Sphingosine-1-phosphate: A bioactive lipid that confers high-density lipoprotein with vasculoprotection mediated by nitric oxide and prostacyclin

作者：Lina Badimón, Cristina Rodrı́guez, María González-Díez, José Martínez‐González · 发表于：Thrombosis and Haemostasis · 年份：2009 · DOI：10.1160/th08-10-0675 · 被引用次数：56 · 研究领域：Sphingolipid Metabolism and Signaling、Protein Kinase Regulation and GTPase Signaling、Ion Transport and Channel Regulation

Sphingosine-1-phosphate (S1P) is a bioactive lipid generated in the intracellular membranes from the metabolism of sphingomyelin. Once secreted/exported by cells of haematopoietic origin and vascular cells S1P interacts with plasma proteins and accumulates in high-density lipoprotein (HDL). Growing evidence indicates that HDL-associated S1P is responsible for the beneficial effects of these lipoproteins on vasorelaxation, cell survival, cell adhesiveness, angiogenesis and synthesis of two powerful endogenous anti-atherogenic and anti-thrombotic molecules such as nitric oxide (NO) and prostacyclin (PGI(2)). It is likely that vascular effects of HDL-S1P are regulated by the local expression of S1P receptors. Five G protein-coupled receptors (S1P(1) to S1P(5)), with differential expression patterns and dissimilar coupling mechanism to G protein subunits, have been identified in the vasculature. This review is focused on the central role of S1P as a bioactive component that confers vasculoprotective properties to HDL by eliciting a wide range of biological responses on endothelial and smooth muscle cells largely dependent on the up-regulation of NO and prostacyclin.