| A Possible Role of Galectin-9 in the Pulmonary Fibrosis of Patients with Interstitial Pneumonia. | |
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MedLine Citation:
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PMID: 23321864 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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BACKGROUND: Galectin-9 (Gal-9) is a β-galactoside-binding protein that induces biological reactions, such as cell activation, chemoattraction, and apoptosis. We evaluated the role of Gal-9 in the pathogenesis of interstitial pneumonia (IP). METHODS: Gal-9 levels in the bronchoalveolar lavage fluid (BALF) of patients with IP associated with collagen vascular disease (CVD-IP) and with idiopathic interstitial pneumonias (IIPs), including idiopathic pulmonary fibrosis (IPF) and idiopathic nonspecific interstitial pneumonia (idiopathic NSIP), were estimated by enzyme-linked immunosorbent assay. Gal-9 expression in the lungs of these patients was evaluated using immunohistochemistry. The effect of Gal-9 on the growth and apoptosis of human lung fibroblast cells was assessed in vitro. RESULTS: Gal-9 levels in the BALF were significantly higher in patients with CVD-IP than in patients with IIPs. Gal-9 levels significantly correlated with both the total cell count and the absolute number of lymphocytes in the BALF of patients with IIPs and CVD-IP. Strong reactivity with anti-Gal-9 antibody was observed in the cytoplasm of alveolar macrophages, lymphocytes, and type II pneumocytes in the lungs of patients with IP. Gal-9 expression in those cells was more remarkable in patients with CVD-IP than in patients with IPF and idiopathic NSIP. Gal-9 suppressed the growth of human lung fibroblast cells in a dose- dependent manner. Gal-9 induced apoptosis of human lung fibroblast cells in a dose-dependent manner. CONCLUSIONS: Our findings suggest that the expression level of Gal-9 in the lung is increased in patients with CVD-IP and that Gal-9 may have a protective role against pulmonary fibrosis of these patients. |
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Authors:
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Nobuhiro Matsumoto; Shigeki Katoh; Shigehisa Yanagi; Yasuji Arimura; Masatoshi Tokojima; Masaki Ueno; Mitsuomi Hirashima; Masamitsu Nakazato |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2013-1-16 |
Journal Detail:
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Title: Lung Volume: - ISSN: 1432-1750 ISO Abbreviation: Lung Publication Date: 2013 Jan |
Date Detail:
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Created Date: 2013-1-16 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7701875 Medline TA: Lung Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Neurology, Respirology, Endocrinology, and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan, nobuhiro@med.miyazaki-u.ac.jp. |
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