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  • Title: Association between tumor necrosis factor-α rs1800629 polymorphism and risk of gastric cancer: a meta-analysis.
    Author: Zhu F, Zhao H, Tian X, Meng X.
    Journal: Tumour Biol; 2014 Mar; 35(3):1799-803. PubMed ID: 24142527.
    Abstract:
    Gastric cancer is mainly initiated by inflammation and chronic superficial gastritis, and tumor necrosis factor-α (TNF-α) is an inflammatory cytokine which plays an important role in the inflammation. TNF-α rs1800629 G/A polymorphism was proposed to be associated with gastric cancer risk, but previous studies on Caucasians reported conflicting results. We performed a meta-analysis to comprehensively assess the association between TNF-α rs1800629 polymorphism and gastric cancer risk in Caucasians. The pooled odds ratio (OR) with 95% confidence interval (95% CI) was calculated to assess the association. Eleven case-control studies with 7,427 subjects were finally included into the meta-analysis. Overall, TNF-α rs1800629 polymorphism was significantly associated with the increased risk of gastric cancer under four genetic comparison models (A versus G: OR = 1.32, 95% CI 1.12-1.56, P = 0.001; AA versus GG: OR = 1.76, 95% CI 1.37-2.26, P < 0.001; AA versus GG/GA: OR = 1.62, 95% CI 1.27-2.07, P < 0.001; AA/GA versus GG: OR = 1.35, 95% CI 1.14-1.60, P = 0.001). Meta-analysis of those studies with high quality showed that TNF-α rs1800629 polymorphism was still significantly associated with the increased risk of gastric cancer under four genetic comparison models. There was no risk of publication bias in the meta-analysis. The meta-analysis suggests that TNF-α rs1800629 polymorphism is associated with the increased risk of gastric cancer in Caucasians.
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