Critical role of sphingosine-1-phosphate receptor 2 (S1PR2) in acute vascular inflammation.

TitleCritical role of sphingosine-1-phosphate receptor 2 (S1PR2) in acute vascular inflammation.
Publication TypeJournal Article
Year of Publication2013
AuthorsZhang G, Yang L, Kim GSeok, Ryan K, Lu S, O'Donnell RK, Spokes K, Shapiro N, Aird WC, Kluk MJ, Yano K, Sanchez T
Date Published2013 Jul 18
KeywordsAcute Disease, Animals, Biomarkers, Blood Coagulation, Blood Vessels, Capillary Permeability, Endothelium, Vascular, Endotoxemia, Enzyme Activation, Human Umbilical Vein Endothelial Cells, Humans, Immunohistochemistry, Inflammation, Inflammation Mediators, Kidney, Mice, NF-kappa B, p38 Mitogen-Activated Protein Kinases, Phenotype, Pyrazoles, Pyridines, Receptors, Lysosphingolipid, Signal Transduction, Stromal Cells

The endothelium, as the interface between blood and all tissues, plays a critical role in inflammation. Sphingosine-1-phosphate (S1P) is a bioactive sphingolipid, highly abundant in plasma, that potently regulates endothelial responses through interaction with its receptors (S1PRs). Here, we studied the role of S1PR2 in the regulation of the proadhesion and proinflammatory phenotype of the endothelium. By using genetic approaches and a S1PR2-specific antagonist (JTE013), we found that S1PR2 plays a key role in the permeability and inflammatory responses of the vascular endothelium during endotoxemia. Experiments with bone marrow chimeras (S1pr2(+/+) → S1pr2(+/+), S1pr2(+/+) → S1pr2(-/-), and S1pr2(-/-) → S1pr2(+/+)) indicate the critical role of S1PR2 in the stromal compartment, in the regulation of vascular permeability and vascular inflammation. In vitro, JTE013 potently inhibited tumor necrosis factor α-induced endothelial inflammation. Finally, we provide detailed mechanisms on the downstream signaling of S1PR2 in vascular inflammation that include the activation of the stress-activated protein kinase pathway that, together with the Rho-kinase nuclear factor kappa B pathway (NF-kB), are required for S1PR2-mediated endothelial inflammatory responses. Taken together, our data indicate that S1PR2 is a key regulator of the proinflammatory phenotype of the endothelium and identify S1PR2 as a novel therapeutic target for vascular disorders.

Alternate JournalBlood
PubMed ID23723450
Grant ListHL094465 / HL / NHLBI NIH HHS / United States
Related Faculty: 
Michael Kluk, M.D., Ph.D. Teresa Sanchez, Ph.D.

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