Funding agencies: This research was supported by an unrestricted grant from Motac Holding, Inc.
Levodopa improves motor deficits but can further disrupt cognition in a macaque parkinson model
Article first published online: 12 DEC 2012
Copyright © 2012 Movement Disorders Society
Volume 28, Issue 5, pages 663–667, May 2013
How to Cite
Schneider, J. S., Pioli, E. Y., Jianzhong, Y., Li, Q. and Bezard, E. (2013), Levodopa improves motor deficits but can further disrupt cognition in a macaque parkinson model. Mov. Disord., 28: 663–667. doi: 10.1002/mds.25258
Relevant conflicts of interest/financial disclosures: Nothing to report.
Full financial disclosures and author roles may be found in the online version of this article.
- Issue published online: 15 MAY 2013
- Article first published online: 12 DEC 2012
- Manuscript Accepted: 27 SEP 2012
- Manuscript Revised: 12 SEP 2012
- Manuscript Received: 8 AUG 2012
Levodopa effectively relieves motor symptoms in Parkinson's disease (PD), but has had inconsistent effects on cognition, even worsening some aspects of cognitive functioning. Therefore, remediation of PD cognitive deficits is a major unmet need. However, drug development efforts have been hampered by lack of an animal model in which motor and cognitive deficits can be examined simultaneously.
Cynomolgus monkeys were trained to perform cognitive tasks and then chronically exposed to MPTP to slowly produce cognitive and motor deficits of parkinsonism.
Administration of L-dopa to these animals dose dependently improved motor functioning, but did not significantly improve cognitive performance. At doses that maximally improved motor function, additional cognitive deficits were observed. The present model of MPTP-induced parkinsonism recapitulates important motor and cognitive aspects of PD. Results with L-dopa mirror data derived from PD patients.
This model should allow more efficient testing of potential PD therapeutics to evaluate motor and cognitive functions simultaneously. © 2012 Movement Disorder Society