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- W320157763 abstract "Epidemiological studies suggest that several different environmental agents interact with a number of genetic elements to cause Parkinson`s disease (PD), a common neurodegenerative disease. Abnormalities of oxidative metabolism may be central to this process. Specifically, the production and degradation of dopamine may lead to toxic by-products and increased oxidative stress. Toxic by-products include hydrogen peroxide, superoxide, and hydroxyl radicals, all of which are implicated in the aging process of the central nervous system. Superoxide dismutase (SOD) catalyzes superoxide to hydrogen peroxide. Genetic predisposition to PD may be at least partially a result of certain SOD alleles. Using the cDNA sequence of Mn-SOD gene, oligonucleotide primers were designed which span several presumptive splice junction sites. An approximatley 2.4kb PCR product was amplified from gDNA samples that span one or more intron near the 3{prime} end of the Mn-SOD cDNA sequence. The resultant product was screened with a panel of 4-cutters to identify fragments appropriate for SSCP analysis. Twenty-two gDNA samples were screened for SSCP and size differences of these PCR products. After digestion with AluI, two polymorphisms were observed. Two alleles with a size difference of 2-4 bp were observed by denaturing PAGE in one of the fragments. SSCP analysis revealedmore » a polymorphism with 2 alleles in another fragment. Sequence analysis of these polymorphisms is in progress. DNA from several DEPH families was used to confirm Mendelian inheritance of these polymorphisms. Genomic DNA samples have been collected from 265 PD patients and 169 control individuals; allelic frequencies will be determined for these populations, compared by {chi}{sup 2} analysis, and relative risk calculated. These results may support a contribution of Mn-SOD in the genetic predisposition to PD.« less" @default.
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- W320157763 date "1994-09-01" @default.
- W320157763 modified "2023-09-23" @default.
- W320157763 title "Identification of two new polymorphisms in the manganese superoxide dismutase gene (Mn-SOD); Part of the etiology of Parkinson`s disease?" @default.
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