ABSTRACT
Objective To investigate the association of neural differentiation factor 1 (NeuroD1) Ala45Thr polymorphism with type 2 diabetes by meta-analysis.Methods The electronic databases were retrieved from PubMed,EMBASE,CNKI,VIP fulltext database,and Wanfang fulltext database.Literatures about the association of NeuroD1 Ala45Thr polymorphism with type 2 diabetes from 2004 to 2012 were searched.The selected studies from 2004 to 2012 were included to analyze data based on the published meta-analysis of the NeuroD1 (Ala45Thr) gene polymorphism and type 2 diabetes written by Kavvoura,et al.The odds ratio of NeuroD1 (Ala45Thr) genotype distributions in type 2 diabetic patients compared with healthy control were analyzed.Rev-Man 5.0 software was applied for investigating hereogeneity among individual studies and summarizing effects with proper statistical methods.Thirteen case control studies were enrolled.Results A total of 3 896 patients and 3 186 control subjects were enrolled for the study.The pooled ORs of Thr45Thr45/(Ala45Thr+ Ala45Ala45) genotype in type 2 diabetes mellitus and control groups were 3.16 (95％ CI0.99-10.11) in the subgroup of yellow race and 1.09(95％ CI0.90-1.32) in the subgroup of white race,with no statistically significant difference(P＞0.05).The pooled OR of G/A allele in type 2 diabetes mellitus and control groups was 0.85 (95 ％ CI 0.72-0.99)/1.18 (95％ CI 1.07-1.38),with statistically significant difference (Z =2.02,P =0.04).Conclusions The A allele of NeuroD1 (Ala45Thr) locus may be a risk factor for type 2 diabetes mellitus.