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RESEARCH PRODUCT
The aryl hydrocarbon receptor modulates acute and late mast cell responses.
Claudio TripodoMarco CalvarusoMario P. ColomboBarbara FrossiRiccardo SibilanoGiorgia GriElena BettoCarlo PucilloLuca DanelliAlessandra Dall’agnesesubject
Time FactorsInbred C57BLLigandsCell DegranulationPathogenesischemistry.chemical_compoundMiceAnaphylaxiReceptorsMast CellImmunology and AllergyMast CellsReceptorMice KnockoutbiologyInterleukin-17DegranulationMast cellUp-RegulationImmunology Mast Cell Aryl Receptormedicine.anatomical_structureAryl HydrocarbonBone Marrow Celldeficiency/metabolism/physiologyIgEmedicine.symptomimmunology/metabolism/pathologyHistamineHumanReceptorTime FactorKnockoutImmunologyDown-RegulationLigandInflammationBone Marrow CellsSettore MED/08 - Anatomia PatologicaCell LinebiosynthesiAnaphylaxis; immunology/metabolism/pathology Animals Bone Marrow Cells; immunology/metabolism/pathology Cell Degranulation; genetics/immunology Cell Line Down-Regulation; genetics/immunology Humans Interleukin-17; biosynthesis Interleukin-6; biosynthesis Ligands Mast Cells; immunology/metabolism/pathology Mice Mice; Inbred C57BL Mice; Knockout Receptors; Aryl Hydrocarbon; deficiency/metabolism/physiology Receptors; IgE; physiology Time Factors Up-Regulation; genetics/immunologymedicineAnimalsHumansTranscription factorAnaphylaxisAnimalInterleukin-6Receptors IgEAryl hydrocarbon receptorgenetics/immunologyMice Inbred C57BLMAST CELL; ARYL HYDROCARBON RECEPTORchemistryReceptors Aryl HydrocarbonImmunologyphysiologybiology.proteinbiosynthesisdescription
Abstract The aryl hydrocarbon receptor (AhR) is a ligand-dependent transcription factor whose activity is modulated by xenobiotics as well as physiological ligands. These compounds may modulate inflammatory responses and contribute to the rising prevalence of allergic diseases observed in industrialized countries. Mast cells (MCs), located within tissues at the boundary of the external environment, represent a potential target of AhR ligands. In this study, we report that murine and human MCs constitutively express AhR, and its activation by the high-affinity ligand 6-formylindolo[3,2-b]carbazole (FICZ) determines a boost in degranulation. On the contrary, repeated exposure to FICZ inhibits MC degranulation. Accordingly, histamine release, in an in vivo passive systemic anaphylactic model, is exacerbated by a single dose and is attenuated by repetitive stimulation of AhR. FICZ-exposed MCs produce reactive oxygen species and IL-6 in response to cAMP-dependent signals. Moreover, AhR-activated MCs produce IL-17, a critical player in chronic inflammation and autoimmunity, suggesting a novel pathway for MC activation in the pathogenesis of these diseases. Indeed, histological analysis of patients with chronic obstructive pulmonary disease revealed an enrichment in AhR/IL-6 and AhR/IL-17 double-positive MCs within bronchial lamina propria. Thus, tissue-resident MCs could translate external chemical challenges through AhR by modulating allergic responses and contributing to the generation of inflammation-related diseases.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-07-01 | Journal of immunology (Baltimore, Md. : 1950) |