Cited by 151Schizophrenia research and treatmentNeuroscience and Neuropharmacology ResearchNeurotransmitter Receptor Influence on Behavior

A single application of MK801 causes symptoms of acute psychosis, deficits in spatial memory, and impairment of synaptic plasticity in rats

Manahan‐Vaughan, Denise, von Haebler, Dorothea, Winter, Christine, Juckel, Georg, Heinemann, Uwe·2008·Hippocampus

Abstract

Schizophrenia is mostly a progressive psychiatric illness. Although cognitive changes in chronic schizophrenia have been investigated, little is known about the consequences of a single psychotic episode on memory mechanisms and formation. We investigated changes in hippocampal long-term potentiation (LTP) and spatial memory in a rat model of an acute psychotic episode. Application of NMDA receptor antagonists, such as MK801 (dizolcilpine) in rats, have been shown to give rise to an acute and short-lasting behavioral state, which mirrors many symptoms of schizophrenia. Furthermore, NMDA antagonist-intake in humans elicits symptoms of schizophrenia such as hallucinations, delusions, and affective blunting. We therefore treated animals with a single systemic injection of MK801 (5 mg/kg). Increased stereotypy, locomotion, and ataxia were evident immediately after MK801-treatment, with effects disappearing within 24 h. MK801-treatment caused a disruption of prepulse inhibition of the acoustic startle reflex, 1 day but not 7 or 28 days after treatment. These effects were consistent with the occurrence of an acute psychotic episode. LTP was profoundly impaired in freely moving rats 7 days after MK801 application. Four weeks after treatment, a slight recovery of LTP was seen, however marked deficits in long-term spatial memory were evident. These data suggest that treatment with MK801 to generate an acute psychotic episode in rats, gives rise to grave disturbances in synaptic plasticity and is associated with lasting impairments with the ability to form spatial memory.

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Crossref · 10.1002/hipo.20367

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  • NMDA-receptor antagonists such as MK801, ketamine, and phencyclidine cause symptoms similar to anti-NMDA-receptor encephalitis, including psychotic behaviour, signs of involvement of dopaminergic pathways, and autonomic dysfunction.

    “Consistent with this antibody-induced decrease in the numbers of NMDA receptors, several NMDA-receptor antagonists such as MK801, ketamine, and phencyclidine cause symptoms similar to anti-NMDA-receptor encephalitis, including psychotic behaviour,21,22 signs of involvement of dopaminergic pathways (rigidity, dystonia, orofacial movements, tremor)22–25 and autonomic dysfunction (cardiac dysrhythmia”

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Authors
Manahan‐Vaughan, D., von Haebler, D., Winter, C., Juckel, G., & Heinemann, U.
Affiliations
  • Ruhr University Bochum (DE)
  • Humboldt-Universität zu Berlin (DE)
Corresponding author
Manahan‐Vaughan, Denise
Venue
Hippocampus
Publisher
Wiley
Published
2007-10-09
Volume
18
Issue
2
Pages
125-134
ISSN
  • 1050-9631 (ISSN-L)
  • 1098-1063
OpenAlex
W1995336243
Cited by
149
References
68
Citations by year
2026: 1 · 2025: 4 · 2024: 4 · 2023: 7 · 2022: 3 · 2021: 8 · 2020: 5 · 2019: 7 · 2018: 5 · 2017: 8 · 2016: 8 · 2015: 12 · 2014: 16 · 2013: 10 · 2012: 15
FWCI
4.83
Type
journal article
Language
en
Open access
closed
Locations
  • Hippocampus (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
MK-801, NMDA receptor antagonism, acute psychosis, schizophrenia model, long-term potentiation, synaptic plasticity, spatial memory, prepulse inhibition, acoustic startle response, stereotypy, locomotion, ataxia
MeSH terms
Acute Disease, Animals, Ataxia, Defecation, Disease Models, Animal, Grooming, Male, Memory Disorders, Motor Activity, Neuronal Plasticity, Psychotic Disorders, Schizophrenia, Smell, Reflex, Startle, Receptors, N-Methyl-D-Aspartate, Dizocilpine Maleate, Rats, Wistar, Long-Term Potentiation, Excitatory Amino Acid Antagonists, Maze Learning, Dentate Gyrus, Rats

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