Bioactive extracellular vesicles from a subset of endothelial progenitor cells rescue retinal ischemia and neurodegeneration.

Bioactive extracellular vesicles from a subset of endothelial progenitor cells rescue retinal ischemia and neurodegeneration.
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来自内皮祖细胞亚群的生物活性细胞外囊泡拯救视网膜缺血和神经变性。

DOI:
10.1172/jci.insight.155928
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发表时间:
2022-06-22
期刊:
影响因子:
8
通讯作者:
Friedlander, Martin
Friedlander, Martin
中科院分区:
医学1区
文献类型:
--
作者:
Marra, Kyle, V;Aguilar, Edith;Guoqin, Wei;Usui-Ouchi, Ayumi;Ideguchi, Yochiro;Sakimoto, Susumu;Friedlander, Martin

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神经血管单元(NVU)的破坏是各种中枢神经系统疾病的病理生理基础。修复NVU功能障碍的一种策略是使用干细胞/祖细胞为NVU功能耦合和相互依赖的脉管系统和周围的中枢神经系统实质提供营养支持。内皮祖细胞的一个亚群,内皮集落形成细胞(ecfc)高表达CD44透明质酸受体(CD44hi),通过旁分泌机制提供这种神经血管营养支持。在这里,我们报告了CD44hi ECFCs (EVshi)的生物活性细胞外囊泡是旁分泌介质,概括了完整细胞治疗在小鼠缺血性/神经退行性视网膜病变模型中的作用;CD44 (EVslo)低表达水平的ecfc囊泡无效。小RNA测序比较了EVshi和EVslo的microRNA货物,确定了有助于这些作用的候选microRNA。EVshi可能通过多种机制修复NVU功能障碍,稳定缺氧血管,促进血管生长,支持神经细胞。
Disruption of the neurovascular unit (NVU) underlies the pathophysiology of various CNS diseases. One strategy to repair NVU dysfunction uses stem/progenitor cells to provide trophic support to the NVU’s functionally coupled and interdependent vasculature and surrounding CNS parenchyma. A subset of endothelial progenitor cells, endothelial colony-forming cells (ECFCs) with high expression of the CD44 hyaluronan receptor (CD44hi), provides such neurovasculotrophic support via a paracrine mechanism. Here, we report that bioactive extracellular vesicles from CD44hi ECFCs (EVshi) are paracrine mediators, recapitulating the effects of intact cell therapy in murine models of ischemic/neurodegenerative retinopathy; vesicles from ECFCs with low expression levels of CD44 (EVslo) were ineffective. Small RNA sequencing comparing the microRNA cargo from EVshi and EVslo identified candidate microRNAs that contribute to these effects. EVshi may be used to repair NVU dysfunction through multiple mechanisms to stabilize hypoxic vasculature, promote vascular growth, and support neural cells.
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