51. Chemical inhibitors of cyclin-dependent kinases control proliferation, apoptosis and differentiation of oligodendroglial cells
- Author
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Brigitte Malgrange, Jean-Michel Rigo, Véronique Rocher, Gustave Moonen, Shibeshih Belachew, Grégory Hans, and Laurent Nguyen
- Subjects
Indoles ,medicine.medical_treatment ,Endogeny ,Apoptosis ,Developmental Neuroscience ,Cyclin-dependent kinase ,medicine ,Roscovitine ,Animals ,Remyelination ,Cells, Cultured ,Cerebral Cortex ,biology ,Kinase ,Growth factor ,Oligodendrocyte differentiation ,Cell Differentiation ,Cell cycle ,Benzazepines ,Cyclin-Dependent Kinases ,Cell biology ,Rats ,Enzyme Activation ,Oligodendroglia ,medicine.anatomical_structure ,Animals, Newborn ,Purines ,biology.protein ,Cell Division ,Developmental Biology - Abstract
Since cyclin-dependent kinases (Cdks) and their endogenous inhibitors (Cdkis) play an essential role as regulators of cell cycle withdrawal and onset of differentiation within oligodendroglial cells, we assessed here the effects of exogenous chemical Cdk inhibitors (CKIs) on cultured rat cortical oligodendrocyte progenitor cells (OPCs). We showed that purine derivatives and especially roscovitine strongly inhibited OPCs proliferation. In the presence of mitogenic signals, roscovitine synergized with thyroid hormone to stimulate oligodendrocyte differentiation. Roscovitine also prevented oligodendroglial apoptosis induced by growth factor deprivation. We thus demonstrated that small molecular weight chemical CKIs have important effects on crucial events of oligodendroglial development in vitro. This might open prospects for using these apparently well tolerated agents in remyelination strategies.
- Published
- 2003