TY - JOUR
T1 - Genomic relationships across psychiatric disorders including substance use disorders
AU - Abdellaoui, Abdel
AU - Smit, Dirk J. A.
AU - van den Brink, Wim
AU - Denys, Damiaan
AU - Verweij, Karin J. H.
N1 - Funding Information: A.A. & K.J.H.V. are supported by the Foundation Volksbond Rotterdam (the Netherlands) . A.A. is also supported by ZonMw grant 849200011 from The Netherlands Organisation for Health Research and Development. Publisher Copyright: © 2021 The Authors
PY - 2021/3/1
Y1 - 2021/3/1
N2 - Background: A recent study investigated the genetic associations and latent genetic structure among eight psychiatric disorders using findings from genome-wide association studies (GWASs). No data from substance use disorders were included, while these represent an important category of mental disorders and could influence the latent genetic structure. We extended the original paper by recreating the genetic relationship matrix, graph, and latent genetic factor structure, including additional data from substance use disorders. Methods: We used GWAS summary statistics of 11 psychiatric disorders, including alcohol dependence, nicotine dependence, and cannabis use disorder. We estimated genetic correlations between all traits in Linkage Disequilibrium-Score Regression. A graph was created to illustrate the network of genetic correlations. We then used the genetic relationships to model a latent genetic factor structure. Results: Alcohol and nicotine dependence showed significant genetic correlations with several other psychiatric disorders, including ADHD, schizophrenia, and major depression. Cannabis use disorder was only significantly associated with ADHD. The addition of substance use disorders resulted in some changes in the latent structure of the factor model when compared to the original model including eight disorders. All substance use disorders contributed mostly to Factor 3, a heterogeneous factor with also loadings from ADHD, major depression, Autism Spectrum Disorders, and Tourette Syndrome. Conclusions: Alcohol and nicotine dependence show widespread genetic correlations with other psychiatric disorders. Including substance use disorders in the factor analysis results in some changes in the underlying genetic factor structure. Given the instability of such models, identified structures should be interpreted with caution.
AB - Background: A recent study investigated the genetic associations and latent genetic structure among eight psychiatric disorders using findings from genome-wide association studies (GWASs). No data from substance use disorders were included, while these represent an important category of mental disorders and could influence the latent genetic structure. We extended the original paper by recreating the genetic relationship matrix, graph, and latent genetic factor structure, including additional data from substance use disorders. Methods: We used GWAS summary statistics of 11 psychiatric disorders, including alcohol dependence, nicotine dependence, and cannabis use disorder. We estimated genetic correlations between all traits in Linkage Disequilibrium-Score Regression. A graph was created to illustrate the network of genetic correlations. We then used the genetic relationships to model a latent genetic factor structure. Results: Alcohol and nicotine dependence showed significant genetic correlations with several other psychiatric disorders, including ADHD, schizophrenia, and major depression. Cannabis use disorder was only significantly associated with ADHD. The addition of substance use disorders resulted in some changes in the latent structure of the factor model when compared to the original model including eight disorders. All substance use disorders contributed mostly to Factor 3, a heterogeneous factor with also loadings from ADHD, major depression, Autism Spectrum Disorders, and Tourette Syndrome. Conclusions: Alcohol and nicotine dependence show widespread genetic correlations with other psychiatric disorders. Including substance use disorders in the factor analysis results in some changes in the underlying genetic factor structure. Given the instability of such models, identified structures should be interpreted with caution.
KW - Dual disorder
KW - Genetic correlations
KW - Genetic structure
KW - Psychiatric disorders
KW - Substance use disorders
UR - http://www.scopus.com/inward/record.url?scp=85100026346&partnerID=8YFLogxK
U2 - https://doi.org/10.1016/j.drugalcdep.2021.108535
DO - https://doi.org/10.1016/j.drugalcdep.2021.108535
M3 - Article
C2 - 33524898
SN - 0376-8716
VL - 220
JO - Drug and alcohol dependence
JF - Drug and alcohol dependence
M1 - 108535
ER -