Glial hyaluronate-binding protein expression in aggregating brain cell cultures.
We analyzed the expression of glial hyaluronate-binding protein (GHAP), an integral component of the extracellular matrix, in aggregating brain cell cultures of fetal rat telencephalon using immunofluorescence. GHAP immunoreactivity appeared after 1 week in culture, simultaneous with the first deposits of myelin basic protein, and showed a development-dependent increase. Comparison of glia-enriched and neuron-enriched cultures showed that only glial cells express GHAP. Three peptide growth factors, epidermal growth factor, fibroblast growth factor and platelet-derived growth factor, which are known to stimulate the differentiation of glial cells, modulated the deposit of GHAP immunoreactivity. The 3-dimensional structure of aggregate cultures promoted GHAP deposition, suggesting that cell-cell interactions are required for extracellular matrix formation. Furthermore GHAP production seemed to depend on the developmental stage of the glial cells.[1]References
- Glial hyaluronate-binding protein expression in aggregating brain cell cultures. Monnet-Tschudi, F., Zurich, M.G., Asher, R., Honegger, P. Dev. Neurosci. (1993) [Pubmed]
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