Cited by 325MicroRNA in disease regulationTreatment of Major DepressionTryptophan and brain disorders

MicroRNA Expression Is Down-Regulated and Reorganized in Prefrontal Cortex of Depressed Suicide Subjects

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Smalheiser, Neil R., Lugli, Giovanni, Rizavi, Hooriyah S., Torvik, Vetle I., Turecki, Gustavo, Dwivedi, Yogesh·2012·PLoS ONE

Abstract

BACKGROUND: Recent studies suggest that alterations in expression of genes, including those which regulate neural and structural plasticity, may be crucial in the pathogenesis of depression. MicroRNAs (miRNAs) are newly discovered regulators of gene expression that have recently been implicated in a variety of human diseases, including neuropsychiatric diseases. METHODOLOGY/PRINCIPAL FINDINGS: The present study was undertaken to examine whether the miRNA network is altered in the brain of depressed suicide subjects. Expression of miRNAs was measured in prefrontal cortex (Brodmann Area 9) of antidepressant-free depressed suicide (n = 18) and well-matched non-psychiatric control subjects (n = 17) using multiplex RT-PCR plates. We found that overall miRNA expression was significantly and globally down-regulated in prefrontal cortex of depressed suicide subjects. Using individual tests of statistical significance, 21 miRNAs were significantly decreased at p = 0.05 or better. Many of the down-regulated miRNAs were encoded at nearby chromosomal loci, shared motifs within the 5'-seeds, and shared putative mRNA targets, several of which have been implicated in depression. In addition, a set of 29 miRNAs, whose expression was not pairwise correlated in the normal controls, showed a high degree of co-regulation across individuals in the depressed suicide group. CONCLUSIONS/SIGNIFICANCE: The findings show widespread changes in miRNA expression that are likely to participate in pathogenesis of major depression and/or suicide. Further studies are needed to identify whether the miRNA changes lead to altered expression of prefrontal cortex mRNAs, either directly (by acting as miRNA targets) or indirectly (e.g., by affecting transcription factors).

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  1. [44]Sadikovic B Pearson R Meng L Beaudet A 2011 Identification of miRNAs and target mRNAs with degulated expression in schizophrenia and bipolar brains. 12th International Congress of Human Genetics 586T 219
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Authors
Smalheiser, N. R., Lugli, G., Rizavi, H. S., Torvik, V. I., Turecki, G., & Dwivedi, Y.
Affiliations
  • University of Illinois Chicago (US)
  • University of Illinois Urbana-Champaign (US)
  • McGill University (CA)
Corresponding author
Dwivedi, Yogesh
Venue
PLoS ONE
Published
2012-03-09
Volume
7
Issue
3
Pages
e33201
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2050613411
Cited by
324
References
58
Citations by year
2026: 5 · 2025: 15 · 2024: 18 · 2023: 19 · 2022: 22 · 2021: 35 · 2020: 24 · 2019: 22 · 2018: 26 · 2017: 30 · 2016: 35 · 2015: 26 · 2014: 20 · 2013: 16 · 2012: 9
FWCI
7.54
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
  • American Foundation for Suicide Prevention (R21MH081099, MH082802)
  • Stanley Medical Research Institute
  • Canadian Institutes of Health Research (171859_1, 190734_1)
  • National Institute of Mental Health (R21MH081099, R01MH68777, R01MH068777, R01MH082802, MH082802, R21MH091509)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
Keywords
microRNA expression, depression, suicide, prefrontal cortex, microRNA downregulation, miRNA target genes, chromosomal loci, gene expression regulation
MeSH terms
Adult, Depression, Female, Gene Expression Regulation, Humans, Male, Middle Aged, Proteins, Quebec, Suicide, Blotting, Western, Case-Control Studies, RNA-Binding Proteins, Prefrontal Cortex, DNA Primers, Statistics, Nonparametric, Reverse Transcriptase Polymerase Chain Reaction, MicroRNAs, Ribonuclease III, DEAD-box RNA Helicases, Multiplex Polymerase Chain Reaction

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