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Proteases and cell-mediated cytotoxicity

A J Darmon1, R C Bleackley

  • 1Ludwig Institute for Cancer Research, London, UK.

Critical Reviews in Immunology
|June 24, 1998
PubMed
Summary
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Cytotoxic lymphocytes induce target cell death via granule release or receptor signaling, triggering apoptosis. This review explores the role of caspases, key proteases, in initiating this programmed cell death.

Area of Science:

  • Immunology
  • Cell Biology
  • Biochemistry

Background:

  • Cytotoxic T lymphocytes (CTLs) and natural killer (NK) cells are crucial for eliminating viral-infected and cancerous cells.
  • Two primary mechanisms mediate target cell death: granule-mediated exocytosis and receptor-ligand interactions.

Purpose of the Study:

  • To review the role of caspases in apoptosis induced by cytotoxic cells.
  • To connect protease activity to cell-mediated cytotoxicity.

Main Methods:

  • Literature review of studies investigating cytotoxic cell mechanisms and apoptosis.
  • Analysis of research linking caspases to cytotoxic cell-induced target cell death.

Main Results:

  • Cytotoxic cell-mediated killing involves distinct pathways leading to apoptosis.

Related Experiment Videos

  • Caspases, a family of cysteine proteases, are identified as key initiators of apoptosis.
  • Both granule-mediated and receptor-mediated cytotoxicity converge on apoptotic pathways involving caspases.

    • Conclusions:

    • Caspases play a central role in the execution of apoptosis following cytotoxic cell attack.
    • Understanding caspase involvement deepens insights into immune surveillance and cancer cell elimination.