Genome-wide gene-environment analyses of major depressive disorder and reported lifetime traumatic experiences in UK Biobank

Jonathan R.I. Coleman, Wouter J. Peyrot, Major Depressive Disorder Working Group of the Psychiatric Genomics Consortium, Kirstin L. Purves, Katrina A.S. Davis, Christopher Rayner, Shing Wan Choi, Christopher Hübel, Héléna A. Gaspar, Carol Kan, Sandra Van der Auwera, Mark James Adams, Donald M. Lyall, Karmel W. Choi, Naomi R. Wray, Stephan Ripke, Manuel Mattheisen, Maciej Trzaskowski, Enda M. Byrne, Abdel AbdellaouiEsben Agerbo, Tracy M. Air, Till F.M. Andlauer, Silviu Alin Bacanu, Marie Bækvad-Hansen, Aartjan T.F. Beekman, Tim B. Bigdeli, Elisabeth B. Binder, Julien Bryois, Henriette N. Buttenschøn, Jonas Bybjerg-Grauholm, Na Cai, Enrique Castelao, Jane Hvarregaard Christensen, Toni Kim Clarke, Lucía Colodro-Conde, Baptiste Couvy-Duchesne, Nick Craddock, Gregory E. Crawford, Gail Davies, Nese Direk, Erin C. Dunn, Jouke Jan Hottenga, Rick Jansen, Danielle Posthuma, Saira Saeed Mirza, Alexander Teumer, Andrés G. Uitterlinden, Jian Yang, E. J.C. de Geus, Henning Tiemeier

Research output: Contribution to journalArticleAcademicpeer-review

93 Citations (Scopus)

Abstract

Depression is more frequent among individuals exposed to traumatic events. Both trauma exposure and depression are heritable. However, the relationship between these traits, including the role of genetic risk factors, is complex and poorly understood. When modelling trauma exposure as an environmental influence on depression, both gene-environment correlations and gene-environment interactions have been observed. The UK Biobank concurrently assessed Major Depressive Disorder (MDD) and self-reported lifetime exposure to traumatic events in 126,522 genotyped individuals of European ancestry. We contrasted genetic influences on MDD stratified by reported trauma exposure (final sample size range: 24,094–92,957). The SNP-based heritability of MDD with reported trauma exposure (24%) was greater than MDD without reported trauma exposure (12%). Simulations showed that this is not confounded by the strong, positive genetic correlation observed between MDD and reported trauma exposure. We also observed that the genetic correlation between MDD and waist circumference was only significant in individuals reporting trauma exposure (rg = 0.24, p = 1.8 × 10−7 versus rg = −0.05, p = 0.39 in individuals not reporting trauma exposure, difference p = 2.3 × 10−4). Our results suggest that the genetic contribution to MDD is greater when reported trauma is present, and that a complex relationship exists between reported trauma exposure, body composition, and MDD.

Original languageEnglish
Pages (from-to)1430-1446
Number of pages17
JournalMolecular Psychiatry
Volume25
Issue number7
DOIs
Publication statusPublished - 1 Jul 2020

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© 2020, The Author(s), under exclusive licence to Springer Nature Limited.

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