In vitro differentiation of neural progenitor cells from prenatal rat brain: Common cell surface glycoprotein on three glial cell subsets
✍ Scribed by Sabine Blass-Kampmann; Andrea Kindler-Röhrborn; Helmut Deissler; Donatella D'Urso; Manfred F. Rajewsky
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 738 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0360-4012
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✦ Synopsis
Glial progenitor cell differentiation and cell lineage relationships during brain development are complex hierarchical processes depending on genetic programming, cell-cell interactions, and microenvironmental factors. The identification of precursor cell-specific antigens provides a tool for the study of both normal development and deviations from lineage-specific differentiation associated with malignant transformation. Monoclonal antibody (mAb) RB13-6 recognizes a 130-kDa cell surface glycoprotein (gp130 RB13-6 ) expressed by a subset of 9 OAcGD3-positive glial precursor cells scattered in the rat neuroepithelium on prenatal day (PRD) 13. During prenatal development the fraction of gp130 RB13-6 -positive fetal brain cells (FBC) decreased from about 18% (PRD 14) to about 1.5% (PRD 22), coinciding with increasing fractions of more mature cell types, as indicated by the elevated expression of p24 RB21-15 , another cell surface determinant specified by mAb RB21-15 (Kindler-Ro ¨hrborn et al.; Differentiation 30:53-60, 1985) and other neural cell type-specific markers. Accordingly, gp130 RB13-6positive precursor cells were localized in the ventricular zones throughout brain development. Concomitant with their formation and in the adult rat brain, ependymal layers lining the ventricular surface, choroid plexus, and the leptomeninges were intensely labeled by anti-gp130 RB13-6 mAb. As visualized by confocal laser scanning microscopy of FBC cultures from PRD 13, gp130 RB13-6 was coexpressed with the RC1 antigen by progenitor cells morphologically resembling radial glia cells. In addition, a very small subpopulation of astrocytes coexpressing gp130 RB13-6 and glial fibrillary acidic protein (GFAP; F5%) occurred 3 days after seeding. Primary FBC cultures from PRD 18 contained an increased subset of astrocytes coexpressing gp130 RB13-6 and GFAP (D25% of all gp130 RB13-6 expressing cells), apparently generated from gp130 RB13-6 -positive precursors. Corresponding to in vivo conditions, ciliated ependymal cells but also microglial cells/macrophages and leptomeningeal cells showed strong expression of gp130 RB13-6 in culture. We thus present a new glycoprotein on the cell surfaces of a glial progenitor cell subset for further studies of cell lineage relationships between radial glia cells, astrocytes, and ependymal cells.