Abstract
Expression of fibroblast-growth factor receptors (FGFRs) was studied in human fetal neurones, astrocytes and microglia in culture. Northern blot analysis showed that neurones and microglia expressed the mRNAs for FGFR-1, FGFR-2, FGFR-3, FGFR-4 at different levels, whereas astrocytes expressed only FGFR-1 and FGFR-4 mRNAs. Immunocytochemical localization of FGFR-1 revealed that this receptor was predominantly localized on the axon hillock membrane in neurones, and was associated with the plasma membrane of ameboid, activated microglia and of glial-fibrillar acidic protein positive astrocytes. The expression of various members of the FGFR family in all the cell types investigated implicates FGFs in human brain development and functions.
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