Largest genetic study of cannabis use disorder identifies 22 risk genes
A massive genetic analysis of over 384,000 people identified 22 genome regions linked to cannabis use disorder risk, with significant genetic overlap with other psychiatric conditions.
Quick Facts
What This Study Found
This GWAS meta-analysis identified 22 genome-wide significant loci associated with cannabis use disorder, with SNP-based heritability estimated at 11%. Strong genetic correlations were found with other substance use disorders, ADHD, major depression, and schizophrenia.
Key Numbers
384,032 participants; 42,281 CUD cases; 22 genome-wide significant loci; SNP heritability of 11%; published in Lancet Psychiatry.
How They Did This
Genome-wide association study meta-analysis combining data from multiple cohorts totaling 384,032 participants of European ancestry, including 42,281 CUD cases.
Why This Research Matters
This is one of the largest genetic studies of cannabis use disorder ever conducted. It provides the clearest picture yet of the biological architecture of problematic cannabis use and its genetic connections to other psychiatric conditions.
The Bigger Picture
The strong genetic overlap between cannabis use disorder and conditions like ADHD, depression, and schizophrenia suggests shared biological pathways. This could eventually lead to better screening tools and targeted interventions for those at highest genetic risk.
What This Study Doesn't Tell Us
Limited to European ancestry, reducing generalizability to other populations. Common genetic variants explain only a fraction of total heritability. Genetic associations do not imply simple causal mechanisms.
Questions This Raises
- ?Will these findings replicate in diverse ancestry groups?
- ?Can polygenic risk scores eventually be used clinically to identify high-risk individuals before problems develop?
Trust & Context
- Key Stat:
- 22 genome-wide significant loci identified across 384,032 participants
- Evidence Grade:
- Strong: massive sample size, rigorous GWAS methodology, published in top-tier journal (Lancet Psychiatry).
- Study Age:
- Published 2023.
- Original Title:
- A large-scale genome-wide association study meta-analysis of cannabis use disorder.
- Published In:
- The lancet. Psychiatry, 7(12), 1032-1045 (2020)
- Authors:
- Johnson, Emma C(17), Demontis, Ditte(4), Thorgeirsson, Thorgeir E(2), Walters, Raymond K, Polimanti, Renato, Hatoum, Alexander S, Sanchez-Roige, Sandra, Paul, Sarah E, Wendt, Frank R, Clarke, Toni-Kim, Lai, Dongbing, Reginsson, Gunnar W, Zhou, Hang, He, June, Baranger, David A A, Gudbjartsson, Daniel F, Wedow, Robbee, Adkins, Daniel E, Adkins, Amy E, Alexander, Jeffry, Bacanu, Silviu-Alin, Bigdeli, Tim B, Boden, Joseph, Brown, Sandra A, Bucholz, Kathleen K, Bybjerg-Grauholm, Jonas, Corley, Robin P, Degenhardt, Louisa, Dick, Danielle M, Domingue, Benjamin W, Fox, Louis, Goate, Alison M, Gordon, Scott D, Hack, Laura M, Hancock, Dana B, Hartz, Sarah M, Hickie, Ian B, Hougaard, David M, Krauter, Kenneth, Lind, Penelope A, McClintick, Jeanette N, McQueen, Matthew B, Meyers, Jacquelyn L, Montgomery, Grant W, Mors, Ole, Mortensen, Preben B, Nordentoft, Merete, Pearson, John F, Peterson, Roseann E, Reynolds, Maureen D, Rice, John P, Runarsdottir, Valgerdur, Saccone, Nancy L, Sherva, Richard, Silberg, Judy L, Tarter, Ralph E, Tyrfingsson, Thorarinn, Wall, Tamara L, Webb, Bradley T, Werge, Thomas, Wetherill, Leah, Wright, Margaret J, Zellers, Stephanie, Adams, Mark J, Bierut, Laura J, Boardman, Jason D, Copeland, William E, Farrer, Lindsay A, Foroud, Tatiana M, Gillespie, Nathan A, Grucza, Richard A, Harris, Kathleen Mullan, Heath, Andrew C, Hesselbrock, Victor, Hewitt, John K, Hopfer, Christian J, Horwood, John, Iacono, William G, Johnson, Eric O, Kendler, Kenneth S, Kennedy, Martin A, Kranzler, Henry R, Madden, Pamela A F, Maes, Hermine H, Maher, Brion S, Martin, Nicholas G, McGue, Matthew, McIntosh, Andrew M, Medland, Sarah E, Nelson, Elliot C, Porjesz, Bernice, Riley, Brien P, Stallings, Michael C, Vanyukov, Michael M, Vrieze, Scott, Davis, Lea K, Bogdan, Ryan, Gelernter, Joel, Edenberg, Howard J, Stefansson, Kari, Børglum, Anders D, Agrawal, Arpana
- Database ID:
- RTHC-02633
Evidence Hierarchy
Combines results from multiple studies to find an overall pattern.
