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Meta-Analysis
. 2024 Dec 18;16(1):147.
doi: 10.1186/s13073-024-01417-1.

Epigenome-wide association studies identify novel DNA methylation sites associated with PTSD: a meta-analysis of 23 military and civilian cohorts

Seyma Katrinli  1 Agaz H Wani  2 Adam X Maihofer  3   4   5 Andrew Ratanatharathorn  6   7 Nikolaos P Daskalakis  8   9   10 Janitza Montalvo-Ortiz  11   12   13 Diana L Núñez-Ríos  11   12   13 Anthony S Zannas  14   15   16   17 Xiang Zhao  18 Allison E Aiello  19 Allison E Ashley-Koch  20 Diana Avetyan  3 Dewleen G Baker  3   4   21 Jean C Beckham  22   23   24 Marco P Boks  25 Leslie A Brick  26 Evelyn Bromet  27 Frances A Champagne  28 Chia-Yen Chen  29 Shareefa Dalvie  30   31 Michelle F Dennis  22   23   24 Segun Fatumo  32 Catherine Fortier  9   33 Sandro Galea  34 Melanie E Garrett  20 Elbert Geuze  35   36 Gerald Grant  37 Michael A Hauser  38 Jasmeet P Hayes  39 Sian M J Hemmings  40   41 Bertrand Russel Huber  42   43 Aarti Jajoo  8   9   44 Stefan Jansen  45 Ronald C Kessler  46 Nathan A Kimbrel  22   24   47 Anthony P King  48   49 Joel E Kleinman  50   51 Nastassja Koen  52   53   54 Karestan C Koenen  7   8   55 Pei-Fen Kuan  56 Israel Liberzon  57 Sarah D Linnstaedt  58   59 Adriana Lori  60 Benjamin J Luft  61 Jurjen J Luykx  62   63   64 Christine E Marx  22   65   66 Samuel A McLean  67 Divya Mehta  68   69 William Milberg  70 Mark W Miller  71   72 Mary S Mufford  73 Clarisse Musanabaganwa  74   75 Jean Mutabaruka  76 Leon Mutesa  45   77 Charles B Nemeroff  28   78 Nicole R Nugent  79   80   81 Holly K Orcutt  82 Xue-Jun Qin  83 Sheila A M Rauch  84   85 Kerry J Ressler  9   44   60 Victoria B Risbrough  3   4   5 Eugène Rutembesa  86 Bart P F Rutten  87 Soraya Seedat  40   88 Dan J Stein  52   53   54 Murray B Stein  3   21   89 Sylvanus Toikumo  40   90 Robert J Ursano  91 Annette Uwineza  92 Mieke H Verfaellie  93   94 Eric Vermetten  95   96 Christiaan H Vinkers  97   98   99 Erin B Ware  100 Derek E Wildman  101   102 Erika J Wolf  72   103 Ross McD Young  104   105 Ying Zhao  17   58 Leigh L van den Heuvel  40   88 PGC-PTSD Epigenetics WorkgroupPsychENCODE PTSD Brainomics ProjectTraumatic Stress Brain Research GroupMonica Uddin  106 Caroline M Nievergelt  3   4   5 Alicia K Smith  1   60   107 Mark W Logue  108   109   110
Collaborators, Affiliations
Meta-Analysis

Epigenome-wide association studies identify novel DNA methylation sites associated with PTSD: a meta-analysis of 23 military and civilian cohorts

Seyma Katrinli et al. Genome Med. .

Abstract

Background: The occurrence of post-traumatic stress disorder (PTSD) following a traumatic event is associated with biological differences that can represent the susceptibility to PTSD, the impact of trauma, or the sequelae of PTSD itself. These effects include differences in DNA methylation (DNAm), an important form of epigenetic gene regulation, at multiple CpG loci across the genome. Moreover, these effects can be shared or specific to both central and peripheral tissues. Here, we aim to identify blood DNAm differences associated with PTSD and characterize the underlying biological mechanisms by examining the extent to which they mirror associations across multiple brain regions.

Methods: As the Psychiatric Genomics Consortium (PGC) PTSD Epigenetics Workgroup, we conducted the largest cross-sectional meta-analysis of epigenome-wide association studies (EWASs) of PTSD to date, involving 5077 participants (2156 PTSD cases and 2921 trauma-exposed controls) from 23 civilian and military studies. PTSD diagnosis assessments were harmonized following the standardized guidelines established by the PGC-PTSD Workgroup. DNAm was assayed from blood using Illumina HumanMethylation450 or MethylationEPIC (850 K) BeadChips. Within each cohort, DNA methylation was regressed on PTSD, sex (if applicable), age, blood cell proportions, and ancestry. An inverse variance-weighted meta-analysis was performed. We conducted replication analyses in tissue from multiple brain regions, neuronal nuclei, and a cellular model of prolonged stress.

