Nedd4L suppression in lung fibroblasts facilitates pathogenesis of lung fibrosis.
Nedd4L suppression in lung fibroblasts facilitates pathogenesis of lung fibrosis.
复制标题
肺成纤维细胞中的 Nedd4L 抑制促进肺纤维化的发病机制。
DOI:
10.1016/j.trsl.2022.10.002
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发表时间:
2023-03
影响因子:
7.8
通讯作者:
Zhao, Yutong
中科院分区:
文献类型:
--
作者:
Li, Shuang;Ye, Qinmao;Wei, Jianxin;Taleb, Sarah J.;Wang, Heather;Zhang, Yingze;Kass, Daniel J.;Horowitz, Jeffrey C.;Zhao, Jing;Zhao, Yutong
Ubiquitination-mediated protein degradation is associated with the development of pulmonary fibrosis. We and others have shown that Nedd4L plays anti-inflammatory and anti-fibrotic roles by targeting lysophosphatidic acid receptor 1 (LPAR1), p-Smad2/3, and β-catenin, and other molecules for their degradation in lung epithelial cells and fibroblasts. However, the molecular regulation of Nedd4L expression in lung fibroblasts has not been studied. In this study, we find that Nedd4L levels are significantly suppressed in lung myofibroblasts in IPF patients and in experimental pulmonary fibrosis, and in TGF-β1-treated lung fibroblasts. Nedd4L knockdown promotes TGF-β1-mediated phosphorylation of Smad2/3 and lung myofibroblast differentiation. Mechanistically, Nedd4L targets TGF-β receptor II (TβRII), the first key enzyme of TGF-β1-mediated signaling, for its ubiquitination and degradation. Further, we show that inhibition of transcriptional factor E2F rescues Nedd4L levels and mitigates experimental pulmonary fibrosis. Together, our data reveal insight into mechanisms by which E2F-mediated Nedd4L suppression contributes to the pathogenesis of lung fibrosis. This study provides evidence showing that upregulation of Nedd4L is a potential therapeutic strategy to treat fibrotic disorders including lung fibrosis.
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