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Beyond apoptosis: nonapoptotic cell death in physiology and disease

Claudio A Hetz1, Vicente Torres, Andrew F G Quest

  • 1Instituto de Ciencias Biomédicas, Universidad de Chile, Santiago, Chile.

Biochemistry and Cell Biology = Biochimie Et Biologie Cellulaire
|October 20, 2005
PubMed

Insights

Programmed cell death (PCD) involves more than just apoptosis. Research shows that canonical apoptotic pathways can also regulate caspase-dependent and -independent cell death mechanisms.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Immunology

Background:

  • Apoptosis, a form of programmed cell death (PCD), is caspase-mediated.
  • Caspase-dependent signaling pathways are linked to nonapoptotic cell death in lymphocytes.
  • Cells exhibit diverse death responses, including necrosis-like PCD, autophagy, and accidental necrosis.

Purpose of the Study:

  • To review recent data on programmed cell death (PCD) mechanisms.
  • To explore the role of canonical apoptotic pathways in regulating diverse cell death pathways.
  • To highlight the flexibility of cellular death responses.

Main Methods:

  • Literature review of recent studies on programmed cell death.
  • Analysis of death-receptor signaling in lymphocytes.
  • Discussion of caspase-dependent and -independent cell death pathways.

Main Results:

  • Apoptosis is not the sole form of PCD.
  • Canonical apoptotic pathways, including death-receptor signaling, influence both caspase-dependent and -independent cell death.
  • Cellular death responses are highly flexible, encompassing various PCD types.

Conclusions:

  • Programmed cell death encompasses diverse mechanisms beyond apoptosis.
  • Apoptotic signaling pathways play a regulatory role in multiple cell death modalities.
  • Understanding these pathways is crucial for comprehending cellular fate under physiological and pathological conditions.

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