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The mGluR5 negative allosteric modulator dipraglurant reduces dyskinesia in the MPTP macaque model. | LitMetric

The mGluR5 negative allosteric modulator dipraglurant reduces dyskinesia in the MPTP macaque model.

Mov Disord

Motac neuroscience, Manchester, UK; Université de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux, France; CNRS, Institut des Maladies Neurodégénératives, UMR 5293, Bordeaux, France; Service de Neurologie, CHU de Bordeaux, Pessac, France; Institute of Laboratory Animal Sciences, China Academy of Medical Sciences, Beijing, China.

Published: July 2014

AI Article Synopsis

Article Abstract

Background: Blocking metabotropic glutamate receptor type 5 (mGluR5) has been proposed as a target for levodopa-induced dyskinesias (LID) in Parkinson's disease (PD). We assessed the effect on LID of dipraglurant, a potent selective mGluR5 receptor negative allosteric modulator in the gold-standard LID macaque model.

Methods: Dipraglurant (3, 10, and 30 mg/kg, by mouth) was tested in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) macaque model of LID in a four-way crossover, single-dose, controlled study (n = 8).

Results: Dipraglurant inhibited dyskinesias in the LID macaque model, with best effect reached at 30 mg/kg dose with no alteration of levodopa efficacy.

Conclusion: Acute challenges of dipraglurant were efficacious on choreic and dystonic LID in the MPTP-macaque model. Dipraglurant pharmacokinetic variables were similar to those of levodopa, suggesting that both drugs can be co-administered simultaneously in further studies.

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http://dx.doi.org/10.1002/mds.25920DOI Listing

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