Cited by 94Neuroscience and Neuropharmacology ResearchParkinson's Disease Mechanisms and TreatmentsNeurological disorders and treatments

Altered AMPA receptor expression with treadmill exercise in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-lesioned mouse model of basal ganglia injury

VanLeeuwen, Jon‐Eric, Petzinger, Giselle M., Walsh, John P., Akopian, Garnik K., Vuckovic, Marta, Jakowec, Michael W.·2010·Journal of Neuroscience Research

Abstract

Dopamine depletion leads to impaired motor performance and increased glutamatergic-mediated hyperexcitability of medium spiny neurons in the basal ganglia. Intensive treadmill exercise improves motor performance in both saline treatment and the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) mouse model of Parkinson's disease. In the present study, we investigated the effect of high-intensity treadmill exercise on changes in alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor (AMPAR) subunit expression, because these receptor channels confer the majority of fast excitatory neurotransmission in the brain, and their subunit composition provides a key mechanism for regulating synaptic strength and synaptic neuroplasticity and is important in modulating glutamatergic neurotransmission. Within the dorsolateral striatum of MPTP mice, treadmill exercise increased GluR2 subunit expression, with no significant effect on GluR1. Furthermore, neurophysiological studies demonstrated a reduction in the size of excitatory postsynaptic currents (EPSCs) in striatal medium spiny neurons (as determined by the input-output relationship), reduced amplitude of spontaneous EPSCs, and a loss of polyamine-sensitive inward rectification, all supportive of an increase in heteromeric AMPAR channels containing the GluR2 subunit. Phosphorylation of GluR2 at serine 880 in both saline-treated and MPTP mice suggests that exercise may also influence AMPAR trafficking and thus synaptic strength within the striatum. Finally, treadmill exercise also altered flip isoforms of GluR2 and GluR1 mRNA transcripts. These findings suggest a role for AMPARs in mediating the beneficial effects of exercise and support the idea that adaptive changes in GluR2 subunit expression may be important in modulating experience-dependent neuroplasticity of the injured basal ganglia.

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Crossref · 10.1002/jnr.22216

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Authors
VanLeeuwen, J., Petzinger, G. M., Walsh, J. P., Akopian, G. K., Vuckovic, M., & Jakowec, M. W.
Affiliations
University of Southern California (US)
Corresponding author
Petzinger, Giselle M.
Venue
Journal of Neuroscience Research
Publisher
Wiley
Published
2009-09-10
Volume
88
Issue
3
Pages
650-668
ISSN
  • 0360-4012 (ISSN-L)
  • 1097-4547
OpenAlex
W1971168591
Cited by
94
References
87
Citations by year
2026: 2 · 2025: 4 · 2024: 3 · 2023: 4 · 2022: 3 · 2021: 4 · 2020: 10 · 2019: 7 · 2018: 4 · 2017: 13 · 2016: 5 · 2015: 8 · 2014: 4 · 2013: 9 · 2012: 5
FWCI
1.93
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Neuroscience Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute on Aging (R01 AG 21937, R01AG021937)
  • National Institute of Neurological Disorders and Stroke (R01NS044327, R01 NS44327-1)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Health Sciences › Medicine › Neurology › Neurological disorders and treatments
Keywords
AMPA receptors, GluR2 subunit, GluR1 subunit, treadmill exercise, MPTP mouse model, Parkinson's disease, basal ganglia lesions, dorsolateral striatum, medium spiny neurons, excitatory postsynaptic currents, inward rectification, neuroplasticity, dopamine depletion
MeSH terms
Animals, Basal Ganglia, Corpus Striatum, Disease Models, Animal, Dopamine, Male, Membrane Potentials, Mice, Inbred C57BL, Neurons, Parkinson Disease, Secondary, Physical Conditioning, Animal, Random Allocation, RNA, Messenger, Synapses, 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine, Receptors, AMPA, Excitatory Postsynaptic Potentials, Protein Isoforms, Mice

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