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Abstract
Background
The aim of the present study was to investigate the association between tumor necrosis factor-alpha (TNF-α) gene G-238A polymorphism and risk of coronary artery disease (CAD) using a meta-analytical approach.
Methods
The PubMed and Embase databases were searched for relevant publications up to January 13, 2015. Four authors (XPH, XDZ, XTZ, and ZJZ) independently selected the studies, extracted, and analyzed the data using the Comprehensive Meta-Analysis software. The sensitivity and subgroups analyses were also performed. Either a fixed effects or a random effects model was used to estimate pooled odds ratios (ORs) and their 95% confidence intervals (CIs).
Results
Finally, ten articles including eleven case-control studies involving 4,222 patients and 4,832 controls were yielded. The results indicated no significant association between G-238A polymorphism and CAD risk (A vs G: OR =1.08, 95% CI =0.89–1.30; AA vs GG: OR =1.15, 95% CI =0.59–2.25; GA vs GG: OR =1.14, 95% CI =0.88–1.48; AA vs [GG + GA]: OR =1.09, 95% CI =0.56–2.14; (GA + AA) vs GG: OR =1.11, 95% CI =0.90–1.38). In the subgroup analyses, similar results were obtained with overall populations. The sensitivity analyses showed that the overall results were robust. No publication bias was detected.
Conclusion
Based on current evidence, we can conclude that TNF-α G-238A polymorphism might not be associated with CAD risk.
Supplementary material
Table S1 The search strategy of PubMed
Acknowledgments
This study was supported by the National Natural Science Foundation of the People’s Republic of China (No 81273971). The funders had no roles in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Disclosure
The authors report no conflicts of interest in this work.