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Discordant associations of educational attainment with ASD and ADHD implicate a polygenic form of pleiotropy

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Verhoef,  Ellen
Language and Genetics Department, MPI for Psycholinguistics, Max Planck Society;
International Max Planck Research School for Language Sciences, MPI for Psycholinguistics, Max Planck Society;
Population genetics of human communication, MPI for Psycholinguistics, Max Planck Society;

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St Pourcain,  Beate
Language and Genetics Department, MPI for Psycholinguistics, Max Planck Society;
University of Bristol;
Donders Institute for Brain, Cognition and Behaviour, External Organizations;
Population genetics of human communication, MPI for Psycholinguistics, Max Planck Society;

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Citation

Verhoef, E., Grove, J., Shapland, C. Y., Demontis, D., Burgess, S., Rai, D., et al. (2021). Discordant associations of educational attainment with ASD and ADHD implicate a polygenic form of pleiotropy. Nature Communications, 12: 6534. doi:10.1038/s41467-021-26755-1.


Cite as: https://hdl.handle.net/21.11116/0000-0009-795F-6
Abstract
Autism Spectrum Disorder (ASD) and Attention-Deficit/Hyperactivity Disorder (ADHD) are complex co-occurring neurodevelopmental conditions. Their genetic architectures reveal striking similarities but also differences, including strong, discordant polygenic associations with educational attainment (EA). To study genetic mechanisms that present as ASD-related positive and ADHD-related negative genetic correlations with EA, we carry out multivariable regression analyses using genome-wide summary statistics (N = 10,610–766,345). Our results show that EA-related genetic variation is shared across ASD and ADHD architectures, involving identical marker alleles. However, the polygenic association profile with EA, across shared marker alleles, is discordant for ASD versus ADHD risk, indicating independent effects. At the single-variant level, our results suggest either biological pleiotropy or co-localisation of different risk variants, implicating MIR19A/19B microRNA mechanisms. At the polygenic level, they point to a polygenic form of pleiotropy that contributes to the detectable genome-wide correlation between ASD and ADHD and is consistent with effect cancellation across EA-related regions.