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Updated: Aug 14, 2026
Assessment of Sensorimotor Function in Mouse Models of Parkinson's Disease
Published on: June 17, 2013
MPTP induced hemiparkinsonism in monkeys: behavioral, mechanographic, electromyographic and immunohistochemical
A Benazzouz1, C Gross, J Dupont
1Laboratoire de Neurophysiologie, CNRS URA 1200, Université de Bordeaux 2, France.
Abstract:
A single infusion of 1-methyl-4-phenyl-1,2,3,6-tetrahydro-pyridine (MPTP) into the right internal carotid artery of Macaca mulatta monkeys resulted in akinesia and rigidity of the contralateral limb. The immunohistochemical study revealed a dramatic reduction in the number of TH-immunoreactive cells in the substantia nigra of the infused side (70-81%). After unilateral MPTP-treatment movement parameters and EMG activity were altered; the agonist muscle developed increased EMG activity associated with a shift of antagonist muscle activity. These results confirm that hemiparkinsonian monkeys are a valuable model of parkinsonism which can be useful in studies of movement disorder physiology and therapy of Parkinson's disease.
Insights
Unilateral MPTP infusion in monkeys caused contralateral limb akinesia and rigidity, with significant loss of substantia nigra cells. This hemiparkinsonian model offers insights into movement disorders and Parkinson's disease therapy.
Area of Science:
- Neuroscience
- Primate Models
- Movement Disorders
Background:
- Parkinson's disease is a neurodegenerative disorder affecting motor control.
- MPTP (1-methyl-4-phenyl-1,2,3,6-tetrahydro-pyridine) is a neurotoxin known to induce parkinsonian symptoms.
- Hemiparkinsonism models are crucial for studying unilateral motor deficits.
Purpose of the Study:
- To investigate the effects of unilateral MPTP infusion in Macaca mulatta monkeys.
- To establish a primate model of hemiparkinsonism for research.
- To analyze motor and physiological changes following MPTP administration.
Main Methods:
- Single infusion of MPTP into the right internal carotid artery of Macaca mulatta monkeys.
- Immunohistochemical analysis to quantify TH-immunoreactive cells in the substantia nigra.
- Assessment of movement parameters and electromyographic (EMG) activity in contralateral limbs.
Main Results:
- MPTP infusion induced akinesia and rigidity in the contralateral limb.
- A significant reduction (70-81%) in TH-immunoreactive cells was observed in the substantia nigra on the infused side.
- Altered movement parameters and agonist/antagonist muscle EMG activity were noted.
Conclusions:
- Unilateral MPTP administration in monkeys creates a valid hemiparkinsonian model.
- This model is valuable for studying the physiology of movement disorders.
- The model can be utilized for therapeutic strategies targeting Parkinson's disease.
