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Neurosci Lett. 2000 Aug 18;290(1):41-4.

Accumulation of human alpha-synuclein in different cytoskeletons in Lewy bodies in brains of dementia with Lewy bodies.

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  • 1Department of Psychiatry, Yokohama City University School of Medicine, 3-9 Fukuura, Kanazawa-ku, 236-0004, Yokohama, Japan.

Abstract

We investigated the origin of alpha-synuclein-immunoreactive components in Lewy bodies (LB) in brains of dementia with Lewy bodies (DLB) using immunohistochemistry and immunoelectron microscopy with anti-alpha-synuclein antibodies and anti-cytoskeleton antibodies. alpha-Synuclein-positive LB light microscopically consisted of phosphorylated neurofilament (PN)-positive LB, tubulin-positive LB and LB that were negative for both stains. Immunoelectron microscopically, PN-positive LB were composed of PN-positive and alpha-synuclein-positive filamentous components, suggesting that these filamentous components originate from neurofilaments with partially reduced immunoreactivity and alpha-synuclein accumulation. However, tubulin-positive LB were composed of tubulin-positive and alpha-synuclein-positive tubular components, suggesting that these tubular components originate from microtubules with diffusely reduced immunoreactivity and alpha-synuclein accumulation. The results of the present study suggest that alpha-synuclein accumulates in different cytoskeletons in the LB in DLB brains presumably due to a blockage of axonal transport.

PMID:
10925170
[PubMed - indexed for MEDLINE]
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