Reference : Prostaglandin D2 affects the differentiation and functions of human dendritic cells: ...
Scientific journals : Article
Human health sciences : Laboratory medicine & medical technology
Prostaglandin D2 affects the differentiation and functions of human dendritic cells: impact on the T cell response.
Gosset, Philippe [> > > >]
Pichavant, Muriel [> > > >]
Faveeuw, Christelle [> > > >]
Bureau, Fabrice mailto [Université de Liège - ULiège > Département de sciences fonctionnelles > GIGA-R : Biochimie et biologie moléculaire >]
Tonnel, Andre-Bernard [> > > >]
Trottein, Francois [> > > >]
European Journal of Immunology
VCH Verlagsgesellschaft
Yes (verified by ORBi)
[en] Dendritic cell ; Lipid mediator ; Antigen presentation/processing ; Costimulation ; Allergy
[en] The local environment in which dendritic cells (DC) differentiate is important for the acquisition of their immunostimulatory properties. Since prostaglandin D(2) (PGD(2)), a major prostanoid produced during inflammatory reactions, is involved in the control of immune responses, its effect on the differentiation and functions of human monocyte-derived dendritic cells (MDDC) was studied. We show that DC differentiated in the presence of PGD(2) (PG/DC) have an unusual phenotype, with modifications in the expression of molecules involved in antigen (Ag) capture and presentation, leading to higher endocytic and Ag-processing activities. However, under conditions that necessitated Ag processing and presentation, PG/DC have an impaired ability to stimulate naive T cells, whereas superAg-pulsed DC efficiently promote their proliferation. Upon lipopolysaccharide or TNF-alpha/IL-1beta stimulation, PG/DC phenotypically mature but produce abnormal amounts of immunoregulatory cytokines (decreased IL-12p70/IL-10 ratio). Moreover, mature PG/DC fail to up-regulate the chemokine receptor CCR7 and show an impaired migration towards its ligand CCL19. Finally, PG/DC favor the differentiation of naive T cells toward Th2 cells, an effect dependent on IL-10 and inducible costimulator ligand expression by DC. Most of the herein described effects of PGD(2) on MDDC can be reproduced, usually with a higher efficacy, with a selective D prostanoid receptor (DP)1, but not DP2, agonist. Taken as a whole, these results demonstrate that PGD(2) impacts DC differentiation and functions, and extend the concept that it exerts important roles in immunity
Researchers ; Professionals

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