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- W2053103587 abstract "Application of aged animals to studies of Parkinson's disease (PD) will be beneficial to improve the understanding of its pathogenesis. The senescence-accelerated mouse prone8 (SAMP8) mouse has an early onset of senility and a short life span, characterized by learning and memory impairment, and affective disturbance in the aging process. There is no animal currently being used as a PD model that exhibits these characteristics. Application of the SAMP8 mouse to PD research may have several merits. For the first time, we have investigated damage of the nigrostriatal system in the SAMP8 mouse induced by 1-methyl-4-phenyl-1, 2, 3, 6-tetrahydropyridine (MPTP). Male SAMP8 mice (12 weeks) were treated with four subcutaneous injections of MPTP (20 mg/kg at 2 h intervals): spontaneous activity decreased significantly after the third injection, and recovered 48 h after the first injection. In MPTP-SAMP8 mice, the tyrosine hydroxylase (TH)-positive neuronal loss at 6 h (7.06%), 24 h (12.79%), 3 days (22.49%), and 8 days (42.39%), while striatal dopamine (DA) levels decreased at 6 h by 79.09%, at 24 h by 80.33%, at 3 days by 83.86%, and at 8 days by 80.14%. These results indicated that there were marked decreases in striatal DA levels and a loss of dopaminergic neurons in the substantia nigra, with the behavior change following shortly thereafter, in MPTP-SAMP8 mice. On the basis of the current findings, the SAMP8 mouse is also vulnerable to neurotoxic effects of MPTP. These data suggest that the SAMP8 mouse may be utilized in PD research." @default.
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- W2053103587 date "2008-12-01" @default.
- W2053103587 modified "2023-10-12" @default.
- W2053103587 title "Damage to the nigrostriatal system in the MPTP-treated SAMP8 mouse" @default.
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- W2053103587 doi "https://doi.org/10.1016/j.neulet.2008.10.070" @default.
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