Results: We identified 11 CpG sites associated with PTSD in the overall meta-analysis (1.44e - 09 < p < 5.30e - 08), as well as 14 associated in analyses of specific strata (military vs civilian cohort, sex, and ancestry), including CpGs in AHRR and CDC42BPB. Many of these loci exhibit blood-brain correlation in methylation levels and cross-tissue associations with PTSD in multiple brain regions. Out of 9 CpGs annotated to a gene expressed in blood, methylation levels at 5 CpGs showed significant correlations with the expression levels of their respective annotated genes.

Conclusions: This study identifies 11 PTSD-associated CpGs and leverages data from postmortem brain samples, GWAS, and genome-wide expression data to interpret the biology underlying these associations and prioritize genes whose regulation differs in those with PTSD.

Keywords: DNA methylation; GWAS; Gene expression; PTSD; Postmortem brain; Trauma.

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Conflict of interest statement

Declarations. Ethics approval and consent to participate: All studies were approved by the institutional review boards (IRBs) of each respective institution and carried out in accordance with The Code of Ethics of the Helsinki Declaration. The BEAR study was approved by the Lifespan Hospitals IRB. DNHS was approved by the IRB at the University of Michigan and the University of North Carolina at Chapel Hill. DCHS was approved by the Faculty of Health Sciences, Human Research Ethics Committee, University of Cape Town, by Stellenbosch University, and by the Western Cape Provincial Health Research committee. GTP was approved by the IRBs of Emory University School of Medicine and the Research Oversight Committee of Grady Memorial Hospital. NIU study was approved by the Northern Illinois University IRB. Shared Roots study was approved by the IRB of Stellenbosch University (HREC: N13/08/115). AURORA is approved by the Biomedical IRB at UNC Chapel Hill through the office of Human Research Ethics, the central IRB for all study sites. H3_Rwanda was approved by the IRB of the College of Medicine and Health Sciences at the University of Rwanda (No.370/CMHS/IRB/2020). WTC study was approved by the Committees on Research Involving Human Subjects at Stony Brook University. GMRFQUT was approved by the Human Research Ethics Committee of the Queensland University of Technology and Greenslopes Private Hospital. MRS was approved by the IRBs of the University of California San Diego, VA San Diego Research Service, and Naval Health Research Center. PRISMO was approved by the IRB of the University Medical Center Utrecht. Army STARRS was approved by the Human Subjects Committees of the Uniformed Services University of the Health Sciences for the Henry M. Jackson Foundation (the primary grantee), the Institute for Social Research at the University of Michigan (the organization collecting the data), and all other collaborating organizations. PROGrESS was approved by the IRBs at VA Ann Arbor Healthcare System, the University of Michigan, Ralph H. Johnson VA Medical Center, VA San Diego Healthcare System, Massachusetts General Hospital, and the Department of Defense Human Research Protection Office. NCPTSD/TRACTS was approved by the IRBs of Human Studies Research at the VA Boston Healthcare System. INTRuST was approved by the Human Research Protection Program at the University of California San Diego. VA-M-AA and VA-M-EA were approved by the IRBs at the Salisbury VA, Hampton VA, Durham VA, and Duke University Medical Centers. All individuals provided written informed consent to participate in these studies. Consent for publication: Not applicable. Competing interests: CYC is an employee of Biogen Inc. NPD has served on scientific advisory boards for BioVie Pharma, Circular Genomics, and Sentio Solutions for unrelated work. NRN serves as an unpaid member of the Ilumivu advisory board. SAMR receives support from the Wounded Warrior Project (WWP), Department of Veterans Affairs (VA), National Institute of Health (NIH), McCormick Foundation, Tonix Pharmaceuticals, Woodruff Foundation, and Department of Defense (DOD). Dr. Rauch receives royalties from Oxford University Press and American. KJR serves as a consultant for Acer, Bionomics, and Jazz Pharma; SABs for Sage, Boehringer Ingelheim, and Senseye. DJS has received consultancy honoraria from Discovery Vitality, Johnson & Johnson, Kanna, L’Oreal, Lundbeck, Orion, Sanofi, Servier, Takeda and Vistagen. MBS has in the past 3 years received consulting income from Acadia Pharmaceuticals, Aptinyx, atai Life Sciences, BigHealth, Biogen, Bionomics, BioXcel Therapeutics, Boehringer Ingelheim, Clexio, Delix Therapeutics, Eisai, EmpowerPharm, Engrail Therapeutics, Janssen, Jazz Pharmaceuticals, NeuroTrauma Sciences, PureTech Health, Sage Therapeutics, Sumitomo Pharma, and Roche/Genentech. MBS has stock options in Oxeia Biopharmaceuticals and EpiVario. MBS has been paid for his editorial work on Depression and Anxiety (Editor-in-Chief), Biological Psychiatry (Deputy Editor), and UpToDate (Co-Editor-in-Chief for Psychiatry). MBS has also received research support from NIH, the Department of Veterans Affairs, and the Department of Defense. MBS is on the scientific advisory board for the Brain and Behavior Research Foundation and the Anxiety and Depression Association of America.

