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• W2032960995 startingPage "20843" @default.
• W2032960995 abstract "Although Parkinson disease (PD) is a progressive neurodegenerative disorder, available animal models do not exhibit irreversible neurodegeneration, and this is a major obstacle in finding out an effective drug against this disease. Here we delineate a new irreversible model to study PD pathogenesis. The model is based on simple castration of young male mice. Levels of inducible nitric-oxide synthase (iNOS), glial markers (glial fibrillary acidic protein and CD11b), and α-synuclein were higher in nigra of castrated male mice than normal male mice. On the other hand, after castration, the level of glial-derived neurotrophic factor (GDNF) markedly decreased in the nigra of male mice. Accordingly, castration also induced the loss of tyrosine hydroxylase-positive neurons in the nigra and decrease in tyrosine hydroxylase-positive fibers and neurotransmitters in the striatum. Reversal of nigrostriatal pathologies in castrated male mice by subcutaneous implantation of 5α-dihydrotestosterone pellets validates an important role of male sex hormone in castration-induced nigrostriatal pathology. Interestingly, castration was unable to cause glial activation, decrease nigral GDNF, augment the death of nigral dopaminergic neurons, induce the loss of striatal fibers, and impair neurotransmitters in iNOS(-/-) male mice. Furthermore, we demonstrate that iNOS-derived NO is responsible for decreased expression of GDNF in activated astrocytes. Together, our results suggest that castration induces nigrostriatal pathologies via iNOS-mediated decrease in GDNF. These results are important because castrated young male mice may be used as a simple, toxin-free, and nontransgenic animal model to study PD-related nigrostriatal pathologies, paving the way for easy drug screening against PD." @default.
• W2032960995 created "2016-06-24" @default.
• W2032960995 creator A5016443561 @default.
• W2032960995 creator A5052671354 @default.
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• W2032960995 date "2013-07-01" @default.
• W2032960995 modified "2023-10-03" @default.
• W2032960995 title "Castration Induces Parkinson Disease Pathologies in Young Male Mice via Inducible Nitric-oxide Synthase" @default.
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• W2032960995 doi "https://doi.org/10.1074/jbc.m112.443556" @default.
• W2032960995 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3774356" @default.
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