Abstract
Experiments in MPTP-treated non-human primates testing potential antiparkinsonian action have shown both, beneficial and adverse effects of gutamate receptor antagonists. To investigate this matter further, the novel competitive NMDA antagonist CGP40.116 was administered systemically to three adult MPTP-treated marmosets. When coadministered subcutaneously with a subthreshold dose of L-DOPA, 2 mg/kg, CGP40.116 25–250 μg/kg, increased locomotor activity. However, when administered alone, CGP40.116 had no effect on locomotor activity.
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