CB2 receptor manipulation reduced alcohol reward in mice while endocannabinoid levels dropped in brain reward regions
Alcohol conditioning reduced endocannabinoid levels in brain reward circuits, and pharmacological CB2 receptor manipulation altered alcohol's rewarding properties in mice.
Quick Facts
What This Study Found
Alcohol-conditioned place preference was associated with decreased anandamide and other N-acylethanolamines in the medial prefrontal cortex and ventral midbrain. Blocking CB2 receptors during conditioning reduced alcohol reward. However, activating CB2 reduced both alcohol AND food reward, suggesting a non-specific effect on reward processing.
Key Numbers
Anandamide and other N-acylethanolamines were markedly decreased in medial prefrontal cortex and ventral midbrain of alcohol-conditioned mice. AM630 (CB2 antagonist) reduced alcohol CPP during acquisition.
How They Did This
Conditioned place preference (CPP) paradigm in C57BL/6 mice with endocannabinoid level measurement in brain regions (LC-MS/MS). CB2 receptor agonist (JWH133) and antagonist (AM630) administered during acquisition phase.
Why This Research Matters
Understanding how the endocannabinoid system mediates alcohol reward could inform treatments for alcohol use disorder. CB2 receptors are of particular interest because they can be targeted without the psychoactive effects of CB1 manipulation.
The Bigger Picture
The endocannabinoid system is increasingly recognized as a modulator of multiple types of reward. This study adds evidence that CB2 receptors specifically influence alcohol reward, expanding the potential therapeutic toolkit for addiction beyond traditional approaches.
What This Study Doesn't Tell Us
Mouse model of alcohol preference, not addiction. CB2 agonist reduced food reward too, raising selectivity concerns. Acute pharmacological manipulation may not predict chronic treatment effects.
Questions This Raises
- ?Could CB2-targeted treatments reduce alcohol craving in humans without affecting normal reward processing?
- ?Can the non-specific reward suppression of CB2 agonists be refined through drug design?
Trust & Context
- Key Stat:
- CB2 modulated alcohol reward
- Evidence Grade:
- Preliminary: mouse behavioral and biochemical study.
- Study Age:
- Published in 2019.
- Original Title:
- Alcohol-induced conditioned place preference is modulated by CB2 cannabinoid receptors and modifies levels of endocannabinoids in the mesocorticolimbic system.
- Published In:
- Pharmacology, biochemistry, and behavior, 183, 22-31 (2019)
- Authors:
- Martín-Sánchez, Ana, Warnault, Vincent, Montagud-Romero, Sandra, Pastor, Antoni, Mondragón, Neus, De La Torre, Rafael, Valverde, Olga
- Database ID:
- RTHC-02161
Evidence Hierarchy
Tests effects in animals (usually mice or rats), not humans.
What do these levels mean? →Frequently Asked Questions
Could cannabinoid drugs treat alcohol addiction?
This mouse study found CB2 receptor manipulation affected alcohol reward, but the CB2 agonist also reduced food reward, suggesting the effect may not be specific enough for clinical use yet.
How does alcohol affect the endocannabinoid system?
Repeated alcohol exposure during conditioning decreased anandamide and related compounds in brain reward regions, suggesting alcohol disrupts normal endocannabinoid signaling.
Read More on RethinkTHC
- cannabis-dependence-physical-psychological-addiction-science
- cannabis-perception-vs-evidence-gap
- cannabis-use-disorder-test
- cross-addiction-quit-weed-start-drinking
- is-weed-addictive
- is-weed-addictive-science
- quitting-weed-and-alcohol
- rehab-for-weed-addiction-necessary
- signs-of-cannabis-use-disorder
- weed-vape-pen-addiction
Cite This Study
https://rethinkthc.com/research/RTHC-02161APA
Martín-Sánchez, Ana; Warnault, Vincent; Montagud-Romero, Sandra; Pastor, Antoni; Mondragón, Neus; De La Torre, Rafael; Valverde, Olga. (2019). Alcohol-induced conditioned place preference is modulated by CB2 cannabinoid receptors and modifies levels of endocannabinoids in the mesocorticolimbic system.. Pharmacology, biochemistry, and behavior, 183, 22-31. https://doi.org/10.1016/j.pbb.2019.06.007
MLA
Martín-Sánchez, Ana, et al. "Alcohol-induced conditioned place preference is modulated by CB2 cannabinoid receptors and modifies levels of endocannabinoids in the mesocorticolimbic system.." Pharmacology, 2019. https://doi.org/10.1016/j.pbb.2019.06.007
RethinkTHC
RethinkTHC Research Database. "Alcohol-induced conditioned place preference is modulated by..." RTHC-02161. Retrieved from https://rethinkthc.com/research/martin-sanchez-2019-alcoholinduced-conditioned-place-preference
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.