The endocannabinoid and stress hormone systems interact in complex ways to influence psychosis risk
A systematic review of 41 studies found the endocannabinoid and HPA stress systems show interconnected alterations in psychosis, with THC affecting the stress axis and childhood trauma affecting endocannabinoid signaling.
Quick Facts
What This Study Found
Both systems show independent contributions to psychosis risk, but they also interact bidirectionally: cannabis use affects endocannabinoid tone, stress exposure alters the HPA axis, and crucially, THC also affects the HPA axis while childhood trauma affects endocannabinoid signaling, revealing cross-system perturbation.
Key Numbers
41 studies reviewed. 9 HPA-related biological studies. 2 endocannabinoid-related biological studies. 29 environmental-measure studies. 1 genetic study. CNR1 genetic variation identified as a cross-system factor.
How They Did This
PRISMA-compliant systematic review searching PubMed, Web of Science, and Scopus. 41 eligible studies extracted, including biological interventional and non-interventional studies, environmental-measure studies, and genetic studies examining the interplay of HPA and endocannabinoid systems in psychosis.
Why This Research Matters
The stress-diathesis model and cannabinoid hypothesis of schizophrenia have been studied independently. This review reveals they are deeply interconnected, suggesting that cannabis risk for psychosis cannot be understood without considering stress, and vice versa.
The Bigger Picture
Understanding psychosis risk requires looking at the interplay between genetic vulnerability, cannabis use, stress exposure, and biological systems. This review argues for a unified model rather than studying cannabis and stress as separate risk factors.
What This Study Doesn't Tell Us
Heterogeneous study designs limit direct comparisons. Many included studies measured environmental factors (cannabis use, stress) rather than biological endocannabinoid or HPA markers. The mechanistic evidence is stronger for within-system than cross-system effects.
Questions This Raises
- ?Could interventions targeting both the HPA axis and endocannabinoid system simultaneously reduce psychosis risk?
- ?Does the timing of stress relative to cannabis exposure matter for the cross-system interaction?
- ?Are there genetic profiles that make the interaction particularly dangerous?
Trust & Context
- Key Stat:
- Bidirectional interaction between endocannabinoid and stress systems in psychosis
- Evidence Grade:
- PRISMA-compliant systematic review synthesizing 41 studies. Evidence is consistent but mostly correlational, with limited interventional data for cross-system effects.
- Study Age:
- Published in 2024 in Current Neuropharmacology.
- Original Title:
- Biobehavioral Interactions between Endocannabinoid and Hypothalamicpituitary- adrenal Systems in Psychosis: A Systematic Review.
- Published In:
- Current neuropharmacology, 22(3), 495-520 (2024)
- Authors:
- Colizzi, Marco(10), Bortoletto, Riccardo(2), Antolini, Giulia, Bhattacharyya, Sagnik, Balestrieri, Matteo, Solmi, Marco
- Database ID:
- RTHC-05218
Evidence Hierarchy
Analyzes all available research on a topic using a structured method.
What do these levels mean? →Frequently Asked Questions
How do cannabis and stress interact to affect psychosis risk?
This review found the two systems work in both directions: THC directly affects stress hormones, while stressful experiences like childhood trauma alter the endocannabinoid system. Both pathways independently and together contribute to psychosis risk.
Can you separate cannabis risk from stress risk for psychosis?
This review suggests not easily. The endocannabinoid system and stress response system are so interconnected that cannabis use in the context of stress may be more risky than either factor alone.
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Cite This Study
https://rethinkthc.com/research/RTHC-05218APA
Colizzi, Marco; Bortoletto, Riccardo; Antolini, Giulia; Bhattacharyya, Sagnik; Balestrieri, Matteo; Solmi, Marco. (2024). Biobehavioral Interactions between Endocannabinoid and Hypothalamicpituitary- adrenal Systems in Psychosis: A Systematic Review.. Current neuropharmacology, 22(3), 495-520. https://doi.org/10.2174/1570159X21666230801150032
MLA
Colizzi, Marco, et al. "Biobehavioral Interactions between Endocannabinoid and Hypothalamicpituitary- adrenal Systems in Psychosis: A Systematic Review.." Current neuropharmacology, 2024. https://doi.org/10.2174/1570159X21666230801150032
RethinkTHC
RethinkTHC Research Database. "Biobehavioral Interactions between Endocannabinoid and Hypot..." RTHC-05218. Retrieved from https://rethinkthc.com/research/colizzi-2024-biobehavioral-interactions-between-endocannabinoid
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.