Associations of Polymorphisms with the Risk of Type 2 Diabetes Mellitus: An Updated Meta-Analysis with Trial Sequential Analysis

Overview

Journal J Diabetes Res

Publisher Wiley

Specialty Endocrinology

Date 2020 Jul 23

PMID 32695830

Citations 9

Authors

Xiao-Xuan Yu

Min-Qi Liao

Yu-Fei Zeng

Xu-Ping Gao

Yan-Hua Liu

Wei Sun

Sui Zhu

Fang-Fang Zeng

Yan-Bin Ye

Affiliations

Soon will be listed here.

Abstract

Background: Previous studies have examined the role of the KQT-like subfamily Q member1 () gene polymorphisms on the risk of type 2 diabetes mellitus (T2DM), but the findings are inconclusive.

Objective: To examine the association between the gene polymorphisms and the risk of T2DM using an updated meta-analysis with an almost tripled number of studies.

Methods: Five electronic databases, such as PubMed and Embase, were searched thoroughly for relevant studies on the associations between seven most studied gene polymorphisms, including rs2237892, rs2237897, rs2237895, rs2283228, rs231362, rs151290, and rs2074196, and T2DM risk up to September 14, 2019. The summary odds ratios (ORs) with their 95% confidence intervals (CIs) were applied to assess the strength of associations in the random-effects models. We used the trial sequential analysis (TSA) to measure the robustness of the evidence.

Results: 49 publications including 55 case-control studies (68,378 cases and 66,673 controls) were finally enrolled. In overall analyses, generally, increased T2DM risk was detected for rs2237892, rs2237895, rs2283228, rs151290, and rs2074196, but not for rs231362 under all genetic models. The ORs and 95% CIs for allelic comparison were 1.23 (1.14-1.33) for rs2237892, 1.21 (1.16-1.27) for rs2237895, 1.27 (1.11-1.46) for rs2237897, 1.25 (1.09-1.42) for rs2283228, 1.14 (1.03-1.27) for rs151290, 1.31 (1.23-1.39) for rs2074196, and 1.16 (0.83, 1.61) for rs231362. Stratified analyses showed that associations for rs2237892, rs2237895, rs2283228, and rs151290 were more evident among Asians than Caucasians. TSA demonstrated that the evidence was sufficient for all polymorphisms in this study. The genotypes of the three SNPs (rs2237892, rs2283228, and rs231362) were significantly correlated with altered KCNQ1 gene expression.

Conclusion: This meta-analysis suggested that gene polymorphisms (rs2237892, rs2283228, rs2237895, rs151290, and rs2074196) might be the susceptible factors for T2DM, especially among Asian population.

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