CBD Helps Rats Forget Meth-Associated Memories Through Dopamine Receptors in the Hippocampus
CBD accelerated extinction of methamphetamine-seeking behavior in rats and prevented relapse, and both effects required D1-like dopamine receptors in the dentate gyrus of the hippocampus.
Quick Facts
What This Study Found
CBD enhanced extinction of meth-conditioned place preference and prevented reinstatement. Blocking D1-like dopamine receptors in the dentate gyrus with SCH23390 reversed both of these CBD effects, establishing D1Rs as a necessary mediator.
Key Numbers
SCH23390 at 4 microg blocked CBD enhancement of extinction. SCH23390 at 1 and 4 microg reversed CBD prevention of reinstatement. CBD doses: 10 and 50 microg intracerebroventricular.
How They Did This
Male Wistar rats received the D1R antagonist SCH23390 at three doses into the dentate gyrus before intracerebroventricular CBD. Methamphetamine-conditioned place preference measured drug-seeking behavior during extinction and reinstatement.
Why This Research Matters
There are no FDA-approved treatments for methamphetamine use disorder. Understanding how CBD reduces drug-seeking behavior at the circuit level could inform development of targeted therapies.
The Bigger Picture
This study adds to evidence that CBD modulates addiction-related behaviors through the dopamine system, specifically in memory circuits. The hippocampus is critical for contextual memories that drive relapse.
What This Study Doesn't Tell Us
Rat model with intracerebroventricular CBD delivery, which does not mirror human oral or inhaled use. Only male rats tested. CPP is a simplified model of addiction that does not capture the full complexity of human drug-seeking.
Questions This Raises
- ?Would systemic CBD achieve sufficient concentrations in the dentate gyrus to produce these effects?
- ?Do D1 receptors play the same role in human meth addiction?
- ?Could CBD be combined with behavioral extinction therapy for clinical benefit?
Trust & Context
- Key Stat:
- D1 receptor blockade in the dentate gyrus reversed both of CBD anti-relapse effects
- Evidence Grade:
- Well-designed mechanistic animal study with dose-response data; moderate because multiple doses and clear antagonist reversal strengthen the finding.
- Study Age:
- 2025 study with current pharmacological methods
- Original Title:
- D1-like dopamine receptors in the dentate gyrus mediate cannabidiol's facilitation of extinction and prevention of reinstatement in methamphetamine-induced conditioned place preference.
- Published In:
- Pharmacology, biochemistry, and behavior, 256, 174094 (2025)
- Database ID:
- RTHC-06293
Evidence Hierarchy
Tests effects in animals (usually mice or rats), not humans.
What do these levels mean? →Frequently Asked Questions
Could CBD help people quit methamphetamine?
This rat study shows CBD can reduce meth-seeking behavior in an animal model, but translating this to human treatment requires clinical trials. The route of administration (directly into the brain) differs from how people would take CBD.
What role does the hippocampus play in addiction?
The hippocampus stores contextual memories, including memories of where and when drugs were used. These memories can trigger craving and relapse when a person encounters familiar drug-associated environments.
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Cite This Study
https://rethinkthc.com/research/RTHC-06293APA
Danesh, Elaheh; Saghafi, Mohammad; Mozafari, Roghayeh; Mesgar, Somaye; Haghparast, Abbas. (2025). D1-like dopamine receptors in the dentate gyrus mediate cannabidiol's facilitation of extinction and prevention of reinstatement in methamphetamine-induced conditioned place preference.. Pharmacology, biochemistry, and behavior, 256, 174094. https://doi.org/10.1016/j.pbb.2025.174094
MLA
Danesh, Elaheh, et al. "D1-like dopamine receptors in the dentate gyrus mediate cannabidiol's facilitation of extinction and prevention of reinstatement in methamphetamine-induced conditioned place preference.." Pharmacology, 2025. https://doi.org/10.1016/j.pbb.2025.174094
RethinkTHC
RethinkTHC Research Database. "D1-like dopamine receptors in the dentate gyrus mediate cann..." RTHC-06293. Retrieved from https://rethinkthc.com/research/danesh-2025-d1like-dopamine-receptors-in
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.