Activated Wnt signaling induces myofibroblast differentiation of mesenchymal stem cells, contributing to pulmonary fibrosis

Acute lung injury may lead to fibrogenesis. However, no treatment is currently available. This study was conducted to determine the effects of bone marrow-derived mesenchymal stem cells (MSCs) in a model of HCl-induced acute lung injury in Sprague-Dawley (SD) rats. Stromal cell-derived factor (SDF)-...

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Veröffentlicht in:International journal of molecular medicine 2014-05, Vol.33 (5), p.1097-1109
Hauptverfasser: SUN, ZHAORUI, WANG, CONG, SHI, CHAOWEN, SUN, FANGFANG, XU, XIAOMENG, QIAN, WEIPING, NIE, SHINAN, HAN, XIAODONG
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container_end_page 1109
container_issue 5
container_start_page 1097
container_title International journal of molecular medicine
container_volume 33
creator SUN, ZHAORUI
WANG, CONG
SHI, CHAOWEN
SUN, FANGFANG
XU, XIAOMENG
QIAN, WEIPING
NIE, SHINAN
HAN, XIAODONG
description Acute lung injury may lead to fibrogenesis. However, no treatment is currently available. This study was conducted to determine the effects of bone marrow-derived mesenchymal stem cells (MSCs) in a model of HCl-induced acute lung injury in Sprague-Dawley (SD) rats. Stromal cell-derived factor (SDF)-1 and its receptor CXC chemokine receptor (CXCR)4 have been shown to participate in mobilizing MSCs. Adenovirus carrying the CXCR4 gene was used to transfect MSCs in order to increase the engraftment numbers of MSCs at injured sites. Histological examination data demonstrated that the engraftment of MSCs did not attenuate lung injury and pulmonary fibrosis. The results showed that engraftment of MSCs almost differentiated into myofibroblasts, but rarely differentiated into lung epithelial cells. Additionally, it was demonstrated that activated canonical Wnt/β-catenin signaling in injured lung tissue regulated the myofibroblast differentiation of MSCs in vivo. The in vitro study results demonstrated that activation of the Wnt/β-catenin signaling stimulated MSCs to express myofibroblast markers; however, this process was attenuated by Wnt antagonist DKK1. Therefore, the results demonstrated that the aberrant activation of Wnt signaling induces the myofibroblast differentiation of engrafted MSCs, thus contributing to pulmonary fibrosis following lung injury.
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However, no treatment is currently available. This study was conducted to determine the effects of bone marrow-derived mesenchymal stem cells (MSCs) in a model of HCl-induced acute lung injury in Sprague-Dawley (SD) rats. Stromal cell-derived factor (SDF)-1 and its receptor CXC chemokine receptor (CXCR)4 have been shown to participate in mobilizing MSCs. Adenovirus carrying the CXCR4 gene was used to transfect MSCs in order to increase the engraftment numbers of MSCs at injured sites. Histological examination data demonstrated that the engraftment of MSCs did not attenuate lung injury and pulmonary fibrosis. The results showed that engraftment of MSCs almost differentiated into myofibroblasts, but rarely differentiated into lung epithelial cells. Additionally, it was demonstrated that activated canonical Wnt/β-catenin signaling in injured lung tissue regulated the myofibroblast differentiation of MSCs in vivo. 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source Spandidos Publications Journals; MEDLINE; Alma/SFX Local Collection; EZB Electronic Journals Library
subjects Adenoviruses
Animals
Bone marrow
Cell differentiation
Cell Differentiation - drug effects
Cellular signal transduction
Chemokines
Development and progression
Fibroblasts
Fibrosis
Flow cytometry
Genetic aspects
Hydrochloric Acid - toxicity
Lung diseases
lung injury
Male
mesenchymal stem cells
Mesenchymal Stromal Cells - cytology
Mesenchymal Stromal Cells - drug effects
Myofibroblasts - cytology
Myofibroblasts - drug effects
Observations
Pathogenesis
Pulmonary fibrosis
Pulmonary Fibrosis - etiology
Pulmonary Fibrosis - metabolism
Rats
Rats, Sprague-Dawley
Signal Transduction - drug effects
Stem cells
stromal cell-derived factor-1/CXC chemokine receptor 4
Tumor necrosis factor-TNF
Wnt Proteins - metabolism
Wnt/β-catenin signaling
title Activated Wnt signaling induces myofibroblast differentiation of mesenchymal stem cells, contributing to pulmonary fibrosis
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