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Caspase-8: fly or die

Steven M Frisch1

  • 1West Virginia University, Mary Babb Randolph Cancer Center, Morgantown, West Virginia, USA. sfrisch@hsc.wvu.edu

Cancer Research
|June 19, 2008
PubMed

Insights

Procaspase-8 regulates cell adhesion and migration by interacting with Src kinase. This interaction prevents apoptosis, offering potential cancer therapy targets.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Cancer Research

Background:

  • Procaspase-8 plays a role in cell adhesion and motility.
  • Src phosphorylation influences procaspase-8's function.

Purpose of the Study:

  • To survey recent findings on procaspase-8's function in cell adhesion and motility.
  • To discuss the mechanism of Src phosphorylation in regulating procaspase-8.
  • To explore the implications for cancer prognosis and therapy.

Main Methods:

  • Literature review of recent studies on procaspase-8.
  • Analysis of molecular interactions involving procaspase-8, Src, p85alpha, Rac, and ERK.
  • Discussion of signaling pathways including PI3K and calpain activation.

Main Results:

  • Procaspase-8 acts as an adhesion/migration factor, while mature caspase-8 induces apoptosis.
  • Src phosphorylation prevents procaspase-8 conversion to mature caspase-8, thus controlling its function.
  • Procaspase-8 modulates Rac and ERK signaling and promotes calpain activation during migration.

Conclusions:

  • Src-mediated phosphorylation of procaspase-8 provides a switch between cell migration and apoptosis.
  • Understanding this mechanism may lead to novel cancer therapeutic strategies targeting cell adhesion and motility.

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