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- W2117624308 abstract "Myofibroblasts are effector cells in fibrotic disorders that synthesize and remodel the extracellular matrix (ECM). This study investigated the role of the Src kinase pathway in myofibroblast activation in vitro and fibrogenesis in vivo. The profibrotic cytokine, transforming growth factor <i>β</i>1 (TGF-<i>β</i>1), induced rapid activation of Src kinase, which led to myofibroblast differentiation of human lung fibroblasts. The Src kinase inhibitor AZD0530 (saracatinib) blocked TGF-<i>β</i>1–induced Src kinase activation in a dose-dependent manner. Inhibition of Src kinase significantly reduced <i>α</i>-smooth muscle actin (<i>α</i>-SMA) expression, a marker of myofibroblast differentiation, in TGF-<i>β</i>1–treated lung fibroblasts. In addition, the induced expression of collagen and fibronectin and three-dimensional collagen gel contraction were also significantly inhibited in AZD0530-treated fibroblasts. The therapeutic efficiency of Src kinase inhibition in vivo was tested in the bleomycin murine lung fibrosis model. Src kinase activation and collagen accumulation were significantly reduced in the lungs of AZD0530-treated mice when compared with controls. Furthermore, the total fibrotic area and expression of <i>α</i>-SMA and ECM proteins were significantly decreased in lungs of AZD0530-treated mice. These results indicate that Src kinase promotes myofibroblast differentiation and activation of lung fibroblasts. Additionally, these studies provide proof-of-concept for targeting the noncanonical TGF-<i>β</i> signaling pathway involving Src kinase as an effective therapeutic strategy for lung fibrosis." @default.
- W2117624308 created "2016-06-24" @default.
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- W2117624308 date "2014-07-21" @default.
- W2117624308 modified "2023-10-12" @default.
- W2117624308 title "Therapeutic Targeting of Src Kinase in Myofibroblast Differentiation and Pulmonary Fibrosis" @default.
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- W2117624308 doi "https://doi.org/10.1124/jpet.114.216044" @default.
- W2117624308 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4165028" @default.
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