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オクニシ カツヒデ
Okunishi Katsuhide
奥西 勝秀 所属 東邦大学 医学部 医学科 職種 教授 |
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| 論文種別 | 原著 |
| 言語種別 | 英語 |
| 査読の有無 | 査読あり |
| 表題 | A novel role of hepatocyte growth factor as an immune regulator through suppressing dendritic cell function. |
| 掲載誌名 | 正式名：Journal of immunology (Baltimore, Md. : 1950) ISSNコード：0022-1767 |
| 掲載区分 | 国外 |
| 出版社 | AMER ASSOC IMMUNOLOGISTS |
| 巻・号・頁 | 175(7),pp.4745-53 |
| 著者・共著者 | Katsuhide Okunishi,Makoto Dohi,Kazuyuki Nakagome,Ryoichi Tanaka,Shinya Mizuno,Kunio Matsumoto,Jun-Ichi Miyazaki,Toshikazu Nakamura,Kazuhiko Yamamoto |
| 発行年月 | 2005/10/01 |
| 概要 | Hepatocyte growth factor (HGF) plays an important role in many biological events such as angiogenesis, cell proliferation, anti-fibrosis and antiapoptosis. It is well known that HGF promotes tumor progression and suppresses development of fibrosis after tissue injury. In contrast, its role in immune-mediated disorders has not been fully clarified. In the present study, we examined the role of HGF in Ag-specific immune response using in vitro studies and an experimental model of allergic airway inflammation. We first confirmed that dendritic cells (DCs) expressed the receptor for HGF, c-met, which was not expressed in T cells. Treatment with HGF both in vitro and in vivo potently suppressed DC functions such as Ag-presenting capacity, thus down-regulating Ag-induced Th1- and Th2-type immune responses. Exogenous administration of the HGF expression plasmid into Ag-primed mice markedly suppressed the development of airway eosinophilia and airway hyperresponsiveness, which was induced by Ag inhalation, with suppression of the Ag-presenting capacity of DCs in the lung. HGF exhibited these immunosuppressive effects without up-regulation of IL-10 or TGF-beta. We also found that expression of endogenous HGF in the lung significantly increased following Ag sensitization and inhalation challenges. Finally, neutralization of endogenous HGF in vivo significantly increased airway eosinophilia and airway hyperresponsiveness with up-regulation of the Ag-presenting capacity of DCs in the lung. These results demonstrated a novel, significant, and possibly therapeutic role of HGF as a potent regulator in immune-mediated disorders such as asthma. |
| DOI | 10.4049/jimmunol.175.7.4745 |
| PMID | 16177122 |