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J. Exp. Med.
© The Rockefeller University Press
0022-1007/97/06/2143/14 $2.00
Volume 185, Number 12, June 16, 1997 2143-2156

Interleukin-5 Expression in the Lung Epithelium of Transgenic Mice Leads to Pulmonary Changes Pathognomonic of Asthma

By James J. Lee,* Michael P. McGarry,Dagger Steven C. Farmer,* Karen L. Denzler,* Kirsten A. Larson,* Patricia E. Carrigan,§ Ina E. Brenneise,* Margaret A. Horton,* Angela Haczku,par Erwin W. Gelfand,par George D. Leikauf,§ and Nancy A. Lee*

From the * Department of Biochemistry and Molecular Biology, Mayo Clinic Arizona, Scottsdale, Arizona 85259; Dagger  Department of Laboratory Animal Resources, Roswell Park Cancer Institute, Buffalo, New York 14263; § Department of Environmental Health, Molecular and Cellular Physiology and Medicine, University of Cincinnati, Cincinnati, Ohio 45267; and par  Department of Pediatrics, National Jewish Center for Immunology and Respiratory Medicine, Denver, Colorado 80206

We have generated transgenic mice that constitutively express murine interleukin (IL)-5 in the lung epithelium. Airway expression of this cytokine resulted in a dramatic accumulation of peribronchial eosinophils and striking pathologic changes including the expansion of bronchusassociated lymphoid tissue (BALT), goblet cell hyperplasia, epithelial hypertrophy, and focal collagen deposition. These changes were also accompanied by eosinophil infiltration of the airway lumen. In addition, transgenic animals displayed airway hyperresponsiveness to methacholine in the absence of aerosolized antigen challenge. These findings demonstrate that lung-specific IL-5 expression can induce pathologic changes characteristic of asthma and may provide useful models to evaluate the efficacy of potential respiratory disease therapies or pharmaceuticals.


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