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GWAS-linked GAK locus in Parkinson's disease in Han Chinese and meta-analysis

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Abstract

Genome-wide association studies of Parkinson's disease (PD) have recently identified a new susceptibility locus GAK (PARK17) (rs1564282 variant) in subjects of European ancestry. Its role in other races is still unclear. The potential differences of the clinical characteristics between carriers and non-carriers have not been examined in detail. Using a case-control methodology, we analyzed the GAK rs1564282 variant in an ethnic Han Chinese population and conducted a meta-analysis combining our result and available published data. A total of 1,574 ethnic Han Chinese study subjects comprising 812 sporadic PD patients and 762 control individuals were included. The minor allele frequency was significantly different at SNP rs1564282 between the cases and the controls (OR = 1.59, 95% CI = 1.09, 1.69, P = 0.007) in the overall PD population. Subjects with CT + TT genotypes have an increased risk (OR = 1.34, 95% CI = 1.05, 1.72, P = 0.017) compared to those with CC genotype. A meta-analysis revealed that the frequency of carrier's genotypes was significantly higher in PD than in control subjects (OR = 1.31, 95% CI = 1.19, 1.44, P < 0.00001). The gender, age of onset, Hoehn-Yahr stage and UPDRS scores and clinical features were similar between carriers and non-carriers. In conclusion, we demonstrated that the rs1564282 variant in GAK (PARK17) increases the risk of PD in Han Chinese patients from mainland China and the meta-analysis with European populations revealed a similar finding. However, carriers cannot be distinguished from non-carriers based on their clinical features or motor severity. Functional studies of GAK to unravel its role in the pathophysiologic pathway of PD will be useful. © 2011 Springer-Verlag.

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Li, N. N., Chang, X. L., Mao, X. Y., Zhang, J. H., Zhao, D. M., Tan, E. K., & Peng, R. (2012). GWAS-linked GAK locus in Parkinson’s disease in Han Chinese and meta-analysis. Human Genetics, 131(7), 1089–1093. https://doi.org/10.1007/s00439-011-1133-3

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