Meta-analysis of myeloperoxidase gene polymorphism and coronary artery disease susceptibility

Abstract

Objective: To assess the association between myeloperoxidase (MPO) gene polymorphism and coronary artery disease (CAD). Methods: Several databases were used to retrieve relevant literature up to March 2013 by keywords. A Meta-analysis was performed by Statal2.0 software to estimate the pooled odds ratio (OR) and the 95% confidence interval (CI). Heterogeneity among studies was tested and sensitivity analysis was applied. Publication bias was examined using Begg's funnel plot and Egger's linear regression test. Results: A total of 17 studies were included in this Meta-analysis. For MPO -463 G/A polymorphism, the pooled OR of A allele vs G allele was 0.58 [95% CI (0.47-0.72)] and the pooled OR of genotypes AA+AG vs GG was 0.58 [95% CI (0.46-0.72)]. In subgroup analysis of study population, AA and AG genotypes were significantly associated with CAD in Asians but not in Europeans. The MPO -463 G/A polymorphism in the stable angina pectoris subgroup was evaluated in 3 studies and the pooled OR of A allele vs G allele and genotypes AA+AG vs GG for proven CAD was 0.45 [95% CI (0.15-1.37)] and 0.57 [95% CI (0.19-1.65)]. For MPO -129 A/G gene polymorphism, the pooled OR of genotype GG vs AA+AG was 0.91 [95% Cl (0.74-1.10)]. Conclusion: A allele of MPO -463 G/A gene is associated with decreased risk of CAD except in the Europeans. There is no association between MPO -129 A/G gene polymorphisms and CAD risk.