Cited by 190Treatment of Major DepressionNeuropeptides and Animal PhysiologyNeurotransmitter Receptor Influence on Behavior

Reduced somatostatin in subgenual anterior cingulate cortex in major depression

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Tripp, Adam, Kota, Rama S., Lewis, David A., Sibille, Etienne·2011·Neurobiology of Disease

Abstract

Converging evidence suggests a central role for dysfunction of the subgenual anterior cingulate cortex (sgACC) in the pathophysiology of major depressive disorder (MDD). Underlying mechanisms may include altered GABAergic function. Expression of somatostatin (SST), an inhibitory neuropeptide localized to a subset of GABA neurons, has been shown to be lower in the dorsolateral prefrontal cortex of male MDD subjects. Here, to investigate whether alterations in SST may contribute to sgACC dysfunction in MDD, and whether the alterations display sex-specificity, we measured sgACC SST at the mRNA and precursor peptide levels in a large cohort of subjects with MDD. SST mRNA levels were analyzed by quantitative PCR (qPCR) in the postmortem sgACC from male (n=26) and female (n=25) subjects with MDD and sex-matched subjects with no psychiatric diagnosis (n=51). Prepro-SST protein levels were assessed in a subset of subjects (n=42 pairs) by semi-quantitative Western blot. The mRNA expression of SST was significantly reduced by 38% in female subjects and by 27% in male subjects with MDD. The characteristic age-related decline in SST expression was observed in control (Pearson R=-0.357, p=0.005) but not MDD (R=-0.104, p=0.234) subjects, as low expression was detected across ages in MDD subjects. Protein expression was similarly reduced by 19% in both MDD groups, and findings were more robust in female (p=0.0056) than in males (p=0.0373) compared to respective controls. In conclusion, low SST represents a robust pathological finding in MDD. Specifically, alterations in SST signaling and/or SST-bearing GABA neurons may represent a critical pathophysiological entity that contributes to sgACC dysfunction and that matches to the high female vulnerability to develop MDD.

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Crossref · 10.1016/j.nbd.2011.01.014

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Authors
Tripp, A., Kota, R. S., Lewis, D. A., & Sibille, E.
Affiliations
University of Pittsburgh (US)
Corresponding author
Sibille, Etienne
Venue
Neurobiology of Disease
Publisher
Elsevier BV
Published
2011-04
Volume
42
Issue
1
Pages
116-124
ISSN
0969-9961 (ISSN-L)
OpenAlex
W2007197177
Cited by
190
References
54
Citations by year
2026: 11 · 2025: 8 · 2024: 16 · 2023: 16 · 2022: 14 · 2021: 25 · 2020: 13 · 2019: 22 · 2018: 10 · 2017: 7 · 2016: 12 · 2015: 13 · 2014: 8 · 2013: 9 · 2012: 4
FWCI
5.39
Type
journal article
Language
en
Open access
Locations
  • Neurobiology of Disease (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Institute of Mental Health (P50MH084053, MH084060, MH084053, MH 45156, MH077159, R01MH077159, P50MH045156, K02MH084060)
Topics
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
somatostatin, subgenual anterior cingulate cortex, major depressive disorder, sex differences, GABAergic neurons, postmortem brain, age-related decline, depression pathophysiology
MeSH terms
Adolescent, Adult, Aged, Depressive Disorder, Major, Major Depressive Disorder, Female, Gyrus Cinguli, Humans, Male, Middle Aged, Neural Pathways, Protein Precursors, Somatostatin, Cohort Studies, Down-Regulation, Young Adult

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