Genome-Wide Meta-Analyses of Stratified Depression in Generation Scotland and UK Biobank', Translational Psychiatry, Vol
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Edinburgh Research Explorer Genome-wide meta-analyses of stratified depression in Generation Scotland and UK Biobank Citation for published version: Generation Scotland, Major Depressive Disorder Working Group of the Psychiatric Genomics Consortium, Porteous, D, Deary, I, Thomson, P, Haley, C & McIntosh, A 2018, 'Genome-wide meta-analyses of stratified depression in Generation Scotland and UK Biobank', Translational Psychiatry, vol. 8, 9. https://doi.org/10.1038/s41398-017-0034-1 Digital Object Identifier (DOI): 10.1038/s41398-017-0034-1 Link: Link to publication record in Edinburgh Research Explorer Document Version: Publisher's PDF, also known as Version of record Published In: Translational Psychiatry Publisher Rights Statement: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. 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If you believe that the public display of this file breaches copyright please contact [email protected] providing details, and we will remove access to the work immediately and investigate your claim. Download date: 07. Oct. 2021 Hall et al. Translational Psychiatry (2018) 8:9 DOI 10.1038/s41398-017-0034-1 Translational Psychiatry ARTICLE Open Access Genome-wide meta-analyses of stratified depression in Generation Scotland and UK Biobank Lynsey S. Hall 1,2,MarkJ.Adams 1, Aleix Arnau-Soler3, Toni-Kim Clarke1, David M. Howard 1, Yanni Zeng1,4, Gail Davies5,6, Saskia P. Hagenaars 1,5,6, Ana Maria Fernandez-Pujals1,JudeGibson 1,EleanorM.Wigmore1, Thibaud S. Boutin4, Caroline Hayward 4,7, Generation Scotland7, Major Depressive Disorder Working Group of the Psychiatric Genomics Consortium, David J. Porteous 3,IanJ.Deary5,6,PippaA.Thomson 3,6, Chris S. Haley4 and Andrew M. McIntosh 1,6 Abstract Few replicable genetic associations for Major Depressive Disorder (MDD) have been identified. Recent studies of MDD have identified common risk variants by using a broader phenotype definition in very large samples, or by reducing phenotypic and ancestral heterogeneity. We sought to ascertain whether it is more informative to maximize the sample size using data from all available cases and controls, or to use a sex or recurrent stratified subset of affected individuals. To test this, we compared heritability estimates, genetic correlation with other traits, variance explained by MDD polygenic score, and variants identified by genome-wide meta-analysis for broad and narrow MDD classifications in two large British cohorts - Generation Scotland and UK Biobank. Genome-wide meta-analysis of MDD in males yielded one genome-wide significant locus on 3p22.3, with three genes in this region (CRTAP, GLB1, and TMPPE) 1234567890():,; 1234567890():,; demonstrating a significant association in gene-based tests. Meta-analyzed MDD, recurrent MDD and female MDD yielded equivalent heritability estimates, showed no detectable difference in association with polygenic scores, and were each genetically correlated with six health-correlated traits (neuroticism, depressive symptoms, subjective well- being, MDD, a cross-disorder phenotype and Bipolar Disorder). Whilst stratified GWAS analysis revealed a genome- wide significant locus for male MDD, the lack of independent replication, and the consistent pattern of results in other MDD classifications suggests that phenotypic stratification using recurrence or sex in currently available sample sizes is currently weakly justified. Based upon existing studies and our findings, the strategy of maximizing sample sizes is likely to provide the greater gain. Introduction recently, the largest international mega-analysis of clini- Major Depressive Disorder (MDD) is a frequently dis- cally diagnosed MDD (9240 MDD cases and 9519 con- abling, chronic disorder for which there is substantial trols) yielded no genome-wide significant findings2. Given evidence of a genetic contribution to its liability1. Until the success of similarly sized studies for other adult psy- chiatric disorders3,4, this study suggested that MDD is an extensively heterogeneous phenotype. This heterogeneity, Correspondence: Lynsey S Hall ([email protected]) 1Division of Psychiatry, University of Edinburgh, Royal Edinburgh Hospital, in addition to the relatively high prevalence and low EH10 5HF Edinburgh, UK heritability of MDD, impacts substantially on the statis- 2 Institute of Genetic Medicine, Newcastle University, NE1 7RU Newcastle upon tical power to detect genetic effects1,5. Possible means of Tyne, UK Full list of author information is available at the end of the article improving statistical power include stratifying the Members of Major Depressive Disorder Working Group of the Psychiatric Genomics Consortium are listed above the References © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a linktotheCreativeCommons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. Hall et al. Translational Psychiatry (2018) 8:9 Page 2 of 12 phenotype into potentially more homogeneous subtypes, previously validated by Smith et al17, in UKB (8248 cases, or considerably increasing the sample size whilst accept- 16,089 controls). Subsequent analyses stratified the phe- ing a broader phenotype. Both of these approaches have notype on the basis of recurrence or sex. Each approach since identified associations between genetic variants and was evaluated using several metrics: the successful iden- – MDD6 9. tification of variants reaching genome-wide significance in A genome-wide association study (GWAS) from the GWAS meta-analysis, an increased SNP-based heritability CONVERGE consortium identified two genome-wide estimate, identification of significant genetic correlations significant loci (chromosome 10q21.3 and 10q26.13) with other traits using LD score regression, and increased using a severe depressive phenotype (5053 cases and 5337 variance explained by polygenic profile scores for MDD controls) in female Han Chinese individuals, treated in a derived from three independent cohorts. These metrics hospital setting6. A subsequent study by the Psychiatric aim to test whether basic stratification of the MDD phe- Genomics Consortium (PGC) stratified the PGC MDD notype improves etiological insight. mega-analysis sample2 by age of onset and identified a risk conferring locus at chromosome 3q27.2 in individuals Materials and methods with onset after 27 years of age9. This study analyzed data from Generation Scotland: In contrast to the above study designs, two studies have The Scottish Family Health Study (GS:SFHS), (data utilized larger sample sizes with less detailed structured available on request: http://www.generationscotland.co. clinical assessments. The first of these studies came from uk) and UKB, (data available on request: http://www. the CHARGE consortium and employed a quantitative ukbiobank.ac.uk). GS:SFHS received ethical approval assessment of depressive symptoms using the Center for from the NHS Tayside Committee on Medical Research Epidemiological Studies Depression Scale. In a combined Ethics (REC Reference Number: 05/S1401/89). UK Bio- dataset of 51 258 individuals, a genome-wide significant bank received ethical approval from the Research Ethics locus was identified at chromosome 5q21.27. More Committee (REC Reference Number: 11/NW/0382). The recently, Hyde et al8 conducted a GWAS using 23andMe present analyses were conducted under UK Biobank data data of self-reported depression in 45,773 cases and application number 4844. All participants provided 106,354 controls, revealing 15 genome-wide significant informed consent. loci. The genetic correlation (rG) between the 23andMe depression phenotype and the clinical phenotype reported Data and code availability by the PGC was rG(SE) = 0.73(0.09), suggesting a strong Data are available