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Interleukin-10 inhibits B7 and intercellular adhesion molecule-1 expression on human monocytes

F Willems1, A Marchant, J P Delville

  • 1Department of Immunology, Hôpital Erasme, Université Libre de Bruxelles, Belgium.

European Journal of Immunology
|April 1, 1994
PubMed

Insights

Interleukin-10 (IL-10) suppresses T cell activation by reducing key adhesion molecules. This cytokine inhibits intercellular adhesion molecule 1 (ICAM-1) and B7 expression on monocytes, contributing to its immunosuppressive effects.

Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • Interleukin-10 (IL-10) is known to inhibit T cell activation.
  • The mechanism may involve interference with antigen-presenting cell costimulatory properties.

Purpose of the Study:

  • To investigate if IL-10 modulates accessory molecule expression on human monocytes.
  • To determine the effect of IL-10 on intercellular adhesion molecule 1 (ICAM-1) and B7 expression.

Main Methods:

  • Flow cytometry was used to analyze monocyte surface molecule expression.
  • Human monocytes were treated with IL-10 and/or interferon gamma (IFN-gamma).

Main Results:

  • IL-10 inhibited basal ICAM-1 expression on monocytes.
  • IL-10 reduced IFN-gamma-induced upregulation of ICAM-1 and B7.
  • These inhibitory effects were dose-dependent.

Conclusions:

  • IL-10 decreases ICAM-1 and B7 expression on monocytes.
  • This modulation of accessory molecules likely contributes to IL-10's immunosuppressive properties.

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