Figure 4. Motor functions are protected by GDNF-MSCs.

The left and right upper limb motor performance was recorded and the time spent to take the food treat was analyzed. (A) Before cell transplantation; (B) After transplantation but before MPTP treatment; (C) After transplantation and MPTP treatment. No difference was noticed in motor functions after transplantation. However, following MPTP treatment, all the 6 monkeys spent more time to get the food. All the 4 monkeys that had received GDNF-MSCs in the right hemisphere showed faster movement in the left upper limb (C). *P < 0.05, **P < 0.01.