| MSCs | Mesenchymal stem cells |
| sEVs | Small extracellular vesicles |
| CM | Conditioned medium |
| SEC | Size-exclusion chromatography |
| DG-UC | Density gradient ultracentrifugation |
| MVs | Microvesicles |
| HUVECs | Human umbilical vein endothelial cells |
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