Here we review findings indicating that neurotrophins such as NGF promote changes in gene transcription that in turn influence the ways that cells subsequently respond to trophic factors. As a result, initial responses of "naïve" cells to NGF and other trophic agents differ from those of cells with prior NGF exposure. We discuss specific examples based on reports in the literature as well as on data derived from a serial analysis of gene expression (SAGE) study of NGF-promoted transcriptional changes in PC12 pheochromocytoma cells.
- Trophic factors
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