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From gene to brain to behavior: schizophrenia-associated variation in AMBRA1 alters impulsivity-related traits

Research output: Contribution to journalArticle

Angela Heinrich, Frauke Nees, Anbarasu Lourdusamy, Jelka Tzschoppe, Sandra Meier, Sabine Vollstädt-Klein, Mira Fauth-Bühler, Sabina Steiner, Christiane Bach, Luise Poustka, Tobias Banaschewski, Gareth J Barker, Christian Büchel, Patricia J Conrod, Hugh Garavan, Jürgen Gallinat, Andreas Heinz, Bernd Ittermann, Eva Loth, Karl Mann & 12 more Eric Artiges, Tomáš Paus, Claire Lawrence, Zdenka Pausova, Michael N Smolka, Andreas Ströhle, Maren Struve, Stephanie H Witt, Gunter Schumann, Herta Flor, Marcella Rietschel, The IMAGEN Consortium

Original languageEnglish
JournalEuropean Journal of Neuroscience
DOIs
Publication statusE-pub ahead of print - 1 Apr 2013

Bibliographical note

© 2013 Federation of European Neuroscience Societies and Blackwell Publishing Ltd.

King's Authors

Abstract

Recently, genome-wide association between schizophrenia and an intronic variant in AMBRA1 (rs11819869) was reported. Additionally, in a reverse genetic approach in adult healthy subjects, risk allele carriers showed a higher medial prefrontal cortex blood oxygen level-dependent (BOLD) response during a flanker task examining motor inhibition as an aspect of impulsivity. To test whether this finding can be expanded to further aspects of impulsivity, we analysed the effects of the rs11819869 genotype on impulsivity-related traits on a behavioral, temperament and neural level in a large sample of healthy adolescents. We consider this reverse genetic approach specifically suited for use in a healthy adolescent sample, as these individuals comprise those who will eventually develop mental disorders in which impulsivity is implicated. Healthy adolescents from the IMAGEN study were included in the neuropsychological analysis (n = 848) and a functional magnetic resonance imaging (fMRI) task (n = 512). Various aspects of impulsivity were assessed using the Temperament and Character Inventory-Revised, the Substance Use Risk Profile Scale, the Cambridge Cognition Neuropsychological Test Automated Battery, and the Stop Signal Task (SST) in the fMRI paradigm. On a behavioral level, increased delay aversion was observed in risk allele carriers. Furthermore, risk allele carriers showed a higher BOLD response in an orbito-frontal target region during the SST, which declined to trend status after Family Wise Error correction. Our findings support the hypothesis that the schizophrenia-related risk variant of rs11819869 is involved in various aspects of impulsivity, and that this involvement occurs on a behavioral as well as an imaging genetics level.

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