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Human dendritic cell responses to lipopolysaccharide and CD40 ligation are differentially regulated by interleukin-10

C Buelens1, V Verhasselt, D De Groote

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

European Journal of Immunology
|August 1, 1997
PubMed

Insights

Interleukin-10 (IL-10) differentially affects dendritic cell (DC) maturation. IL-10 inhibits lipopolysaccharide (LPS)-induced maturation markers and cytokines but not CD40-induced maturation, except for IL-12 production.

Area of Science:

  • Immunology
  • Cell Biology

Background:

  • Dendritic cells (DCs) are crucial for initiating immune responses.
  • DC maturation is a complex process involving surface marker expression and cytokine production.
  • Interleukin-10 (IL-10) is a key immunomodulatory cytokine.

Purpose of the Study:

  • To investigate the differential effects of IL-10 on human DC maturation induced by distinct stimuli.
  • To compare IL-10's impact on lipopolysaccharide (LPS)-induced versus CD40 ligand-induced DC maturation pathways.

Main Methods:

  • Human DCs were generated from peripheral blood mononuclear cells.
  • DCs were matured using either LPS or CD40 ligand stimulation in the presence or absence of IL-10.
  • Maturation was assessed by measuring surface marker expression (CD83, CD86) and cytokine production (IL-8, TNF-α, IL-12).

Main Results:

  • IL-10 inhibited LPS-induced CD83 and CD86 expression on DCs.
  • IL-10 suppressed LPS-induced IL-8 and TNF-α production.
  • IL-10 inhibited IL-12 production irrespective of the maturation stimulus (LPS or CD40).
  • IL-10 did not inhibit CD40-induced CD83 and CD86 expression.

Conclusions:

  • IL-10 differentially regulates LPS-dependent and CD40-dependent DC maturation pathways.
  • The findings highlight distinct mechanisms controlling DC maturation based on the activating signal.
  • IL-10's selective inhibition provides insights into immune response modulation.

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