Sphingosine signaling and atherogenesis.
Sphingosine-1-phosphate (S1P) has diverse biological functions acting inside cells as a second messenger to regulate cell proliferation and survival, and extracellularly, as a ligand for a group of G protein-coupled receptors (GPCRs) named the endothelial differentiation gene (EDG) family. Five closely related GPCRs of EDG family (EDG1, EDG3, EDG5, EDG6, and EDG8) have recently been identified as high-affinity S1P receptors. These receptors are coupled via Gi, Gq, G12/13, and Rho. The signaling pathways are linked to vascular cell migration, proliferation, apoptosis, intracellular Ca2+ mobilization, and expression of adhesion molecules. The formation of an atherosclerotic lesion occurs through activation of cellular events that include monocyte adhesion to the endothelium and vascular smooth muscle cell (VSMC) migration and proliferation. Thus, S1P signaling may play an important role in the pathogenesis of atherosclerotic vascular disease. This review highlights S1P signalling in vascular cells and its involvement in the formation of atherosclerotic lesions.
Xu
Cang-bao
CB
Division of Experimental Vascular Research, Institute of Medicine, Lund University, Sweden. Cang-Bao.Xu@med.lu.se
Hansen-Schwartz
Jacob
J
Edvinsson
Lars
L
D000818:Animals; D017209:Apoptosis; D001161:Arteriosclerosis / Q000209:etiology; D002455:Cell Division; D002465:Cell Movement; D016207:Cytokines / Q000502:physiology; D006801:Humans; D008246:Lysophospholipids / Q000378:metabolism / Q000502:physiology*; D009131:Muscle, Smooth, Vascular / Q000166:cytology; D017853:Phosphotransferases (Alcohol Group Acceptor) / Q000378:metabolism / Q000502:physiology*; D043562:Receptors, G-Protein-Coupled / Q000502:physiology*; D015398:Signal Transduction / Q000502:physiology*; D013110:Sphingosine / Q000031:analogs & derivatives / Q000378:metabolism / Q000502:physiology*; D000099157:Sphingosine Kinase
D016207:Cytokines; D008246:Lysophospholipids; D017853:Phosphotransferases (Alcohol Group Acceptor); D043562:Receptors, G-Protein-Coupled; D013110:Sphingosine; D000099157:Sphingosine Kinase; C060506:sphingosine 1-phosphate