Constitutive production of IL-13 promotes early-life Chlamydia respiratory infection and allergic airway disease

Starkey, M.R., Essilfie, A.T., Horvat, J.C., Kim, R.Y., Nguyen, D.H., Beagley, K.W., Mattes, J., Foster, P.S., & Hansbro, P.M. (2012) Constitutive production of IL-13 promotes early-life Chlamydia respiratory infection and allergic airway disease. Mucosal Immunology, 6(3), pp. 569-579.

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Abstract

Deleterious responses to pathogens during infancy may contribute to infection and associated asthma. Chlamydia respiratory infections in early life are common causes of pneumonia and lead to reduced lung function and asthma. We investigated the role of interleukin-13 (IL-13) in promoting early-life Chlamydia respiratory infection, infection-induced airway hyperresponsiveness (AHR), and severe allergic airway disease (AAD). Infected infant Il13−/− mice had reduced infection, inflammation, and mucus-secreting cell hyperplasia. Surprisingly, infection of wild-type (WT) mice did not increase IL-13 production but reduced IL-13Rα2 decoy receptor levels compared with sham-inoculated controls. Infection of WT but not Il13−/− mice induced persistent AHR. Infection and associated pathology were restored in infected Il13−/− mice by reconstitution with IL-13. Stat6−/− mice were also largely protected. Neutralization of IL-13 during infection prevented subsequent infection-induced severe AAD. Thus, early-life Chlamydia respiratory infection reduces IL-13Rα2 production, which may enhance the effects of constitutive IL-13 and promote more severe infection, persistent AHR, and AAD.

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ID Code: 63109
Item Type: Journal Article
Refereed: Yes
Keywords: Chlamydia, Respiratory infection, Infant infections, Pneumonia, Asthma
DOI: 10.1038/mi.2012.99
ISSN: 1935-3456
Subjects: Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000) > MICROBIOLOGY (060500)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > IMMUNOLOGY (110700)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > MEDICAL MICROBIOLOGY (110800)
Divisions: Current > Schools > School of Biomedical Sciences
Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2012 The Author(s)
Deposited On: 03 Oct 2013 22:58
Last Modified: 25 Oct 2013 03:47

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