CD40 signalling induces IL-10-producing, tolerogenic dendritic cells

Abstract: Dendritic cells (DC) are potent antigen-presenting cells capable to induce efficient antigen-specific T cell responses in vitro and in vivo. Herein, the maturation process is of great significance, as immature DC (iDC) are known to induce rather regulatory than effector T cell differentiat...

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Hauptverfasser: Tüttenberg, Andrea (VerfasserIn) , Fondel, Sabine (VerfasserIn) , Steinbrink, Kerstin (VerfasserIn) , Enk, Alexander (VerfasserIn) , Jonuleit, Helmut (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 2010
In: Experimental dermatology
Year: 2010, Jahrgang: 19, Heft: 1, Pages: 44-53
ISSN:1600-0625
DOI:10.1111/j.1600-0625.2009.00975.x
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1111/j.1600-0625.2009.00975.x
Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1600-0625.2009.00975.x
Volltext
Verfasserangaben:Andrea Tuettenberg, Sabine Fondel, Kerstin Steinbrink, Alexander H. Enk and Helmut Jonuleit

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520 |a Abstract: Dendritic cells (DC) are potent antigen-presenting cells capable to induce efficient antigen-specific T cell responses in vitro and in vivo. Herein, the maturation process is of great significance, as immature DC (iDC) are known to induce rather regulatory than effector T cell differentiation. This study was designed to characterize the role of the CD40-CD40L pathway for differentiation and function of human DC. Therefore, iDC were stimulated through CD40-CD40L interaction by transduction of DC with adenoviral vectors encoding for CD40L (Ad-CD40L). Resulting DC (CD40L-DC) were analysed concerning their phenotype, cytokine profile and T cell stimulatory capacity. Transduction induced a DC phenotype comparable to stimulation with proinflammatory cytokines as revealed by upregulation of CD83 and the costimulatory molecules CD80 and CD86. Additionally, Ad-CD40L-induced strong production of IL-12p70 not observed in cytokine-matured DC. Surprisingly, the T cell stimulatory capacity was markedly reduced in CD40L-DC. Furthermore, stimulation of CD8+ T cells by peptide-loaded CD40L-DC resulted in a substantial reduction of antigen-specific IFN-γ production. This phenomenon is due to an enhanced IL-10 production of CD40L-DC in DC-T cell coculture as well as a stabilization of the IL-10 receptor expression on activated T cells. These data demonstrate that DC stimulated through CD40-CD40L interaction differentiate into tolerogenic DC with immunomodulatory function. 
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