A Phase Ib Randomized Controlled Study to Evaluate the Effectiveness of a Single-Dose of the NR2B Selective N-Methyl-d-Aspartate Antagonist MK-0657 on Levodopa-Induced Dyskinesias and Motor Symptoms in Patients With Parkinson Disease
| Autor: | Christopher Lines, Kerry Budd, Ryan Vargo, Ralph S. Mazenko, Leo Verhagen Metman, Christopher Assaid, W. Joseph Herring, Aaron Ellenbogen |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Male
Dyskinesia Drug-Induced Levodopa Placebo Receptors N-Methyl-D-Aspartate 030226 pharmacology & pharmacy law.invention Antiparkinson Agents 03 medical and health sciences 0302 clinical medicine Double-Blind Method Piperidines Randomized controlled trial Pharmacokinetics law medicine Humans Pharmacology (medical) Aged Pharmacology Cross-Over Studies Dyskinesias business.industry Area under the curve Parkinson Disease Middle Aged Crossover study Confidence interval Pyrimidines Treatment Outcome Dyskinesia Anesthesia Drug Therapy Combination Female Neurology (clinical) medicine.symptom business 030217 neurology & neurosurgery medicine.drug |
| Zdroj: | Clinical Neuropharmacology. 40:255-260 |
| ISSN: | 1537-162X 0362-5664 |
| Popis: | Objectives Blockade of N-methyl-D-aspartate receptors containing the NR2B subunit has been shown to be therapeutic in animal models of Parkinson disease (PD). However, findings with investigational NR2B receptor antagonists in PD patients have been mixed. The objective of this study was to evaluate the effects of the NR2B selective N-methyl-D-aspartate receptor antagonist MK-0657 on levodopa-induced dyskinesias and motor symptoms in PD patients. Methods A randomized, double-blind, single-dose, 2-period crossover study was conducted in 22 patients with PD and levodopa-induced peak-dose dyskinesias. Patients received oral MK-0657 (7 mg) or placebo, in randomized order, on each of 2 test days. On both days, levodopa was administered as a 2-hour intravenous infusion at greater than or equal to 1 mg/kg per hour with frequent assessments of dyskinesia, motor function, and pharmacokinetics. Results MK-0657 7 mg had no significant effect on dyskinesias (difference versus placebo in modified Abnormal Involuntary Movement Scale mean change from baseline area under the curve over 5 hours, -2.3; 95% confidence interval, -5.1 to 0.4) or motor function (difference versus placebo in Unified Parkinson's Disease Rating Scale Part III mean change from baseline area under the curve over 5 hours, 13.9; 95% confidence interval, -1.7 to 29.5). MK-0657 7 mg achieved the target mean maximum plasma concentration of 400 nM. Conclusions These data suggest that a single dose of MK-0657 7 mg is not effective in improving levodopa-induced dyskinesias and motor symptoms in PD patients. Clinical trial registration clinicaltrials.gov NCT00505843. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|