  • Xie, Fang (Department of General Surgery, Anhui Provincial Hospital Affiliated with Anhui Medical University, Anhui Province Key Laboratory of Hepatopancreatobiliary Surgery) ;
  • Shao, Feng (Department of General Surgery, Anhui Provincial Hospital Affiliated with Anhui Medical University, Anhui Province Key Laboratory of Hepatopancreatobiliary Surgery)
  • 발행 : 2013.04.30


NAD(P)H: quinone oxidoreductase 1 (NQO1) C609T gene polymorphisms have been reported to influence the risk for digestive tract cancer (DTC) in many studies; however, the results remain controversial and ambiguous. We therefore carried out a meta-analysis of published case-control studies to derive a more precise estimation of any associations. Electronic searches were conducted on links between this variant and DTC in several databases through April 2012. Crude odds ratios (ORs) with 95% confidence intervals (CIs) were calculated to estimate the strength of associations in fixed or random effect models. Heterogeneity and publication bias were also assessed. A total of 21 case-control studies were identified, including 6,198 cases and 7,583 controls. Overall, there was a statistically significant association between the NQO1 C609T polymorphism and DTC risk (TT vs. CC: OR=1.224, 95%CI=1.055-1.421; TT/CT vs. CC: OR=1.195, 95%CI=1.073-1.330; TT vs. CT/CC: OR=1.183, 95%CI=1.029-1.359; T vs. C: OR=1.180, 95%CI=1.080-1.290). When stratified for tumor location, the results based on all studies showed the variant allele 609T might have a significantly increased risk of upper digest tract cancer (UGIC), but not colorectal cancer. In the subgroup analysis by ethnicity, we observed a significantly risk for DTC in Caucasians. For esophageal and gastric cancer, a significantly risk was found in both populations, and for colorectal, a weak risk was observed in Caucasians, but not Asians. This meta-analysis suggested that the NQO1 C609T polymorphism may increase the risk of DTC, especially in the upper gastric tract.


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