Imatinib mesylate inhibits the profibrogenic activity of TGF-beta and prevents bleomycin-mediated lung fibrosis.
J Clin Invest
; 114(9): 1308-16, 2004 Nov.
Article
en En
| MEDLINE
| ID: mdl-15520863
ABSTRACT
Idiopathic pulmonary fibrosis is a progressive and fatal fibrotic disease of the lungs with unclear etiology. Prior efforts to treat idiopathic pulmonary fibrosis that focused on anti-inflammatory therapy have not proven to be effective. Recent insight suggests that the pathogenesis is mediated through foci of dysregulated fibroblasts driven by profibrotic cytokine signaling. TGF-beta and PDGF are 2 of the most potent of these cytokines. In the current study, we investigated the role of TGF-beta-induced fibrosis mediated by activation of the Abelson (Abl) tyrosine kinase. Our data indicate that fibroblasts respond to TGF-beta by stimulating c-Abl kinase activity independently of Smad2/3 phosphorylation or PDGFR activation. Moreover, inhibition of c-Abl by imatinib prevented TGF-beta-induced ECM gene expression, morphologic transformation, and cell proliferation independently of any effect on Smad signaling. Further, using a mouse model of bleomycin-induced pulmonary fibrosis, we found a significant inhibition of lung fibrosis by imatinib. Thus, Abl family members represent common targets for the modulation of profibrotic cytokine signaling.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Piperazinas
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Pirimidinas
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Bleomicina
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Factor de Crecimiento Transformador beta
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Pulmón
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Antineoplásicos
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Año:
2004
Tipo del documento:
Article