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Area of Science:

  • Immunology
  • Cytokine Biology
  • Inflammation Research

Background:

  • Interleukin-1 (IL-1) comprises IL-1α and IL-1β, crucial cytokines in innate immunity, discovered ~35 years ago.
  • The IL-1 family has 11 members, including activating cytokines and an IL-1 receptor antagonist.
  • IL-1 activation involves caspase-1 dependent inflammasome assembly and caspase-1 independent neutrophil proteases.

Purpose of the Study:

  • To review the role of Interleukin-1 (IL-1) in innate immunity, inflammation, and disease.
  • To discuss the mechanisms of IL-1 processing and activation.
  • To highlight the therapeutic potential of IL-1 inhibitors.

Main Methods:

  • Review of existing literature on IL-1 biology and function.
  • Analysis of IL-1's role in local and systemic inflammatory responses.
  • Examination of IL-1's involvement in inflammatory diseases and atherogenesis.

Main Results:

  • IL-1α and IL-1β are potent proinflammatory cytokines mediating vasodilatation, leukocyte recruitment, and tissue damage.
  • IL-1 influences cartilage and bone homeostasis and induces systemic effects like fever and hyperalgesia.
  • Dysregulated IL-1 activation is implicated in inflammatory diseases such as gout and potentially atherogenesis.

Conclusions:

  • IL-1 plays a central role in inflammatory processes and various human diseases.
  • Four IL-1 inhibitors are available or in development, demonstrating therapeutic efficacy.
  • IL-1 inhibitors have significantly advanced the understanding of IL-1's role in human pathology.