Abstract
A large body of evidence shows that cannabinoids, in addition to their well-known palliative effects on some cancer-associated symptoms, can reduce tumour growth in animal models of cancer. They do so by modulating key cell signalling pathways involved in the control of cancer cell proliferation and survival. In addition, cannabinoids inhibit angiogenesis and cell proliferation in different types of tumours in laboratory animals. By contrast, little is known about the biological role of the endocannabinoid system in cancer physio-pathology, and several studies suggest that it may be over-activated in cancer. In this review, we discuss our current understanding of cannabinoids as antitumour agents, focusing on recent advances in the molecular mechanisms of action, including resistance mechanisms and opportunities for combination therapy approaches.
Keywords
- Angiogenesis
- Apoptosis
- Autophagy
- Cancer
- Cannabinoid
- Cell proliferation
- Cell signalling
- Combinational therapy
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- 2-AG:
-
2-Arachidonoylglycerol
- ALK:
-
Anaplastic lymphoma kinase
- ATF-4:
-
Activating transcription factor 4
- CB1 :
-
Cannabinoid CB1 receptor
- CB2 :
-
Cannabinoid CB2 receptor
- CBD:
-
Cannabidiol
- CHOP:
-
C/EBP homologous protein
- EGFR:
-
Epidermal growth factor receptor
- ER:
-
Endoplasmic reticulum
- ERK:
-
Extracellular signal-regulated kinase
- MDK:
-
Midkine
- mTORC1:
-
Mammalian target of rapamycin complex 1
- mTORC2:
-
Mammalian target of rapamycin complex 2
- THC:
-
Δ9-tetrahydrocannabinol
- TRIB3:
-
Tribbles-homologue 3
- TRPV1:
-
Transient receptor potential cation channel subfamily V member 1
- VEGF:
-
Vascular endothelial growth factor
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Acknowledgements
Research in the groups of the authors is supported by grants from Spanish Ministry of Economy and Competitiveness (MINECO) (PI12/02248, FR2009-0052 and IT2009-0053 to GV; and PI11/00295 to CS), Comunidad de Madrid (S2011/BMD-2308 to MG), GW Pharmaceuticals (to GV, CS and MG); Fundación Mutua Madrileña (AP101042012 to GV) and Fundació Telemarató (20134031 to GV)
Potential Conflict of Interest
We declare that GW Pharmaceuticals funded part of the research of our laboratory. Likewise, part of the data obtained by the authors in relation with the antitumour action of cannabinoids is included in three patent applications presented by GW Pharmaceuticals.
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Velasco, G., Sánchez, C., Guzmán, M. (2015). Endocannabinoids and Cancer. In: Pertwee, R. (eds) Endocannabinoids. Handbook of Experimental Pharmacology, vol 231. Springer, Cham. https://doi.org/10.1007/978-3-319-20825-1_16
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