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HDL induces no-dependent vasorelaxation via the lysophospholipid receptor S1P(3)

Academic Article
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Overview

authors

  • Nofer, J. R.
  • van der Giet, M.
  • Tolle, M.
  • Wolinska, I.
  • Lipinski, K. V. W.
  • Baba, H. A.
  • Tietge, U. J.
  • Godecke, A.
  • Ishii, I.
  • Kleuser, B.
  • Schafers, M.
  • Fobker, M.
  • Zidek, W.
  • Assmann, G.
  • Chun, Jerold
  • Levkau, B.

publication date

  • February 2004

journal

  • Journal of Clinical Investigation  Journal

abstract

  • HDL is a major atheroprotective factor, but the mechanisms underlying this effect are still obscure. HDL binding to scavenger receptor-BI has been shown to activate eNOS, although the responsible HDL entities and signaling pathways have remained enigmatic. Here we show that HDL stimulates NO release in human endothelial cells and induces vasodilation in isolated aortae via intracellular Ca2+ mobilization and Akt-mediated eNOS phosphorylation. The vasoactive effects of HDL could be mimicked by three lysophospholipids present in HDL: sphingosylphosphorylcholine (SPC), sphingosine-1-phosphate (S1P), and lysosulfatide (LSF). All three elevated intracellular Ca2+ concentration and activated Akt and eNOS, which resulted in NO release and vasodilation. Deficiency of the lysophospholipid receptor S1P3 (also known as LPB3 and EDG3) abolished the vasodilatory effects of SPC, S1P, and LSF and reduced the effect of HDL by approximately 60%. In endothelial cells from S1P3-deficient mice, Akt phosphorylation and Ca2+ increase in response to HDL and lysophospholipids were severely reduced. In vivo, intra-arterial administration of HDL or lysophospholipids lowered mean arterial blood pressure in rats. In conclusion, we identify HDL as a carrier of bioactive lysophospholipids that regulate vascular tone via S1P3-mediated NO release. This mechanism may contribute to the vasoactive effect of HDL and represent a novel aspect of its antiatherogenic function.

subject areas

  • Animals
  • Aorta
  • Calcium
  • Cells, Cultured
  • Endothelium, Vascular
  • Enzyme Activation
  • Enzyme Inhibitors
  • Female
  • Humans
  • In Vitro Techniques
  • Lipoproteins, HDL
  • Lysophospholipids
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Mice, Knockout
  • Nitric Oxide
  • Nitric Oxide Synthase
  • Nitric Oxide Synthase Type II
  • Nitric Oxide Synthase Type III
  • Phosphorylation
  • Protein Serine-Threonine Kinases
  • Proto-Oncogene Proteins
  • Proto-Oncogene Proteins c-akt
  • Rats
  • Rats, Inbred WKY
  • Rats, Wistar
  • Receptors, G-Protein-Coupled
  • Receptors, Lysophospholipid
  • Vasodilation
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Identity

International Standard Serial Number (ISSN)

  • 0021-9738

Digital Object Identifier (DOI)

  • 10.1172/jci200418004

PubMed ID

  • 14966566
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Additional Document Info

start page

  • 569

end page

  • 581

volume

  • 113

issue

  • 4

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