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Table of Contents
Vol. 160, No. 1, 2013
Issue release date: December 2012
Section title: Original Paper
Int Arch Allergy Immunol 2013;160:27–36
(DOI:10.1159/000338430)

Corticosteroids plus Long-Acting Beta2-Agonists Prevent Double-Stranded RNA-Induced Upregulation of B7-H1 on Airway Epithelium

Kan-o K.a · Matsumoto K.a · Inoue H.a, b · Fukuyama S.a · Asai Y.a · Watanabe W.c · Kurokawa M.c · Araya J.d · Kuwano K.d · Nakanishi Y.a
aResearch Institute for Diseases of the Chest, Graduate School of Medical Sciences, Kyushu University, Fukuoka, bDepartment of Pulmonary Medicine, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, cDepartment of Microbiology, School of Pharmaceutical Sciences, Kyushu University of Health and Welfare, Miyazaki, and dDivision of Respiratory Diseases, Department of Internal Medicine, Jikei University School of Medicine, Tokyo, Japan

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: November 07, 2011
Accepted: March 23, 2012
Published online: August 31, 2012
Issue release date: December 2012

Number of Print Pages: 10
Number of Figures: 5
Number of Tables: 0

ISSN: 1018-2438 (Print)
eISSN: 1423-0097 (Online)

For additional information: http://www.karger.com/IAA

Abstract

Background: Airway viral infections provoke exacerbations of asthma and chronic obstructive pulmonary disease. B7-H1 is a costimulatory molecule that is implicated in an escape mechanism of viruses from host immune systems. This escape may be associated with the persistence of viral infection and lead to exacerbation of underlying diseases. We have shown that an analog of viral double-stranded RNA, polyinosinic-polycytidylic acid (poly IC), upregulated the expression of B7-H1 on airway epithelial cells, an effect which was corticosteroid-resistant. We investigated the effects of corticosteroids plus long-acting β2-agonists (LABAs; fluticasone/salmeterol or budesonide/formoterol) on the expression of B7-H1. Methods: BEAS-2B cells and primary airway epithelial cells were stimulated with poly IC or respiratory syncytial virus. The expression of B7-H1 was assessed by flow cytometry. Results: Poly IC upregulated the expression of B7-H1, which was suppressed by high-concentration corticosteroids but not by LABAs. The upregulation was suppressed by very low-concentration corticosteroids when used in combination with LABAs. Their combination also suppressed the virus-induced upregulation of B7-H1. Poly IC stimulation induced the nuclear translocation of nuclear factor ĸB (NF-ĸB). Inhibitors of NF-ĸB activation prevented the poly IC-induced upregulation of B7-H1. Low-concentration corticosteroids in combination with LABAs enhanced the de novo induction of IĸBα, the endogenous inhibitor of NF-ĸB activation. Conclusions: Fluticasone/salmeterol or budesonide/formoterol attenuate the virus-associated upregulation of B7-H1 on airway epithelial cells via suppression of NF-ĸB activation.

© 2012 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: November 07, 2011
Accepted: March 23, 2012
Published online: August 31, 2012
Issue release date: December 2012

Number of Print Pages: 10
Number of Figures: 5
Number of Tables: 0

ISSN: 1018-2438 (Print)
eISSN: 1423-0097 (Online)

For additional information: http://www.karger.com/IAA


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Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
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