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PDGF and FGF2 regulate oligodendrocyte progenitor responses to demyelination
Emma E Frost1, Joseph A Nielsen, Tuan Q Le
1Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814-4799, USA.
Journal of Neurobiology
|January 18, 2003
Summary
Platelet-derived growth factor (PDGF) and fibroblast growth factor 2 (FGF2) significantly promote oligodendrocyte progenitor cell (OP) proliferation during central nervous system (CNS) remyelination. These growth factors are key to successful repair after demyelination.
Area of Science:
- Neuroscience
- Cell Biology
- Immunology
Background:
- Remyelination failure in chronic CNS lesions, like multiple sclerosis, leads to functional impairment.
- Oligodendrocyte progenitor cell (OP) proliferation is crucial for successful CNS repair after demyelination.
Purpose of the Study:
- To identify signals regulating OP proliferation during CNS remyelination.
- To investigate the role of PDGF and FGF2 in OP proliferation in vivo and in vitro.
Main Methods:
- Induced focal demyelination in adult mice using murine hepatitis virus-A59 (MHV-A59) infection.
- Cultured glial cells from demyelinating and remyelinating spinal cords.
- Assessed OP proliferative response and endogenous growth factor activity.
Main Results:
- Identified PDGF and FGF2 as significant mitogens for OP proliferation.
- Demonstrated endogenous PDGF and FGF2 activity in glial cultures from demyelinated CNS.
- Correlated findings with increased in vivo expression of PDGF, FGF2, and their receptors.
Conclusions:
- PDGF and FGF2 pathways are critical for regulating OP proliferation in response to demyelination.
- These findings support the potential of PDGF and FGF2 as therapeutic targets for promoting CNS remyelination.