title: Enhancement of sphingosine 1-phosphate-induced migration of vascular endothelial cells and smooth muscle cells by an EDG-5 antagonist.
abstract: Sphingosine 1-phosphate (Sph-1-P), a bioactive lysophospholipid capable of inducing a wide spectrum of biological responses, acts as an intercellular mediator, through interaction with the endothelial differentiation gene (EDG)/S1P family of G protein-coupled receptors. In this study, the effects of JTE-013, a specific antagonist of the migration-inhibitory receptor EDG-5, on Sph-1-P-elicited responses were examined in human umbilical vein endothelial cells (HUVECs) and vascular smooth muscle cells (SMCs), which expressed EDG-5 protein weakly and abundantly, respectively. This pyrazolopyridine compound reversed the inhibitory effect of Sph-1-P on SMC migration and further enhanced Sph-1-P-stimulated HUVEC migration. In contrast, its effect on Sph-1-P-induced intracellular Ca(2+) mobilization was marginal. Our results indicate that specific regulation of Sph-1-P-modulated migration responses in vascular cells can be achieved by EDG-5 antagonists and that manipulation of Sph-1-P biological activities by each EDG antagonist may lead to a therapeutical application to control vascular diseases.
authors.affiliation: Department of Laboratory Medicine, Yamanashi Medical University, Nakakoma, Yamanashi, Japan.
authors.forename: Makoto
authors.initials: M
authors.lastname: Osada
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Yatomi
authors.forename: Tsukasa
authors.initials: T
authors.lastname: Ohmori
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Ikeda
authors.forename: Yukio
authors.initials: Y
authors.lastname: Ozaki
mesh_terms: D020013:Calcium Signaling / Q000502:physiology; D002465:Cell Movement / Q000187:drug effects / Q000502:physiology*; D002478:Cells, Cultured; D004730:Endothelium, Vascular / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D005456:Fluorescent Dyes / Q000378:metabolism; D016257:Fura-2 / Q000378:metabolism; D006801:Humans; D017874:Immediate-Early Proteins / Q000378:metabolism; D008246:Lysophospholipids; D009131:Muscle, Smooth, Vascular / Q000166:cytology; D032389:Myocytes, Smooth Muscle / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D011720:Pyrazoles / Q000737:chemistry; D011725:Pyridines / Q000737:chemistry; D011956:Receptors, Cell Surface / Q000037:antagonists & inhibitors*; D043562:Receptors, G-Protein-Coupled; D049312:Receptors, Lysophospholipid; D013110:Sphingosine / Q000031:analogs & derivatives* / Q000494:pharmacology*
chemical_list: D005456:Fluorescent Dyes; D017874:Immediate-Early Proteins; D008246:Lysophospholipids; D011720:Pyrazoles; D011725:Pyridines; D011956:Receptors, Cell Surface; D043562:Receptors, G-Protein-Coupled; D049312:Receptors, Lysophospholipid; C118531:pyrazolopyridine; C060506:sphingosine 1-phosphate; D013110:Sphingosine; D016257:Fura-2