Abstract
Obesity has a strong genetic component, with up to 20% of variance in body mass index (BMI) being accounted for by common polygenic variation. Most genetic polymorphisms associated with BMI are related to genes expressed in the central nervous system. At the same time, higher BMI is associated with neurocognitive changes. However, the direct link between genetics of obesity and neurobehavioral mechanisms related to weight gain is missing. Here, we use a large sample of participants (n > 4000) from the Adolescent Brain Cognitive Development cohort to investigate how genetic risk for obesity, expressed as polygenic risk score for BMI (BMI-PRS), is related to brain and behavioral measures in adolescents. In a series of analyses, we show that BMI-PRS is related to lower cortical volume and thickness in the frontal and temporal areas, relative to age-expected values. Relatedly, using structural equation modeling, we find that lower overall cortical volume is associated with higher impulsivity, which in turn is related to an increase in BMI 1 year later. In sum, our study shows that obesity might partially stem from genetic risk as expressed in brain changes in the frontal and temporal brain areas, and changes in impulsivity.
Original language | English |
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Article number | 1 |
Pages (from-to) | 1-9 |
Number of pages | 9 |
Journal | Translational Psychiatry |
Volume | 13 |
DOIs | |
Publication status | Published - 3 Jan 2023 |
Bibliographical note
Funding Information:This work was supported by a Foundation Scheme award to AD from the Canadian Institutes of Health Research, by computing resources from Calcul Quebec ( www.calculquebec.ca ) and Compute Canada ( www.computecanada.ca ), the Funai Foundation for Information Technology fellowship to MS, and by a Fonds de recherche du Québec–Santé (FRQS) foreign post-doctoral training award to FM. UV has been funded by Estonian Research Council’s personal research funding start-up grant PSG759. This work was also financially supported by Parkinson Canada, the Canadian Consortium on Neurodegeneration in Aging (CCNA), and the Canada First Research Excellence Fund (CFREF), awarded to McGill University for the Healthy Brains for Healthy Lives (HBHL) program. ZGO is supported by the Fonds de recherche du Québec - Santé (FRQS) Chercheurs-boursiers award, and is a William Dawson Scholar.
Publisher Copyright:
© 2023, The Author(s).