Abstract

1. 1. The feasibility of ameliorating the motor deficits in aged rats was evaluated in animals receiving polymer-encapsulated PC12 cells. 2. 2. Motor coordination and balance was evaluated in young (5–6 month) and aged (24–25 month) rats. Compared to the young animals, the aged animals fell more rapidly from a rotating rod and were unable to maintain their balance on a series of wooden beams of varying widths. 3. 3. Following baseline testing, aged animals received either no implant, empty capsules or PC12 cellloaded capsules implanted bilaterally into the striatum. 4. 4. Three weeks following surgery, animals were re-tested and a significant improvement in balance on the rotorod and wooden beams was observed in those aged animals receiving PC12 cell-loaded capsules. No improvements or decrements in performance were observed in those animals receiving empty. Histological analysis revealed the presence of surviving tyrosine hydroxylaseposidve PC12 cells randomly distributed within the capsules.

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