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Meta-Analysis
. 2016 Dec;95(49):e5593.
doi: 10.1097/MD.0000000000005593.

Association of RAGE gene Gly82Ser polymorphism with coronary artery disease and ischemic stroke: A systematic review and meta-analysis

Wen-Qi Ma  1 , Qing-Rong Qu, Yu Zhao, Nai-Feng Liu
Affiliations
Meta-Analysis

Association of RAGE gene Gly82Ser polymorphism with coronary artery disease and ischemic stroke: A systematic review and meta-analysis

Wen-Qi Ma et al. Medicine (Baltimore). 2016 Dec.

Abstract

Background: The receptor for advanced glycosylation end products (RAGE) has been widely linked to diabetic atherosclerosis, but its effects on coronary artery disease (CAD) and ischemic stroke (IS) remain controversial. The Gly82Ser polymorphism is located in the ligand-binding V domain of RAGE, suggesting a possible influence of this variant on RAGE function. The aim of the present study is to clarify the association between the RAGE Gly82Ser polymorphism and susceptibility to CAD and IS.

Methods: Eligible studies were identified through a comprehensive literature search. Odds ratios (ORs) and 95% confidence intervals (CIs) were used to evaluate the association of Gly82Ser polymorphism with CAD and IS risk. Fixed- or random-effects model was used depending on the heterogeneity between studies. A funnel plot and Egger linear regression test were applied to assess publication bias. We also performed subgroup analyses to investigate potential sources of heterogeneity.

Results: A total of 16 eligible articles containing 18 studies were analyzed. The pooled analysis indicated that the Gly82Ser polymorphism significantly increased CAD risk in recessive and homozygous genetic models (SS vs GS + GG: OR = 1.34, 95% CI = 1.09-1.64; SS vs GG: OR = 1.38, 95% CI = 1.12-1.71). A significant association between the Gly82Ser polymorphism and IS risk was observed in all tested models except the heterozygous genetic model (GS + SS vs GG: OR = 1.20, 95% CI = 1.04-1.38; SS vs GS + GG: OR = 2.20, 95% CI = 1.74-2.78; SS vs GG: OR = 2.23, 95% CI = 1.72-2.91; S vs G: OR = 1.32, 95% CI = 1.05-1.65). Subgroup analysis suggested an association between CAD and IS risk and the Gly82Ser polymorphism in the Chinese population, but not in the non-Chinese population.

Conclusions: The current meta-analysis suggests that the RAGE Gly82Ser polymorphism is associated with an increased risk of CAD and IS, especially in the Chinese population. However, better-designed studies with larger sample sizes are needed to validate the results.

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Conflict of interest statement

The authors have no conflicts of interest to disclose.

Figures

Figure 1
Figure 1
Flow diagram of the literature selection process. CNKI = Chinese National Knowledge Infrastructure Database.
Figure 2
Figure 2
Forest plot from the meta-analysis for the association of the RAGE Gly82Ser polymorphism and CAD risk in dominant genetic model (GS + SS vs GG). Compared to the GG genotype, GS + SS genotypes showed no increased risk of CAD. CAD = coronary artery disease, CI = confidence interval, OR = odds ratio.
Figure 3
Figure 3
Forest plot from the meta-analysis on the association between the RAGE Gly82Ser polymorphism and IS risk in dominant genetic model (GS + SS vs GG). Compared to the GG genotype, GS + SS genotypes showed an increased risk of IS. CI = confidence interval, IS = ischemic stroke, OR = odds ratio.
Figure 4
Figure 4
(A and B) Sensitivity analysis of pooled OR coefficients on the correlation between the RAGE Gly82Ser polymorphism and susceptibility to CAD (A) and IS (B). Results were evaluated by excluding each study 1 at a time. CAD = coronary artery disease, CI = confidence interval, IS = ischemic stroke, OR = odds ratio.
Figure 5
Figure 5
Funnel plot for studies investigating the effect of the RAGE Gly82Ser polymorphism on the risk of CAD under the domain model. The studies of the RAGE Gly82Ser polymorphism were symmetrically distributed within the funnel plot. CAD = coronary artery disease, OR = odds ratio; SE = standard error.
See this image and copyright information in PMC

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