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Genes in treatment: Polygenic risk scores for different psychopathologies, neuroticism, educational attainment and IQ and the outcome of two different exposure-based fear treatments

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André Wannemüller, Robert Kumsta, Hans Peter Jöhren, Thalia C. Eley, Tobias Teismann, Dirk Moser, Christopher Rayner, Gerome Breen, Jonathan Coleman, Svenja Schaumburg, Simon E. Blackwell, Jürgen Margraf

Original languageEnglish
Pages (from-to)699-712
Number of pages14
JournalWorld Journal of Biological Psychiatry
Volume22
Issue number9
DOIs
Accepted/In press2021
Published2021

Bibliographical note

Funding Information: Christopher Rayner is funded by a studentship grant awarded to Thalia Eley and Gerome Breen by Foundation Peters. Thalia Eley is part-funded by a program grant from the UK Medical Research Council (MR/M021475/1). This study presents independent research [part-] funded by the National Institute for Health Research (NIHR) Biomedical Research Centre at South London and Maudsley NHS Foundation Trust and King’s College London. The views expressed are those of the author(s) and not necessarily those of the NHS, the NIHR or the Department of Health. This research was funded by an Alexander von Humboldt professorship, awarded to Jürgen Margraf. Publisher Copyright: © 2021 Informa UK Limited, trading as Taylor & Francis Group. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

King's Authors

Abstract

Objectives: Evidence for a genetic influence on psychological treatment outcome so far has been inconsistent, likely due to the focus on candidate genes and the heterogeneity of the disorders treated. Using polygenic risk scores (PRS) in homogenous patient samples may increase the chance of detecting genetic influences. Methods: A sample of 342 phobic patients treated either for clinically relevant dental fear (n = 189) or other (mixed) phobic fears (n = 153) underwent highly standardised exposure-based CBT. A brief five-session format was used to treat dental fear, whereas longer multi-session treatments were used with the mixed-fear cohort. PRS were calculated based on large genetic studies of Neuroticism, Educational Attainment (EA), Intelligence, and four psychopathology domains. We compared PRS of post-treatment and follow-up remitters and non-remitters and regressed PRS on fear reduction percentages. Results: In the dental fear cohort, EA PRS were associated with treatment outcomes, i.e. drop-out, short- and long-term remission state, fear reduction, and attendance of subsequent dental appointments. In the mixed fear treatment cohort, no gene effects were observable. Conclusions: Results indicate the importance of EA-related traits for outcomes following brief, but not long, standardised exposure-based CBT. Such use of PRS may help inform selection and tailoring of treatments.

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