Cited by 76Parkinson's Disease Mechanisms and TreatmentsNeurotransmitter Receptor Influence on BehaviorAdenosine and Purinergic Signaling

Effects of the adenosine A2A antagonist istradefylline on cognitive performance in rats with a 6-OHDA lesion in prefrontal cortex

Kadowaki Horita, Takako, Kobayashi, Minoru, Mori, Akihisa, Jenner, Peter, Kanda, Tomoyuki·2013·Psychopharmacology

Abstract

Rationale Altered cognitive function is a common feature of both the early and later stages of Parkinson's disease (PD) that involves alterations in cortical dopamine content. Adenosine A2A antagonists, such as istradefylline, improve motor function in PD, but their effect on cognitive impairment has not been determined.Objective The present study investigated whether impairment of working memory due to the loss of dopaminergic input into the prefrontal cortex (PFC) is reversed by administration of istradefylline. We also evaluated whether A2A antagonist administration modulates dopamine levels in the PFC.Methods Bilateral lesions of the dopaminergic input to the PFC were produced in rats using 6-hydroxydopamine (6-OHDA). Cognitive performance was evaluated using an object recognition task and delayed alternation task. The effects of istradefylline, donepezil and methamphetamine on cognitive performance were examined. In addition, the effect of istradefylline on extracellular dopamine levels in the PFC was studied.Results PFC dopamine levels and cognitive performance were significantly reduced by 6-OHDA lesioning. Istradefylline, donepezil and methamphetamine improved cognitive performance of PFC-lesioned rats. Istradefylline increased dopamine levels in the PFC in both normal and PFC-lesioned rats.Conclusions PFC dopaminergic input plays an important role in working memory performance. Blockade of A2A receptors using istradefylline reverses the changes in cognitive function, and this may be due to an increase in PFC dopamine content. Adenosine A2A receptor antagonists not only improve motor performance in PD but may also lead to improved cognition.

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Crossref · 10.1007/s00213-013-3158-x

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Authors
Kadowaki Horita, T., Kobayashi, M., Mori, A., Jenner, P., & Kanda, T.
Affiliations
  • Kyowa Kirin (Japan) (JP)
  • King's College London (GB)
Corresponding author
Kanda, Tomoyuki
Venue
Psychopharmacology
Published
2013-06-10
Volume
230
Issue
3
Pages
345-352
ISSN
  • 0033-3158 (ISSN-L)
  • 1432-2072
OpenAlex
W2025009858
Cited by
74
References
58
Citations by year
2026: 1 · 2025: 2 · 2024: 2 · 2023: 6 · 2022: 6 · 2021: 5 · 2020: 7 · 2019: 3 · 2018: 11 · 2017: 4 · 2016: 5 · 2015: 8 · 2014: 13
FWCI
5.71
Type
journal article
Language
en
Open access
closed
Locations
  • Psychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Adenosine and Purinergic Signaling
Keywords
istradefylline, adenosine A2A receptor antagonists, Parkinson's disease, cognitive impairment, working memory, prefrontal cortex, 6-hydroxydopamine lesion, dopaminergic input, extracellular dopamine, object recognition, delayed alternation, donepezil, methamphetamine
MeSH terms
Donepezil, Animals, Cognition, Cognition Disorders, Disease Models, Animal, Dopamine, Indans, Male, Memory Disorders, Memory, Short-Term, Methamphetamine, Piperidines, Purines, Oxidopamine, Rats, Sprague-Dawley, Prefrontal Cortex, Rats, Adenosine A2 Receptor Antagonists

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