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- W2865647788 abstract "Idiopathic pulmonary fibrosis (IPF) is an incurable disease of the lung that is characterized by excessive deposition of extracellular matrix (ECM), resulting in disruption of normal lung function. The signals regulating fibrosis include both transforming growth factor beta (TGF-β) and tissue rigidity and a major signaling pathway implicated in fibrosis involves activation of the GTPase RhoA. During studies exploring how elevated RhoA activity is sustained in IPF, we discovered that not only is RhoA activated by profibrotic stimuli but also that the expression of Rnd3, a major antagonist of RhoA activity, and the activity of p190RhoGAP (p190), a Rnd3 effector, are both suppressed in IPF fibroblasts. Restoration of Rnd3 levels in IPF fibroblasts results in an increase in p190 activity, a decrease in RhoA activity and a decrease in the overall fibrotic phenotype. We also find that treatment with IPF drugs nintedanib and pirfenidone decreases the fibrotic phenotype and RhoA activity through up-regulation of Rnd3 expression and p190 activity. These data provide evidence for a pathway in IPF where fibroblasts down-regulate Rnd3 levels and p190 activity to enhance RhoA activity and drive the fibrotic phenotype." @default.
- W2865647788 created "2018-07-19" @default.
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- W2865647788 date "2018-09-01" @default.
- W2865647788 modified "2023-10-18" @default.
- W2865647788 title "A Rnd3/p190RhoGAP pathway regulates RhoA activity in idiopathic pulmonary fibrosis fibroblasts" @default.
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- W2865647788 doi "https://doi.org/10.1091/mbc.e17-11-0642" @default.
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