Abstract
As a crucial oncogene, B cell lymphoma-2 (BCL-2) could promote cancer cell survival by inhibiting apoptosis via suppressing activation of proapoptotic proteins, such as BAX and BAK. There is a functional rs2279115 genetic polymorphism locating in BCL-2 promoter and deregulating BCL-2 expression. However, it is still largely undefined how BCL-2 rs2279115 promoter noncoding genetic variant is involved in glioma development. We examined the association between BCL-2 rs2279115 and glioma risk using a case-control approach. Odds ratios (ORs) and 95% confidence intervals (CIs) were estimated by logistic regression adjusted by age and sex. Our results demonstrated that BCL-2 rs2279115 was significantly associated with glioma risk. The odd of individuals harboring A allele (CA + AA genotype) was 0.50 (95% CI = 0.39-0.64, p = 1.0 × 10-7) compared with CC genotype carriers. Stratification analyses by sex elucidated that BCL-2 rs2279115 was significantly associated with glioma risk in males (OR = 0.41, 95% CI = 0.30-0.58, p = 1.0 × 10-7), but not in females (p > 0.05). In summary, our results indicate that the functional BCL-2 rs2279115 genetic variant contributes to glioma predisposition and suggest prevalent involvement of regulatory genetic variations in glioma development.
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