The Journal of Experimental Medicine
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Published 4 August 2003. doi:10.1084/jem.20021384
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© Rockefeller University Press, 0022-1007/2003/8/411 $5.00
The Journal of Experimental Medicine, Volume 198, Number 3, 411-421

Peroxisome Proliferator–activated Receptors {alpha} and {gamma} Down-regulate Allergic Inflammation and Eosinophil Activation

Gaetane Woerly1, Kohei Honda1, Marc Loyens1, Jean-Paul Papin1, Johan Auwerx3, Bart Staels2, Monique Capron1 and David Dombrowicz1

1 Institut National de la Santé et de la Recherche Médicale (INSERM), U547-IFR17, Institut Pasteur de Lille, 59019 Lille, France
2 INSERM U545, Institut Pasteur de Lille and Faculté de Pharmacie, Université de Lille II, 59019 Lille, France
3 Institut de Génétique et de Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique (CNRS)/INSERM/Université Louis Pasteur, 67401 Ilkirch, France

Address correspondence to David Dombrowicz, Institut National de la Santé et de la Recherche Médicale U547, Institut Pasteur de Lille 1, rue Prof. Calmette BP245, 59019 Lille Cedex, France. Phone: 33-03-20-87-79-67; Fax: 33-03-20-87-78-88; email: david.dombrowicz{at}pasteur-lille.fr

Allergic asthma is characterized by airway hyperresponsiveness, eosinophilia, and mucus accumulation and is associated with increased IgE concentrations. We demonstrate here that peroxisome proliferator–activated receptors (PPARs), PPAR-{alpha} and PPAR-{gamma}, which have been shown recently to be involved in the regulation of various cell types within the immune system, decrease antigen-induced airway hyperresponsiveness, lung inflammation, eosinophilia, cytokine production, and GATA-3 expression as well as serum levels of antigen-specific IgE in a murine model of human asthma. In addition, we demonstrate that PPAR-{alpha} and -{gamma} are expressed in eosinophils and their activation inhibits in vitro chemotaxis and antibody-dependent cellular cytotoxicity. Thus, PPAR-{alpha} and -{gamma} (co)agonists might be of therapeutic interest for the regulation of allergic or inflammatory reactions by targeting both regulatory and effector cells involved in the immune response.

Key Words: nuclear receptors • asthma • eosinophils • IgE • ADCC


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