ArticlebioRxiv : the preprint server for biology2025
Developmental variation in dopamine neurobiology, neurocognitive functioning, and impulsivity shape substance use trajectories in youth.
Article in bioRxiv : the preprint server for biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Theoretical neurodevelopmental models implicate increases in dopamine (DA) function and limitations in neurocognitive control in risk-taking behavior, including substance use, during the transition from adolescence to adulthood. However, developmental relationships between DA, neurocognitive control, and the emergence of substance use are poorly understood. Here, we tested the role of basal ganglia tissue iron, reflecting DA neurophysiology, as well as impulsivity and inhibitory control in longitudinal developmental trajectories of substance use. We leveraged the National Consortium on Alcohol and NeuroDevelopment in Adolescence and Adulthood (NCANDA-A) cohort, a large, multisite longitudinal neuroimaging study of 807 participants (baseline ages 12 - 22 years old, 50% female, 1 - 9 annual visits per participant, 6164 sessions total). Substance use, inhibitory control, and tissue iron increased non-linearly during adolescence into young adulthood, concurrent with decreases in impulsivity. Non-linear Growth Mixture Models identified four common trajectories of substance use:
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