Background And Objectives: Tumor necrosis factor-α (TNF-α) plays a very important role in the development and progress of cancer. Some TNF-α polymorphisms have been confirmed to increase cancer risks; however, the association between TNF-α-238 polymorphism and cancers remains controversial and ambiguous. The aim of this study is to explore a more precise estimation of its relationship with cancer using meta-analysis.
Methods: Electronic searches of several databases were conducted for all publications on the association between this variant and cancer through March 2011. Odds ratios (OR) with 95% confidence intervals (95% CI) were used to access the strength of this association in the random-effect model.
Results: Thirty four studies with 34,679 cancer patients and 41,186 healthy controls were included. This meta-analysis showed no significant association between TNF-α-238 polymorphism and cancers (AA+GA vs GG: OR = 1.09, 95%CI = 0.88-1.34). In Caucasian and Asian subgroups, OR values (95% CI) were 1.14 (0.91-1.43) and 0.97 (0.58-1.61), respectively. In the subgroups of cancer type, no significant association was detected. The sensitivity analysis further strengthened the validity of these negative associations. No publication bias was observed in this study.
Conclusions: No significant association was found between the TNF-α-238 polymorphism and the risk for cancer.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3139602 | PMC |
| http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0022092 | PLOS |
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