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- W2567214425 abstract "Interstitial lung fibroblast activation coupled with extracellular matrix production is a pathological signature of idiopathic pulmonary fibrosis (IPF), and is governed by transforming growth factor (TGF)-β/Smad signalling. We sought to define the role of heat shock protein (HSP)90 in profibrotic responses in IPF and to determine the therapeutic effects of HSP90 inhibition in a murine model of pulmonary fibrosis. We investigated the effects of HSP90 inhibition in vitro by applying 17-AAG (17-allylamino-17-demethoxygeldanamycin) to lung fibroblasts and A549 cells and in vivo by administering 17-DMAG (17-dimethylaminoethylamino-17-demethoxygeldanamycin) to mice with bleomycin-induced pulmonary fibrosis. HSP90 expression was increased in (myo)fibroblasts from fibrotic human and mouse lungs compared with controls. 17-AAG inhibited TGF-β1-induced extracellular matrix production and transdifferentiation of lung fibroblasts and epithelial–mesenchymal transition of A549 cells. The antifibrotic effects were associated with TGF-β receptor disruption and inhibition of Smad2/3 activation. Co-immunoprecipitation revealed that HSP90β interacted with TGF-β receptor II and stabilised TGF-β receptors. Furthermore, 17-DMAG improved lung function and decreased fibrosis and matrix metalloproteinase activity in the lungs of bleomycin-challenged mice. In conclusion, this is the first study to demonstrate that HSP90 inhibition blocks pulmonary fibroblast activation and ameliorates bleomycin-induced pulmonary fibrosis in mice." @default.
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- W2567214425 date "2016-12-19" @default.
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- W2567214425 title "Amplified canonical transforming growth factor-β signalling <i>via</i> heat shock protein 90 in pulmonary fibrosis" @default.
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- W2567214425 doi "https://doi.org/10.1183/13993003.01941-2015" @default.
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