Genetic Risk for Cannabis Use Disorder Shows Up as Impulsivity and Brain Changes by Age 14
A polygenic risk score for adult cannabis use disorder predicted substance use, impulsivity traits, and white matter brain differences in teenagers as young as 14.
Quick Facts
What This Study Found
Higher genetic risk for CUD was associated with greater cannabis exposure, more novelty/sensation seeking, higher impulsivity, and lower white matter integrity from age 14. Mediation models showed novelty seeking and impulsivity partially explained the path from genetic risk to cannabis use.
Key Numbers
CUD-PRS and cannabis exposure: beta = 0.098, P < 0.001. CUD-PRS and novelty seeking: beta = 0.105, P < 0.001. CUD-PRS and impulsivity: beta = 0.106, P < 0.001.
How They Did This
Longitudinal data from the IMAGEN cohort with assessments at ages 14 (n=1,762), 19 (n=1,175), and 23 (n=1,139). Polygenic risk scores related to behavioral measures, substance use, and brain imaging.
Why This Research Matters
This is one of the first studies to show that adult CUD genetic risk is already visible in adolescent brain structure and behavior.
The Bigger Picture
Genetic risk for addiction works partly through personality traits and brain structure, suggesting these could be intervention targets.
What This Study Doesn't Tell Us
Effect sizes are small (betas around 0.1). European-ancestry cohort only.
Questions This Raises
- ?Could impulsivity-targeted interventions in genetically at-risk adolescents prevent CUD?
Trust & Context
- Key Stat:
- Genetic risk for adult CUD is visible in brain and behavior by age 14
- Evidence Grade:
- Large longitudinal cohort with neuroimaging and genetic data; moderate because of small effect sizes.
- Study Age:
- 2025 study with data spanning ages 14 to 23
- Original Title:
- Impulsivity behaviors and white matter mediate the relationship between genetic risk for cannabis use disorder and early cannabis use in adolescents.
- Published In:
- Addiction (Abingdon, England), 120(5), 984-996 (2025)
- Authors:
- Cupertino, Renata Basso, Medland, Sarah Elizabeth, Ottino-Gonzalez, Jonatan(3), Cao, Zhipeng, Juliano, Anthony, Pancholi, Devarshi, Banaschewski, Tobias, Bokde, Arun L W, Desrivières, Sylvane, Flor, Herta, Grigis, Antoine, Gowland, Penny, Heinz, Andreas, Brühl, Rüdiger, Martinot, Jean-Luc, Martinot, Marie-Laure Paillère, Artiges, Eric, Nees, Frauke, Orfanos, Dimitri Papadopoulos, Lemaitre, Herve, Paus, Tomáš, Poustka, Luise, Hohmann, Sarah, Fröhner, Juliane H, Smolka, Michael N, Walter, Henrik, Whelan, Robert, Schumann, Gunter, Conrod, Patricia, Callas, Peter, Garavan, Hugh, Mackey, Scott
- Database ID:
- RTHC-06278
Evidence Hierarchy
Follows a group of people over time to track how outcomes develop.
What do these levels mean? →Frequently Asked Questions
Does a high polygenic risk score mean someone will develop cannabis use disorder?
No. Polygenic risk scores capture statistical tendencies across populations but predict poorly at the individual level.
What is fractional anisotropy?
A brain imaging measure of white matter integrity. Lower FA in adolescents with higher CUD genetic risk suggests subtle structural differences precede substance use.
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Cite This Study
https://rethinkthc.com/research/RTHC-06278APA
Cupertino, Renata Basso; Medland, Sarah Elizabeth; Ottino-Gonzalez, Jonatan; Cao, Zhipeng; Juliano, Anthony; Pancholi, Devarshi; Banaschewski, Tobias; Bokde, Arun L W; Desrivières, Sylvane; Flor, Herta; Grigis, Antoine; Gowland, Penny; Heinz, Andreas; Brühl, Rüdiger; Martinot, Jean-Luc; Martinot, Marie-Laure Paillère; Artiges, Eric; Nees, Frauke; Orfanos, Dimitri Papadopoulos; Lemaitre, Herve; Paus, Tomáš; Poustka, Luise; Hohmann, Sarah; Fröhner, Juliane H; Smolka, Michael N; Walter, Henrik; Whelan, Robert; Schumann, Gunter; Conrod, Patricia; Callas, Peter; Garavan, Hugh; Mackey, Scott. (2025). Impulsivity behaviors and white matter mediate the relationship between genetic risk for cannabis use disorder and early cannabis use in adolescents.. Addiction (Abingdon, England), 120(5), 984-996. https://doi.org/10.1111/add.16750
MLA
Cupertino, Renata Basso, et al. "Impulsivity behaviors and white matter mediate the relationship between genetic risk for cannabis use disorder and early cannabis use in adolescents.." Addiction (Abingdon, 2025. https://doi.org/10.1111/add.16750
RethinkTHC
RethinkTHC Research Database. "Impulsivity behaviors and white matter mediate the relations..." RTHC-06278. Retrieved from https://rethinkthc.com/research/cupertino-2025-impulsivity-behaviors-and-white
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.