The Shh/Gli signaling cascade regulates myofibroblastic activation of lung-resident mesenchymal stem cells via the modulation of Wnt10a expression during pulmonary fibrogenesis

Honghui Cao, Xiang Chen, Jiwei Hou, Cong Wang, Zou Xiang, Yi Shen, Xiaodong Han

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)

Abstract

Lung-resident mesenchymal stem cells (LR-MSCs) are important regulators of lung repair and regeneration, and evidence suggests that this cell population also plays a vital role in fibrosis. Crosstalk between sonic hedgehog (Shh) signaling and wingless/integrated (Wnt) has been demonstrated in idiopathic pulmonary fibrosis (IPF). However, the underlying correlation between LR-MSCs and the Shh-Wnt signaling cascade remains poorly understood. Here, we identified Wnt10a as a key factor in pulmonary fibrosis. Using a bleomycin mouse model, we found that highly expressed Wnt10a was secreted by LR-MSCs undergoing myofibroblastic differentiation. LR-MSCs with myofibroblast characteristics isolated from fibrotic lungs exhibited increased Shh pathway activity, suggesting their role as Shh targets. In vitro, LR-MSCs responded to stimulation by recombinant Shh, acquiring a myofibroblast phenotype. We further demonstrated that the Shh/glioblastoma (Gli) system machinery regulated LR-MSC-to-myofibroblast transition and pulmonary fibrosis via manipulation of Wnt/β-catenin signaling. Accordingly, inhibition of the Shh-Wnt signaling cascade prevented LR-MSC transformation into myofibroblasts and ameliorated pulmonary fibrotic lesions. Moreover, induction of Wnt10a expression and activation of Shh/Gli signaling were confirmed in human pulmonary fibrosis. In summary, this study linking the Shh-Wnt signaling cascade with LR-MSC fibrogenic activity furthered the current understanding of pulmonary fibrosis pathogenesis and might provide a new perspective in the development of treatment strategies for IPF.

Original languageEnglish
Pages (from-to)363-377
Number of pages15
JournalLaboratory Investigation
Volume100
Issue number3
DOIs
Publication statusPublished - 20 Sep 2019

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Molecular Biology
  • Cell Biology

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