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Psychiatry Res. 2018 Apr;262:357-358. doi: 10.1016/j.psychres.2017.09.006. Epub 2017 Sep 9.

ABCB1 C3435T polymorphism is associated with tetrahydrocannabinol blood levels in heavy cannabis users.

Author information

1
Service d'addictologie « Moreau de Tours » - Centre hospitalier Sainte-Anne, 1, rue Cabanis, 75014 Paris, France; Laboratory of Pathophysiology of Psychiatric Diseases, Center for Psychiatry & Neurosciences, INSERM, U894, University Paris Descartes, 102-108 rue de la Santé, 75014 Paris, France. Electronic address: oussama.kebir@inserm.fr.
2
Paul Brousse Hospital, Department of Addictology and Psychiatry, Villejuif 94800, France; Université Paris-Sud, U1178, France; Inserm 1178, Paris, France.
3
Laboratory of Pathophysiology of Psychiatric Diseases, Center for Psychiatry & Neurosciences, INSERM, U894, University Paris Descartes, 102-108 rue de la Santé, 75014 Paris, France.
4
Unité de Psychiatrie d'Urgence, de Liaison et de Recherche, Pôle 93G04. EPS Ville Evrard, France.
5
Service d'addictologie « Moreau de Tours » - Centre hospitalier Sainte-Anne, 1, rue Cabanis, 75014 Paris, France.
6
Paul Brousse Hospital, Department of Addictology and Psychiatry, Villejuif 94800, France; Université Paris-Sud, U1178, France; Inserm 1178, Paris, France.

Abstract

ABCB1 polymorphisms are known to modify drug pharmacokinetics but have yet to be studied for their role in generating and maintaining cannabis dependence. The objective of this study is to determine if ABCB1 C3435T (rs1045642) polymorphism may modulate Δ9-Tetrahydrocannabinol (THC) blood levels in a sample of heavy cannabis users. The study sample includes 39 Caucasian individuals, recruited in two French addictology centres, with isolated cannabis dependence and heavy use (defined as ≥ 7 joints per week). Each underwent clinical evaluation, cannabis blood metabolite dosage (THC, 11-OH-THC, and THC-COOH) and genotyping of ABCB1 C3435T polymorphism. In this population (males: 74.4%, average age 29.5 +/- 9), average cannabis use was 21 joints per week (median 12; range 7 - 80). T carriers (TT/CT) had significantly lower plasma THC levels (ng/ml) versus non T carriers (8 vs 15.70, significant), controlling for level of weekly use, 11-OH-THC and THC-COOH levels. Our results show that ABCB1 C3435T polymorphism may modulate serum THC levels in chronic heavy cannabis users. The exact mechanisms and roles that this may play in cannabis dependence genesis and evolution remain to be elucidated. These results should be controlled in a replication study using a larger population.

KEYWORDS:

ABCB1; Cannabinoids; Cannabis use disorder; P-glycoprotein 1; Pharmacogenetics; Pharmacokinetics

PMID:
28917442
DOI:
10.1016/j.psychres.2017.09.006
[Indexed for MEDLINE]

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