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Area of Science:

  • Immunology
  • Cytokine Biology
  • Translational Medicine

Background:

  • Interferon-gamma (IFNγ) is a key cytokine involved in immune responses.
  • Overproduction of IFNγ is implicated in severe hyperinflammatory and immune-mediated diseases.
  • IFNγ influences B cells and T follicular helper cells, suggesting a role in systemic lupus erythematosus.

Purpose of the Study:

  • To explore the role of IFNγ in human diseases.
  • To identify and study IFNγ-related biomarkers for managing hyperinflammatory conditions.
  • To assess the clinical utility of biomarkers like CXCL9 in reflecting IFNγ activity.

Main Methods:

  • Review of animal models and translational research in patients.
  • Identification and study of IFNγ-related biomarkers (e.g., phosphorylated STAT1, neopterin, CXCL9).
  • Evaluation of IFNγ-neutralizing agents in clinical trials for hyperinflammatory diseases.

Main Results:

  • IFNγ plays a role in primary and secondary haemophagocytic lymphohistiocytosis, macrophage activation syndrome, and cytokine release syndrome.
  • IFNγ-neutralizing agents demonstrate efficacy in treating primary haemophagocytic lymphohistiocytosis.
  • Circulating CXCL9 levels are emerging as a reliable biomarker for IFNγ production in clinical practice.

Conclusions:

  • IFNγ is a critical factor in various hyperinflammatory diseases.
  • Biomarkers such as CXCL9 are valuable for assessing IFNγ activity and guiding treatment.
  • Targeting IFNγ shows therapeutic potential for severe inflammatory conditions.