Emodin ameliorates bleomycin-induced pulmonary fibrosis in rats by suppressing epithelial-mesenchymal transition and fibroblast activation

Aberrant activation of TGF-β1 is frequently encountered and promotes epithelial-mesenchymal transition (EMT) and fibroblast activation in pulmonary fibrosis. The present study investigated whether emodin mediates its effect via suppressing TGF-β1-induced EMT and fibroblast activation in bleomycin (B...

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Veröffentlicht in:Scientific reports 2016-10, Vol.6 (1), p.35696-35696, Article 35696
Hauptverfasser: Guan, Ruijuan, Wang, Xia, Zhao, Xiaomei, Song, Nana, Zhu, Jimin, Wang, Jijiang, Wang, Jin, Xia, Chunmei, Chen, Yonghua, Zhu, Danian, Shen, Linlin
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container_title Scientific reports
container_volume 6
creator Guan, Ruijuan
Wang, Xia
Zhao, Xiaomei
Song, Nana
Zhu, Jimin
Wang, Jijiang
Wang, Jin
Xia, Chunmei
Chen, Yonghua
Zhu, Danian
Shen, Linlin
description Aberrant activation of TGF-β1 is frequently encountered and promotes epithelial-mesenchymal transition (EMT) and fibroblast activation in pulmonary fibrosis. The present study investigated whether emodin mediates its effect via suppressing TGF-β1-induced EMT and fibroblast activation in bleomycin (BLM)-induced pulmonary fibrosis in rats. Here, we found that emodin induced apoptosis and inhibited cellular proliferation, migration and differentiation in TGF-β1-stimulated human embryonic lung fibroblasts (HELFs). Emodin suppressed TGF-β1-induced EMT in a dose- and time-dependent manner in alveolar epithelial A549 cells. Emodin also inhibited TGF-β1-induced Smad2, Smad3 and Erk1/2 activation, suggesting that Smad2/3 and Erk1/2 inactivation mediated the emodin-induced effects on TGF-β1-induced EMT. Additionally, we provided in vivo evidence suggesting that emodin apparently alleviated BLM-induced pulmonary fibrosis and improved pulmonary function by inhibiting TGF-β1 signaling and subsequently repressing EMT, fibroblast activation and extracellular matrix (ECM) deposition. Taken together, our data suggest that emodin mediates its effects mainly via inhibition of EMT and fibroblast activation and thus has a potential for the treatment of pulmonary fibrosis.
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The present study investigated whether emodin mediates its effect via suppressing TGF-β1-induced EMT and fibroblast activation in bleomycin (BLM)-induced pulmonary fibrosis in rats. Here, we found that emodin induced apoptosis and inhibited cellular proliferation, migration and differentiation in TGF-β1-stimulated human embryonic lung fibroblasts (HELFs). Emodin suppressed TGF-β1-induced EMT in a dose- and time-dependent manner in alveolar epithelial A549 cells. Emodin also inhibited TGF-β1-induced Smad2, Smad3 and Erk1/2 activation, suggesting that Smad2/3 and Erk1/2 inactivation mediated the emodin-induced effects on TGF-β1-induced EMT. Additionally, we provided in vivo evidence suggesting that emodin apparently alleviated BLM-induced pulmonary fibrosis and improved pulmonary function by inhibiting TGF-β1 signaling and subsequently repressing EMT, fibroblast activation and extracellular matrix (ECM) deposition. 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The present study investigated whether emodin mediates its effect via suppressing TGF-β1-induced EMT and fibroblast activation in bleomycin (BLM)-induced pulmonary fibrosis in rats. Here, we found that emodin induced apoptosis and inhibited cellular proliferation, migration and differentiation in TGF-β1-stimulated human embryonic lung fibroblasts (HELFs). Emodin suppressed TGF-β1-induced EMT in a dose- and time-dependent manner in alveolar epithelial A549 cells. Emodin also inhibited TGF-β1-induced Smad2, Smad3 and Erk1/2 activation, suggesting that Smad2/3 and Erk1/2 inactivation mediated the emodin-induced effects on TGF-β1-induced EMT. Additionally, we provided in vivo evidence suggesting that emodin apparently alleviated BLM-induced pulmonary fibrosis and improved pulmonary function by inhibiting TGF-β1 signaling and subsequently repressing EMT, fibroblast activation and extracellular matrix (ECM) deposition. Taken together, our data suggest that emodin mediates its effects mainly via inhibition of EMT and fibroblast activation and thus has a potential for the treatment of pulmonary fibrosis.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>27774992</pmid><doi>10.1038/srep35696</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record>
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subjects 13/51
13/95
14/19
631/80/304
692/699/1785
82/80
96/2
A549 Cells
Alveolar Epithelial Cells - drug effects
Alveolar Epithelial Cells - metabolism
Alveoli
Animals
Apoptosis
Bleomycin
Bleomycin - pharmacology
Cell Differentiation - drug effects
Cell Line, Tumor
Cell Proliferation - drug effects
Embryo fibroblasts
Embryos
Emodin
Emodin - pharmacology
Epithelial-Mesenchymal Transition - drug effects
Extracellular matrix
Extracellular Matrix - drug effects
Extracellular Matrix - metabolism
Fibroblasts
Fibroblasts - drug effects
Fibroblasts - metabolism
Fibrosis
Humanities and Social Sciences
Humans
Inactivation
Lung - drug effects
Lung - metabolism
Lung diseases
Male
MAP Kinase Signaling System - drug effects
Mesenchyme
multidisciplinary
Pulmonary fibrosis
Pulmonary Fibrosis - chemically induced
Pulmonary Fibrosis - drug therapy
Pulmonary Fibrosis - metabolism
Rats
Rats, Sprague-Dawley
Respiratory function
Rodents
Science
Signal Transduction - drug effects
Smad2 protein
Smad2 Protein - metabolism
Smad3 protein
Smad3 Protein - metabolism
Transforming Growth Factor beta1 - metabolism
Transforming growth factor-b1
title Emodin ameliorates bleomycin-induced pulmonary fibrosis in rats by suppressing epithelial-mesenchymal transition and fibroblast activation
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