Brain Networks and Adolescent Alcohol Use.

Area of Science:

• Neuroscience
• Developmental Psychology
• Addiction Research

Background:

• Adolescent alcohol misuse is a significant public health concern, contributing to disability and mortality.
• Understanding the underlying brain mechanisms is crucial for developing effective prevention and intervention strategies.
• Neurodevelopmental sex differences may play a role in alcohol use disorder (AUD) risk.

Purpose of the Study:

• To identify neurobiological markers of alcohol misuse using a data-driven approach.
• To investigate potential sex differences in these neuromarkers during adolescence.
• To link brain functional organization patterns to current and future alcohol use risk.

Main Methods:

• Longitudinal functional magnetic resonance imaging (fMRI) data from 1359 adolescents (ages 14-19) were analyzed.
• A data-driven, whole-brain connectivity approach was employed to identify risk networks.
• Alcohol Use Disorder Identification Test (AUDIT) scores were used to measure alcohol use risk.
• Model generalizability was tested across different cohorts and sexes.

Main Results:

• Data-driven models identified brain networks associated with vulnerability to current and future alcohol use risk (future: ρ=0.22, present: ρ=0.27).
• Female-specific models demonstrated higher accuracy than male-specific models in predicting alcohol use risk.
• Male-specific models showed domain specificity, identifying risk networks related to inhibitory control but not reward processing.

Conclusions:

• Novel brain networks associated with adolescent alcohol use risk were identified.
• Sex-specific differences in brain-behavior relationships highlight the need for tailored interventions.
• Interventions targeting inhibitory control may benefit male adolescents, while both inhibitory and reward processes are relevant for females.