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- W4254093669 abstract "Huntington's disease is a progressive neurodegenerative disease caused by an abnormally expanded (>36) CAG repeat within the ITI5 gene encoding a widely expressed 349-kd protein, huntingtin. The medium spiny neurons of the caudate preferentially degenerate in Huntington's disease, with the presence of neuronal intranuclear inclusions. Excitotoxicity is thought to be important in the pathogenesis of Huntington's disease; the recently described mitochondrial respiratory chain and aconitase defects in Huntington's disease brain are consistent with this hypothesis. A transgenic mouse model (R6/2) of Huntington's disease develops a movement disorder, muscle wasting, and premature death at about 14 to 16 weeks. Selective neuronal death in these mice is not seen until 14 weeks. Biochemical analysis of R6/2 mouse brain at 12 weeks demonstrated a significant reduction in aconitase and mitochondrial complex IV activities in the striatum and a decrease in complex IV activity in the cerebral cortex. Increased immunostaining for inducible nitric oxide synthase and nitrotyrosine was seen in the transgenic mouse model but not control mouse brains. These results extend the parallels between Huntington's disease and the transgenic mouse model to biochemical events and suggest complex IV deficiency and elevated nitric oxide and superoxide radical generation precede neuronal death in the R6/2 mouse and contribute to pathogenesis." @default.
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- W4254093669 date "2000-01-01" @default.
- W4254093669 modified "2023-10-18" @default.
- W4254093669 title "Mitochondrial dysfunction and free radical damage in the Huntington R6/2 transgenic mouse" @default.
- W4254093669 doi "https://doi.org/10.1002/1531-8249(200001)47:1<80::aid-ana13>3.3.co;2-b" @default.
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