Rxivist combines preprints from bioRxiv with data from Twitter to help you find the papers being discussed in your field. Currently indexing 55,243 bioRxiv papers from 254,840 authors.
Genetic markers of ADHD-related variations in intracranial volume
Raymond K Walters,
Jason L Stein,
Derrek P Hibar,
Hieab H. Adams,
Nina Roth Mota,
Benjamin M Neale,
Paul M Thompson,
Sarah E Medland,
Anders D. Børglum,
Stephen V. Faraone,
Posted 12 Sep 2017
bioRxiv DOI: 10.1101/184192 (published DOI: 10.1176/appi.ajp.2018.18020149)
Posted 12 Sep 2017
Attention-Deficit/Hyperactivity Disorder (ADHD) is a common and highly heritable neurodevelopmental disorder with a complex pathophysiology, where genetic risk is hypothesized to be mediated by alterations in structure and function of diverse brain networks. We tested one aspect of this hypothesis by investigating the genetic overlap between ADHD (n=55,374) and (mainly subcortical) brain volumes (n=11,221-24,704), using the largest publicly available studies. At the level of common variant genetic architecture, we discovered a significant negative genetic correlation between ADHD and intracranial volume (ICV). Meta-analysis of individual variants found significant loci associated with both ADHD risk and ICV; additional loci were identified for ADHD and amygdala, caudate nucleus, and putamen volumes. Gene-set analysis in the ADHD-ICV meta-analytic data showed significant association with variation in neurite outgrowth-related genes. In summary, our results suggest new hypotheses about biological mechanisms involved in ADHD etiology and highlight the need to study additional brain parameters.
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