Cited by 86Schizophrenia research and treatmentNeuroscience and Neuropharmacology ResearchAmino Acid Enzymes and Metabolism

Glutaminase-deficient mice display hippocampal hypoactivity, insensitivity to pro-psychotic drugs and potentiated latent inhibition: relevance to schizophrenia

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Gaisler-Salomon, Inna, Miller, Gretchen M, Chuhma, Nao, Lee, Sooyeon, Zhang, Hong, Ghoddoussi, Farhad, Lewandowski, Nicole, Fairhurst, Stephen +10 more·2009·Neuropsychopharmacology

Abstract

Dysregulated glutamatergic neurotransmission has been strongly implicated in the pathophysiology of schizophrenia (SCZ). Recently, presynaptic modulation of glutamate transmission has been shown to have therapeutic promise. We asked whether genetic knockdown of glutaminase (gene GLS1) to reduce glutamatergic transmission presynaptically by slowing the recycling of glutamine to glutamate, would produce a phenotype relevant to SCZ and its treatment. GLS1 heterozygous (GLS1 het) mice showed about a 50% global reduction in glutaminase activity, and a modest reduction in glutamate levels in brain regions relevant to SCZ pathophysiology, but displayed neither general behavioral abnormalities nor SCZ-associated phenotypes. Functional imaging, measuring regional cerebral blood volume, showed hippocampal hypometabolism mainly in the CA1 subregion and subiculum, the inverse of recent clinical imaging findings in prodromal and SCZ patients. GLS1 het mice were less sensitive to the behavioral stimulating effects of amphetamine, showed a reduction in amphetamine-induced striatal dopamine release and in ketamine-induced frontal cortical activation, suggesting that GLS1 het mice are resistant to the effects of these pro-psychotic challenges. Moreover, GLS1 het mice showed clozapine-like potentiation of latent inhibition, suggesting that reduction in glutaminase has antipsychotic-like properties. These observations provide further support for the pivotal role of altered glutamatergic synaptic transmission in the pathophysiology of SCZ, and suggest that presynaptic modulation of the glutamine-glutamate pathway through glutaminase inhibition may provide a new direction for the pharmacotherapy of SCZ.

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Crossref · 10.1038/npp.2009.58

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  • The gln/glu ratio increase may reflect a deficiency in glutaminase, the enzyme that converts glutamine into glutamate, which results in reduced glutamate levels and increased glutamine levels in the frontal region.

    “This may reflect a deficiency in glutaminase, the enzyme that converts glutamine into glutamate, which results in reduced glutamate levels and increased glutamine levels in the frontal region.61”

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Authors
Gaisler-Salomon, I., Miller, G. M., Chuhma, N., Lee, S., Zhang, H., Ghoddoussi, F., Lewandowski, N., Fairhurst, S., Wang, Y., Conjard-Duplany, A., Masson, J., Balsam, P., Hen, R., Arancio, O., Galloway, M. P., Moore, H. M., Small, S. A., & Rayport, S.
Affiliations
  • New York State Psychiatric Institute (US)
  • Columbia University (US)
  • Wayne State University (US)
  • Inserm (FR)
Corresponding author
  • Small, Scott A
  • Rayport, Stephen
Venue
Neuropsychopharmacology
Published
2009-06-10
Volume
34
Issue
10
Pages
2305-2322
ISSN
  • 0893-133X (ISSN-L)
  • 1740-634X
OpenAlex
W1978403015
Cited by
86
References
116
Citations by year
2026: 1 · 2025: 3 · 2024: 1 · 2023: 4 · 2022: 4 · 2021: 5 · 2020: 4 · 2019: 3 · 2018: 6 · 2017: 4 · 2016: 5 · 2015: 11 · 2014: 3 · 2013: 7 · 2012: 9
FWCI
5.14
Type
journal article
Language
en
Open access
Locations
  • Neuropsychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Max-Planck-Gesellschaft
  • National Institutes of Health (5p50mh066171-05)
  • National Institute on Aging (R01AG025161, P50AG008702)
  • National Institute of Mental Health (P50-MH066171, MH068073, R01MH068073)
  • National Institute on Drug Abuse (R21DA014055, K02DA000356, T32DA016224, R01DA016736, R01DA016373)
  • National Institute of Neurological Disorders and Stroke (R01NS049442, MH068073)
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 › Biochemistry, Genetics and Molecular Biology › Biochemistry › Amino Acid Enzymes and Metabolism
Keywords
glutaminase, GLS1, schizophrenia, glutamatergic neurotransmission, presynaptic glutamate release, amphetamine sensitivity, striatal dopamine release, latent inhibition, clozapine, regional cerebral blood volume, mouse model
MeSH terms
Acoustic Stimulation, Amphetamine, Central Nervous System Stimulants, Analysis of Variance, Animals, Behavior, Animal, Clozapine, Exploratory Behavior, Glutaminase, Hippocampus, Image Processing, Computer-Assisted, Inhibition, Psychological, Ketamine, Magnetic Resonance Imaging, Memory, Short-Term, Mice, Inbred C57BL, Motor Activity, Synaptic Transmission, Magnetic Resonance Spectroscopy, Oxygen, Protons, Reflex, Startle, Antipsychotic Agents, Microdialysis, Mice, Knockout, Excitatory Amino Acid Antagonists, Glutamic Acid, Maze Learning, Excitatory Postsynaptic Potentials, Freezing Reaction, Cataleptic, Mice

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