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Cannabidiol, a major phytocannabinoid, as a potent atypical inhibitor for CYP2D6.
Drug Metab Dispos 2011; 39(11):2049-56DM

Abstract

Δ(9)-Tetrahydrocannabinol, cannabidiol (CBD), and cannabinol are the three major cannabinoids contained in marijuana, which are devoid of nitrogen atoms in their structures. In this study, we investigated the inhibitory effects of the major phytocannabinoids on the catalytic activity of human CYP2D6. These major cannabinoids inhibited the 3-[2-(N,N-diethyl-N-methylammonium)ethyl]-7-methoxy-4-methylcoumarin (AMMC) and dextromethorphan O-demethylase activities of recombinant CYP2D6 and pooled human liver microsomes in a concentration-dependent manner (IC(50) = 4.01-24.9 μM), indicating the strongest inhibitory potency of CBD. However, these cannabinoids showed no or weak metabolism-dependent inhibition. CBD competitively inhibited the CYP2D6 activities with the apparent K(i) values of 1.16 to 2.69 μM. To clarify the structural requirement for CBD-mediated CYP2D6 inhibition, effects of CBD-related compounds on the AMMC O-demethylase activity of recombinant CYP2D6 were examined. Olivetol (IC(50) = 7.21 μM) inhibited CYP2D6 activity as potently as CBD did (IC(50) = 6.52 μM), whereas d-limonene did not show any inhibitory effect. Pentylbenzene failed to inhibit CYP2D6 activity. Furthermore, neither monomethyl nor dimethyl ethers of CBD inhibited the activity. Cannabidivarin having a propyl side chain inhibited CYP2D6 activity; its inhibitory effect (IC(50) = 10.2 μM) was less potent than that of CBD. On the other hand, orcinol and resorcinol showed lack of inhibition. The inhibitory effect of CBD on CYP2D6 activity was more potent than those of 16 compounds without nitrogen atoms tested, such as progesterone. These results indicated that CBD caused potent direct CYP2D6 inhibition, in which two phenolic hydroxyl groups and the pentyl side chain of CBD may play important roles.

Authors+Show Affiliations

Department of Hygienic Chemistry, Faculty of Pharmaceutical Sciences, Hokuriku University, Ho-3, Kanagawa-machi, Kanazawa 920-1181, Japan.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21821735

Citation

Yamaori, Satoshi, et al. "Cannabidiol, a Major Phytocannabinoid, as a Potent Atypical Inhibitor for CYP2D6." Drug Metabolism and Disposition: the Biological Fate of Chemicals, vol. 39, no. 11, 2011, pp. 2049-56.
Yamaori S, Okamoto Y, Yamamoto I, et al. Cannabidiol, a major phytocannabinoid, as a potent atypical inhibitor for CYP2D6. Drug Metab Dispos. 2011;39(11):2049-56.
Yamaori, S., Okamoto, Y., Yamamoto, I., & Watanabe, K. (2011). Cannabidiol, a major phytocannabinoid, as a potent atypical inhibitor for CYP2D6. Drug Metabolism and Disposition: the Biological Fate of Chemicals, 39(11), pp. 2049-56. doi:10.1124/dmd.111.041384.
Yamaori S, et al. Cannabidiol, a Major Phytocannabinoid, as a Potent Atypical Inhibitor for CYP2D6. Drug Metab Dispos. 2011;39(11):2049-56. PubMed PMID: 21821735.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Cannabidiol, a major phytocannabinoid, as a potent atypical inhibitor for CYP2D6. AU - Yamaori,Satoshi, AU - Okamoto,Yasuka, AU - Yamamoto,Ikuo, AU - Watanabe,Kazuhito, Y1 - 2011/08/05/ PY - 2011/8/9/entrez PY - 2011/8/9/pubmed PY - 2012/5/4/medline SP - 2049 EP - 56 JF - Drug metabolism and disposition: the biological fate of chemicals JO - Drug Metab. Dispos. VL - 39 IS - 11 N2 - Δ(9)-Tetrahydrocannabinol, cannabidiol (CBD), and cannabinol are the three major cannabinoids contained in marijuana, which are devoid of nitrogen atoms in their structures. In this study, we investigated the inhibitory effects of the major phytocannabinoids on the catalytic activity of human CYP2D6. These major cannabinoids inhibited the 3-[2-(N,N-diethyl-N-methylammonium)ethyl]-7-methoxy-4-methylcoumarin (AMMC) and dextromethorphan O-demethylase activities of recombinant CYP2D6 and pooled human liver microsomes in a concentration-dependent manner (IC(50) = 4.01-24.9 μM), indicating the strongest inhibitory potency of CBD. However, these cannabinoids showed no or weak metabolism-dependent inhibition. CBD competitively inhibited the CYP2D6 activities with the apparent K(i) values of 1.16 to 2.69 μM. To clarify the structural requirement for CBD-mediated CYP2D6 inhibition, effects of CBD-related compounds on the AMMC O-demethylase activity of recombinant CYP2D6 were examined. Olivetol (IC(50) = 7.21 μM) inhibited CYP2D6 activity as potently as CBD did (IC(50) = 6.52 μM), whereas d-limonene did not show any inhibitory effect. Pentylbenzene failed to inhibit CYP2D6 activity. Furthermore, neither monomethyl nor dimethyl ethers of CBD inhibited the activity. Cannabidivarin having a propyl side chain inhibited CYP2D6 activity; its inhibitory effect (IC(50) = 10.2 μM) was less potent than that of CBD. On the other hand, orcinol and resorcinol showed lack of inhibition. The inhibitory effect of CBD on CYP2D6 activity was more potent than those of 16 compounds without nitrogen atoms tested, such as progesterone. These results indicated that CBD caused potent direct CYP2D6 inhibition, in which two phenolic hydroxyl groups and the pentyl side chain of CBD may play important roles. SN - 1521-009X UR - https://www.unboundmedicine.com/medline/citation/21821735/abstract/Cannabidiol_a_major_phytocannabinoid_as_a_potent_atypical_inhibitor_for_CYP2D6_ L2 - http://dmd.aspetjournals.org/cgi/pmidlookup?view=long&pmid=21821735 DB - PRIME DP - Unbound Medicine ER -