Mesenchymal Stem Cell-derived Exosomes Rescue Oxygen-Glucose Deprivation-induced Injury in Endothelial Cells

Author(s): Li-yun Kong, Meng-ya Liang, Jian-ping Liu, Ping Lai, Jun-song Ye, Zu-xiong Zhang, Zhi-ming Du, Jun-jian Yu, Liang Gu, Fa-chun Xie, Zhi-xian Tang*, Zi-you Liu*

Journal Name: Current Neurovascular Research

Volume 17 , Issue 2 , 2020

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Objective: The effects of mesenchymal stem cell (MSC)-derived exosomes on brain microvascular endothelial cells under oxygen-glucose deprivation (OGD), which mimic cells in deep hypothermic circulatory arrest (DHCA) in vitro, are yet to be studied.

Methods: MSCs were co-cultured with primary rat brain endothelial cells, which were then exposed to OGD. Cell viability, apoptosis, the inflammatory factors (IL-1β, IL-6, and TNF-α), and the activation of inflammation-associated TLR4-mediated pyroptosis and the NF-κB signaling pathway were determined. Furthermore, exosomes derived from MSCs were isolated and incubated with endothelial cells to investigate whether the effect of MSCs is associated with MSCderived exosomes. Apoptosis, cell viability, and the inflammatory response were also analyzed in OGD-induced endothelial cells incubated with MSC-derived exosomes.

Results: OGD treatment promoted endothelial cell apoptosis, induced the release of inflammatory factors IL-1β, IL-6, and TNF-α, and inhibited cell viability. Western blot analysis showed that OGD treatment-induced TLR4, and NF-κB p65 subunit phosphorylation and caspase-1 upregulation, while co-culture with MSCs could reduce the effect of OGD treatment on endothelial cells. As expected, the effect of MSC-derived exosomes on OGD-treated endothelial cells was similar to that of MSCs. MSC-derived exosomes alleviated the OGD-induced decrease in the viability of endothelial cells, and increased levels of apoptosis, inflammatory factors, and the activation of inflammatory and inflammatory focal pathways.

Conclusion: Both MSCs and MSC-derived exosomes attenuated OGD-induced rat primary brain endothelial cell injury. These findings suggest that MSC-derived exosomes mediate at least some of the protective effects of MSCs on endothelial cells.

Keywords: Oxygen-Glucose deprivation, brain, endothelial cells, mesenchymal stem cells, inflammatory factors, exosome.

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Year: 2020
Page: [155 - 163]
Pages: 9
DOI: 10.2174/1567202617666200214103950
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