Targeted Delivery of RGD-CD146⁺CD271⁺ Human Umbilical Cord Mesenchymal Stem Cell-Derived Exosomes Promotes Blood–Spinal Cord Barrier Repair after Spinal Cord Injury

Specific subpopulations of CD146+CD271+ umbilical cord MSCs were isolated, from which engineered exosomes with targeted neovascularization function were obtained through gene transfection.