Associations between tumor necrosis factor alpha gene polymorphism and sarcoidosis: a meta-analysis
2014
Xie, Hao Jun | Wu, Muli | Niu, Yi | Shen, Bin | Huo, Yating | Cheng, Yuanxiong
Published studies regarding the association between tumor necrosis factor alpha (TNF-α) gene polymorphism and sarcoidosis risk are inconsistent. In order to clarify this association, we performed a meta-analysis of case–control studies with available data. PubMed, EMBASE and BIOSIS Previews were comprehensively searched to identify relevant studies. Twelve case–control studies in 11 articles involving 3,218 participants were included in the meta-analysis to assess the association between TNF-α gene polymorphism and susceptibility to sarcoidosis. We estimated the pooled odds ratio (OR) with its 95 % confidence intervals (95 % CI) to explore the potential association. Our meta-analysis results suggested that TNF-α-308G/A AA/AG genotype increased sarcoidosis risk, in Asian and Caucasian ethnicity, and in sarcoidosis with Löfgren syndrome. No association was found between TNF-α-238G/A, TNF-α-857C/T polymorphism and sarcoidosis risk. In conclusion, our meta-analysis indicated that AG/GG genotype of TNF-α-308G/A are associated with increased sarcoidosis risk.
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