CDKAL1基因rs7756992位点A>G多态性与2型糖尿病易感性的meta分析

目的 系统评价CDKAL1基因rs7756992位点A＞G多态性与2型糖尿病(T2DM)易感性的关系.方法 制定原始文献的纳入、排除标准及检索策略,通过检索学术期刊全文数据库(CNKI)、万方数据库及EMBASE、PubMed、ScienceDirect等数据库,收集有关CDKAL1基因rs7756992位点A＞G多态性与T2DM易感性的病例对照研究,以病例组与对照组CDKAL1基因rs7756992位点各种基因模型的比值比(OR)及其95％置信区间(CI)为效应指标进行meta分析,并根据研究人群种族不同进行亚组分析.结果 本研究共纳入15篇文献,T2DM组和对照组病例数分别为24 315例和35 132例.Meta分析显示,CDKAL1基因rs7756992位点A＞G多态性与T2DM易感性有关联等位基因模式(G vs A):OR=1.171,95％CI 1.122～1.223,P＜0.001;共显性模式(GG vs AA):OR=1.380,95％CI1.258～1.515,P＜0.001;共显性模式(AG vs AA):OR=1.131,95％CI 1.089～1.176,P＜0.001;显性模式(AG+GGvs AA):OR=1.168,95％CI 1.101～1.240,P＜0.001;隐性模式(CG vs AA+AG):OR=1.343,95％CI 1.282～1.405,P＜0.001].亚组分析显示,亚洲人群和白种人群中携带CDKAL1基因rs7756992位点G等位基因的人群发生T2DM的风险增加(P＜0.05);而非洲人群中携带CDKAL1基因rs7756992位点G等位基因与A等位基因的人群发生T2DM风险的差异无统计学意义.结论 在亚洲人群及白种人群中CDKAL1基因rs7756992位点A＞G等位基因的突变可能是T2DM发病的危险因素之一.

Relationship between CDKAL1 gene rs7756992 A>G polymorphism and susceptibility to type 2 diabetes mellitus: a meta-analysis

Objective To review the relationship between CDKAL1 gene rs7756992 A>G polymorphism and the susceptibility to type 2 diabetes mellitus (T2DM). Methods Electronic databases including China National Knowledge Infrastructure (CNKI), Wanfang database, EMBASE, PubMed and ScienceDirect were searched. Case-control studies on the relationship between CDKAL1 gene rs7756992 A>G polymorphism and the susceptibility to T2DM were selected based on the inclusion and exclusion criteria of original document. The pooled odds ratio (OR) with 95% confidence interval (CI) of the relationship between CDKAL1 gene rs7756992 polymorphism and the susceptibility to T2DM were calculated using different genetic models. Subgroup analysis based on the population of different ethnicities and sensitivity analysis were performed. Results Fourteen studies including 24 315 participants in T2DM group and 35 132 in control group were identified in this analysis. Meta analysis showed that CDKAL1 gene rs7756992 A>G polymorphism was associated with the susceptibility to T2DM under different genetic models (allele G vs A]: OR=1.171, 95%CI: 1.122-1.223, P<0.001; co-dominant GG vs AA]: OR=1.380, 95%CI: 1.258-1.515, P<0.001; co-dominant AG vs AA]: OR=1.131, 95%CI: 1.089-1.176, P<0.001; dominant AG+GG vs AA]: OR=1.168, 95%CI: 1.101-1.240, P<0.001; recessive GG vs AA+AG]: OR=1.343, 95%CI: 1.282-1.405, P<0.001). Results of subgroup analysis showed that CDKAL1 gene rs7756992 G allele significantly increased the risk of T2DM in both Asian and Caucasian populations (P<0.05), but there was no significant difference in African population. Conclusion The mutations of A>G allele of rs7756992 locus in CDKAL1 gene may be a risk factor for T2DM in Asian and Caucasian population.