Effective treatment of optic neuropathies by intraocular delivery of MSC-sEVs through augmenting the G-CSF- macrophage pathway
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA(2024)
摘要
Optic neuropathies, characterized by injury of retinal ganglion cell (RGC) axons of the optic nerve, cause incurable blindness worldwide. Mesenchymal stem cell-derived small extracellular vesicles (MSC-sEVs) represent a promising "cell - free" therapy for regenerative medicine; however, the therapeutic effect on neural restoration fluctuates, and the underlying mechanism is poorly understood. Here, we illustrated that intraocular administration of MSC-sEVs promoted both RGC survival and axon regeneration in an optic nerve crush mouse model. Mechanistically, MSC-sEVs primarily targeted retinal mural cells to release high levels of colony- stimulating factor 3 (G-CSF) that recruited a neural restorative population of Ly6Clow monocytes/monocyte- derived macrophages (Mo/M(13). Intravitreal administration of G-CSF, a clinically proven agent for treating neutropenia, or donor Ly6Clow Mo/M(13 markedly improved neurological outcomes in vivo. Together, our data define a unique mechanism of MSC-sEV- induced G- CSF- to- Ly6Clow Mo/M(13 signaling in repairing optic nerve injury and highlight local delivery of MSC-sEVs, G-CSF, and Ly6Clow Mo/M(13 as therapeutic paradigms for the treatment of optic neuropathies.
更多查看译文
关键词
MSC,small extracellular vesicle,macrophage,G-CSF,axon regeneration
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要