Ontology type: schema:ScholarlyArticle
2011-11
AUTHORSQi Xuan, Sheng-Li Xu, De-Hong Lu, Shun Yu, Ming Zhou, Kenji Uéda, Ye-Qing Cui, Bo-Yang Zhang, Piu Chan
ABSTRACTAlthough the increased prevalence of Parkinson's disease (PD) with aging suggests that aging processes predispose dopamine neurons to degeneration, the mechanism involved remains unknown. Dopamine neurons contain significant amounts of neuromelanin, and the amount of neuromelanin increases with aging. In the present study, age-related changes in the number of nigral neurons expressing neuromelanin (NM), α-synuclein, and tyrosine hydroxylase (TH) were stereologically analyzed in the postmortem brains of 28 healthy humans with an age range of 17-84 years. Stereological counting of NM content, α-synuclein content, and TH immunoreactivity revealed significant accumulation of NM and α-synuclein in neurons during the aging process. In cells containing a large amount of NM, α-synuclein-immunoreactive cells in aged individuals outnumbered those of younger individuals. In non-NM cells, the α-synuclein expression profile was similar across age groups. Furthermore, TH-immunoreactive neurons decreased significantly with aging, which was associated with accumulation of NM and α-synuclein. Our results suggest that age related accumulation of NM might induce α-synuclein over-expression and thereby make dopamine neurons more vulnerable to injuries. More... »
PAGES1575-1583
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DOIhttp://dx.doi.org/10.1007/s00702-011-0636-3
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306 TRIPLES
21 PREDICATES
79 URIs
37 LITERALS
25 BLANK NODES