Involvement of dopamine receptor in the actions of non-psychoactive phytocannabinoids.

Autor: Shrader SH; Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY, 40292, United States., Tong YG; Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY, 40292, United States., Duff MB; Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY, 40292, United States., Freedman JH; Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY, 40292, United States., Song ZH; Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY, 40292, United States. Electronic address: zhsong@louisville.edu.
Jazyk: angličtina
Zdroj: Biochemical and biophysical research communications [Biochem Biophys Res Commun] 2020 Dec 17; Vol. 533 (4), pp. 1366-1370. Date of Electronic Publication: 2020 Oct 21.
DOI: 10.1016/j.bbrc.2020.10.021
Abstrakt: Nematode Caenorhabditis elegans (C. elegans) exhibited a vigorous swimming behavior in liquid medium. Addition of dopamine inhibited the swimming behavior, causing paralysis in 65% of wild-type nematodes. Interestingly, phytocannabinoids cannabidiol (CBD) or cannabidivarin (CBDV), caused paralysis in 40% of the animals. Knockout of DOP-3, the dopamine D2-like receptor critical for locomotor behavior, eliminated the paralysis induced by dopamine, CBD, and CBDV. In contrast, both CBD and CBDV caused paralysis in animals lacking CAT-2, an enzyme necessary for dopamine synthesis. Co-administration of dopamine with either CBD or CBDV caused paralysis similar to that of either phytocannabinoid treatment alone. These data support the notion that CBD and CBDV act as functional partial agonists on dopamine D2-like receptors in vivo. The discovery that dopamine receptor is involved in the actions of phytocannabinoids moves a significant step toward our understanding of the mechanisms for medical uses of cannabis in the treatment of neurological and psychiatric disorders.
(Copyright © 2020 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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