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Published ahead of print on February 7, 2008
Am. J. Respir. Cell Mol. Biol. 2008, doi:10.1165/rcmb.2007-0240OC
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Submitted on June 27, 2007
Revised on February 4, 2008

Adenovirus IL-13-induced Airway Disease in Mice: A Corticosteroid-resistant Model of Severe Asthma

Alex G Therien1, Virginie Bernier2, Sean Weicker2, Paul Tawa3, Jean-Pierre Falgueyret3, Marie-Claude Mathieu3, Jeanne Honsberger2, Veronique Pomerleau3, Annette Robichaud2, Rino Stocco3, Lynn Dufresne2, Hani Houshyar2, Josiane Lafleur2, Chidambaram Ramachandran3, Gary P O'Neill4, Deborah Slipetz2, and Christopher M Tan2*

1 Department of Biochemistry and Molecular Biology, Merck Frosst Centre for Therapeutic Research, Kirkland, QC, Canada; Department of Biochemistry, McGill University, Montreal, QC, Canada, 2 Department of Pharmacology, Merck Frosst Centre for Therapeutic Research, Kirkland, QC, Canada, 3 Department of Biochemistry and Molecular Biology, Merck Frosst Centre for Therapeutic Research, Kirkland, QC, Canada, 4 Department of Pharmacology, Merck Frosst Centre for Therapeutic Research, Kirkland, QC, Canada; Department of Biochemistry and Molecular Biology, Merck Frosst Centre for Therapeutic Research, Kirkland, QC, Canada

* To whom correspondence should be addressed. E-mail: christopher{at}tan@merck.com.

Interleukin 13 (IL-13) is considered to be a key driver of the development of airway allergic inflammation and remodelling leading to airway hyper-responsiveness (AHR). How precisely IL-13 leads to the development of airway inflammation, AHR, and mucus production is not fully understood. In order to identify key mediators downstream of IL-13, we administered adenovirus IL-13 to specifically induce IL-13-dependent inflammation in the lungs of mice. This approach was shown to induce cardinal features of lung disease, specifically airway inflammation, elevated cytokines, AHR, and mucus secretion. Notably, the model is resistant to corticosteroid treatment and is characterized by marked neutrophilia, two hallmarks of more severe forms of asthma. To identify IL-13-dependent mediators, we performed a limited-scale two-dimensional SDS PAGE proteomic analysis and identified proteins significantly modulated in this model. Intriguingly, several identified proteins were unique to this model, whereas others correlated with those modulated in a mouse ovalbumin-induced pulmonary inflammation model. We corroborated this approach by illustrating that proteomic analysis can identify known pathways/ mediators downstream of IL-13. Thus, we have characterized a murine adenovirus IL-13 lung model that recapitulates specific disease traits observed in human asthma, and have exploited this model to identify effectors downstream of IL-13. Collectively, these findings will enable a broader appreciation of IL-13 and its impact on disease pathways in the lung.







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