Gene Variant Linked to How Childhood Sexual Abuse Relates to Cannabis Use and Aggression
Male carriers of the low-activity MAOA gene variant who experienced childhood sexual abuse were more likely to use cannabis for coping, but this combination appeared to buffer aggression levels.
Quick Facts
What This Study Found
Among 498 emerging adults, males with the low-activity MAOA gene variant (MAOA-L) who experienced childhood sexual abuse and used cannabis reported using it specifically for coping at higher rates than other groups. Surprisingly, the MAOA-L genotype in males appeared to buffer the impact of sexual abuse and heavy cannabis use on aggression measures.
Key Numbers
498 emerging adults genotyped. MAOA-L males with childhood sexual abuse history had higher coping-motivated cannabis use. MAOA-L appeared to buffer aggression in males with both sexual abuse history and high cannabis use. No significant effects found among females.
How They Did This
Cross-sectional genotyping study of 498 emerging adults. Assessed MAOA alleles (low vs high activity), childhood sexual abuse history, reactive and proactive aggression, and cannabis use patterns including coping motives.
Why This Research Matters
This gene-environment interaction study reveals that the relationship between trauma, cannabis use, and aggression is more complex than assumed. A genetic variant that increases vulnerability to coping-motivated cannabis use may paradoxically reduce aggression.
The Bigger Picture
Understanding gene-environment interactions could eventually help clinicians identify who is most at risk for problematic cannabis use after trauma, and who might actually experience some behavioral benefits.
What This Study Doesn't Tell Us
Cross-sectional design. Self-reported childhood sexual abuse. Single gene focus when multiple genes likely involved. Effects only observed in males. Relatively small sample for gene-environment interaction analysis.
Questions This Raises
- ?Is the aggression-buffering effect a direct result of cannabis use or the MAOA genotype?
- ?Would these findings replicate in larger, more diverse samples?
- ?What mechanisms explain the sex-specific effects?
Trust & Context
- Key Stat:
- MAOA-L genotype in males buffered aggression despite trauma and heavy cannabis use
- Evidence Grade:
- Cross-sectional genotyping study with moderate sample size; gene-environment interactions need replication.
- Study Age:
- 2025 study
- Original Title:
- Sex-Dependent Effects of MAOA Genotypes on the Relations Between Childhood Sexual Abuse, Aggression, and Cannabis Use in Emerging Adults.
- Published In:
- Journal of child sexual abuse, 34(4), 386-403 (2025)
- Authors:
- Fite, Paula J(2), Ryder, Annie L, Baca, Selena, Hossain, Waheeda A, Manzardo, Ann, Butler, Merlin G, Bortolato, Marco
- Database ID:
- RTHC-06463
Evidence Hierarchy
A snapshot of a population at one point in time.
What do these levels mean? →Frequently Asked Questions
What is the MAOA gene?
MAOA (Monoamine oxidase A) produces an enzyme that breaks down neurotransmitters like serotonin and dopamine. The low-activity variant (MAOA-L) has been previously linked to aggression when combined with childhood maltreatment.
Why were effects only seen in males?
MAOA is on the X chromosome, so males have only one copy while females have two. This makes the effects of any single MAOA variant more pronounced in males.
Read More on RethinkTHC
- cannabis-cardiovascular-heart-risk-stroke
- cannabis-heart-cardiovascular-risk
- coughing-up-stuff-after-quitting-weed
- lung-recovery-after-quitting-smoking-weed
- lung-recovery-quitting-weed
- quitting-weed-female-hormones
- quitting-weed-weight-gain-loss-diet-appetite
- sex-after-quitting-weed
- weed-DUI-driving-impaired-cannabis-laws
- weed-acne-skin
- weed-fertility-sperm
- weed-gut-digestion-problems
- weed-heart-health
- weed-testosterone-levels
Cite This Study
https://rethinkthc.com/research/RTHC-06463APA
Fite, Paula J; Ryder, Annie L; Baca, Selena; Hossain, Waheeda A; Manzardo, Ann; Butler, Merlin G; Bortolato, Marco. (2025). Sex-Dependent Effects of MAOA Genotypes on the Relations Between Childhood Sexual Abuse, Aggression, and Cannabis Use in Emerging Adults.. Journal of child sexual abuse, 34(4), 386-403. https://doi.org/10.1080/10538712.2025.2519575
MLA
Fite, Paula J, et al. "Sex-Dependent Effects of MAOA Genotypes on the Relations Between Childhood Sexual Abuse, Aggression, and Cannabis Use in Emerging Adults.." Journal of child sexual abuse, 2025. https://doi.org/10.1080/10538712.2025.2519575
RethinkTHC
RethinkTHC Research Database. "Sex-Dependent Effects of MAOA Genotypes on the Relations Bet..." RTHC-06463. Retrieved from https://rethinkthc.com/research/fite-2025-sexdependent-effects-of-maoa
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.