Exosomes from mesenchymal stromal cells (MSCs) are endosome-derived vesicles that have been shown to enhance functional recovery in rodent models of stroke.
Objective:
Building on these findings, we tested exosomes as a treatment in monkeys with cortical injury.
Methods:
After being trained on a task of fine motor function of the hand, monkeys received a cortical injury to the hand representation in primary motor cortex. Twenty-four hours later and again 14 days after injury, monkeys received exosomes or vehicle control. Recovery of motor function was followed for 12 weeks.
Results:
Compared to monkeys that received vehicle, exosome treated monkeys returned to pre-operative grasp patterns and latency to retrieve a food reward in the first three-five weeks of recovery.
Conclusions:
These results provide evidence that in monkeys exosomes delivered after cortical injury enhance recovery of motor function.
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