The present findings suggest that β-Caryophyllene has significant anti-nicotine effects.
β-Caryophyllene, a dietary terpenoid, inhibits nicotine taking and nicotine seeking in rodents.
AI Summary
Key Findings
Abstract
BACKGROUND AND PURPOSE: β-Caryophyllene (BCP) is a plant-derived terpenoid used as a food additive for many decades. Recent studies indicate that BCP is a cannabinoid CBreceptor agonist with medical benefits for a number of human diseases. However, little is known about its therapeutic potential for drug abuse and addiction. EXPERIMENT APPROACH: We used pharmacological, transgenic, and optogenetic approaches to systematically evaluate the effects of BCP on nicotine-taking and nicotine-seeking behaviour in animal models of drug self-administration, electrical, and optical brain-stimulation reward. KEY RESULTS: Systemic administration of BCP dose-dependently inhibited nicotine self-administration and motivation for nicotine seeking in rats and mice. The reduction in nicotine self-administration was blocked by AM630, a selective CBreceptor antagonist, but not by AM251, a selective CBreceptor antagonist, suggesting involvement of a CBreceptor mechanism. Genetic deletion of CBreceptors in mice blocked the reduction in nicotine self-administration produced only by low doses, but not by high doses, of BCP, suggesting involvement of both CBand non-CBreceptor mechanisms. Furthermore, in the intracranial self-stimulation paradigm, BCP attenuated electrical brain-stimulation reward and nicotine-enhanced brain-stimulation reward in rats. Lastly, BCP also attenuated brain-stimulation reward maintained by optogenetic stimulation of dopaminergic neurons in the ventral tegmental area in DAT-cre mice, suggesting the involvement of a dopamine-dependent mechanism in BCP's action. CONCLUSIONS AND IMPLICATIONS: The present findings suggest that BCP has significant anti-nicotine effects via both CBand non-CBreceptor mechanisms and, therefore, deserves further study as a potential new pharmacotherapy for cigarette smoking cessation.
Affiliation
Yi He
External References
- PubMed ID:
- 31883107
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