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Significant Role for Maternal Genetic Nurture in the Risk Architecture of Attention Deficit Hyperactivity Disorder
Behrang Mahjani1, Adrianna P Kępińska1, Shelby Smout1
1Seaver Autism Center for Research and Treatment (Mahjani, Kępińska, Smout, Cohen, Caballero, Buxbaum, Grice), Department of Psychiatry (Mahjani, Kępińska, Smout, Cohen, Caballero, Buxbaum, Grice), Department of Genetics and Genomic Sciences (Mahjani, Kępińska, Buxbaum), Department of Artificial Intelligence and Human Health (Mahjani), Mindich Child Health and Development Institute (Mahjani, Buxbaum, Grice), Friedman Brain Institute (Buxbaum), Department of Neuroscience (Buxbaum), and Division of Tics, OCD, and Related Disorders (Grice), Icahn School of Medicine at Mount Sinai, New York; Department of Molecular Medicine and Surgery and Department of Medical Epidemiology and Biostatistics (Mahjani), Karolinska Institutet, Stockholm.
Maternal genetic nurture significantly impacts offspring attention deficit hyperactivity disorder (ADHD) risk, beyond direct genetic inheritance. This highlights the importance of maternal environmental influences on ADHD development.
Area of Science:
- Genetics
- Developmental Psychology
- Epidemiology
Background:
- Parental factors are linked to increased attention deficit hyperactivity disorder (ADHD) risk in offspring.
- The specific pathways, including genetic and environmental influences, are not fully understood.
Purpose of the Study:
- To investigate the impact of maternal phenotype on offspring ADHD risk.
- To differentiate maternal genetic nurture effects from direct genetic inheritance.
Main Methods:
- Utilized data from the Swedish Medical Birth Register (982,544 individuals).
- Partitioned ADHD liability into direct additive genetic, maternal genetic nurture, and maternal common environment effects.
Main Results:
- Identified 66,707 (7%) individuals with ADHD.
- Maternal genetic nurture accounted for 14.3% of ADHD risk.
- Maternal half-siblings showed higher ADHD risk than paternal half-siblings.
Conclusions:
- Maternal genotypes influence offspring ADHD risk via environmental pathways, beyond direct genetic transmission.
- Further research into paternal effects is recommended for a comprehensive understanding of ADHD risk.
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