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- W2117698748 abstract "Parkinson's disease is characterized by progressive degeneration of the dopaminergic (DA) neurons in the substantia nigra (SN). However, the mechanism underlying DA cell death remains unclear. While apoptotic cell death has been implicated in DA cell death in Parkinson's disease, autophagy - a regulated cellular process for degrading intracellular proteins and organelles under stress - in Parkinson's disease is not known. Here, we report evidence of autophagy in DA neurons of the SN in a 1-methyl-4-phenyl- 1,2,3,6-tetrahydropyridine (MPTP) model of Parkinson's disease. Mice were treated with saline or MPTP (40 mg/kg) and sacrificed after 7 days, and brain tissue samples were processed for immunohistochemistry using a tyrosine hydroxylase (TH) antibody to reveal the SN area. TH-positive tissues were then processed for transmission electron microscopy and examined for ultrastructural evidence of autophagy. MPTP treatment induced significant morphological changes that closely resembled the autophagic process. This autophagic degeneration was observed in ~35% of DA neurons in MPTP mice. We conclude that at the ultrastructural level MPTP treatment produced a prominent autophagic process in DA neurons. The identification of autophagy in the MPTP model of Parkinson's disease may provide an insight into the mechanism of cell protection and may lead to a novel therapeutic strategy in Parkinson's disease." @default.
- W2117698748 created "2016-06-24" @default.
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- W2117698748 date "2003-05-01" @default.
- W2117698748 modified "2023-09-23" @default.
- W2117698748 title "A Cell Protective Mechanism in a Murine Model of Parkinson's Disease" @default.
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