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The dependence receptor hypothesis.

P Mehlen1, D E Bredesen

  • 1Apoptosis/Differentiation Laboratory, Equipe labelisée 'La Ligue', Molecular and Cellular Genetic Center, CNRS UMR 5534, University of Lyon, 69622 Villeurbanne, France. mehlen@univ-lyon1.fr

Apoptosis : an International Journal on Programmed Cell Death
|January 24, 2004
PubMed
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Dependence receptors trigger cell survival with ligands but initiate programmed cell death without them. This review explores their role in nervous system development and cancer.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Neuroscience

Background:

  • A novel class of functionally related proteins, termed dependence receptors, has been identified.
  • These receptors signal for cell survival or death based on ligand presence.
  • Cells expressing dependence receptors exhibit ligand-dependent survival.

Purpose of the Study:

  • To review current knowledge on dependence receptors.
  • To elucidate shared mechanisms of cell death induction.
  • To discuss their roles in nervous system development and tumorigenesis.

Main Methods:

  • Literature review of dependence receptor research.
  • Analysis of signaling pathways involved in ligand withdrawal-induced cell death.
  • Examination of the role of caspases in dependence receptor signaling.

Related Experiment Videos

Main Results:

  • Dependence receptors transduce distinct signals: survival/differentiation/migration with ligand, and programmed cell death without ligand.
  • Ligand withdrawal triggers cell death, often involving caspase interactions and cleavage.
  • The precise signaling pathways for cell death induction remain largely uncharacterized.

Conclusions:

  • Dependence receptors represent a unique class of signaling proteins.
  • Their dual signaling capacity is critical for cellular homeostasis.
  • Further research is needed to fully understand their mechanisms and therapeutic potential in development and disease.