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RESEARCH PRODUCT
Mast cells counteract regulatory T-cell suppression through interleukin-6 and OX40/OX40L axis toward Th17-cell differentiation
Claudio TripodoCarlo PucilloRosetta PedottiAndrea GorzanelliMario P. ColomboBarbara FrossiSilvia PiconeseGiorgia GriSilvia Musiosubject
Regulatory T cellmedicine.medical_treatmentCellular differentiationImmunologyPriming (immunology)chemical and pharmacologic phenomenaMice TransgenicMast cell; T regulatory cell; Immune responseBiologyLymphocyte ActivationT-Lymphocytes RegulatoryBiochemistryImmune toleranceMiceMice CongenicmedicineImmune ToleranceMast CellT regulatory cellImmune responseCells CulturedCell ProliferationAnimalInterleukin-6Experimental autoimmune encephalomyelitisInterleukin-17hemic and immune systemsCell DifferentiationT lymphocyteT-Lymphocytes Helper-InducerHematologyCell BiologyReceptors OX40medicine.diseaseCell biologyMice Inbred C57BLmedicine.anatomical_structureCytokineImmunologyAnimals; Cell Differentiation; Cell Proliferation; Cells Cultured; Immune Tolerance; Interleukin-17; Interleukin-6; Lymphocyte Activation; Mast Cells; Membrane Glycoproteins; Mice; Mice Congenic; Mice Inbred C57BL; Mice Transgenic; Receptors OX40; Signal Transduction; T-Lymphocytes Helper-Inducer; T-Lymphocytes Regulatory; Tumor Necrosis Factors; Hematology; Biochemistry; Cell Biology; ImmunologyInterleukin 17Membrane GlycoproteinTumor Necrosis FactorSignal Transductiondescription
Abstract The development of inflammatory diseases implies inactivation of regulatory T (Treg) cells through mechanisms that still are largely unknown. Here we showed that mast cells (MCs), an early source of inflammatory mediators, are able to counteract Treg inhibition over effector T cells. To gain insight into the molecules involved in their interplay, we set up an in vitro system in which all 3 cellular components were put in contact. Reversal of Treg suppression required T cell–derived interleukin-6 (IL-6) and the OX40/OX40L axis. In the presence of activated MCs, concomitant abundance of IL-6 and paucity of Th1/Th2 cytokines skewed Tregs and effector T cells into IL-17–producing T cells (Th17). In vivo analysis of lymph nodes hosting T-cell priming in experimental autoimmune encephalomyelitis revealed activated MCs, Tregs, and Th17 cells displaying tight spatial interactions, further supporting the occurrence of an MC-mediated inhibition of Treg suppression in the establishment of Th17-mediated inflammatory responses.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-09-24 |