title: Cutting edge: human CD4+CD25+ T cells restrain the maturation and antigen-presenting function of dendritic cells.
abstract: The characteristics and functions of CD4(+)CD25(+) regulatory cells have been well defined in murine and human systems. However, the interaction between CD4(+)CD25(+) T cells and dendritic cells (DC) remains unclear. In this study, we examined the effect of human CD4(+)CD25(+) T cells on maturation and function of monocyte-derived DC. We show that regulatory T cells render the DC inefficient as APCs despite prestimulation with CD40 ligand. This effect was marginally reverted by neutralizing Abs to TGF-beta. There was an increased IL-10 secretion and reduced expression of costimulatory molecules in DC. Thus, in addition to direct suppressor effect on CD4(+) T cells, regulatory T cells may modulate the immune response through DC.
authors.affiliation: Institut National de la Santé et de la Recherche Médicale, Unité 430, and Université Pierre et Marie Curie, Centre de Recherches Biomedicales des Cordeliers, Paris, France.
authors.forename: Namita
authors.initials: N
authors.lastname: Misra
authors.forename: Jagadeesh
authors.initials: J
authors.lastname: Bayry
authors.forename: Sébastien
authors.initials: S
authors.lastname: Lacroix-Desmazes
authors.forename: Michel D
authors.initials: MD
authors.lastname: Kazatchkine
authors.forename: Srini V
authors.initials: SV
authors.lastname: Kaveri
mesh_terms: D017951:Antigen Presentation / Q000276:immunology*; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology* / Q000378:metabolism*; D002454:Cell Differentiation / Q000276:immunology; D002478:Cells, Cultured; D018920:Coculture Techniques; D003713:Dendritic Cells / Q000166:cytology / Q000276:immunology* / Q000378:metabolism*; D005434:Flow Cytometry; D006801:Humans; D007165:Immunosuppression Therapy; D008213:Lymphocyte Activation; D007959:Lymphocyte Culture Test, Mixed; D009000:Monocytes / Q000166:cytology / Q000276:immunology / Q000378:metabolism; D015375:Receptors, Interleukin-2 / Q000096:biosynthesis*; D016176:T-Lymphocyte Subsets / Q000276:immunology* / Q000378:metabolism*
chemical_list: D015375:Receptors, Interleukin-2