Dataset Information

Intradermal administration of IL-33 induces allergic airway inflammation.

ABSTRACT: Approximately half of all atopic dermatitis (AD) patients subsequently develop asthma, particularly those with severe AD. This association, suggesting a role for AD as an entry point for subsequent allergic disease, is a phenomenon known as the "atopic march". While the underlying cause of the atopic march remains unknown, recent evidence suggests that epithelial cell (EC)-derived cytokines play a major role. We showed that mice exposed to antigen through the skin, in the presence of IL-33, developed antigen-specific airway inflammation when later challenged in the lung. IL-33 signaling was dispensable during effector/challenge phase. These data reveal critical roles for IL-33 in the "atopic march" and will offer a new therapeutic target in the treatment and prevention of allergic asthma.

SUBMITTER: Han H

PROVIDER: S-EPMC5431780 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature

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Intradermal administration of IL-33 induces allergic airway inflammation.

Han Hongwei H Ziegler Steven F SF

Scientific reports 20170510 1

Approximately half of all atopic dermatitis (AD) patients subsequently develop asthma, particularly those with severe AD. This association, suggesting a role for AD as an entry point for subsequent allergic disease, is a phenomenon known as the "atopic march". While the underlying cause of the atopic march remains unknown, recent evidence suggests that epithelial cell (EC)-derived cytokines play a major role. We showed that mice exposed to antigen through the skin, in the presence of IL-33, deve ...[more]

PMID: 28490737

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Project description:BACKGROUND:Serum IL-22 levels are increased in patients with atopic dermatitis, which commonly precedes asthma in the atopic march. Epicutaneous sensitization in mice results in TH2-dominated skin inflammation that mimics atopic dermatitis and sensitizes the airways for antigen challenge-induced allergic inflammation characterized by the presence of both eosinophils and neutrophils. Epicutaneous sensitization results in increased serum levels of IL-22. OBJECTIVE:We sought to determine the role of IL-22 in antigen-driven airway allergic inflammation after inhalation challenge in epicutaneously sensitized mice. METHODS:Wild-type (WT) and Il22-/- mice were sensitized epicutaneously or immunized intraperitoneally with ovalbumin (OVA) and challenged intranasally with antigen. OVA T-cell receptor-specific T cells were TH22 polarized in vitro. Airway inflammation, mRNA levels in the lungs, and airway hyperresponsiveness (AHR) were examined. RESULTS:Epicutaneous sensitization preferentially elicited an IL-22 response compared with intraperitoneal immunization. Intranasal challenge of mice epicutaneously sensitized with OVA elicited in the lungs Il22 mRNA expression, IL-22 production, and accumulation of CD3+CD4+IL-22+ T cells that coexpressed IL-17A and TNF-?. Epicutaneously sensitized Il22-/- mice exhibited diminished eosinophil and neutrophil airway infiltration and decreased AHR after intranasal OVA challenge. Production of IL-13, IL-17A, and TNF-? was normal, but IFN-? production was increased in lung cells from airway-challenged and epicutaneously sensitized Il22-/- mice. Intranasal instillation of IFN-?-neutralizing antibody partially reversed the defect in eosinophil recruitment. WT recipients of TH22-polarized WT, but not IL-22-deficient, T-cell receptor OVA-specific T cells, which secrete both IL-17A and TNF-?, had neutrophil-dominated airway inflammation and AHR on intranasal OVA challenge. Intranasal instillation of IL-22 with TNF-?, but not IL-17A, elicited neutrophil-dominated airway inflammation and AHR in WT mice, suggesting that loss of IL-22 synergy with TNF-? contributed to defective recruitment of neutrophils into the airways of Il22-/- mice. TNF-?, but not IL-22, blockade at the time of antigen inhalation challenge inhibited airway inflammation in epicutaneously sensitized mice. CONCLUSION:Epicutaneous sensitization promotes generation of antigen-specific IL-22-producing T cells that promote airway inflammation and AHR after antigen challenge, suggesting that IL-22 plays an important role in the atopic march.

Dataset Information

Intradermal administration of IL-33 induces allergic airway inflammation.

Publications

Intradermal administration of IL-33 induces allergic airway inflammation.

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