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. 1987 Aug;84(15):5459–5463. doi: 10.1073/pnas.84.15.5459

Astroglial and fibroblast growth factors have neurotrophic functions for cultured peripheral and central nervous system neurons.

K Unsicker, H Reichert-Preibsch, R Schmidt, B Pettmann, G Labourdette, M Sensenbrenner
PMCID: PMC298877  PMID: 3474662

Abstract

Embryonic and neonatal neurons require specific trophic supplements for their survival and the induction of transmitter-synthesizing enzymes in vivo and in vitro. Acidic and basic fibroblast growth factor (aFGF, bFGF) and the closely related astroglial growth factors AGF-1 and AGF-2 were studied for putative neurotrophic functions using dissociated, highly neuron-enriched cultures from chick and rat peripheral ganglia and central nervous system tissues. Embryonic chick ciliary ganglion neurons were the only peripheral neurons that responded to bFGF and AGF-2 by enhanced survival equivalent to that obtained with ciliary neurotrophic factor. Half-maximal effects were achieved with bFGF at 360 pg/ml or AGF-2 at 3 ng/ml. Small effects seen with aFGF could be potentiated by adding heparin at 1 microgram/ml. bFGF, but not ciliary neurotropic factor, also promoted neuron survival after the factor was bound to polyornithine and laminin. Both AGF-2 and ciliary neurotropic factor induced choline acetyltransferase activity during 48 hr. AGFs and FGFs also enhanced the long-term survival of embryonic chick spinal cord neurons, including motoneurons that had been retrogradely labeled with rhodamine isothiocyanate. These results demonstrate the potency of a class of mitogenic growth factors as neurotrophic agents for embryonic ciliary ganglion and spinal cord neurons--adding to the emerging evidence that mitogenic and neuronal growth factors are not strictly separate entities.

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Selected References

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