Cited by 217Treatment of Major DepressionNeuroscience and Neuropharmacology ResearchBipolar Disorder and Treatment

GABA-related transcripts in the dorsolateral prefrontal cortex in mood disorders

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Sibille, Etienne, Morris, Harvey M., Kota, Rama S., Lewis, David A.·2011·International Journal of Neuropsychopharmacology

Abstract

Reduced cortical γ-aminobutyric acid (GABA) levels and altered markers for subpopulations of GABA interneurons have been reported in major depressive disorder (MDD) by in-vivo brain imaging and post-mortem histological studies. Subgroups of GABA interneurons exert differential inhibitory control on principal pyramidal neurons and can be identified based on the non-overlapping expression of the calcium-binding proteins parvalbumin (PV) or calretinin (CR) or the neuropeptide somatostatin (SST). As altered markers of GABAergic functions may also be present in bipolar disorder (BPD), the specificity of particular GABA-related molecular deficits in mood disorders is not known. We used real-time quantitative polymerase chain reaction (qPCR) to assess expression levels of two GABA synthesizing enzymes (glutamate decarboxylase; GAD65 and GAD67) and of three markers of GABA neuron subpopulations (PV, CR, SST) in the dorsolateral prefrontal cortex (DLPFC; Brodmann area 9) in triads (n=19) of control subjects and matched subjects with BPD or MDD. BPD subjects demonstrated significantly reduced PV mRNA, trend level reduction in SST mRNA and no alterations in GAD67, GAD65, or CR mRNA levels; MDD subjects demonstrated reduced SST mRNA expression without alterations in the other transcripts. The characteristic age-related decline in SST expression was not observed in MDD, as low expression was detected across age in MDD subjects. After controlling for age, MDD subjects demonstrated significantly reduced SST mRNA expression. Decreased SST levels in MDD were confirmed at the protein precursor level. Results were not explained by other clinical, demographic or technical parameters. In summary, MDD was characterized by low DLPFC SST, whereas decreased PV mRNA appears to distinguish BPD from MDD.

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Crossref · 10.1017/s1461145710001616

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  • GABAergic signaling is decreased in regions comprising the default mode network, while it is increased in the lateral prefrontal cortex.

    “Meanwhile, GABAergic signaling is decreased in regions comprising the default mode network (DMN), while it is increased in the lateral prefrontal cortex (LPFC). 212 , 213”

    From Major depressive disorder: hypothesis, mechanism, prevention and treatment (2024) · cites this paper as [213]

    The Introduction reports decreased GABA content in occipital and frontal cortices in major depressive disorder, which supports a general decrease but does not identify default mode network regions. The Abstract and Results report reduced GABA-related markers in the dorsolateral prefrontal cortex, not increased signaling there; the study measured transcripts rather than signaling directly. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • The SST mRNA level is specifically decreased in patients with MDD.

    “and the SST mRNA level is specifically decreased in patients with MDD. 213”

    From Major depressive disorder: hypothesis, mechanism, prevention and treatment (2024) · cites this paper as [213]

    In “Alterations in GABA-related transcripts across subject groups,” SST mRNA was significantly lower in MDD than in controls after accounting for age. The word “specifically” overstates the distinction from BPD: BPD showed a nonsignificant downward trend, and SST mRNA did not differ significantly between the MDD and BPD groups. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Loss of SST transcript and SST-related synaptic deficits have been identified in the dlPFC of patients suffering from schizophrenia.

    “Loss of SST transcript and SST-related synaptic deficits have been identified in the dlPFC of patients suffering from schizophrenia.67,68,69”

    From Uncovering the signatures of aging and senescence in the human dorsolateral prefrontal cortex (2026) · cites this paper as [69]

    The Discussion reports robust reductions in SST mRNA in subjects with schizophrenia. The ‘SST in age and disease’ section proposes possible effects of low SST on neural and synaptic development, but does not report identified SST-related synaptic deficits in the dlPFC of those patients. Page numbers are unavailable in our copy. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • SST transcript decline and SST+ neuron density loss have been implicated in various neurological diseases and disorders.

    “both of which have been implicated in various neurological diseases and disorders.”

    From Uncovering the signatures of aging and senescence in the human dorsolateral prefrontal cortex (2026) · cites this paper as [69]

    The 'Decreased SST in MDD' section links reduced SST mRNA expression to major depressive disorder, and 'SST in age and disease' discusses a possible link between low SST and altered mood regulation. The paper does not establish a loss of SST-positive neuron density; its Introduction describes reduced density of calbindin-immunoreactive interneurons, which is not the same measure. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • 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].”

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Research works printed but not linked: 1

  1. [45]45. Schwab SG, Wildenauer DB (2000). Chromosome 22 workshop report. American Journal of Medical Genetics 88, 276-278.

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Authors
Sibille, E., Morris, H. M., Kota, R. S., & Lewis, D. A.
Affiliations
University of Pittsburgh (US)
Corresponding author
Sibille, Etienne
Venue
International Journal of Neuropsychopharmacology
Published
2011-07
Volume
14
Issue
6
Pages
721-734
ISSN
  • 1461-1457 (ISSN-L)
  • 1469-5111
OpenAlex
W2153973179
Cited by
217
References
60
Citations by year
2026: 10 · 2025: 4 · 2024: 12 · 2023: 16 · 2022: 12 · 2021: 20 · 2020: 18 · 2019: 25 · 2018: 10 · 2017: 10 · 2016: 16 · 2015: 17 · 2014: 20 · 2013: 12 · 2012: 7
FWCI
10.54
Type
journal article
Language
en
Open access
Locations
  • The International Journal of Neuropsychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (MH077159, MH45156)
  • National Institute of Mental Health (MH084060, MH 45156, MH077159, R01MH067234, R01MH077159, P50MH045156, K02MH084060, R01MH079299)
Topics
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Health Sciences › Medicine › Psychiatry and Mental health › Bipolar Disorder and Treatment
Keywords
GABAergic interneurons, dorsolateral prefrontal cortex, major depressive disorder, bipolar disorder, mood disorders, somatostatin, parvalbumin, calretinin, glutamic acid decarboxylase, GAD65, GAD67, gene expression, age-related decline
MeSH terms
Adult, Age Factors, Aged, Bipolar Disorder, Female, gamma-Aminobutyric Acid, Humans, Male, Middle Aged, Nerve Tissue Proteins, Neurons, Parvalbumins, Protein Precursors, RNA, Messenger, Somatostatin, Biomarkers, Down-Regulation, Prefrontal Cortex, Mood Disorders, Reverse Transcriptase Polymerase Chain Reaction

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