Journal of Pharmacological Sciences
Online ISSN : 1347-8648
Print ISSN : 1347-8613
ISSN-L : 1347-8613
Short Communications
Abrogation of Bronchial Eosinophilic Inflammation and Attenuated Eotaxin Content in Protease-Activated Receptor 2-Deficient Mice
Toshiaki Takizawa, Masaki Tamiya, Takuya Hara, Jiro Matsumoto, Naohiro Saito, Toru Kanke, Junichi Kawagoe, Yukio Hattori
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Keywords: protease-activated receptor 2, eosinophil, eotaxin
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2005 Volume 98 Issue 1 Pages 99-102

View "Advance Publication" version (May 7, 2005).
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Abstract

Protease-activated receptor 2 (PAR2) belongs to the PAR family (PAR1 to PAR4), which is activated by serine proteases (trypsin, tryptase, etc.). In this study, we evaluated the role of PAR2 in allergic inflammation of airways using PAR2-deficient (PAR2−/−) mice. In wild- type mice, infiltration of eosinophils and high eotaxin content were found in bronchoalveolar lavage fluid (BALF) after ovalbumin (OA) sensitization and following challenge. In contrast, both OA-induced infiltration of eosinophils and increase of eotaxin content were abrogated in BALF from PAR2−/− mice. The activation of PAR2 might be essential in the production of eotaxin and consequential allergic inflammation in airways.

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© The Japanese Pharmacological Society 2005
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