Genetic risk for schizophrenia and autism, social impairment and developmental pathways to psychosis

Eva Velthorst*, Sean Froudist-Walsh, Eli Stahl, Douglas Ruderfer, Ilyan Ivanov, Joseph Buxbaum, iPSYCH-Broad ASD Group, the IMAGEN consortium, Tobias Banaschewski, Arun L.W. Bokde, Uli Bromberg, Christian Büchel, Erin Burke Quinlan, Sylvane Desrivières, Herta Flor, Vincent Frouin, Hugh Garavan, Penny Gowland, Andreas Heinz, Bernd Ittermann, Marie Laure Paillère MartinotEric Artiges, Frauke Nees, Dimitri Papadopoulos Orfanos, Tomáš Paus, Luise Poustka, Sarah Hohmann, Juliane H. Fröhner, Michael N. Smolka, Henrik Walter, Robert Whelan, Gunter Schumann, Abraham Reichenberg, Anders D. Børglum, Jakob Grove, Manuel Mattheisen, Thomas Werge, Preben Bo Mortensen, Marianne Giørtz Pedersen, Carsten Bøcker Pedersen, Ole Mors, Merete Nordentoft, David M. Hougaard, Jonas Bybjerg-Grauholm, Marie Bækvad-Hansen, Christine Søholm Hansen, Mark J. Daly, Benjamin M. Neale, Elise B. Robinson, Felecia Cerrato, Ashley Dumont, Jacqueline Goldstein

*Corresponding author af dette arbejde
8 Citationer (Scopus)
31 Downloads (Pure)

Abstract

While psychotic experiences (PEs) are assumed to represent psychosis liability, general population studies have not been able to establish significant associations between polygenic risk scores (PRS) and PEs. Previous work suggests that PEs may only represent significant risk when accompanied by social impairment. Leveraging data from the large longitudinal IMAGEN cohort, including 2096 14-year old adolescents that were followed-up to age 18, we tested whether the association between polygenic risk and PEs is mediated by (increasing) impairments in social functioning and social cognitive processes. Using structural equation modeling (SEM) for the subset of participants (n = 643) with complete baseline and follow-up data, we examined pathways to PEs. We found that high polygenic risk for schizophrenia (p = 0.014), reduced brain activity to emotional stimuli (p = 0.009) and social impairments in late adolescence (p < 0.001; controlling for functioning in early adolescence) each independently contributed to the severity of PEs at age 18. The pathway between polygenic risk for autism spectrum disorder and PEs was mediated by social impairments in late adolescence (indirect pathway; p = 0.025). These findings point to multiple direct and indirect pathways to PEs, suggesting that different processes are in play, depending on genetic loading, and environment. Our results suggest that treatments targeting prevention of social impairment may be particularly promising for individuals at genetic risk for autism in order to minimize risk for psychosis.

OriginalsprogEngelsk
Artikelnummer204
TidsskriftTranslational Psychiatry
Vol/bind8
Udgave nummer1
ISSN2158-3188
DOI
StatusUdgivet - 2018

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