Cited by 430Treatment of Major DepressionNeuroscience and Neuropharmacology ResearchNeurotransmitter Receptor Influence on Behavior

GABAergic Neurons Immunoreactive for Calcium Binding Proteins are Reduced in the Prefrontal Cortex in Major Depression

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Rajkowska, Grazyna, O'Dwyer, Gillian, Teleki, Zsofia, Stockmeier, Craig A, Miguel-Hidalgo, Jose Javier·2007·Neuropsychopharmacology

Abstract

Post-mortem morphometric studies report reductions in the average density and size of cortical neurons in the dorsolateral prefrontal cortex (dlPFC) and orbitofrontal cortex (ORB) in major depressive disorder (MDD). The contribution of specific neuronal phenotypes to this general pathology in depression is still unclear. Post-mortem sections from the dlPFC and ORB regions of 14 subjects with MDD and 11 controls were immunostained to visualize calbindin-immunoreactive (CB-IR) and parvalbumin-immunoreactive (PV-IR) presumptive GABAergic neurons. A three-dimensional cell counting probe was used to assess the cell packing density and size of CB-IR neurons in layers II+IIIa and PV-IR neurons in layers III-VI. The density of CB-IR neurons was significantly reduced by 50% in depression in the dlPFC and there was a trend toward reduction in the ORB. The size of CB-IR somata was significantly decreased (18%) in depression in the dlPFC with a trend toward reduction in the ORB. In contrast, there was no difference in the density of PV-IR neurons between the depressed and control groups in the dlPFC. The size of PV-IR neuronal soma was unchanged in depressed compared to control subjects in either dlPFC or ORB. In depression, subpopulations of GABAergic neurons may be affected differently in dlPFC and ORB. A significant reduction in the density and size of GABAergic interneurons immunoreactive for calcium binding proteins was found predominantly in the dlPFC region. These cellular changes are consistent with recent neuroimaging studies revealing a reduction in the cortical levels of GABA in depression.

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Crossref · 10.1038/sj.npp.1301234

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  • The density of nonpyramidal neurons was decreased in the ACC and hippocampus in BD, and in the dorsal anterolateral PFC (BA9) of MDD.

    “the density of nonpyramidal neurons was decreased in the ACC and hippocampus in BD (Benes et al. 2001; Todtenkopf et al. 2005), and in the dorsal anterolateral PFC (BA9) of MDD (Rajkowska et al. 2007).”

    From Brain structural and functional abnormalities in mood disorders: implications for neurocircuitry models of depression (2008) · cites this paper as Rajkowska et al. 2007

    The Area 9 results report a 50% lower density of calbindin-immunoreactive interneurons in MDD, supporting the BA9 portion of the claim. But the same results find no density difference for parvalbumin-immunoreactive neurons, so the finding does not establish a decrease in nonpyramidal neurons generally. The ACC and hippocampus findings in BD are attributed to other citations in the sentence. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • The reduction in GABA in the dorsal anterolateral PFC is compatible with the report of reduced GABA-ergic neurons in this region (BA9) in MDD.

    “the reduction in GABA in the dorsal anterolateral PFC is compatible with the report of reduced GABA-ergic neurons in this region (BA9) in MDD (Rajkowska et al. 2007).”
  • GABA deficits may contribute to depression symptoms.

    “Immunohistochemical analysis of interneurons and transcripts of interneuron-associated proteins are decreased within the PFC and anterior cingulate cortex in human MDD brain tissue and in chronically stressed rats, suggesting that deficits in GABA levels may contribute to the symptoms of depression [205][206][207][208].”
  • Interneuron markers and interneuron-associated transcripts are decreased in the prefrontal cortex and anterior cingulate cortex in human MDD brain tissue and chronically stressed rats.

    “Immunohistochemical analysis of interneurons and transcripts of interneuron-associated proteins are decreased within the PFC and anterior cingulate cortex in human MDD brain tissue and in chronically stressed rats, suggesting that deficits in GABA levels may contribute to the symptoms of depression [205][206][207][208].”
  • GABAergic interneurons, especially the PV+ subtype, have been implicated in neuropsychiatric disease.

    “GABAergic interneurons, especially the PV+ subtype, play an important role in the regulation of neuronal oscillations in the brain (24–27) and have also been implicated in neuropsychiatric disease (66; 67).”

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Authors
Rajkowska, G., O'Dwyer, G., Teleki, Z., Stockmeier, C. A., & Miguel-Hidalgo, J. J.
Affiliations
University of Mississippi Medical Center (US)
Venue
Neuropsychopharmacology
Published
2006-10-25
Volume
32
Issue
2
Pages
471-482
ISSN
  • 0893-133X (ISSN-L)
  • 1740-634X
OpenAlex
W2026826561
Cited by
430
References
97
Citations by year
2026: 9 · 2025: 16 · 2024: 22 · 2023: 26 · 2022: 17 · 2021: 36 · 2020: 24 · 2019: 41 · 2018: 19 · 2017: 33 · 2016: 32 · 2015: 19 · 2014: 25 · 2013: 13 · 2012: 27
FWCI
6.90
Type
journal article
Language
en
Open access
Locations
  • Neuropsychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (5p20rr017701-10)
  • National Institute of Mental Health (R01MH067996, MH67996, MH 61578, MH60451, MH63187, R01MH063187, R01MH061578, P50MH060451)
  • National Center for Research Resources (P20-RR-017701, RR 17701)
Topics
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
major depressive disorder, GABAergic interneurons, dorsolateral prefrontal cortex, orbitofrontal cortex, neuronal density, neuronal soma size, calcium-binding proteins
MeSH terms
Adult, Aged, Calcium-Binding Proteins, Cell Count, Depressive Disorder, Major, Major Depressive Disorder, Female, gamma-Aminobutyric Acid, Humans, Immunohistochemistry, Interneurons, Male, Middle Aged, Parvalbumins, Biomarkers, Down-Regulation, Prefrontal Cortex, Cell Size, Calbindins, S100 Calcium Binding Protein G

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