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Function and clinical use of interleukin-12

G Trinchieri1

  • 1Wistar Institute of Anatomy and Biology, Philadelphia, PA 19104, USA.

Current Opinion in Hematology
|January 1, 1997
PubMed
Summary

Interleukin-12 (IL-12) is a key cytokine produced by immune cells that fights infections and cancer. It promotes T-helper type-1 responses, aiding in resistance to pathogens and potentially treating autoimmune diseases and tumors.

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Area of Science:

  • Immunology
  • Cytokine Biology
  • Infectious Disease Research

Background:

  • Interleukin-12 (IL-12) is a cytokine produced by various immune cells, including phagocytes and antigen-presenting cells.
  • IL-12 production is triggered by microbial components via T-cell-dependent or independent pathways.
  • It rapidly induces interferon-gamma production, activating immune cells and promoting inflammation.

Purpose of the Study:

  • To elucidate the role of Interleukin-12 in immune responses.
  • To understand its regulatory mechanisms and impact on T-cell differentiation.
  • To explore its therapeutic potential in infectious diseases, autoimmune disorders, and cancer.

Main Methods:

  • The study reviews the production pathways and regulatory feedback of IL-12.
  • It analyzes the effects of IL-12 on T-helper cell differentiation (Th1 vs. Th2).
  • It discusses the implications of IL-12 in various disease contexts and clinical trials.

Main Results:

  • IL-12 promotes T-helper type-1 (Th1) cell generation while inhibiting T-helper type-2 (Th2) cells.
  • This Th1-biased response enhances resistance to intracellular pathogens, fungi, and certain viruses.
  • IL-12 plays a role in the immunopathology of autoimmune diseases and suppresses allergic reactions.

Conclusions:

  • Interleukin-12 is a critical immunoregulatory cytokine promoting Th1 responses and pathogen resistance.
  • Dysregulation of IL-12 is implicated in autoimmune diseases and immunodeficiency.
  • IL-12 shows therapeutic promise for cancer, HIV, and other diseases due to its immune-enhancing and anti-tumor effects.

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