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  • Title: Meta-analysis of association between cytokine gene polymorphisms and lung cancer risk.
    Author: Peng WJ, He Q, Yang JX, Wang BX, Lu MM, Wang S, Wang J.
    Journal: Mol Biol Rep; 2012 May; 39(5):5187-94. PubMed ID: 22160576.
    Abstract:
    The aim of this study was to evaluate the association between various cytokine gene polymorphisms and lung cancer (LC) susceptibility. We searched Pubmed, Elsevier Science Direct, China National Knowledge Infrastructure database, Chinese Biomedical database, Google scholar. Totally, 20 studies involving 6,467 cases and 8,320 controls were included in the meta-analysis. The effects of eight polymorphisms, i.e. TNF-α 308G/A, IL-6 174G/C, IL-1β 31T/C, IL-1β 511C/T, COX-2 8473T/C, IL-10 1082G/A, IL-10 819C/T, and IL-10 592C/A were evaluated. The combined odds ratio (OR) with 95% confidence interval (95% CI) was calculated to estimate the strength of the association in a fixed or random effect model. Heterogeneity and publication bias were also assessed. We found a significant association between IL-10 polymorphism and LC. For IL-10 1082G/A, the overall ORs (95% CI) of the G versus A, GG versus AA, and GG/GA versus AA were 2.35 (1.16-4.76), 2.07 (1.16-3.70) and 3.17 (1.31-7.68), respectively. For IL-10 819C/T, the pooled ORs (95% CI) of the C versus T and CC versus TT were 1.27 (1.01-1.58) and 2.27 (1.32-3.89). For IL-10 592C/A, the comparison of subjects in the CC or CC/CA genotype versus AA homozygotes showed significant results (OR = 2.00, 95% CI: 1.24-3.23; OR = 1.80, 95% CI: 1.28-2.54). But, other gene polymorphisms did not reach statistical associations. IL-10 1082G/A, 819C/T and 592C/A polymorphisms might be risk factors for LC. TNF-α 308G/A, IL-6 174G/C, IL-1β 31T/C, IL-1β 511C/T, COX-2 8473T/C polymorphisms were not detected to be related to the risk for LC. Due to the limitation of the number of the studies, we should take the conclusion with caution. While, further studies are necessary for more precise association.
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