Open AccessHuman Umbilical Cord Mesenchymal Stem Cell Exosomes Enhance Angiogenesis Through the Wnt4/β‐Catenin Pathway
Author(s) -
Zhang Bin,
Wu Xiaodan,
Zhang Xu,
Sun Yaoxiang,
Yan Yongmin,
Shi Hui,
Zhu Yanhua,
Wu Lijun,
Pan Zhaoji,
Zhu Wei,
Qian Hui,
Xu Wenrong
Publication year - 2015
Publication title -
stem cells translational medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.781
H-Index - 71
eISSN - 2157-6580
pISSN - 2157-6564
DOI - 10.5966/sctm.2014-0267
Subject(s) - mesenchymal stem cell , angiogenesis , ex vivo , microvesicles , microbiology and biotechnology , stem cell , wound healing , wnt signaling pathway , catenin , cancer research , medicine , chemistry , immunology , biology , signal transduction , microrna , in vitro , biochemistry , gene
Human umbilical cord mesenchymal stem cells (hucMSCs) and their exosomes have been considered as potential therapeutic tools for tissue regeneration; however, the underlying mechanisms are still not well understood. In this study, we isolated and characterized the exosomes from hucMSCs (hucMSC‐Ex) and demonstrated that hucMSC‐Ex promoted the proliferation, migration, and tube formation of endothelial cells in a dose‐dependent manner. Furthermore, we demonstrated that hucMSC‐Ex promoted wound healing and angiogenesis in vivo by using a rat skin burn model. We discovered that hucMSC‐Ex promoted β‐catenin nuclear translocation and induced the increased expression of proliferating cell nuclear antigen, cyclin D3, N‐cadherin, and β‐catenin and the decreased expression of E‐cadherin. The activation of Wnt/β‐catenin is critical in the induction of angiogenesis by hucMSC‐Ex, which could be reversed by β‐catenin inhibitor ICG‐001. Wnt4 was delivered by hucMSC‐Ex, and the knockdown of Wnt4 in hucMSC‐Ex abrogated β‐catenin nuclear translocation in endothelial cells. The in vivo proangiogenic effects were also inhibited by interference of Wnt4 expression in hucMSC‐Ex. Taken together, these results suggest that hucMSC‐Ex‐mediated Wnt4 induces β‐catenin activation in endothelial cells and exerts proangiogenic effects, which could be an important mechanism for cutaneous wound healing.