Transplantation of Cardiac Mesenchymal Stem Cell-Derived Exosomes Promotes Repair in Ischemic Myocardium.

Transplantation of Cardiac Mesenchymal Stem Cell-Derived Exosomes Promotes Repair in Ischemic Myocardium.
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DOI:
10.1007/s12265-018-9822-0
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发表时间:
2018-10
影响因子:
3.4
通讯作者:
Tang Y
Tang Y
中科院分区:
医学3区
文献类型:
--
作者:
Ju C;Shen Y;Ma G;Liu Y;Cai J;Kim IM;Weintraub NL;Liu N;Tang Y

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我们之前的研究证实了由心脏间充质干细胞(C-MSC-Exo)分泌的外泌体在保护急性缺血心肌免受再灌注损伤中的有益作用。本文研究了C-MSC外泌体对缺血心肌血管生成的影响。我们在小鼠急性心肌梗死(MI)诱导后,在梗死边界区心肌内注射C-MSC-Exo或PBS。我们观察到,心肌梗死后1个月,与PBS处理的对照心脏相比,用C-MSC-Exo处理的心脏表现出更好的心功能。与PBS相比,用C-MSC-Exo处理的心脏毛细血管密度和ki67阳性细胞明显更高。此外,C-MSC-Exo治疗增加了梗死心脏的心肌细胞增殖。综上所述,心肌梗死后心肌内输送C-MSC-Exo可促进心肌血管生成,促进心肌细胞增殖,维持心功能。C-MSC-Exo是一种新型的无细胞心脏修复疗法。
Our previous study demonstrated the beneficial effects of exosomes secreted by cardiac mesenchymal stem cells (C-MSC-Exo) in protecting acute ischemic myocardium from reperfusion injury. Here, we investigated the effect of exosomes from C-MSC on angiogenesis in ischemic myocardium. We intramyocardially injected C-MSC-Exo or PBS into the infarct border zone after induction of acute mouse myocardial infarction (MI). We observed that hearts treated with C-MSC-Exo exhibit improved cardiac function compared to control hearts treated with PBS at one month after MI. Capillary density and Ki67-postive cells were significantly higher following treatment C-MSC-Exo as compared with PBS. Moreover, C-MSC-Exo treatment increased cardiomyocyte proliferation in infarcted hearts. In conclusion, intramyocardial delivery of C-MSC-Exo after myocardial infarction enhances cardiac angiogenesis, promotes cardiomyocyte proliferation, and preserves heart function. C-MSC-Exo constitute a novel form of cell-free therapy for cardiac repair.
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