Abstract
Immediate consequences of growth factor-receptor interaction include tyrosine-specific protein phosphorylations, inositol lipid breakdown and changes in cytoplasmic pH (pHi) and in the level of free Ca2+. The rise in pHi has a permissive effect on DNA synthesis and is mediated by Na+/H+ exchanger in the plasma membrane, which is turned on by protein kinase C. The Ca2+ signal is generated through the inositol lipid pathway and may contribute to the expression of certain proto-oncogenes. Monoclonal antibodies to the epidermal growth factor receptor can act as partial agonists in that they can induce tyrosine kinase activity without inducing inositol lipid breakdown and ionic changes. These antibodies fail to induce DNA synthesis, suggesting that tyrosine kinase activation is not sufficient for stimulation of cell proliferation.
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© 1987 Plenum Press, New York
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Moolenaar, W.H., Defize, L.H.K., Tilly, B.C., Bierman, A.J., de Laat, S.W. (1987). Mechanisms of Signal Transduction by Growth Factor Receptors. In: Wirtz, K.W.A. (eds) Membrane Receptors, Dynamics, and Energetics. NATO ASI Series, vol 133. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-5335-5_4
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DOI: https://doi.org/10.1007/978-1-4684-5335-5_4
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