Figures

Fig. 1
Fig. 1
Manhattan plot of the epigenome-wide association meta-analyses. The x-axis depicts chromosomes and the location of each CpG site across the genome. The y-axis depicts the − log10 of the unadjusted p-value for the association with current PTSD. Each dot represents a CpG site. The solid blue line indicates the epigenome‐wide statistical significance at p < 9.0e − 8
Fig. 2
Fig. 2
Summary of all analyses and findings. The figure combines CpGs from the main analysis (gold) and stratified analyses for sex, ancestry, and trauma type (light gold); and summarizes the results of blood and brain correlations (rose); gene expression (purple); cross-tissue associations for multiple brain regions (light blue), neuronal nuclei (blue), and a fibroblast model of prolonged stress (aqua); and genetic effects, including methylation quantitative trait loci (meQTL) analyses (light green) and genetic associations from the recent PGC-PTSD GWAS (dark green). Positive findings (p < 0.05) are indicated with the specific color of the respective category. Asterisk (*) indicates epigenome-wide significance (p < 9e − 8). Gray represents the CpGs or genes that were not present in the respective datasets. PFC, prefrontal cortex; EC, entorhinal cortex; STG, superior temporal gyrus; CER, cerebellum; dlPFC, dorsolateral prefrontal cortex; vmPFC, ventromedial prefrontal cortex; DG, dentate gyrus; 5mC, 5-methylcytosine; GC, glucocorticoid

Update of

  • Epigenome-wide association studies identify novel DNA methylation sites associated with PTSD: A meta-analysis of 23 military and civilian cohorts.
    Katrinli S, Wani AH, Maihofer AX, Ratanatharathorn A, Daskalakis NP, Montalvo-Ortiz J, Núñez-Ríos DL, Zannas AS, Zhao X, Aiello AE, Ashley-Koch AE, Avetyan D, Baker DG, Beckham JC, Boks MP, Brick LA, Bromet E, Champagne FA, Chen CY, Dalvie S, Dennis MF, Fatumo S, Fortier C, Galea S, Garrett ME, Geuze E, Grant G, Michael A Hauser, Hayes JP, Hemmings SM, Huber BR, Jajoo A, Jansen S, Kessler RC, Kimbrel NA, King AP, Kleinman JE, Koen N, Koenen KC, Kuan PF, Liberzon I, Linnstaedt SD, Lori A, Luft BJ, Luykx JJ, Marx CE, McLean SA, Mehta D, Milberg W, Miller MW, Mufford MS, Musanabaganwa C, Mutabaruka J, Mutesa L, Nemeroff CB, Nugent NR, Orcutt HK, Qin XJ, Rauch SAM, Ressler KJ, Risbrough VB, Rutembesa E, Rutten BPF, Seedat S, Stein DJ, Stein MB, Toikumo S, Ursano RJ, Uwineza A, Verfaellie MH, Vermetten E, Vinkers CH, Ware EB, Wildman DE, Wolf EJ, Young RM, Zhao Y, van den Heuvel LL; PGC-PTSD Epigenetics Workgroup, PsychENCODE PTSD Brainomics Project, Traumatic Stress Brain Research Group; Uddin M, Nievergelt CM, Smith AK, Logue MW. Katrinli S, et al. medRxiv [Preprint]. 2024 Jul 15:2024.07.15.24310422. doi: 10.1101/2024.07.15.24310422. medRxiv. 2024. Update in: Genome Med. 2024 Dec 18;16(1):147. doi: 10.1186/s13073-024-01417-1. PMID: 39072012 Free PMC article. Updated. Preprint.

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