摘要目的 探讨着色性干皮病C(XPC)基因939氨基酸位点Lys/Gln多态性与胃癌易感性的关系.方法 计算机检索PubMed、Cochrane Library、Elsevier、Springer-Verlag、中国期刊全文数据库(CNKI)、中国生物医学文献数据库(CBM)、维普中文科技期刊数据库(VIP)及万方医药期刊全文数据库,检索时间为建库至2015年9月,收集有关XPC Lys939Gln(A/C)基因多态性与胃癌易感性的病例对照研究.由两名评价员按照纳入、排除标准独立筛选文献,进行质量评价.采用STATA 12.0软件进行Meta分析,计算比值比(OR)及95％可信区间(CI)进行关联强度评价,并进行亚组、敏感性分析和发表偏倚的检测.结果 本研究共纳入7个病例对照研究,包括2 336例胃癌患者和3 502例健康对照.Meta分析结果显示,与等位基因A比较,等位基因C可增加胃癌的风险(OR=1.09,95％ CI为1.01 ～1.18,Z=2.12,P=0.034);与基因型AA相比,纯合子模型(CC)和显性模型(CC+ AC)基因型可增加罹患胃癌风险(CC vs.AA:OR=1.19,95％ CI为1.00 ～1.42,Z=2.00,P=0.046;CC+ AC vs.AA:OR=1.12,95％ CI为1.00～1.25,Z=2.03,P=0.042).对研究人群和对照来源进行亚组分析结果显示,在亚洲人群和社区来源的对照中,XPC Lys939Gln(A/C)基因多态性与胃癌风险有关.亚洲人群中,C vs.A:OR=1.10,95％ CI为1.01 ～ 1.20,Z=2.28,P=0.023;CC vs.AA:OR =1.21,95％ CI为1.01 ～1.46,Z =2.02,P=0.043;CC+AC vs.AA:OR=1.13,95％ CI为1.01 ～ 1.27,Z=2.11,P=0.035.社区来源的对照组中,C vs.A:OR =1.11,95％ CI为1.01 ～1.21,Z=2.25,P=0.024;CC vs.AA:OR =1.23,95％ CI为1.02 ～ 1.50,Z=2.12,P=0.034.结论 XPC Lys939Gln(A/C)基因多态性可能与罹患胃癌的易感性有关.等位基因C、基因型CC和CC +AC可能增加胃癌的风险.

abstractsObjective To explore the association between Xeroderma pigmentosum complementation C group (XPC) Lys939Gln (A/C) gene polymorphism and the susceptibility of gastric cancer.Methods By searching PubMed,Cochrane Library,Elsevier,Springer-Verlag,China National Knowledge Infrastructure,Chinese Biomedical Literature Data,VIP Database and Wanfang Database,all eligible case-control studies published up to September 2015 were selected and the quality of each article was valuated by two reviewers independently according to the inclusion and exclusion criteria.Meta-analysis was performed by using STATA 12.0 software.Odds ratio (OR) and 95％ confidence interval (CI) were calculated.The text was estimated for the subgroup analysis,sensitivity analysis and publication bias test.Results A total of 7 case-control studies were included,including 2 336 cases with gastric cancer and 3 502 controls.The Meta-analysis showed that compared with the allele A,the allele C increased the risk of gastric cancer (OR =1.09,95％ CI:1.01-1.18,Z =2.12,P =0.034);compared to the genotype AA,the homozygous model (CC) and dominant model (CC + AC) also increased the risk of gastric cancer (CC vs.AA:OR =1.19,95％ CI:1.00-1.42,Z =2.00,P=0.046;CC+ACvs.AA:OR=1.12,95％CI:1.00-1.25,Z=2.03,P=0.042).The Meta-analysis showed the statistical significance between XPC Lys939Gln (A/C) gene polymorphism and the gastric cancer risk in subgroup of Asian people (C vs.A:OR =1.10,95％ CI:1.01-1.20,Z =2.28,P =0.023;CC vs.AA:OR=l.21,95％CI:1.01-1.46,Z=2.02,P=0.043;CC +AC vs.AA:OR =1.13,95％ CI:1.01-1.27,Z =2.11,P =0.035) and the source of community in the control group (C vs.A:OR =1.11,95％ CI:1.01-1.21,Z=2.25,P =0.024;CC vs.AA:OR =1.23,95％ CI:1.02-1.50,Z =2.12,P =0.034).Conclusion XPC Lys939G1n (A/C) gene polymorphism may be associated with the susceptibility of gastric cancer,and genotype CC,CC + AC and allele C can increase the risk of gastric cancer.