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KMID : 1143120120020040256
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Asia Pacific Allergy
2012 Volume.2 No. 4 p.256 ~ p.263
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Interferon-alpha inhibits airway eosinophila and hyperresponsiveness in an animal asthma model
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Kikkawa Yasuko
Sugiyama Kumiya
Obara Kazuki
Hirata Hirokuni
Fukushima Yasutsugu
Toda Masao
Fukuda Takeshi
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Abstract
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Background: Asthma is characterized by a chronic inflammatory process involving high numbers of inflammatory cells and mediators which have multiple inflammatory effects on the airway. Interferon (IFN)-alpha, which is used widely for treating chronic hepatitis C, is reported to have an effect on patients with Churg-Strauss syndrome. Therefore, it may also be suitable for patients with severe asthma.
Objective: We studied the effect of IFN-alpha on airway eosinophilia in a guinea pig model of asthma and the expression of adhesion molecules on human eosinophils and vascular endothelial cells.
Methods: After antigen challenge, airway hyperresponsiveness and airway eosinophilia were measured in a guinea pig asthma model with or without airway IFN-alpha administration. Expression of adhesion molecules on eosinophils and cultured human umbilical vein endothelial cells (HUVECs) was also evaluated with or without IFN-alpha.
Results: IFN-alpha inhibited eosinophil recruitment into the tracheal wall and improved airway hyperresponsiveness in sensitized guinea pigs. IFN-alpha also significantly suppressed IL-1 beta-induced intercellular adhesion molecule-1 (ICAM-1) expression on HUVECs. However, IFN-alpha did not suppress platelet-activating factor-induced macrophage antigen-1 expression on human eosinophils. IFN-alpha significantly inhibited eosinophil adhesion to IL-1 beta-induced HUVECs and migration through IL-1 beta induced HUVECs.
Conclusion: The findings suggest that the modulation of ICAM-1 in lung with pre-existing inflammation following treatment with IFN-alpha may be a novel and selective treatment for control of chronic airway inflammation and hyperresponsiveness associated with asthma.
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KEYWORD
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Adhesion molecule, Asthma, Eosinophil, Interferon-alpha, Intercellular adhesion molecule-1, Macrophage antigen-1
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