Involvement of cyclin-dependent kinases in axotomy-induced retinal ganglion cell death.

Details

Serval ID
serval:BIB_82B95D4B4B2C
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Involvement of cyclin-dependent kinases in axotomy-induced retinal ganglion cell death.
Journal
Journal of Comparative Neurology
Author(s)
Lefèvre K., Clarke P.G., Danthe E.E., Castagné V.
ISSN
0021-9967 (Print)
ISSN-L
0021-9967
Publication state
Published
Issued date
2002
Volume
447
Number
1
Pages
72-81
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Abstract
We have tested the role of cyclin-dependent kinases (CDKs) in the type 3B death of axotomized retinal ganglion cells, by injecting intraocularly olomoucine, roscovitine, or butyrolactone I. Each of these inhibits CDK1, CDK2, and CDK5; CDK1 and CDK2 are involved in cell proliferation, whereas CDK5 is involved in neuronal differentiation. The inhibitors partially protected ganglion cells against the effects of axotomy. These agents may affect the ganglion cells directly, because CDK1, its regulatory subunit cyclin B1, and CDK5 were identified immunohistochemically in the perikarya of ganglion cells, and this was confirmed for CDK1 and CDK5 in Western blots of the ganglion cell layer. These blots showed an axotomy-induced phosphorylation of CDK5 occurring remarkably quickly (within 6 hours of axotomy) but little if any change in the phosphorylation state of CDK1. In addition, we studied the expression of proliferation markers, including proliferating cell nuclear antigen (PCNA) and the synthesis of DNA, by immunohistochemical and autoradiographic methods. Normal or axotomized ganglion cells did not express PCNA and did not synthesize DNA. Although we cannot exclude the possibility that axotomized ganglion cells may leave their quiescent state, our data show that they did not progress beyond the G1 phase of the cell cycle. Finally, in contrast to inhibitors of CDKs, cell cycle blockers with different targets than CDKs did not protect ganglion cells. Globally, our results suggest that axotomy-induced death of ganglion cells involves the activation of CDK1, CDK2, or CDK5 (most probably CDK5) but not the full cell cycle machinery.
Keywords
Animals, Axotomy, Biological Markers/analysis, Bromodeoxyuridine/diagnostic use, CDC2 Protein Kinase/metabolism, Cell Cycle Proteins/antagonists & inhibitors, Cell Cycle Proteins/metabolism, Cell Death/drug effects, Cell Death/physiology, Cell Differentiation/drug effects, Cell Differentiation/physiology, Cell Division/drug effects, Cell Division/physiology, Chick Embryo, Cyclin B/metabolism, Cyclin B1, Cyclin-Dependent Kinase 5, Cyclin-Dependent Kinases/antagonists & inhibitors, Cyclin-Dependent Kinases/metabolism, Dose-Response Relationship, Drug, Enzyme Inhibitors/pharmacology, Nerve Degeneration/enzymology, Nerve Degeneration/physiopathology, Proliferating Cell Nuclear Antigen/metabolism, Retinal Ganglion Cells/cytology, Retinal Ganglion Cells/drug effects, Thymidine/diagnostic use
Pubmed
Web of science
Create date
20/01/2008 17:49
Last modification date
20/08/2019 14:42
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