Cyclin D1 G870A polymorphism and glioma risk in a Chinese population

Background: A number of studies have suggested that the Cyclin D1 (CCND1) G870A polymorphism was associated with susceptibility to various cancers. In the present study, we aimed to investigate the association between CCND1 G870A polymorphism and the risk of glioma in a Chinese population. Materials and methods: CCND1 genotyping was determined by the PCR-RFLP method. The X-2 test was used to assess for any deviation of the genotype frequencies from Hardy-Weinberg equilibrium and to compare the genotype distributions among glioma patients and healthy control subjects. We calculated the odds ratios (ORs) and 95% confidence intervals (95% CIs) by using unconditional logistic regression. Results: The A allele frequency was higher in cases than that in controls (49.40% vs. 36.39%), and this difference was statistically significant (P = 0.001). Using the G allele as the reference allele, the subjects carrying the A allele had 3.926-fold increase in the risk of glioma (95% CI, 2.172-7.889), and p-value was significant (P = 0.007). Compared to individuals with the GG genotype, individuals with the AA genotype exhibited significantly increased glioma risk (OR = 3.661, 95% CI: 1.658-6.287, P = 0.01). Conclusion: Our results suggest that the CCND1 G870A polymorphism may contribute to the susceptibility to glioma in Chinese population.