Suppression of plasminogen activator inhibitor-1 by RNA interference attenuates pulmonary fibrosis
Thorax 65 巻 4 号
334-340 頁
2010 発行
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Thorax_65_334.pdf
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種類 :
全文
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タイトル ( eng ) |
Suppression of plasminogen activator inhibitor-1 by RNA interference attenuates pulmonary fibrosis
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作成者 |
Hattori Noboru
Tanimoto Takuya
Furonaka Makoto
Ishikawa Nobuhisa
Yokoyama Akihito
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収録物名 |
Thorax
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巻 | 65 |
号 | 4 |
開始ページ | 334 |
終了ページ | 340 |
抄録 |
Background and aim: There is a growing body of evidence demonstrating that plasminogen activator inhibitor-1 (PAI-1) is involved in the progression of pulmonary fibrosis. In fact, PAI-1 knockout mice are protected from bleomycin-induced pulmonary fibrosis. This study was conducted to determine whether the intrapulmonary administration of small interfering RNA (siRNA) targeting PAI-1 (PAI-1-siRNA) limits the development of bleomycin-induced pulmonary fibrosis.
Methods: Lung biopsies from patients with idiopathic pulmonary fibrosis (IPF) were stained for PAI-1. The distribution of siRNA in the lung, the PAI-1 level in bronchoalveolar (BAL) fluid and the extent of fibrotic changes in the lung were evaluated following the intranasal administration of PAI-1-siRNA in a mouse model of bleomycin-induced pulmonary fibrosis. The effect of PAI-1-siRNA on the epithelial to mesenchymal transition (EMT) was also evaluated using a mouse lung epithelial cell line, LA-4. Results: PAI-1 was overexpressed in the hyperplastic type 2 pneumocytes lining the honeycomb lesions of patients with IPF. The single intranasal instillation of PAI-1-siRNA resulted in the diffuse uptake of siRNA into the epithelial cells lining the dense fibrotic lesions. The repeated administration of PAI-1-siRNA initiated during either the inflammatory or the fibrotic phase into bleomycin-injured mice reduced the PAI-1 level in BAL fluid and limited the accumulation of collagen in the lungs. EMT induced by transforming growth factor β (TGFβ) in LA-4 cells was inhibited by transfection with PAI-1-siRNA. Conclusions: The direct suppression of PAI-1 in the lung by the intrapulmonary administration of PAI-1-siRNA attenuated the development and progression of pulmonary fibrosis. The inhibition of EMT may be, at least in part, involved in this effect. |
NDC分類 |
医学 [ 490 ]
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言語 |
英語
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資源タイプ | 学術雑誌論文 |
出版者 |
BMJ Publishing Group
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発行日 | 2010 |
権利情報 |
Copyright (c) 2010 BMJ Publishing Group & British Thoracic Society
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出版タイプ | Version of Record(出版社版。早期公開を含む) |
アクセス権 | オープンアクセス |
収録物識別子 |
[ISSN] 0040-6376
[DOI] 10.1136/thx.2009.119974
[NCID] AA00863090
[DOI] http://dx.doi.org/10.1136/thx.2009.119974
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