Sphingosine-1-Phosphate Aggravates Antigen-Induced Airway Inflammation in Mice

Chiba, Yoshihiko; Suzuki, Kanako; Kurihara, Eriko; Uechi, Miho; Sakai, Hiroyasu; Misawa, Miwa

Sphingosine-1-Phosphate Aggravates Antigen-Induced Airway Inflammation in Mice

Yoshihiko Chiba^*, Kanako Suzuki, Eriko Kurihara, Miho Uechi, Hiroyasu Sakai, Miwa Misawa

Department of Pharmacology, School of Pharmacy, Hoshi University, Tokyo, Japan

Article Information

Identifiers and Pagination:

Year: 2010
Volume: 4
First Page: 82
Last Page: 85
Publisher ID: TORMJ-4-82
DOI: 10.2174/1874306401004010082

Article History:

Received Date: 6/5/2010
Revision Received Date: 16/7/2010
Acceptance Date: 1/9/2010
Electronic publication date: 7/08/2010
Collection year: 2010

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© Chiba et al.; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

^* Address correspondence to this author at the Department of Pharmacology, School of Pharmacy, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan; Tel: 81-3-5498-5786; Fax: 81-3-5498-5787; E-mail: chiba@hoshi.ac.jp

Recent investigations suggest an involvement of sphingosine-1-phosphate (S1P) in the pathogenesis of allergic bronchial asthma. However, the role of S1P in the development of asthma is still controversial. Our aim was to investigate the effects of intranasal application of S1P on antigen-induced airway inflammation in a mouse model of allergic bronchial asthma.

Methodology:

Male BALB/c mice were actively sensitized with ovalbumin antigen, and were repeatedly challenged with aerosolized antigen. Animals also received an intranasal administration of S1P (10-5 M, 20 µL) or its vehicle (1% methanol in sterile PBS, 20 µL) 30 min prior to each antigen challenge. Histological examinations of the lungs and determination of cell number in the bronchoalveolar lavage fluids (BALFs) were studied.

Results:

The airway inflammation induced by antigen exposure was significantly augmented by the intranasal administration of S1P: the cell number in BALFs of the S1P-treated, antigen-challenged mice (S1P-Challenged, 48.9±4.8 x 10⁴/mL BALF) was significantly increased as compared with those of the vehicle-treated, antigen-challenged ones (Vehicle-Challenged, 26.3±5.7 x 10⁴/mL BALF, P<0.01).

Conclusion:

In mice, the intranasal administration of S1P might aggravate the antigen-induced airway inflammation.

Keywords: Sphingosine-1-phosphate (S1P), intranasal administration, allergic bronchial asthma, airway inflammation, mouse..

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RESEARCH ARTICLE

Sphingosine-1-Phosphate Aggravates Antigen-Induced Airway Inflammation in Mice

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