Comparison of neuregulin-1 expression in olfactory ensheathing cells, Schwann cells and astrocytes

Thompson, R., Roberts, B., Alexander, C. L., Williams, S. K. and Barnett, S. C. (2000) Comparison of neuregulin-1 expression in olfactory ensheathing cells, Schwann cells and astrocytes. Journal of Neuroscience Research, 61(2), pp. 172-185. (doi: 10.1002/1097-4547(20000715)61:2<172::AID-JNR8>3.0.CO;2-C) (PMID:10878590)

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Abstract

Recently we demonstrated that a member of the neuregulin-1 (NRG-1) family of growth factors is a mitogen and survival factor for olfactory ensheathing cells (OECs). OECs are specialized glial cells within the olfactory system that are believed to play a role in the continual nerve re-growth of this tissue. OECs share properties with both astrocytes and Schwann cells but are likely to be a distinct glial cell type. NRG-1s have been found to be important regulators of Schwann cells in vivo, but the role of NRG-1 for OECs is less clear. The nrg-1 gene produces at least 12 different isoforms, that are likely to have different functions, due to alternative splicing of its mRNA. In this study, the expression of NRG-1 mRNAs in OECs was compared with other glial cells and their corresponding tissue sources. Cultured glial cells, unlike their tissue sources, expressed NRG-1 mRNAs containing the α EGF-like domain and expressed only the type 1β isoform that lacks the glycosylated spacer domain. This correlated with expression of these isoforms during olfactory nerve degeneration in vivo. Although OECs expressed mRNA for all NRG-1 isoforms, the protein could not be detected in concentrated supernatant, or on the cell surface by immunofluorescence, but was detected in the nucleus or cytoplasm (depending on the isoform). These data support the hypothesis that NRG-1s play a functional role in OEC biology.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Alexander, Miss Claire and Barnett, Professor Susan
Authors: Thompson, R., Roberts, B., Alexander, C. L., Williams, S. K., and Barnett, S. C.
College/School:College of Medical Veterinary and Life Sciences > Institute of Infection Immunity and Inflammation
Journal Name:Journal of Neuroscience Research
Publisher:Wiley
ISSN:0360-4012
ISSN (Online):1097-4547
Published Online:27 June 2000

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