Cited by 103Posttraumatic Stress Disorder ResearchEpigenetics and DNA MethylationStress Responses and Cortisol

An epigenome-wide DNA methylation study of PTSD and depression in World Trade Center responders

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Kuan, P-F, Waszczuk, M A, Kotov, R, Marsit, C J, Guffanti, G, Gonzalez, A, Yang, X, Koenen, K +2 more·2017·Translational Psychiatry

Abstract

Previous epigenome-wide association studies (EWAS) of posttraumatic stress disorder (PTSD) and major depressive disorder (MDD) have been inconsistent. This may be due to small sample sizes, and measurement and tissue differences. The current two EWA analyses of 473 World Trade Center responders are the largest to date for both PTSD and MDD. These analyses investigated DNA methylation patterns and biological pathways influenced by differentially methylated genes associated with each disorder. Methylation was profiled on blood samples using Illumina 450 K Beadchip. Two EWA analyses compared current versus never PTSD, and current versus never MDD, adjusting for cell types and demographic confounders. Pathway and gene set enrichment analyses were performed to understand the complex biological systems of PTSD and MDD. No significant epigenome-wide associations were found for PTSD or MDD at an FDR P<0.05. The majority of genes with differential methylation at a suggestive threshold did not overlap between the two disorders. Pathways significant in PTSD included a regulator of synaptic plasticity, oxytocin signaling, cholinergic synapse and inflammatory disease pathways, while only phosphatidylinositol signaling and cell cycle pathways emerged in MDD. The failure of the current EWA analyses to detect significant epigenome-wide associations is in contrast with disparate findings from previous, smaller EWA and candidate gene studies of PTSD and MDD. Enriched gene sets involved in several biological pathways, including stress response, inflammation and physical health, were identified in PTSD, supporting the view that multiple genes play a role in this complex disorder.

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  • Two EWAS studies in PTSD found differences in DNAm across genes part of biological pathways involved with inflammation and immune response.

    “Two EWAS studies in PTSD found differences in DNAm across genes part of biological pathways involved with inflammation and immune response (Kuan et al., 2017; Uddin et al., 2010).”

    From Can epigenetics shine a light on the biological pathways underlying major mental disorders? (2022) · cites this paper as Kuan et al., 2017

    The Results (Pathway and gene ontology analyses) identify PTSD-associated pathways, including an inflammatory bowel disease pathway, and the Discussion (Biological pathways) describes several immunity-related pathways. But the Abstract reports no significant epigenome-wide methylation associations, and the Discussion (EWAS findings) says no individual immune-system gene was identified. The claim captures the pathway findings but overstates the evidence for DNA methylation differences in individual genes. (LLM, conf=0.84)

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  • Epigenetic disruption has been implicated in cancer, aging, and a range of complex diseases, including psychiatric disorders such as depression and PTSD.

    “Epigenetic disruption has been clearly implicated in cancer, aging, and a range of complex diseases, including psychiatric disorders, such as depression [33] and PTSD [34,35].”

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  1. Binder EB, Bradley RG, Liu W, Epstein MP, Deveau TC, Mercer KB et al. Association of FKBP5 polymorphisms and childhood abuse with risk of posttraumatic stress disorder symptoms in adults. JAMA 2008; 299: 1291–1305. 18349090 PMC2441757
  2. First MB, Spitzer RL, Gibbon M, Williams JB. Structured Clinical Interview for DSM-IV Axis I Disorders: Patient Edition (February 1996 Final), SCID-I/P: Biometrics Research Department. New York State Psychiatric Institute: New York, NY, 1998.

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Authors
Kuan, P.-F., Waszczuk, M. A., Kotov, R., Marsit, C. J., Guffanti, G., Gonzalez, A., Yang, X., Koenen, K., Bromet, E., & Luft, B. J.
Affiliations
  • Stony Brook University (US)
  • Emory University (US)
  • Harvard University (US)
Corresponding author
Luft, B J
Venue
Translational Psychiatry
Published
2017-06-27
Volume
7
Issue
6
Pages
e1158-e1158
ISSN
2158-3188 (ISSN-L)
OpenAlex
W2634894186
Cited by
103
References
80
Citations by year
2026: 4 · 2025: 7 · 2024: 10 · 2023: 8 · 2022: 17 · 2021: 16 · 2020: 15 · 2019: 12 · 2018: 13 · 2017: 1
FWCI
13.91
Type
journal article
Language
en
Open access
Locations
  • Translational Psychiatry (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Funders
  • Stony Brook University
  • Centers for Disease Control and Prevention
  • National Institute for Occupational Safety and Health (U01OH010416, U01 OH010416-01)
Topics
  • Social Sciences › Psychology › Clinical Psychology › Posttraumatic Stress Disorder Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
Keywords
post-traumatic stress disorder, major depressive disorder, DNA methylation, epigenome-wide association study, World Trade Center responders, differentially methylated genes, gene set enrichment analysis, synaptic plasticity, oxytocin signaling, cholinergic synapses, phosphoinositide signaling, cell cycle, stress response, inflammation
MeSH terms
Major Depressive Disorder, Depressive Disorder, Major, Humans, Male, Middle Aged, Stress Disorders, Post-Traumatic, Signal Transduction, CpG Islands, DNA Methylation, Epigenesis, Genetic, September 11 Terrorist Attacks, Genome-Wide Association Study, Epigenomics, Emergency Responders

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