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Vascular effects of sphingolipids.

Martin C Michel1, Arthur C M Mulders, Maikel Jongsma

  • 1Department of Pharmacology & Pharmacotherapy, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands. m.c.michel@amc.uva.nl

Acta Paediatrica (Oslo, Norway : 1992)
|March 30, 2007
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Sphingomyelin metabolites like ceramide, sphingosine 1-phosphate (S1P), and sphingosylphosphorylcholine (SPC) significantly influence vascular tone. These compounds, acting both internally and externally, offer potential therapeutic targets for vascular diseases.

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Area of Science:

  • Biochemistry
  • Vascular Biology
  • Pharmacology

Background:

  • Sphingomyelin metabolites, including ceramide, sphingosine 1-phosphate (S1P), and sphingosylphosphorylcholine (SPC), are increasingly recognized for their roles in regulating vascular tone.
  • While ceramide primarily acts intracellularly, S1P and SPC are known to interact with specific receptors, though SPC receptors are not fully characterized.
  • These metabolites can induce opposing effects on vascular tone, such as vasoconstriction and vasodilation.

Purpose of the Study:

  • To investigate the multifaceted roles of sphingomyelin metabolites in modulating vascular tone.
  • To explore the mechanisms underlying their effects, including receptor-mediated actions and intracellular signaling.
  • To understand the contribution of locally formed metabolites versus circulating ones in vascular regulation.

Main Methods:

  • Analysis of sphingomyelin metabolite effects (ceramide, S1P, SPC) on vascular tone.
  • Investigation of receptor involvement and intracellular signaling pathways.
  • Examination of local metabolite formation within vessel walls stimulated by vasoactive agents like angiotensin II.

Main Results:

  • Sphingomyelin metabolites exhibit complex modulatory effects on vascular tone, capable of causing both constriction and dilation.
  • Differential effects are observed, with ceramide sometimes opposing the actions of S1P and SPC.
  • Vascular tone modulation involves both endothelial and smooth muscle cells, influenced by S1P receptor expression patterns.
  • Local synthesis of sphingomyelin metabolites within the vessel wall, triggered by agents like angiotensin II, suggests an intrinsic signaling role.

Conclusions:

  • Sphingomyelin metabolites are critical endogenous regulators of vascular function.
  • Dysregulation of these metabolites may contribute to the pathology of various diseases.
  • Targeting sphingomyelin metabolite pathways presents a promising therapeutic strategy for vascular conditions.