HLA-DRA rs3129882 A/G polymorphism was not a risk factor for Parkinson's disease in Chinese-based populations: a meta-analysis.

Purpose: Many studies have evaluated the association between the HLA-DRA rs3129882 A/G polymorphism and risk for Parkinson's disease (PD) in Chinese-based populations, however, published data remain inconclusive. Therefore, we performed a meta-analysis from all relevant studies to evaluate an association of HLA-DRA rs3129882 A/G polymorphism with susceptibility to PD. Methods: The summary odds ratio (OR) with its 95% confidence interval (Cl) was calculated to evaluate the association. The Q statistic was used to evaluate homogeneity and funnel plots were used to assess publication bias. The minor A allele frequencies, additive, dominant as well as recessive genetic models were examined in the analyses. Results: Five case-control studies with a total of 2230 PD cases and 2262 controls from Mainland China, Taiwan, Singapore, and Malaysia were included in the final meta-analysis. Neither the minor A allele frequencies nor the genotypic distributions were significantly different between PD cases and controls when all studies were pooled into this meta-analysis. Conclusion: The results of this meta-analysis suggest that HLA-DRA rs3129882 A/G polymorphism was not responsible for PD in Chinese-based populations. [ABSTRACT FROM AUTHOR]