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Inflammatory Caspases: Toward a Unified Model for Caspase Activation by Inflammasomes

Connie Ross1,2, Amy H Chan1, Jessica B von Pein1

  • 1Institute for Molecular Bioscience and IMB Centre for Inflammation and Disease Research, The University of Queensland, St. Lucia, Australia;

Annual Review of Immunology
|January 26, 2022
PubMed

Insights

Inflammasomes activate inflammatory caspases, crucial for immune responses and cell death. Understanding their regulation offers new therapeutic strategies for inflammasome-driven diseases and infections.

Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • Inflammasomes are multiprotein complexes that initiate inflammatory processes.
  • Inflammatory caspases (caspase-1, -4, -5, -11) are key mediators activated by inflammasomes.
  • These caspases drive pyroptosis (lytic cell death) and release inflammatory cytokines.

Purpose of the Study:

  • To comprehensively review the regulatory mechanisms governing inflammatory caspase activity.
  • To elucidate the physiological importance of caspase activity kinetics and substrate selection.
  • To explore how inflammasome and cell type influence caspase-mediated inflammatory and pyroptotic pathways.

Main Methods:

  • Literature review of inflammasome and inflammatory caspase research.
  • Analysis of molecular mechanisms controlling caspase activation and deactivation.
  • Examination of factors influencing caspase substrate specificity and cellular outcomes.

Main Results:

  • Detailed overview of inflammatory caspase activation and inhibition pathways.
  • Discussion on the impact of caspase activity timing and substrate targeting.
  • Exploration of cell-specific and inflammasome-dependent modulation of inflammatory responses.

Conclusions:

  • Inflammatory caspase regulation is complex, involving activation, deactivation, kinetics, and substrate specificity.
  • Cellular context and inflammasome type significantly impact downstream inflammatory and pyroptotic programs.
  • Targeting inflammatory caspase regulation presents potential therapeutic avenues for infections and inflammasome-associated diseases.
Keywords:
ASCcaspase-1caspase-11inflammasomeprotease activationpyroptosis

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