IV infusion of MSCs in the chronic phase of SCI improved locomotor function.
Some infused MSCs distributed to the injured spinal cord.
IV MSC infusion rapidly reduced intravenous dye leakage into the injured spinal cord.
RECA-1 and PDGFR β positive microvasculature was more prevalent in the MSC-group.
MSC-group showed greater anatomical repair in the chronic SCI.