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The link between testosterone and amygdala-orbitofrontal cortex connectivity in adolescent alcohol use
Sabine Peters1, Dietsje J Jolles2, Anna C K Van Duijvenvoorde1
1Department of Developmental and Educational Psychology, Leiden University, Wassenaarseweg 52, 2333AK Leiden, The Netherlands; Leiden Institute for Brain and Cognition, Albinusdreef 2, 2333 ZA Leiden, The Netherlands.
Psychoneuroendocrinology
|January 26, 2015
Summary
Testosterone influences adolescent boys' alcohol use by altering brain connectivity. Higher testosterone in boys is linked to reduced amygdala-orbitofrontal cortex connectivity, which predicts increased alcohol consumption.
Area of Science:
- Neuroscience
- Adolescent Psychology
- Endocrinology
Background:
- Adolescent alcohol consumption is a significant risk-taking behavior.
- Sex hormones, like testosterone, may influence risk-taking by affecting brain networks involved in emotion and motivation.
- Previous research suggests a link between alcohol use, testosterone, and amygdala-orbitofrontal cortex (OFC) connectivity in adults.
Purpose of the Study:
- To investigate the association between alcohol use, testosterone levels, and resting-state functional brain connectivity in adolescents.
- To explore the mediating role of amygdala-OFC functional connectivity in the relationship between testosterone and alcohol use in a large adolescent sample.
Main Methods:
- Utilized mediation analyses on a sample of 173 adolescents (aged 12-25 years).
- Examined resting-state functional brain connectivity, specifically focusing on the amygdala and orbitofrontal cortex (OFC).
- Assessed alcohol consumption and testosterone levels.
Main Results:
- Found an indirect effect of testosterone on alcohol use through amygdala-OFC intrinsic functional connectivity, exclusively in adolescent boys.
- In boys, higher testosterone levels were associated with reduced amygdala-OFC connectivity.
- This reduced connectivity, in turn, was associated with increased alcohol intake.
Conclusions:
- This study is the first to demonstrate the interplay between adolescent alcohol use, sex hormones (testosterone), and brain mechanisms.
- Highlights the specific role of amygdala-OFC functional connectivity as a mediator in boys.
- Provides crucial insights into the neurobiological mechanisms underlying adolescent risk-taking behaviors related to alcohol.
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