Human gastrin-releasing peptide receptor mediates sustained CREB phosphorylation and transactivation in HuTu 80 duodenal cancer cells

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Abstract

The G protein-coupled human gastrin-releasing peptide receptor (hGRP-R) is frequently found aberrantly expressed in human cancers of the colon, stomach, and lung, and its ligand-specific activation has been implicated in cell proliferation and differentiation. Here, we demonstrated hGRP-R activation stimulated sustained cyclic AMP response element binding protein (CREB) phosphorylation and transactivation in duodenal cancer cells through a protein kinase C and partially p38 mitogen-activated protein kinase-dependent pathway. In contrast, intracellular calcium, ERK1/2, protein kinase A, and PI3 kinase were not involved. This novel signaling mechanism might be of importance for regulation of CREB-dependent gene expression in human cancer expressing functional hGRP-R. © 2002 Published by Elsevier Science B.V. on behalf of the Federation of European Biochemical Societies.

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Qu, X., Xiao, D., & Weber, H. C. (2002). Human gastrin-releasing peptide receptor mediates sustained CREB phosphorylation and transactivation in HuTu 80 duodenal cancer cells. FEBS Letters, 527(1–3), 109–113. https://doi.org/10.1016/S0014-5793(02)03177-0

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