Association between KCNJ11 gene polymorphisms and risk of type 2 diabetes mellitus in East Asian populations: a meta-analysis in 42,573 individuals |
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Authors: | Lijuan Yang Xianghai Zhou Yingying Luo Xiuqin Sun Yong Tang Wulan Guo Xueyao Han Linong Ji |
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Institution: | (1) Department of Endocrinology and Metabolism, Peking University People’s Hospital, No. 11 Xi Zhimen Nan Da Jie Main Street, Xi Cheng District, Beijing, 100044, China; |
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Abstract: | A number of studies have been performed to identify the association between potassium inwardly-rectifying channel, subfamily
J, member 11 (KCNJ11) gene and type 2 diabetes mellitus (T2DM) in East Asian populations, with inconsistent results. The main
aim of this work was to evaluate more precisely the genetic influence of KCNJ11 on T2DM in East Asian populations by means
of a meta-analysis. We identified 20 articles for qualitative analysis and 16 were eligible for quantitative analysis (meta-analysis)
by database searching up to May 2010. The association was assessed under different genetic models, and the pooled odds ratios
(ORs) with 95% confidence intervals (95% CIs) were calculated. The allelic and genotypic contrast demonstrated that the association
between KCNJ11 and T2DM was significant for rs5210. However, not all results for rs5215 and rs5218 showed significant associations.
For rs5219, the combined ORs (95% CIs) for allelic contrast, dominant and recessive models contrast (with allelic frequency
and genotypic distribution data) were 1.139 (1.093–1.188), 1.177 (1.099–1.259) and 1.207 (1.094–1.332), respectively (random
effect model). The analysis on the most completely adjusted ORs (95% CIs) by the covariates of rs5219 all presented significant
associations under different genetic models. Population-stratified analysis (Korean, Japanese and Chinese) and sensitivity
analysis verified the significant results. Cumulative meta-analysis including publication time and sample size illustrated
the exaggerated genetic effect in the earliest studies. Heterogeneity and publication bias were assessed. Our study verified
that single nucleotide polymorphisms (SNPs) of KCNJ11 gene were significantly associated with the risk of T2DM in East Asian
populations. |
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