Cited by 157Drug Transport and Resistance MechanismsCannabis and Cannabinoid ResearchAntibiotic Resistance in Bacteria

The effects of cannabinoids on P-glycoprotein transport and expression in multidrug resistant cells

Holland, M.L., Panetta, J.A., Hoskins, J.M., Bebawy, M., Roufogalis, B.D., Allen, J.D., Arnold, J.C.·2006·Biochemical Pharmacology

Abstract

Cannabis is the most widely used illicit drug in the world. Cannabinoids are used therapeutically by some patients as they have analgesic, anti-emetic and appetite stimulant properties which palliate adverse symptoms. Use of these agents in an oncology setting raises the question of whether they act to modulate the effectiveness of concurrently administered anti-cancer drugs. The transporter, P-glycoprotein (P-gp) confers multiple drug resistance (MDR) by effluxing a diverse array of anti-cancer agents. This study was undertaken to examine the effect of cannabinoids on P-gp. Unlike the known P-gp inhibitor, PSC833, short 1h exposure to three plant-derived cannabinoids, cannabinol (CBN), cannabidiol (CBD) and Delta(9)-tetrahydrocannabinol (THC) and the synthetic cannabinoid receptor agonist, WIN55, 212-2 (WIN) did not inhibit the efflux of the P-gp substrate Rhodamine 123 (Rh123) in either a drug-selected human T lymphoblastoid leukaemia cell line (CEM/VLB(100)) or in a mouse fibroblast MDR1 transfected cell line (77.1). However, in CEM/VLB(100) cells, prolonged 72 h exposure to the cannabinoids, THC and CBD, decreased P-gp expression to a similar extent as the flavonoid, curcumin (turmeric). This correlated with an increase in intracellular accumulation of Rh123 and enhanced sensitivity of the cells to the cytotoxic actions of the P-gp substrate, vinblastine. Taken together, these results provide preliminary evidence that cannabinoids do not exacerbate P-gp mediated MDR. Further, plant-derived cannabinoids are moderately effective in reversing MDR in CEM/VLB(100) cells by decreasing P-gp expression.

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Crossref · 10.1016/j.bcp.2005.12.033

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Authors
Holland, M. L., Panetta, J. A., Hoskins, J. M., Bebawy, M., Roufogalis, B. D., Allen, J. D., & Arnold, J. C.
Affiliations
  • The University of Sydney (AU)
  • Centenary Institute (AU)
Corresponding author
Arnold, J.C.
Venue
Biochemical Pharmacology
Publisher
Elsevier BV
Published
2006-04
Volume
71
Issue
8
Pages
1146-1154
ISSN
0006-2952 (ISSN-L)
OpenAlex
W2133500154
Cited by
157
References
47
Citations by year
2026: 3 · 2025: 9 · 2024: 9 · 2023: 12 · 2022: 16 · 2021: 14 · 2020: 20 · 2019: 13 · 2018: 10 · 2017: 3 · 2016: 10 · 2015: 2 · 2014: 3 · 2013: 10 · 2012: 5
FWCI
2.43
Type
journal article
Language
en
Open access
closed
Locations
  • Biochemical Pharmacology (publishedVersion)
  • PubMed (publishedVersion)
  • UTS ePRESS (University of Technology Sydney) (submittedVersion)
Topics
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
  • Health Sciences › Medicine › Pharmacology › Cannabis and Cannabinoid Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Medicine › Antibiotic Resistance in Bacteria
Keywords
cannabinoids, P-glycoprotein, multidrug resistance, drug efflux, cannabinol, cannabidiol, tetrahydrocannabinol, WIN 55,212-2, curcumin, rhodamine 123, vinblastine, MDR1, drug resistance reversal
MeSH terms
Antineoplastic Agents, Cannabinoids, Cell Survival, Dose-Response Relationship, Drug, Humans, Drug Resistance, Multiple, Drug Resistance, Neoplasm, ATP Binding Cassette Transporter, Subfamily B, Member 1, Protein Transport, Cell Line, Tumor

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