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The histopathological hallmark of Parkinson’s disease (PD) is the presence of fibrillar aggregates referred to as Lewy bodies (LBs), in which α-synuclein is a major constituent. Pale bodies, the precursors of LBs, may serve the material for that LBs continue to expand. LBs consist of a heterogeneous mixture of more than 90 molecules, including PD-linked gene products (α-synuclein, DJ-1, LRRK2, parkin, and PINK-1), mitochondria-related proteins, and molecules implicated in the ubiquitin–proteasome system, autophagy, and aggresome formation. LB formation has been considered to be a marker for neuronal degeneration because neuronal loss is found in the predilection sites for LBs. However, recent studies have indicated that nonfibrillar α-synuclein is cytotoxic and that fibrillar aggregates of α-synuclein (LBs and pale bodies) may represent a cytoprotective mechanism in PD.

Autoren:   Koichi Wakabayashi, Kunikazu Tanji, Saori Odagiri, Yasuo Miki, Fumiaki Mori, Hitoshi Takahashi
Journal:   Molecular Neurobiology
Jahrgang:   2012
DOI:   10.1007/s12035-012-8280-y
Erscheinungsdatum:   24.05.2012

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