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Evaluation of Caspase Activation to Assess Innate Immune Cell Death
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Caspase recruitment domain-containing protein 9 signaling in innate immunity and inflammation

Susanne Roth1, Jürgen Ruland

  • 1Institut für Klinische Chemie und Pathobiochemie, Klinikum rechts der Isar, Technische Universität München, 81675 Munich, Germany.

Trends in Immunology
|March 26, 2013
PubMed

Insights

Caspase recruitment domain-containing protein 9 (Card9) is crucial for innate immunity, linking pattern recognition receptors to inflammatory pathways. Its dysfunction is linked to inflammatory diseases, highlighting its therapeutic potential.

Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Signaling

Background:

  • Caspase recruitment domain-containing protein 9 (Card9) is a key adapter protein in innate immunity.
  • Card9 forms signaling complexes with Bcl10 and Malt1, linking C-type lectin receptors and intracellular sensors to inflammatory responses.
  • Card9 signaling is vital for recognizing fungal, bacterial, and viral pathogens, ensuring host protection.

Purpose of the Study:

  • To review the molecular regulation and physiological functions of Card9 in host defense and immune homeostasis.
  • To discuss the role of Card9 in inflammatory diseases.
  • To provide a framework for therapeutic targeting of Card9 signaling in immune-mediated diseases.

Main Methods:

  • Literature review and synthesis of existing research on Card9 function.
  • Analysis of Card9's role in innate immune signaling pathways.
  • Examination of Card9 polymorphisms and their association with human diseases.

Main Results:

  • Card9 is essential for assembling signaling complexes that mediate inflammatory responses.
  • Card9 integrates signals from various pattern recognition receptors, including C-type lectin receptors, RLRs, and Nod2.
  • Card9 polymorphisms are frequently linked to inflammatory conditions, underscoring its clinical relevance.

Conclusions:

  • Card9 plays a critical role in host defense against microbial infections and maintaining immune homeostasis.
  • Dysregulation of Card9 signaling contributes to inflammatory diseases.
  • Card9 represents a promising therapeutic target for immune-mediated diseases.

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