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Association of glucokinase regulatory protein polymorphism with type 2 diabetes and fasting plasma glucose: a meta-analysis

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Abstract

Glucokinase regulatory protein (GCKR) which binds to glucokinase (GCK) in the nucleus and inhibits its activity in the presence of fructose-6-phosphate is critical for glucose metabolism. In the past few years, a number of case–control studies have been carried out to investigate the relationship between the GCKR polymorphism and type 2 diabetes (T2D) since it was first identified to be associated with fasting plasma glucose levels, insulin resistance through genome-wide association approach. After that, a number of studies reported that the rs780094 polymorphism in GCKR has been implicated in T2D risk. However, these studies have yielded contradictory results. To investigate this inconsistency, we performed a meta-analysis of 19 studies involving a total of 298,977 subjects for GCKR rs780094 to evaluate its effect on genetic susceptibility for T2D. In a combined analysis, the summary per-allele odds ratio for T2D of the rs780094 polymorphism was 1.11 (95 % CI: 1.07–1.14, P < 10−5). Significant results were also observed using dominant (OR = 1.18, 95 % CI: 1.05–1.34, P < 10−5) or recessive genetic model (OR = 1.20, 95 % CI: 1.12–1.28, P < 10−5). Significant results were found in Asians and Caucasians when stratified by ethnicity. Besides, the polymorphism was found to be significantly associated with increased fasting plasma glucose level. There was strong evidence of heterogeneity, which largely disappeared after stratification by ethnicity. This meta-analysis suggests that the rs780094 polymorphism in GCKR is associated with elevated T2D risk, but these associations vary in different ethnic populations.

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Abbreviations

T2D:

Type 2 diabetes

CI:

Confidence interval

OR:

Odds ratio

GCKR:

Glucokinase regulatory protein

HWE:

Hardy–Weinberg equilibrium

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Acknowledgments

This study was supported by National Natural Science Foundation of China (30772800, 81072793). The project of technology tackle key problems about modernizing TCM of Shanghai science and technology commission (11DZ1972704), Long Hua Hospital Research Team, Long Hua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine (LYTD-10).

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Correspondence to Hong Li.

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Li, H., Xu, R., Peng, X. et al. Association of glucokinase regulatory protein polymorphism with type 2 diabetes and fasting plasma glucose: a meta-analysis. Mol Biol Rep 40, 3935–3942 (2013). https://doi.org/10.1007/s11033-012-2470-6

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  • DOI: https://doi.org/10.1007/s11033-012-2470-6

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