Department of Oncology, The First Affiliated Hospital of Anhui Medical University, 218 Jixi Road, Hefei 230022, Anhui, China.
Mol Biol Rep. 2013 Jan;40(1):109-16. doi: 10.1007/s11033-012-2039-4. Epub 2012 Nov 17.
Published data on the association between miR-196a2 rs11614913 polymorphism and risk of gastrointestinal (GI) cancers are inconsistent among studies. To clarify the association, we performed a comprehensive literature search and a meta-analysis. We searched multiple databases to identify genetic association studies investigating the effect of miR-196a2 rs11614913 polymorphism on GI cancers with the last report up to January 18, 2012. The odds ratio (OR) and its 95 % confidence interval (95 % CI) were calculated to assess the strength of association. A total of 13 studies including 4,947 cases and 5,642 controls based on the search criteria were involved in this meta-analysis. In the overall analysis, it was suggested that variant C allele of miR-196a2 rs11614913 polymorphism could significantly increase risk of GI cancers in different genetic models (C vs T: OR = 1.17, 95 % CI = 1.07-1.28, P = 0.0008; CT + CC vs TT: OR = 1.26, 95 % CI = 1.08-1.48, P = 0.004; CC vs CT + TT: OR = 1.23, 95 % CI = 1.08-1.39, P = 0.002; CC vs TT: OR = 1.55, 95 % CI = 1.24-1.94, P = 0.0001; CT vs TT: OR = 1.20, 95 % CI = 1.02-1.40, P = 0.03). When stratified by ethnicity, we found a significant association in Asian population, as well as Caucasian population. When stratified by cancer types, we found a significant association in colorectal cancer, as well as esophageal cancer. We did not find a significant association between miR-196a2 rs11614913 polymorphism and hepatocellular carcinoma risk. For gastric cancer, a significantly increased cancer risk was observed only in homozygote comparison. This meta-analysis demonstrates that miR-196a2 rs11614913 polymorphism is significantly associated with risk of GI cancers.
已发表的关于 miR-196a2 rs11614913 多态性与胃肠道(GI)癌症风险之间关联的资料在不同的研究中并不一致。为了阐明这种关联,我们进行了全面的文献检索和荟萃分析。我们检索了多个数据库,以确定研究 miR-196a2 rs11614913 多态性对 GI 癌症影响的遗传关联研究,最后一次报告截至 2012 年 1 月 18 日。计算比值比(OR)及其 95%置信区间(95%CI)来评估关联的强度。根据检索标准,共有 13 项研究共 4947 例病例和 5642 例对照纳入本荟萃分析。在总体分析中,提示 miR-196a2 rs11614913 多态性的 C 等位变异可能显著增加不同遗传模型下 GI 癌症的风险(C 对 T:OR=1.17,95%CI=1.07-1.28,P=0.0008;CT+CC 对 TT:OR=1.26,95%CI=1.08-1.48,P=0.004;CC 对 CT+TT:OR=1.23,95%CI=1.08-1.39,P=0.002;CC 对 TT:OR=1.55,95%CI=1.24-1.94,P=0.0001;CT 对 TT:OR=1.20,95%CI=1.02-1.40,P=0.03)。按种族分层时,我们在亚洲人群以及高加索人群中发现了显著的相关性。按癌症类型分层时,我们在结直肠癌和食管癌中发现了显著的相关性。我们未发现 miR-196a2 rs11614913 多态性与肝细胞癌风险之间存在显著关联。对于胃癌,仅在纯合子比较中观察到癌症风险显著增加。本荟萃分析表明,miR-196a2 rs11614913 多态性与 GI 癌症风险显著相关。