The terpene terpineol showed antidepressant effects in mice through cannabinoid and dopamine receptors
Terpineol, a terpene found in cannabis and other plants, reduced depressive-like behavior in mice through a mechanism involving both cannabinoid (CB1/CB2) and dopamine D2 receptors.
Quick Facts
What This Study Found
Terpineol at 100-200 mg/kg reduced immobility time in the tail suspension test. Its antidepressant-like effect was blocked by CB1 antagonist AM281, CB2 inverse agonist AM630, and dopamine D2 antagonist sulpiride, but not by caffeine or propranolol. Molecular docking confirmed CB1 and CB2 as promising binding targets.
Key Numbers
Effective at 100-200 mg/kg oral dose. Effects blocked by CB1, CB2, and D2 receptor antagonists. Not blocked by adenosine or beta-adrenergic antagonists.
How They Did This
LPS-induced depression model in mice with behavioral assessment via tail suspension test and splash test. Pharmacological blocking studies identified receptor mechanisms. Molecular docking analyses predicted binding affinity to cannabinoid and dopamine receptors.
Why This Research Matters
Terpenes are often overlooked components of cannabis. This study suggests terpineol may contribute to cannabis effects on mood through the endocannabinoid system, supporting the idea that non-cannabinoid compounds in cannabis have biological activity.
The Bigger Picture
If terpenes like terpineol have antidepressant properties mediated through cannabinoid receptors, this could help explain why different cannabis strains with varying terpene profiles produce different effects on mood.
What This Study Doesn't Tell Us
Animal study using high doses of oral terpineol that may not reflect levels achievable through cannabis use. LPS-induced depression is a simplified model. Molecular docking predictions need experimental validation of direct receptor binding.
Questions This Raises
- ?Does terpineol reach relevant concentrations in the brain during cannabis use?
- ?Would terpineol alone have antidepressant effects in humans?
- ?How do terpene profiles interact with cannabinoids to influence mood?
Trust & Context
- Key Stat:
- Antidepressant effect blocked by both CB1 and CB2 antagonists
- Evidence Grade:
- Preclinical animal study with pharmacological mechanism validation, but high doses and simplified depression model limit translational relevance.
- Study Age:
- 2020 animal study. Early research into terpene-cannabinoid receptor interactions relevant to mood.
- Original Title:
- Antidepressant-Like Effect of Terpineol in an Inflammatory Model of Depression: Involvement of the Cannabinoid System and D2 Dopamine Receptor.
- Published In:
- Biomolecules, 10(5) (2020)
- Authors:
- Vieira, Graziela, Cavalli, Juliana, Gonçalves, Elaine C D, Braga, Saulo F P, Ferreira, Rafaela S, Santos, Adair R S, Cola, Maíra, Raposo, Nádia R B, Capasso, Raffaele, Dutra, Rafael C
- Database ID:
- RTHC-02897
Evidence Hierarchy
Tests effects in animals (usually mice or rats), not humans.
What do these levels mean? →Frequently Asked Questions
What is terpineol?
Terpineol is a monoterpenoid alcohol found in cannabis, eucalyptus, lilacs, and other plants. It has known immunomodulatory and neuroprotective properties, and this study found it also has antidepressant-like effects.
How does terpineol relate to cannabis?
Terpineol is one of many terpenes found in cannabis that may contribute to the plant's overall effects. This study suggests it acts through the same cannabinoid receptors that THC and CBD interact with.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-02897APA
Vieira, Graziela; Cavalli, Juliana; Gonçalves, Elaine C D; Braga, Saulo F P; Ferreira, Rafaela S; Santos, Adair R S; Cola, Maíra; Raposo, Nádia R B; Capasso, Raffaele; Dutra, Rafael C. (2020). Antidepressant-Like Effect of Terpineol in an Inflammatory Model of Depression: Involvement of the Cannabinoid System and D2 Dopamine Receptor.. Biomolecules, 10(5). https://doi.org/10.3390/biom10050792
MLA
Vieira, Graziela, et al. "Antidepressant-Like Effect of Terpineol in an Inflammatory Model of Depression: Involvement of the Cannabinoid System and D2 Dopamine Receptor.." Biomolecules, 2020. https://doi.org/10.3390/biom10050792
RethinkTHC
RethinkTHC Research Database. "Antidepressant-Like Effect of Terpineol in an Inflammatory M..." RTHC-02897. Retrieved from https://rethinkthc.com/research/vieira-2020-antidepressantlike-effect-of-terpineol
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.