Cited by 697Schizophrenia research and treatmentNeuroscience and Neuropharmacology ResearchNeurotransmitter Receptor Influence on Behavior

Decreased Glutamic Acid Decarboxylase67 Messenger RNA Expression in a Subset of Prefrontal Cortical γ-Aminobutyric Acid Neurons in Subjects With Schizophrenia

Volk, David W., Austin, Mark C., Pierri, Joseph N., Sampson, Allan R., Lewis, David A.·2000·Archives of General Psychiatry

Abstract

BACKGROUND: Markers of gamma-aminobutyric acid (GABA) neurotransmission seem to be altered in the prefrontal cortex (PFC) of subjects with schizophrenia. We sought to determine whether the expression of the messenger RNA (mRNA) for the synthesizing enzyme of GABA, glutamic acid decarboxylase67 (GAD67), is decreased in the PFC of subjects with schizophrenia, whether this change is present in all or only some GABA neurons, and whether long-term treatment with haloperidol decanoate contributes to altered GAD67 mRNA expression. METHODS: Tissue sections from 10 pairs of subjects with schizophrenia and control subjects and 4 pairs of haloperidol-treated and control monkeys were processed for in situ hybridization histochemical analysis with sulfur-35-labeled oligonucleotide probes for GAD67 mRNA and exposed to nuclear emulsion. Within each layer of PFC area 9, neurons expressing a detectable level of GAD67 mRNA were quantified for cell density and the relative level of mRNA expression per cell (grain density per neuron). RESULTS: In subjects with schizophrenia, the density of labeled neurons was significantly (P<.05) decreased by 25% to 35% in cortical layers 3 to 5. In contrast, the mean grain density per labeled neuron did not differ across subject groups. Similar analyses in monkeys revealed no effect of long-term haloperidol treatment on either the density of the labeled neurons or the grain density per labeled neuron. CONCLUSIONS: These findings indicate that in subjects with schizophrenia, GAD67 mRNA expression is relatively unaltered in most PFC GABA neurons but is reduced below a detectable level in a subset of GABA neurons. Altered GABA neurotransmission in this subset may contribute to PFC dysfunction in subjects with schizophrenia.

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Crossref · 10.1001/archpsyc.57.3.237

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  • Post-mortem brain tissues from schizophrenia patients exhibit reduced PV and/or GAD67 mRNA, particularly in prefrontal cortex.

    “In situ hybridization and RT-PCR studies indicate that post-mortem brain tissues from schizophrenia patients exhibit reduced PV and/or GAD67 mRNA, particularly in prefrontal cortex (Akbarian et al., 1995; Volk et al., 2000; Hashimoto et al., 2003, 2008a,b; Mellios et al., 2009).”

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Authors
Volk, D. W., Austin, M. C., Pierri, J. N., Sampson, A. R., & Lewis, D. A.
Affiliations
University of Pittsburgh (US)
Corresponding author
Lewis, David A.
Venue
Archives of General Psychiatry
Published
2000-03-01
Volume
57
Issue
3
Pages
237
ISSN
0003-990X (ISSN-L)
OpenAlex
W2162916231
Cited by
697
References
58
Citations by year
2026: 8 · 2025: 7 · 2024: 12 · 2023: 12 · 2022: 10 · 2021: 17 · 2020: 19 · 2019: 25 · 2018: 16 · 2017: 19 · 2016: 25 · 2015: 43 · 2014: 40 · 2013: 42 · 2012: 34
FWCI
19.07
Type
journal article
Language
en
Open access
closed
Locations
  • Archives of General Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Mental Health (MH43784, MH-00519, MH 45156, P50MH045156)
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
schizophrenia, glutamic acid decarboxylase 67, GABAergic neurons, prefrontal cortex, GABAergic neurotransmission, haloperidol decanoate, antipsychotic treatment effects, prefrontal cortex dysfunction
MeSH terms
Adult, Animals, Female, gamma-Aminobutyric Acid, Glutamate Decarboxylase, Humans, Isoenzymes, Macaca fascicularis, Male, Synaptic Transmission, Neurons, RNA, Messenger, Schizophrenia, Oligonucleotide Probes, Gene Expression, Prefrontal Cortex

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