What do these levels mean? →Frequently Asked Questions
How heritable is cannabis use disorder?
This study estimated SNP-based heritability at about 11%, meaning common genetic variants account for roughly 11% of the variation in CUD risk. Total heritability from twin studies is estimated higher (50-70%).
Which psychiatric conditions share genetic risk with cannabis use disorder?
Significant genetic correlations were found with other substance use disorders, ADHD, major depressive disorder, and schizophrenia.
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Cite This Study
https://rethinkthc.com/research/RTHC-02633APA
Johnson, Emma C; Demontis, Ditte; Thorgeirsson, Thorgeir E; Walters, Raymond K; Polimanti, Renato; Hatoum, Alexander S; Sanchez-Roige, Sandra; Paul, Sarah E; Wendt, Frank R; Clarke, Toni-Kim; Lai, Dongbing; Reginsson, Gunnar W; Zhou, Hang; He, June; Baranger, David A A; Gudbjartsson, Daniel F; Wedow, Robbee; Adkins, Daniel E; Adkins, Amy E; Alexander, Jeffry; Bacanu, Silviu-Alin; Bigdeli, Tim B; Boden, Joseph; Brown, Sandra A; Bucholz, Kathleen K; Bybjerg-Grauholm, Jonas; Corley, Robin P; Degenhardt, Louisa; Dick, Danielle M; Domingue, Benjamin W; Fox, Louis; Goate, Alison M; Gordon, Scott D; Hack, Laura M; Hancock, Dana B; Hartz, Sarah M; Hickie, Ian B; Hougaard, David M; Krauter, Kenneth; Lind, Penelope A; McClintick, Jeanette N; McQueen, Matthew B; Meyers, Jacquelyn L; Montgomery, Grant W; Mors, Ole; Mortensen, Preben B; Nordentoft, Merete; Pearson, John F; Peterson, Roseann E; Reynolds, Maureen D; Rice, John P; Runarsdottir, Valgerdur; Saccone, Nancy L; Sherva, Richard; Silberg, Judy L; Tarter, Ralph E; Tyrfingsson, Thorarinn; Wall, Tamara L; Webb, Bradley T; Werge, Thomas; Wetherill, Leah; Wright, Margaret J; Zellers, Stephanie; Adams, Mark J; Bierut, Laura J; Boardman, Jason D; Copeland, William E; Farrer, Lindsay A; Foroud, Tatiana M; Gillespie, Nathan A; Grucza, Richard A; Harris, Kathleen Mullan; Heath, Andrew C; Hesselbrock, Victor; Hewitt, John K; Hopfer, Christian J; Horwood, John; Iacono, William G; Johnson, Eric O; Kendler, Kenneth S; Kennedy, Martin A; Kranzler, Henry R; Madden, Pamela A F; Maes, Hermine H; Maher, Brion S; Martin, Nicholas G; McGue, Matthew; McIntosh, Andrew M; Medland, Sarah E; Nelson, Elliot C; Porjesz, Bernice; Riley, Brien P; Stallings, Michael C; Vanyukov, Michael M; Vrieze, Scott; Davis, Lea K; Bogdan, Ryan; Gelernter, Joel; Edenberg, Howard J; Stefansson, Kari; Børglum, Anders D; Agrawal, Arpana. (2020). A large-scale genome-wide association study meta-analysis of cannabis use disorder.. The lancet. Psychiatry, 7(12), 1032-1045. https://doi.org/10.1016/S2215-0366(20)30339-4
MLA
Johnson, Emma C, et al. "A large-scale genome-wide association study meta-analysis of cannabis use disorder.." The lancet. Psychiatry, 2020. https://doi.org/10.1016/S2215-0366(20)30339-4
RethinkTHC
RethinkTHC Research Database. "A large-scale genome-wide association study meta-analysis of..." RTHC-02633. Retrieved from https://rethinkthc.com/research/johnson-2020-a-largescale-genomewide-association
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.