科研之友
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摘要
Introduction: It has been suggested that allergies are inversely associated with glioma risk. Single nucleotide polymorphisms in two allergy-related genes [interleukin (IL)-4R alpha, IL-13] have been implicated in susceptibility to glioma; however, results from the published studies remained inconclusive. Methods: To derive a more precise relationship, we conducted a meta-analysis including seven case-control studies that investigated the influence of IL-4R alpha rs1801275 and IL13 rs20541 polymorphisms on glioma risk. Data were extracted from these studies and pooled odds ratios (OR) with 95% confidence intervals (CI) were used to investigate the strength of the association. Results: Overall, the pooled analysis showed that there was no significant association between the IL-4R alpha rs1801275 polymorphism and glioma risk (OR = 0.99, 95% CI: 0.79-1.25, AG/GG vs. AA). However, we found that the IL13 rs20541 variant genotypes (GA/AA) were significantly associated with reduced risk for glioma (OR = 0.85, 95% CI: 0.75-0.97, GA/AA vs. GG). In the stratified analyses by ethnicity, marginally significant association between the IL13 rs20541 polymorphism and decreased glioma risk was found among Asian populations in dominant models (OR = 0.84, 95% CI: 0.70-1.00, GA/AA vs. GG). Conclusions: This meta-analysis suggests that the IL13 rs20541 but not the IL-4R alpha rs1801275 polymorphism may be a genetic predictor for glioma. More studies with larger sample size are warranted to further elucidate the impact of the IL13 rs20541 polymorphism on glioma risk.
