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Related Experiment Videos

Sphingosine-1-phosphate: dual messenger functions.

Shawn G Payne1, Sheldon Milstien, Sarah Spiegel

  • 1Laboratory of Cellular and Molecular Regulation, National Institute of Mental Health, Bethesda, MD 20892, USA.

FEBS Letters
|October 29, 2002
PubMed
Summary

Sphingosine-1-phosphate (S1P), a lipid mediator, regulates cellular functions via cell surface receptors and intracellular pathways. The balance of S1P with other sphingolipids determines cell fate.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Lipid Metabolism

Background:

  • Sphingosine-1-phosphate (S1P) is a crucial serum-borne lipid mediator.
  • S1P exerts its functions by binding to five specific G protein-coupled receptors.
  • Intracellular roles of S1P are less understood but implicated in calcium mobilization, cell growth, and apoptosis suppression.

Purpose of the Study:

  • To elucidate the intracellular functions of sphingosine-1-phosphate (S1P).
  • To identify intracellular targets of S1P.
  • To understand the role of S1P in regulating cell fate in conjunction with ceramide and sphingosine.

Main Methods:

  • The study likely involved biochemical assays and cell-based experiments to investigate S1P's intracellular actions.
  • Methods may include analyzing calcium mobilization, cell proliferation, and apoptosis.

Related Experiment Videos

  • Investigating the interplay between S1P, ceramide, and sphingosine levels.

    • Main Results:

    • Evidence suggests S1P acts as an intracellular second messenger.
    • S1P influences calcium mobilization, cell growth, and apoptosis.
    • The balance between S1P, ceramide, and sphingosine is critical for determining cell fate.

    Conclusions:

    • S1P possesses both extracellular and intracellular functions.
    • Intracellular S1P signaling pathways require further investigation.
    • Maintaining the balance of sphingolipids is essential for cellular homeostasis and survival.