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Investigating the genetic architecture of general and specific psychopathology in adolescence

Jones, Hannah J., Heron, Jon, Hammerton, Gemma, Stochl, Jan, Jones, Peter B., Cannon, Mary, Smith, George Davey, Holmans, Peter, Lewis, Glyn, Linden, David E. J., O'Donovan, Michael C., Owen, Michael J., Walters, James and Zammit, Stanley 2018. Investigating the genetic architecture of general and specific psychopathology in adolescence. Translational Psychiatry 8 (1) , 145. 10.1038/s41398-018-0204-9

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Abstract

Whilst associations between polygenic risk scores (PRSs) for schizophrenia and various phenotypic outcomes have been reported, an understanding of developmental pathways can only be gained by modelling comorbidity across psychopathology. We examine how genetic risk for schizophrenia relates to adolescent psychosis-related and internalizing psychopathology using a latent modelling approach, and compare this to genetic risk for other psychiatric disorders, to gain a more comprehensive understanding of the developmental pathways at this age. PRSs for schizophrenia, major depressive disorder, neuroticism and bipolar disorder were generated for individuals in the Avon Longitudinal Study of Parents and Children (ALSPAC) birth cohort. Multivariate linear regression was used to examine the relationships of these PRSs with psychopathology factors modelled within (i) a correlated factors structure and (ii) a bifactor structure. The schizophrenia PRS was associated with an increase in factors describing psychotic experiences, negative dimension, depression and anxiety, but, when modelling a general psychopathology factor based on these measures, specific effects above this persisted only for the negative dimension. Similar factor relationships were observed for the neuroticism PRS, with a (weak) specific effect only for anxiety once modelling general psychopathology. Psychopathology during adolescence can be described by a general psychopathology construct that captures common variance as well as by specific constructs capturing remaining non-shared variance. Schizophrenia risk genetic variants identified through genome-wide association studies mainly index negative rather than positive symptom psychopathology during adolescence. This has potentially important implications both for research and risk prediction in high-risk samples.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG)
Publisher: Nature Publishing Group: Open Access Journals - Option B / Nature Publishing Group
ISSN: 2158-3188
Date of First Compliant Deposit: 31 August 2018
Date of Acceptance: 15 July 2018
Last Modified: 31 Dec 2018 21:53
URI: http://orca.cf.ac.uk/id/eprint/114514

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