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Neutral sphingomyelinase

S Chatterjee1

  • 1Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205.

Advances in Lipid Research
|January 1, 1993
PubMed
Summary
This summary is machine-generated.

Neutral sphingomyelinase (N-SMase) activation by biomodulators initiates cell signaling pathways. This enzyme influences cholesterol metabolism and LDL uptake, impacting cellular functions like proliferation and differentiation.

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Area of Science:

  • Cell Biology
  • Biochemistry
  • Signal Transduction

Background:

  • Neutral sphingomyelinase (N-SMase) is implicated in cellular processes.
  • Biomodulators interact with cell surface receptors to influence N-SMase activity.

Purpose of the Study:

  • To elucidate the role of N-SMase in cell signaling and cholesterol metabolism.
  • To propose a hypothetical model for N-SMase function in response to biomodulators.

Main Methods:

  • The study proposes a hypothetical model based on existing evidence.
  • It discusses the interaction of biomodulators with N-SMase and its downstream effects.

Main Results:

  • N-SMase activation by biomodulators mobilizes intracellular cholesterol.

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  • Ceramide generation by N-SMase influences cell proliferation and differentiation.
  • N-SMase activity indirectly modulates cholesterol metabolism and LDL receptor activity.

    • Conclusions:

    • N-SMase plays a central role in signal transduction pathways.
    • N-SMase action is crucial for cellular functions through cholesterol mobilization and lipid generation.
    • N-SMase influences lipoprotein metabolism and foam cell formation in macrophages.