Alpha-synuclein immunoreactivity in normal and neoplastic Schwann cells.

Abstract:

:Alpha-synuclein is known to play an important role in several neurodegenerative diseases. Moreover, it is expressed in central nervous system neuronal tumors, and another member of the synuclein family, gamma-synuclein, is overexpressed in breast and ovarian carcinomas. However, the expression of alpha-synuclein has not been reported hitherto in the peripheral nervous system (PNS). In the present study, we investigated normal PNS tissue and schwannomas in human postmortem and biopsy samples using both immunocytochemistry and immunoelectron microscopy with antibodies against alpha-, beta- and gamma-synuclein. In normal PNS tissue, Schwann cells, but not axons or myelin, were immunopositive for alpha-synuclein. In schwannomas, almost all of the tumor cells showed diffuse cytoplasmic staining for alpha-synuclein (30 cases). Ultrastructurally, alpha-synuclein immunoreactivity was found in the cytoplasm of normal and neoplastic Schwann cells, in association with the plasma membrane, ribosomes, rough endoplasmic reticulum, small vesicles, Golgi apparatus and the nuclear outer membrane. No beta- or gamma-synuclein immunoreactivity was found in those cells. These results indicate that in the PNS, alpha-synuclein is a useful marker of Schwann cells and that it is not involved in tumorigenesis.

journal_name

Acta Neuropathol

journal_title

Acta neuropathologica

authors

Mori F,Inenaga C,Yoshimoto M,Umezu H,Tanaka R,Takahashi H,Wakabayashi K

doi

10.1007/s004010100443

subject

Has Abstract

pub_date

2002-02-01 00:00:00

pages

145-51

issue

2

eissn

0001-6322

issn

1432-0533

journal_volume

103

pub_type

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