Skip to main content
Log in

Effect of the mGlu2 positive allosteric modulator CBiPES on dyskinesia, psychosis-like behaviours and parkinsonism in the MPTP-lesioned marmoset

  • Neurology and Preclinical Neurological Studies - Original Article
  • Published:
Journal of Neural Transmission Aims and scope Submit manuscript

Abstract

Advanced Parkinson’s disease (PD) is often complicated by the occurrence of dyskinesia, motor fluctuations and psychosis. To this day, few treatment options are available for each of these phenomena, and they are at times not effective or elicit adverse events, leaving some patients short of therapeutic options. We have recently shown that positive allosteric modulation of metabotropic 2 (mGlu2) receptors with the prototypical positive allosteric modulator (PAM) LY-487,379 is efficacious at alleviating both dyskinesia and psychosis-like behaviours (PLBs), while simultaneously enhancing the anti-parkinsonian action of L-3,4-dihydroxyphenylalanine (L-DOPA), in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-lesioned marmoset. Here, we assessed the effects of CBiPES, a mGlu2 PAM derived from LY-487,379, but with improved pharmacokinetic properties. Six MPTP-lesioned marmosets with reproducible dyskinesia and PLBs were administered L-DOPA in combination with vehicle or CBiPES (0.1, 1 and 10 mg/kg), after which their behaviour was rated. CBiPES 10 mg/kg reduced global dyskinesia by 60% (P < 0.0001), while peak dose dyskinesia was reduced by 66% (P < 0.001), compared to L-DOPA/vehicle. CBiPES 10 mg/kg also diminished global PLBs by 56% (P < 0.0001), while peak dose PLBs were reduced by 64% (P < 0.001), compared to L-DOPA/vehicle. Lastly, CBiPES enhanced the anti-parkinsonian action of L-DOPA, by reducing global parkinsonian disability by 43% (P < 0.01), compared to L-DOPA/vehicle. Our results provide further evidence that mGlu2 positive allosteric modulation may be an approach that could be efficacious for the treatment of dyskinesia, psychosis and motor fluctuations in PD.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3

Similar content being viewed by others

Data availability

Available upon written request to the corresponding author.

References

Download references

Funding

IF holds a scholarship from Parkinson Canada. CK has held a scholarship from Parkinson Canada and holds a scholarship from Fonds de Recherche Québec—Santé. PH has received research support from Parkinson Canada, Parkinson Québec, Fonds de Recherche Québec—Santé, the Weston Brain Institute, the Michael J Fox Foundation for Parkinson’s Research, the Natural Sciences and Engineering Research Council of Canada and Healthy Brains for Healthy Lives.

Author information

Authors and Affiliations

Authors

Contributions

SGN, JCG, PH conceived and designed research. IF, CK, SGN, SB, WK, AH, DB conducted experiments. PH analysed data. PH wrote the manuscript.

Corresponding author

Correspondence to Philippe Huot.

Ethics declarations

Ethics approval

Experiments were approved by McGill University and the Montreal Neurological Institute Animal Care Committees, which are in accordance with the regulations defined by the Canadian Council on Animal Care.

Informed Consent

All authors read, commented on, and approved the manuscript.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Frouni, I., Kwan, C., Nuara, S.G. et al. Effect of the mGlu2 positive allosteric modulator CBiPES on dyskinesia, psychosis-like behaviours and parkinsonism in the MPTP-lesioned marmoset. J Neural Transm 128, 73–81 (2021). https://doi.org/10.1007/s00702-020-02287-8

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00702-020-02287-8

Keywords

Navigation