Mitogen-activated protein kinase activation is insufficient for growth factor receptor-mediated PC12 cell differentiation.

Molecular and Cellular Biology
R R VaillancourtG L Johnson

Abstract

When expressed in PC12 cells, the platelet-derived growth factor beta receptor (beta PDGF-R) mediates cell differentiation. Mutational analysis of the beta PDGF-R indicated that persistent receptor stimulation of the Ras/Raf/mitogen-activated protein (MAP) kinase pathway alone was insufficient to sustain PC12 cell differentiation. PDGF receptor activation of signal pathways involving p60c-src or the persistent regulation of phospholipase C gamma was required for PC12 cell differentiation. beta PDGF-R regulation of phosphatidylinositol 3-kinase, the GTPase-activating protein of Ras, and the tyrosine phosphatase, Syp, was not required for PC12 cell differentiation. In contrast to overexpression of oncoproteins involved in regulating the MAP kinase pathway, growth factor receptor-mediated differentiation of PC12 cells requires the integration of other signals with the Ras/Raf/MAP kinase pathway.

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Citations

Feb 29, 2000·Journal of Neurochemistry·A VaskovskyR Pinkas-Kramarski
Mar 29, 2012·Neurogenetics·Qiang WenWenhua Zheng
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