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Astrocyte stellation induced by tyrosine kinase inhibitors in culture.

Authors
  • Abe, K
  • Saito, H
Type
Published Article
Journal
Brain Research
Publisher
Elsevier
Publication Date
Aug 07, 1999
Volume
837
Issue
1-2
Pages
306–308
Identifiers
PMID: 10434017
Source
Medline
License
Unknown

Abstract

To understand the role of tyrosine kinases in regulation of astrocyte morphology, we investigated the effects of tyrosine kinase inhibitors on morphology of cultured rat cortical astrocytes. Cultured astrocytes exhibited flattened, polygonal morphology in the absence of stimulation, but changed into process-bearing stellate cells in the presence of the tyrosine kinase inhibitor genistein (3-100 microM). Genistein-induced astrocyte stellation was abolished by treatment with colchicine or paclitaxel, indicating the involvement of cytoskeletal elements. The effect of genistein was mimicked by another tyrosine kinase inhibitor herbimycin A, but not by daidzein, an inactive analog of genistein. These results suggest that tyrosine kinases are in an activated state in the absence of stimuli and contribute to the maintenance of polygonal morphology of cultured astrocytes.

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