Cited by 47Parkinson's Disease Mechanisms and TreatmentsNeurological disorders and treatmentsNeurotransmitter Receptor Influence on Behavior

Striatal Akt/GSK3 signaling pathway in the development of L-Dopa-induced dyskinesias in MPTP monkeys

Morissette, Marc, Samadi, Pershia, Tahar, Abdallah Hadj, Bélanger, Nancy, Di Paolo, Thérèse·2010·Progress in Neuro-Psychopharmacology and Biological Psychiatry

Abstract

L-Dopa treatment, the gold standard therapy for Parkinson's disease, is hampered by motor complications such as dyskinesias. Recently, impairment of striatal Akt/GSK3 signaling was proposed to play a role in the mechanisms implicated in development of L-Dopa-induced dyskinesias in a rodent model of Parkinson's disease. The present experiment investigated in 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) monkeys, the effects on Akt/GSK3 of chronic L-Dopa treatment inducing dyskinesias compared to L-Dopa with CI-1041 (NMDA receptor antagonist) or a low dose of cabergoline (dopamine D2 receptor agonist) preventing dyskinesias. The extensive dopamine denervation induced by MPTP was associated with a decrease by about half of phosphorylated Akt(Ser473) levels in posterior caudate nucleus, anterior and posterior putamen; smaller changes were observed for phosphorylated Akt(Thr308) levels that did not reach statistical significance. Dopamine depletion reduced phosphorylated GSK3beta(Ser9) levels, mainly in posterior putamen whereas pGSK3beta(Tyr216) and pGSK3alpha(Ser21) were unchanged. In posterior caudate nucleus, anterior and posterior putamen of dyskinetic L-Dopa-treated MPTP monkeys, pAkt(Ser473) and pGSK3beta(Ser9) were elevated whereas L-Dopa+cabergoline treated MPTP monkeys without dyskinesias had lower values in posterior striatum as vehicle-treated MPTP monkeys. In non-dyskinetic MPTP monkeys treated with L-Dopa+CI-1041, putamen pAkt(Ser473) and pGSK3beta(Ser9) levels remained elevated as in dyskinetic monkeys while in posterior caudate nucleus, these levels were low as vehicle-treated and lower than L-Dopa treated MPTP monkeys. Extent of phosphorylation of Akt and GSK3beta in putamen correlated positively with dyskinesias scores of MPTP monkeys; these correlations were higher with dopaminergic drugs (L-Dopa, cabergoline) suggesting implication of additional mechanisms and/or signaling molecules in the NMDA antagonist antidyskinetic effect. In conclusion, our results showed that in MPTP monkeys, loss of striatal dopamine decreased Akt/GSK3 signaling and that increased phosphorylation of Akt and GSK3beta was associated with L-Dopa-induced dyskinesias.

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Crossref · 10.1016/j.pnpbp.2009.12.011

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Authors
Morissette, M., Samadi, P., Tahar, A. H., Bélanger, N., & Di Paolo, T.
Affiliations
  • Centre hospitalier universitaire de Québec (CA)
  • Université Laval (CA)
Venue
Progress in Neuro-Psychopharmacology and Biological Psychiatry
Publisher
Elsevier BV
Published
2010-04
Volume
34
Issue
3
Pages
446-454
ISSN
0278-5846 (ISSN-L)
OpenAlex
W2070775710
Cited by
47
References
52
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2022: 2 · 2021: 2 · 2020: 3 · 2019: 3 · 2018: 3 · 2017: 3 · 2016: 2 · 2015: 2 · 2014: 6 · 2013: 7 · 2012: 4
FWCI
2.35
Type
journal article
Language
en
Open access
closed
Locations
  • Progress in Neuro-Psychopharmacology and Biological Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Applied Materials
  • Canadian Institutes of Health Research
Topics
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Health Sciences › Medicine › Neurology › Neurological disorders and treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
Parkinson's disease, GSK3β phosphorylation, Akt phosphorylation, dopamine depletion, NMDA receptor antagonists, cabergoline, caudate nucleus, putamen, antidyskinetic effect, dopamine D2 receptor agonist
MeSH terms
Cabergoline, Animals, Antiparkinson Agents, Benzoxazoles, Corpus Striatum, Disease Models, Animal, Drug Interactions, Dyskinesia, Drug-Induced, Enzyme Inhibitors, Ergolines, Female, Levodopa, Macaca fascicularis, Phosphorylation, Piperidines, Serine, Statistics as Topic, Signal Transduction, Parkinsonian Disorders, Glycogen Synthase Kinase 3, Oncogene Protein v-akt

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