文摘
The receptor for advanced glycation end products (RAGE), a member of immunoglobulin superfamily, has been proved to stimulate survival, growth, and metastatic spread of cancers cells. Evidence suggested that the 82G/S, ?74T/A, and ?29T/C polymorphisms in RAGE promoter region might affect the risk of cancer; however, data from epidemiological studies showed conflicting results that remain to be further clarified. This meta-analysis was performed to derive a more precise estimation of 82G/S, ?74T/A, and ?29T/C polymorphisms and risk of cancer. A comprehensive electronic search was conducted for articles published up until December 2, 2014, in Medline (PubMed), Embase, the Cochrane Library and Google Scholar. A total of 12 case–control articles were included in this meta-analysis, providing 3,374 cases and 3,757 controls for 82G/S, 2,936 cases and 3,338 controls for ?74T/A, and 2,882 cases and 3,279 controls for ?29T/C specifically. The pooled odds ratio (OR) with 95?% confidence interval (CI) was calculated to evaluate the associations with risk of cancer. Overall, we observed significantly increased risk of cancer in relation to 82G/S (A vs. G: OR 1.321, 95?% CI 1.164-.499, P het 0.028; AA vs. GG: OR 1.823, 95?% CI 1.541-.157, P het?P het 0.002; GA+AA vs. GG: OR 1.470, 95?% CI 1.187-.821, P het 0.002; AA vs. GG+AG: OR 1.416, 95?% CI 1.158-.732, P het 0.107) and reduced risk of cancer in relation to ?74T/A (AA vs. TT: OR 0.818, 95?% CI 0.686-.976, P het 0.025; A vs. T: OR 0.908, 95?% CI 0.840-.981, P het 0.014). In subgroup analysis for 82G/S, a significantly elevated cancer risk was indicated in the population of Asian and patients with lung cancer, and for ?74T/A, reduced risk was indicated in population of Caucasian and patients with lung cancer and breast cancer. But no significant association was observed between ?29T/C and risk of cancer. Thus, this meta-analysis revealed that 82G/S polymorphism is associated with a significantly increased risk of cancer, while ?74T/A polymorphism is associated with a reduced risk of cancers.