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  • A Meta-analysis of Parkin Gene S/N167 Polymorphism in the Risks of Parkinson’s Disease

    Objective To investigate the association between parkin gene S/N167 polymorphism and the risk for Parkinson’s Disease (PD) using the methods of meta-analysis. Method References were retrieved through the computerized Medline, Cochrane Library and CBM search from 1998 to 2003. Similar search strategies were applied to each of these databases. The unpublished data of our study were also included.Studies eligible for this meta-analysis should meet the following inclusion criterias: ① presentation of original data and a cross-sectional design. ② PD as the outcome of interest. ③ an odds ratio (or enough information to calculate it) reported to quantify the association between the frequencies of genotypes and alleles of parkin gene S/N167 polymorphism and the risk for PD. All analyses were conducted with ’Review Manager’ Version 4.2 software. Results A total of 1 239 PD patients and 1 168 control studies were studied. The combined data statistics revealed the frequencies of the genotypes and alleles were higher, but showed no statistically difference, for the total PD group from that ofthe control group (Z=1.57, P=0.12). After stratification according to eastern or western origin, the frequencies of G/A+A/A genotype and a allele of eastern origin were significantly higher [test for overall effect: P=0.01, OR=1.41, 95%CI= (1.08 to1.83); P=0.01, OR=1.25, 95%CI= (1.08 to1.44), respectively] in the PD group than that in the control group. After including our unpublished data, the results remained constant, and the trend was much more pronounced. Conversely, there was no difference [test for overall effect: P=0.08, OR=0.55, 95%CI= (0.30 to1.02); P=0.08, OR=0.55, 95%CI= (0.28 to1.08)] in the frequencies of allele and genotype of western origin between the PD patients and the controls. Conclusions The meta-analysis suggests that the parkin gene S/N167 polymorphism might be a genetic risk factor for PD of eastern origin, but not a definite risk for PD of western origin.

    Release date:2016-09-07 02:27 Export PDF Favorites Scan
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