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Modulatory role of platelet-derived growth factor on cytokine-induced nerve growth factor synthesis in rat glomerular mesangial cells.

ABSTRACT: Recent evidence indicates that cytokines are potent inducers of nerve growth factor (NGF) expression in peripheral tissues and in brain. Cultured rat glomerular mesangial cells respond to interleukin-1 beta (IL-1 beta) and tumour necrosis factor-alpha (TNF-alpha) by increased NGF synthesis. We found that co-stimulation of rat glomerular mesangial cells with platelet-derived growth factor (PGDF-BB) and IL-1 beta/TNF-alpha significantly augments the IL-1 beta/TNF-alpha-induced NGF mRNA levels and NGF synthesis. In contrast, preincubation with PDGF-BB drastically reduces NGF gene expression and NGF protein synthesis in response to IL-1 beta/TNF-alpha stimulation. Thus our results indicate that PDGF-BB is a potent modulator of cytokine-induced NGF expression; its precise action is critically depending on the time at which the PDGF receptor is activated.


PROVIDER: S-EPMC1136171 | BioStudies | 1995-01-01

SECONDARY ACCESSION(S): 10.1042/bj3120707

REPOSITORIES: biostudies

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