Trauma and posttraumatic stress disorder modulate polygenic predictors of hippocampal and amygdala volume

Yuanchao ZHENG, Melanie E. GARRETT, Delin SUN, Emily K. CLARKE-RUBRIGHT, Courtney C. HASWELL, Adam X. MAIHOFER, Jeremy A. ELMAN, Carol E. FRANZ, Michael J. LYONS, William S. KREMEN, Matthew PEVERILL, Kelly SAMBROOK, Katie A. MCLAUGHLIN, Nicholas D. DAVENPORT, Seth DISNER, Scott R. SPONHEIM, Elpiniki ANDREW, Mayuresh KORGAONKAR, Richard BRYANT, Tim VARKEVISSERElbert GEUZE, Jonathan COLEMAN, Jean C. BECKHAM, Nathan A. KIMBREL, Danielle SULLIVAN, Mark MILLER, Jasmeet HAYES, Mieke VERFAELLIE, Erika WOLF, David SALAT, Jeffrey M. SPIELBERG, William MILBERG, Regina MCGLINCHEY, Emily L. DENNIS, Paul M. THOMPSON, Sarah MEDLAND, Neda JAHANSHAD, Caroline M. NIEVERGELT, Allison E. ASHLEY-KOCH, Mark W. LOGUE, Rajendra A. MOREY

Research output: Contribution to journalArticlespeer-review

Abstract

The volume of subcortical structures represents a reliable, quantitative, and objective phenotype that captures genetic effects, environmental effects such as trauma, and disease effects such as posttraumatic stress disorder (PTSD). Trauma and PTSD represent potent exposures that may interact with genetic markers to influence brain structure and function. Genetic variants, associated with subcortical volumes in two large normative discovery samples, were used to compute polygenic scores (PGS) for the volume of seven subcortical structures. These were applied to a target sample enriched for childhood trauma and PTSD. Subcortical volume PGS from the discovery sample were strongly associated in our trauma/PTSD enriched sample (n = 7580) with respective subcortical volumes of the hippocampus (p = 1.10 × 10−20), thalamus (p = 7.46 × 10−10), caudate (p = 1.97 × 10−18), putamen (p = 1.7 × 10−12), and nucleus accumbens (p = 1.99 × 10−7). We found a significant association between the hippocampal volume PGS and hippocampal volume in control subjects from our sample, but was absent in individuals with PTSD (GxE; (beta = −0.10, p = 0.027)). This significant GxE (PGS × PTSD) relationship persisted (p < 1 × 10−19) in four out of five threshold peaks (0.024, 0.133, 0.487, 0.730, and 0.889) used to calculate hippocampal volume PGSs. We detected similar GxE (G × ChildTrauma) relationships in the amygdala for exposure to childhood trauma (rs4702973; p = 2.16 × 10−7) or PTSD (rs10861272; p = 1.78 × 10−6) in the CHST11 gene. The hippocampus and amygdala are pivotal brain structures in mediating PTSD symptomatology. Trauma exposure and PTSD modulate the effect of polygenic markers on hippocampal volume (GxE) and the amygdala volume PGS is associated with PTSD risk, which supports the role of amygdala volume as a risk factor for PTSD. Copyright © 2021, This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.

Original languageEnglish
Article number637
JournalTranslational Psychiatry
Volume11
Early online dateDec 2021
DOIs
Publication statusPublished - 2021

Citation

Zheng, Y., Garrett, M. E., Sun, D., Clarke-Rubright, E. K., Haswell, C. C., Maihofer, A. X., . . . Morey, R. A. (2021). Trauma and posttraumatic stress disorder modulate polygenic predictors of hippocampal and amygdala volume. Translational Psychiatry, 11. Retrieved from https://doi.org/10.1038/s41398-021-01707-x

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