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Article has an altmetric score of 6

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Referenced in 3 patents
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Research Article Free access | 10.1172/JCI119292

Aeroallergen-induced eosinophilic inflammation, lung damage, and airways hyperreactivity in mice can occur independently of IL-4 and allergen-specific immunoglobulins.

S P Hogan, A Mould, H Kikutani, A J Ramsay, and P S Foster

Division of Biochemistry and Molecular Biology, John Curtin School of Medical Research, Australian National University, Canberra.

Find articles by Hogan, S. in: PubMed | Google Scholar

Division of Biochemistry and Molecular Biology, John Curtin School of Medical Research, Australian National University, Canberra.

Find articles by Mould, A. in: PubMed | Google Scholar

Division of Biochemistry and Molecular Biology, John Curtin School of Medical Research, Australian National University, Canberra.

Find articles by Kikutani, H. in: PubMed | Google Scholar

Division of Biochemistry and Molecular Biology, John Curtin School of Medical Research, Australian National University, Canberra.

Find articles by Ramsay, A. in: PubMed | Google Scholar

Division of Biochemistry and Molecular Biology, John Curtin School of Medical Research, Australian National University, Canberra.

Find articles by Foster, P. in: PubMed | Google Scholar

Published March 15, 1997 - More info

Published in Volume 99, Issue 6 on March 15, 1997
J Clin Invest. 1997;99(6):1329–1339. https://doi.org/10.1172/JCI119292.
© 1997 The American Society for Clinical Investigation
Published March 15, 1997 - Version history
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Abstract

In this investigation we have used a mouse model containing certain phenotypic characteristics consistent with asthma and IL-4- and CD40-deficient mice to establish the role of this cytokine and allergen-specific immunoglobulins in the initiation of airways hyperreactivity and morphological changes to the airways in responses to aeroallergen challenge. Sensitization and aerosol challenge of mice with ovalbumin resulted in a severe airways inflammatory response which directly correlated with the induction of extensive airways damage and airways hyperreactivity to beta-methacholine. Inflammatory infiltrates were primarily characterized by the presence of CD4+ T cells and eosinophils. In IL-4-deficient mice, the recruitment of airways eosinophils was impaired, but not abolished in response to aeroallergen. Moreover, the characteristic airways damage and hyperreactivity normally resulting from allergen inhalation were not attenuated. Induction of these structural and functional changes to the airways occurred in the absence of ovalbumin-specific IgE and IgG1, but IgG2a and IgG3 were detected in the sera of IL-4-deficient mice. CD4+ T cells isolated from both wild-type and IL-4-deficient mice given ovalbumin produced significant levels of IL-5 after in vitro stimulation. Treatment of IL-4-deficient mice with anti-IL-5 mAb before aeroallergen challenge abolished blood and airways eosinophilia, lung damage, and airways hyperreactivity. These results indicate that IL-4 is not essential for the development of IL-5-producing CD4+ T cells or for the induction of eosinophilic inflammation and airways damage and hyperreactivity. In response to sensitization and aerosol challenge, CD40-deficient mice did not produce ovalbumin-specific IgE, IgG isotypes, or IgA, and airways inflammation and hyperreactivity were not attenuated. Our results suggest that allergic airways disease can occur via pathways which operate independently of IL-4 and allergen-specific immunoglobulins. Activation of these pathways is intimately associated with IL-5 and eosinophilic inflammation. Such pathways may play a substantive role in the etiology of asthma.

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Referenced in 3 patents
36 readers on Mendeley
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