Sphingosine-1-phosphate prevents permeability increases via activation of endothelial sphingosine-1-phosphate receptor 1 in rat venules

Sphingosine-1-phosphate prevents permeability increases via activation of endothelial sphingosine-1-phosphate receptor 1 in rat venules.

Sphingosine-1-phosphate (S1P) has been demonstrated to enhance endothelial barrier function in vivo and in vitro. However, different S1P receptor subtypes have been indicated to play different or even opposing roles in the regulation of vascular barrier function. This study aims to differentiate the roles of endogenous endothelial S1P subtype receptors in the regulation of permeability in intac...

Sphingosine-1-phosphate signaling in endothelial activation.

The signaling and functions of the Endothelial Differentiation Gene (EDG) family of G protein-coupled receptors have been extensively elucidated. All the members of EDG family were shown to be receptors for lysosphingolipids or lysophospholipids. EDG-1, the prototype of EDG family receptors, is a high affinity receptor for serum-borne bioactive lipid, Sphingosine-1-phosphate (S1P). S1P, secrete...

Sphingosine 1-phosphate regulates regeneration and fibrosis after liver injury via sphingosine 1-phosphate receptor 2.

Sphingosine 1-phosphate (S1P), a bioactive lipid mediator, stimulates proliferation and contractility in hepatic stellate cells, the principal matrix-producing cells in the liver, and inhibits proliferation via S1P receptor 2 (S1P(2)) in hepatocytes in rats in vitro. A potential role of S1P and S1P(2) in liver regeneration and fibrosis was examined in S1P(2)-deficient mice. Nuclear 5-bromo-2'-d...

The Sphingosine 1-Phosphate Receptor

Endothelial functions of sphingosine-1-phosphate.

The biologically active sphingolipid sphingosine-1-phosphate (S1P) plays key functions in the immune, inflammatory, and cardiovascular systems. In the vasculature, S1P and its receptors are involved in vessel morphogenesis and angiogenesis during embryonic development and in the adult organism both under normal and pathological conditions. Via its actions on endothelial and smooth muscle cells,...