Osteopontin is upregulated during in vivo demyelination and remyelination and enhances myelin formation in vitro.
Mol Cell Neurosci
; 25(4): 707-21, 2004 Apr.
Article
en En
| MEDLINE
| ID: mdl-15080898
We have used in vitro oligodendrocyte differentiation and the in vivo remyelination model, the cuprizone model, to identify genes regulating oligodendrocyte function and remyelination. One of the genes we identified, osteopontin (opn), is a secreted glycoprotein with cytokine-like, chemotactic, and anti-apoptotic properties that contains an Arg-Gly-Asp (RGD) cell adhesion motif-mediating interactions with several integrins. Both microglia and astrocytes in demyelinating brain regions of cuprizone-fed mice expressed OPN protein. Recombinant OPN protein produced in a baculovirus expression system induced proliferation of both the rat CG-4 and the mouse Oli-neu oligodendrocyte precursor (OLP)-like cell lines in a dose-dependent manner. In addition, recombinant OPN treatment stimulated both myelin basic protein (MBP) synthesis and myelin sheath formation in mixed cortical cultures from embryonic mouse brain, an in vitro primary culture model of myelination. Interestingly, myelinating mixed cultures prepared from OPN(-/-) mice contained significantly less MBP compared to wild-type cultures after 17 days in culture. We propose that in the central nervous system, OPN may act as a novel regulator of myelination and remyelination.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Sialoglicoproteínas
/
Encéfalo
/
Regulación hacia Arriba
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Enfermedades Desmielinizantes
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Vaina de Mielina
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Regeneración Nerviosa
Idioma:
En
Revista:
Mol Cell Neurosci
Asunto de la revista:
BIOLOGIA MOLECULAR
/
NEUROLOGIA
Año:
2004
Tipo del documento:
Article
País de afiliación:
Suiza
Pais de publicación:
Estados Unidos