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ID 115073
Title Alternative
汎FGF受容体阻害は肺線維症に対して二面性の作用を示す
Dual effects of FGFR inhibition in lung fibrosis
Author
Koyama, Kazuya Tokushima University
Okazaki, Hiroyasu Tokushima University
Chen, Yajuan Tokushima University
Nishimura, Haruka Tokushima University
Keywords
Fibroblast growth factor
Pulmonary fibrosis
Epithelial recovery
Content Type
Thesis or Dissertation
Description
[Rationale] Fibroblast growth factors (FGF) are major factors associated with the pathogenesis of pulmonary fibrosis. Nintedanib, a tyrosine kinase inhibitor targeting several growth factor receptors including the FGF receptor (FGFR), has been approved for the treatment of idiopathic pulmonary fibrosis (IPF). On the other hand, recent reports suggest that FGF are required for epithelial recovery. In this study, we focused on FGF signaling to both fibroblasts and alveolar epithelial cells (AECs), and examined the effect of a pan-FGFR blocker on experimental pulmonary fibrosis in mice.
[Methods] The effects of BGJ398, a pan-FGFR inhibitor, on the migration and proliferation of fibroblasts and AECs were assessed using transwell migration or 3H-thymidine incorporation assays. The expression of FGFR was analyzed using immunoblot or flow cytometry. We also investigated the effect of BGJ398 on the pulmonary fibrosis induced by bleomycin in mice.
[Results] Both lung fibroblasts and AECs expressed FGFRs. BGJ398 significantly inhibited the proliferation and migration of lung fibroblasts stimulated with FGF2. BGJ398 also reduced the proliferation of AECs in response to FGF2. Although the administration of BGJ398 ameliorated pulmonary fibrosis in bleomycin-treated mice, it increased mortality due to alveolar injury and inhibition of AEC regeneration.
[Conclusions] These data suggest that the total inhibition of FGFR signaling can suppress lung fibrosis by inhibiting fibroblast activities, although alveolar injury is simultaneously caused.
Journal Title
American Journal of Respiratory Cell and Molecular Biology
ISSN
15354989
NCID
AA12060923
Publisher
American Thoracic Society
Published Date
2020-04-27
Remark
内容要旨・審査要旨・論文本文の公開
本論文は,著者Shun Morizumiの学位論文として提出され,学位審査・授与の対象となっている。 論文本文は2021-04-27以降公開予定。
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
jpn
TextVersion
その他
MEXT report number
甲第3430号
Diploma Number
甲医第1460号
Granted Date
2020-07-30
Degree Name
Doctor of Medical Science
Grantor
Tokushima University
departments
Medical Sciences
University Hospital