Abstract
Introduction: Several studies regarding the association of the ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) K121Q gene polymorphism with the risk of type 2 diabetes mellitus (T2DM) showed inconsistent results. This study aimed to investigate the association of ENPP1 K121Q gene polymorphism with T2DM risk using meta-analysis. The study was limited to the American, European, and African populations.Methods: PubMed and Embase databases were searched for eligible publications. The following information was extracted from each study: name of first author, publication year, country of origin, sample size of cases and controls, and size of each allele. The combined odds ratios (ORs) and 95% confidence intervals (95% CIs) for the association between ENPP1 K121Q gene polymorphism and T2DM risk were assessed using random or fixed effect model. A comprehensive meta-analysis (CMA) 2.0 was used to analyze the data.Results: Nineteen studies (17717 cases/28022 controls) on the association between ENPP1 K121Q gene polymorphism and T2DM risk were included in this meta-analysis. The results indicated that the ENPP1 K121Q gene polymorphism was associated with increased T2DM risk (Q vs. K genetic model, OR 95% CI = 1.11 [1.02–1.22], p = 0.014; QQ vs. KK + KQ, OR 95% CI = 1.14 [1.01–1.23], p = 0.039) and decreased T2DM risk (K vs. Q, OR 95% CI = 0.90 [0.82–1.00], p = 0.014; KK vs. KQ + QQ, OR 95% CI = 0.89 [0.80–0.98], p = 0.024).Conclusions: The results indicate that the ENPP1 K121Q gene polymorphism is associated with the risk of T2DM in the American, European, and African populations.
Highlights
Several studies regarding the association of the ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) K121Q gene polymorphism with the risk of type 2 diabetes mellitus (T2DM) showed inconsistent results
This study aimed to investigate the association between the ENPP1 K121Q gene polymorphism and the risk of T2DM using meta-analysis
Several studies regarding the association between the ENPP1 K121Q gene polymorphism and the risk of T2DM were collected for calculating combined odds ratio (OR) 95% confidence interval (CI) and http://www.jhsci.ba
Summary
Several studies regarding the association of the ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) K121Q gene polymorphism with the risk of type 2 diabetes mellitus (T2DM) showed inconsistent results. Type 2 diabetes mellitus (T2DM) is the most common form of diabetes worldwide [1], and includes a complex group of chronic metabolic disorders characterized by hyperglycemia. This is the result of two distinct pathophysiological states: a) defects in insulin secretion caused by impaired pancreatic β-cell function and b) disruption of insulin action caused by insulin resistance in muscle, fat, and the liver [2,3,4]. Ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) gene variants have been identified to have a significant functional role in determining susceptibility to T2DM [8]
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