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Trends Endocrinol Metab. 2005 Sep;16(7):320-6.

G-protein-coupled receptor signaling and the EGF network in endocrine systems.

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  • 1Division of Reproductive Biology, Department of Obstetrics and Gynecology, Stanford University, Stanford, CA 94305-5317, USA.


The epidermal growth factor (EGF) network is composed of a complex array of growth factors synthesized as precursors and expressed on the cell surface. These latent growth factors are activated by cleavage and shedding from the cell surface and act by binding to various homo- and hetero-dimers of the EGF receptors (ErbBs). Although the exact molecular steps are poorly understood, ligand binding to G-protein-coupled receptors as diverse as the beta-adrenoceptors or the lysophosphatidic acid receptors leads to shedding of EGF growth factors and activation of EGF receptors. Recent observations from the pituitary and in the ovary are providing new insight into the role of this network in endocrine systems.

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