The Immune Endocannabinoid System of the Tumor Microenvironment

Leukocytes are part of the tumor microenvironment (TME) and are critical determinants of tumor progression. Because of the immunoregulatory properties of cannabinoids, the endocannabinoid system (ECS) may have an important role in shaping the TME. Members of the ECS, an entity that consists of canna...

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Main Authors: Melanie Kienzl, Julia Kargl, Rudolf Schicho
Format: Article
Language:English
Published: MDPI AG 2020-11-01
Series:International Journal of Molecular Sciences
Subjects:
Online Access:https://www.mdpi.com/1422-0067/21/23/8929
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author Melanie Kienzl
Julia Kargl
Rudolf Schicho
author_facet Melanie Kienzl
Julia Kargl
Rudolf Schicho
author_sort Melanie Kienzl
collection DOAJ
description Leukocytes are part of the tumor microenvironment (TME) and are critical determinants of tumor progression. Because of the immunoregulatory properties of cannabinoids, the endocannabinoid system (ECS) may have an important role in shaping the TME. Members of the ECS, an entity that consists of cannabinoid receptors, endocannabinoids and their synthesizing/degrading enzymes, have been associated with both tumor growth and rejection. Immune cells express cannabinoid receptors and produce endocannabinoids, thereby forming an “immune endocannabinoid system”. Although in vitro effects of exogenous cannabinoids on immune cells are well described, the role of the ECS in the TME, and hence in tumor development and immunotherapy, is still elusive. This review/opinion discusses the possibility that the “immune endocannabinoid system” can fundamentally influence tumor progression. The widespread influence of cannabinoids on immune cell functions makes the members of the ECS an interesting target that could support immunotherapy.
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spelling doaj.art-56d351e009164230ba927a7603524dd12023-11-20T22:13:47ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672020-11-012123892910.3390/ijms21238929The Immune Endocannabinoid System of the Tumor MicroenvironmentMelanie Kienzl0Julia Kargl1Rudolf Schicho2Division of Pharmacology, Otto Loewi Research Center, Medical University of Graz, Universitätsplatz 4, 8010 Graz, AustriaDivision of Pharmacology, Otto Loewi Research Center, Medical University of Graz, Universitätsplatz 4, 8010 Graz, AustriaDivision of Pharmacology, Otto Loewi Research Center, Medical University of Graz, Universitätsplatz 4, 8010 Graz, AustriaLeukocytes are part of the tumor microenvironment (TME) and are critical determinants of tumor progression. Because of the immunoregulatory properties of cannabinoids, the endocannabinoid system (ECS) may have an important role in shaping the TME. Members of the ECS, an entity that consists of cannabinoid receptors, endocannabinoids and their synthesizing/degrading enzymes, have been associated with both tumor growth and rejection. Immune cells express cannabinoid receptors and produce endocannabinoids, thereby forming an “immune endocannabinoid system”. Although in vitro effects of exogenous cannabinoids on immune cells are well described, the role of the ECS in the TME, and hence in tumor development and immunotherapy, is still elusive. This review/opinion discusses the possibility that the “immune endocannabinoid system” can fundamentally influence tumor progression. The widespread influence of cannabinoids on immune cell functions makes the members of the ECS an interesting target that could support immunotherapy.https://www.mdpi.com/1422-0067/21/23/8929tumor microenvironmentendocannabinoid systemcannabinoid receptorsimmune cells
spellingShingle Melanie Kienzl
Julia Kargl
Rudolf Schicho
The Immune Endocannabinoid System of the Tumor Microenvironment
International Journal of Molecular Sciences
tumor microenvironment
endocannabinoid system
cannabinoid receptors
immune cells
title The Immune Endocannabinoid System of the Tumor Microenvironment
title_full The Immune Endocannabinoid System of the Tumor Microenvironment
title_fullStr The Immune Endocannabinoid System of the Tumor Microenvironment
title_full_unstemmed The Immune Endocannabinoid System of the Tumor Microenvironment
title_short The Immune Endocannabinoid System of the Tumor Microenvironment
title_sort immune endocannabinoid system of the tumor microenvironment
topic tumor microenvironment
endocannabinoid system
cannabinoid receptors
immune cells
url https://www.mdpi.com/1422-0067/21/23/8929
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