Common genetic variation impacts molecular stress response in the brain
Seah, C.; Singer, R.; Deans, P. M.; Bader, H.; Rusielewicz, T.; Hicks, E. M.; Young, H.; Cote, A.; Townsley, K.; Xu, C.; Hunter, C. J.; McCarthy, B.; Goldberg, J.; Dobariya, S.; Holtzherimer, P. E.; Young, K. A.; NYSCF Global Stem Cell Array Team, ; Traumatic Stress Brain Research Group, ; Noggle, S. A.; Krystal, J. H.; Paull, D.; Girgenti, M. J.; Yehuda, R.; Brennand, K.; Huckins, L.
Show abstract
To explain why individuals exposed to identical stressors experience divergent clinical outcomes, we determine how molecular encoding of stress modifies genetic risk for brain disorders. Analysis of post-mortem brain (n=304) revealed 8557 stress-interactive expression quantitative trait loci (eQTLs) that dysregulate expression of 915 eGenes in response to stress, and lie in stress-related transcription factor binding sites. Response to stress is robust across experimental paradigms: up to 50% of stress-interactive eGenes validate in glucocorticoid treated hiPSC-derived neurons (n=39 donors). Stress-interactive eGenes show brain region- and cell type-specificity, and, in post-mortem brain, implicate glial and endothelial mechanisms. Stress dysregulates long-term expression of disorder risk genes in a genotype-dependent manner; stress-interactive transcriptomic imputation uncovered 139 novel genes conferring brain disorder risk only in the context of traumatic stress. Molecular stress-encoding explains individualized responses to traumatic stress; incorporating trauma into genomic studies of brain disorders is likely to improve diagnosis, prognosis, and drug discovery. Graphical Abstract O_FIG O_LINKSMALLFIG WIDTH=200 HEIGHT=71 SRC="FIGDIR/small/573459v1_ufig1.gif" ALT="Figure 1"> View larger version (25K): org.highwire.dtl.DTLVardef@1e07fa9org.highwire.dtl.DTLVardef@1dd530forg.highwire.dtl.DTLVardef@17822a5org.highwire.dtl.DTLVardef@2a889f_HPS_FORMAT_FIGEXP M_FIG C_FIG
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