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  • Title: SNCA rs3822086 C>T Polymorphism Increases the Susceptibility to Parkinson's Disease in a Chinese Han Population.
    Author: Jian CD, Huang JM, Meng LQ, Li XB, Huang RY, Shi SL, Wu Y, Qin C, Chen J, Zhang YM, Wang S, Feng YL, Zhou SN.
    Journal: Genet Test Mol Biomarkers; 2015 Sep; 19(9):481-7. PubMed ID: 26203864.
    Abstract:
    OBJECTIVE: Protofibrils of alpha-synuclein mediate neuronal cell death and propagate Parkinson's disease (PD). In this study, we investigated the relationship between the rs3822086 C>T polymorphism located in the fourth intron of the alpha-synuclein (SNCA) gene and susceptibility to PD in a Chinese Han population. METHODS: 146 PD patients and 144 sex- and age-matched healthy individuals (control group) were selected for this study. The SNCA rs3822086 polymorphism was examined in all 300 study subjects by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis. RESULTS: The genotype and allele frequencies of the SNCA rs3822086 polymorphism showed significant differences between the PD group and control group (TT: 25.3% vs. 18.8%, p=0.035; CT+TT: 77.4% vs. 66.0%, p=0.031; T allele: 51.4% vs. 42.4%, p=0.030; respectively). Stratified analyses based on gender indicated that male PD patients exhibited higher genotype and allele frequencies of the SNCA rs3822086 polymorphism compared to healthy male controls (TT: 26.7% vs. 13.2%, p=0.011; CC+CT: 73.3% vs. 86.8%, p=0.024; T allele: 51.2% vs. 37.9%, p=0.012; respectively). Age-stratified analyses indicated that the genotype and allele frequencies of the SNCA rs3822086 polymorphism were significantly higher in PD patients older than 60 years in comparison to healthy controls (TT: 32.2% vs. 20.5%, p=0.014; CT+TT: 77.0% vs. 60.2%, p=0.017; T allele: 54.6% vs. 40.3%, p=0.008; respectively). CONCLUSION: Our findings demonstrate that the SNCA rs3822086 C>T polymorphism correlates with increased susceptibility to PD among the Chinese Han population.
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