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Alternative activation of macrophages: mechanism and functions

Siamon Gordon1, Fernando O Martinez

  • 1Sir William Dunn School of Pathology, University of Oxford, South Parks Road, Oxford OX1 3RE, UK. siamon.gordon@path.ox.ac.uk

Immunity
|June 1, 2010
PubMed

Insights

Alternatively activated macrophages, driven by T helper 2 (Th2) cell cytokines like interleukin-4 (IL-4) and IL-13, play a crucial role in immune responses. Further research is needed to fully understand their function in health and disease.

Area of Science:

  • Immunology
  • Cell Biology

Background:

  • Macrophage activation is central to immune responses.
  • An alternative activation pathway is increasingly recognized for its significance in homeostasis and disease.

Purpose of the Study:

  • To review recent research on alternatively activated macrophages.
  • To propose a restricted definition for this macrophage subset.
  • To explore the mechanisms of T helper 2 (Th2) cell cytokine-mediated effects on macrophages.

Main Methods:

  • Literature review and synthesis of current research.
  • Analysis of T helper 2 (Th2) cell cytokine pathways, specifically interleukin-4 (IL-4) and IL-13.
  • Exploration of macrophage biosynthesis and responses in various microenvironments.

Main Results:

  • Growing interest in the definition, mechanism, and functional significance of alternatively activated macrophages.
  • Evidence supporting a specific role for T helper 2 (Th2) cell cytokines in modulating macrophage functions.
  • Insights into how alternatively activated macrophages respond to normal and pathological conditions.

Conclusions:

  • A precise definition of alternatively activated macrophages is essential.
  • Interleukin-4 (IL-4) and IL-13 are key mediators in alternative macrophage activation.
  • Further investigation into alternatively activated macrophages is crucial for understanding immunobiology and disease.

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