Cited by 233Extracellular vesicles in diseaseMesenchymal stem cell researchAngiogenesis and VEGF in Cancer

Exosomes Derived from Hypoxia-Treated Human Adipose Mesenchymal Stem Cells Enhance Angiogenesis Through the PKA Signaling Pathway

Xue, Chunling, Shen, Yamei, Li, Xuechun, Li, Ba, Zhao, Sun, Gu, Junjie, Chen, Yunfei, Ma, Baitao +3 more·2018·Stem Cells and Development

Abstract

Angiogenesis is a complicated and sequential process that plays an important role in different physiological processes. Mesenchymal stem cells (MSCs), which are pluripotent stem cells, are widely used for the treatment of ischemic and traumatic diseases, and exosomes derived from these cells can also promote angiogenesis. Therefore, we aimed to uncover mechanisms to improve MSC exosome-mediated angiogenesis. For this study, we isolated human adipose-derived MSCs (hAD-MSCs) and assessed differentiation ability and markers. Cells were divided into hypoxia-treated MSCs (H-MSCs) and normoxia-treated MSCs (N-MSC), and exosomes were extracted by ultrafiltration. Exosomes (100 μg/mL) from H-MSCs and N-MSCs were added to human umbilical vein endothelial cells (HUVECs). Exosome uptake and the ability of endothelial cells to form tubes were detected in real time. Protein samples were collected at different time points to detect the expression of inhibitors (Vash1) and enhancers (Angpt1 and Flk1) of angiogenesis; we also assessed their related signaling pathways. We found that exosomes from the hypoxia group were more easily taken up by HUVECs; furthermore, their angiogenesis stimulatory activity was also significantly enhanced compared to that with exosomes from the normoxia group. HUVECs exposed to exosomes from H-MSCs significantly upregulated angiogenesis-stimulating genes and deregulated angiogenesis-inhibitory genes. The expression of vascular endothelial growth factor (VEGF) and activation of the protein kinase A (PKA) signaling pathway in HUVECs were significantly increased by hypoxia-exposed exosomes. Moreover, a PKA inhibitor was shown to significantly suppress angiogenesis. Finally, we concluded that hypoxia-exposed exosomes derived from hAD-MSCs can improve angiogenesis by activating the PKA signaling pathway and promoting the expression of VEGF. These results could be used to uncover safe and effective treatments for traumatic diseases.

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Crossref · 10.1089/scd.2017.0296

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Authors
Xue, C., Shen, Y., Li, X., Li, B., Zhao, S., Gu, J., Chen, Y., Ma, B., Wei, J., Han, Q., & Zhao, R. C.
Affiliations
  • Chinese Academy of Medical Sciences & Peking Union Medical College (CN)
  • Beijing Key Laboratory (No. BZO381), Center of Excellence in Tissue Engineering Chinese Academy of Medical Sciences, Peking Union Medical College Hospital, School of Basic Medicine Peking Union Medical College, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, Beijing, People's Republic of China.
Corresponding author
Zhao, Robert C.
Venue
Stem Cells and Development
Published
2018-04
Volume
27
Issue
7
Pages
456-465
ISSN
  • 1525-8165 (ISSN-L)
  • 1547-3287
  • 1557-8534
OpenAlex
W2794366861
Cited by
232
References
21
Citations by year
2026: 14 · 2025: 19 · 2024: 31 · 2023: 34 · 2022: 36 · 2021: 45 · 2020: 35 · 2019: 14 · 2018: 4
FWCI
8.71
Type
journal article
Language
en
Open access
closed
Locations
  • Stem Cells and Development (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Science Foundation
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Extracellular vesicles in disease
  • Health Sciences › Medicine › Genetics › Mesenchymal stem cell research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Angiogenesis and VEGF in Cancer
Keywords
exosomes, adipose-derived stem cells, hypoxia, angiogenesis, vascular endothelial growth factor, endothelial cells, exosome uptake, angiogenesis inhibitors
MeSH terms
Adipose Tissue, Cell Differentiation, Cells, Cultured, Humans, Signal Transduction, Cell Hypoxia, Gene Expression, Cyclic AMP-Dependent Protein Kinases, Neovascularization, Physiologic, Vascular Endothelial Growth Factor A, Cell Proliferation, Exosomes, Mesenchymal Stem Cells, Human Umbilical Vein Endothelial Cells

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