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Isolation and identification of EG-VEGF/prokineticins as cognate ligands for two orphan G-protein-coupled receptors.

Authors: Masuda, Y  Takatsu, Y  Terao, Y  Kumano, S  Ishibashi, Y  Suenaga, M  Abe, M  Fukusumi, S  Watanabe, T  Shintani, Y  Yamada, T  Hinuma, S  Inatomi, N  Ohtaki, T  Onda, H  Fujino, M 
Citation: Masuda Y, etal., Biochem Biophys Res Commun 2002 Apr 26;293(1):396-402.
Pubmed: (View Article at PubMed) PMID:12054613
DOI: Full-text: DOI:10.1016/S0006-291X(02)00239-5

Endocrine gland-derived vascular endothelial growth factor (EG-VEGF, identical to prokineticin 1) is a novel peptide recently identified as a selective mitogen for endocrine gland endothelial cells. The present study demonstrates that EG-VEGF/prokineticin 1 and a peptide closely related to EG-VEGF, prokineticin 2, are cognate ligands of two orphan G-protein-coupled receptors designated ZAQ (=EG-VEGF/PK-R1) and I5E (=EG-VEGF/PK-R2). EG-VEGF/prokineticin 1 and prokineticin 2 induced a transient increase in intracellular calcium ion concentration ([Ca(2+)](i)) with nanomolar potency in Chinese hamster ovary (CHO) cells expressing EG-VEGF/PK-R1 and -R2 and bind to these cells with high affinity and with different receptor selectivity. EG-VEGF/prokineticins provoke rapid phosphorylation of p44/42 MAP kinase and DNA synthesis in the bovine adrenal capillary endothelial cells (BACE). The mRNAs of both EG-VEGF/PK-R1 and -R2 were expressed in BACE. The identification of the receptors for EG-VEGF/prokineticins may provide a novel molecular basis for the regulation of angiogenesis in endocrine glands.

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CRRD Object Information
CRRD ID: 632409
Created: 2003-08-29
Species: All species
Last Modified: 2004-05-25
Status: ACTIVE



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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.