IL-22 attenuates IL-25 production by lung epithelial cells and inhibits antigen-induced eosinophilic airway inflammation

JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY

卷:128

Article

Takahashi, Kentaro¹  Hirose, Koichi¹  Kawashima, Saki¹  Niwa, Yusuke¹  Wakashin, Hidefumi¹  Iwata, Arifumi¹  Tokoyoda, Koji²  Renauld, Jean-Christophe³  Iwamoto, Itsuo⁴  Nakayama, Toshinori²  Nakajima, Hiroshi¹ 

[1] Chiba Univ, Grad Sch Med, Dept Mol Genet, Chiba 2608670, Japan

[2] Chiba Univ, Grad Sch Med, Dept Immunol, Chiba 2608670, Japan

[3] Catholic Univ Louvain, Ludwig Inst Canc Res, Brussels Branch, de Duve Inst, B-1200 Brussels, Belgium

[4] Asahi Gen Hosp, Res Ctr Allergy & Clin Immunol, Chiba, Japan

关键词: Allergic inflammation;    asthma;    IL-22;    eosinophils;    IL-25;   

DOI  :  10.1016/j.jaci.2011.06.018

来源: Elsevier

【 摘 要 】

Background: IL-22 functions as both a proinflammatory cytokine and an anti-inflammatory cytokine in various inflammations, depending on the cellular and cytokine milieu. However, the roles of IL-22 in the regulation of allergic airway inflammation are still largely unknown. Objective: We sought to determine whether IL-22 is involved in the regulation of allergic airway inflammation. Methods: We examined IL-22 production and its cellular source at the site of antigen-induced airway inflammation in mice. We also examined the effect of IL-22 neutralization, as well as IL-22 administration, on antigen-induced airway inflammation. We finally examined the effect of IL-22 on IL-25 production from a lung epithelial cell line (MLE-15 cells). Results: Antigen inhalation induced IL-22 production in the airways of sensitized mice. CD4(+) T cells, but not other lymphocytes or innate cells, infiltrating in the airways produced IL-22, and one third of IL-22-producing CD4(+) T cells also produced IL-17A. The neutralization of IL-22 by anti-IL-22 antibody enhanced antigen-induced IL-13 production, eosinophil recruitment, and goblet cell hyperplasia in the airways. On the other hand, intranasal administration of recombinant IL-22 attenuated antigen-induced eosinophil recruitment into the airways. Moreover, anti-IL-22 antibody enhanced antigen-induced IL-25 production in the airways, and anti-IL-25 antibody reversed the enhancing effect of anti-IL-22 antibody on antigen-induced eosinophil recruitment into the airways. Finally, IL22 inhibited IL-13-mediated enhancement of IL-25 expression in IL-1 beta- or LPS-stimulated MLE-15 cells. Conclusion: IL-22 attenuates antigen-induced airway inflammation, possibly by inhibiting IL-25 production by lung epithelial cells. (J Allergy Clin Immunol 2011;128:1067-76.)

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