Abstract
Cerebral metabolic abnormalities are common in neurodegenerative diseases. Previous studies have shown that mitochondrial damage alters ATP production and increases reactive oxygen species (ROS) release which may contribute to neurodegeneration. In the present study, we investigated the neuroprotective effects of cannabidiol (CBD), a non-psychoactive component derived from marijuana (Cannabis sativa L.), on astrocytic bioenergetic balance in a primary cell culture model of lipopolysaccharide (LPS)-induced neurotoxicity. Astrocytic metabolic profiling using an extracellular flux analyzer demonstrated that CBD decreases mitochondrial proton leak, increased spare respiratory capacity and coupling efficiency in LPS-stimulated astrocytes. Simultaneously, CBD increased astrocytic glycolytic capacity and glycolysis reserve in a cannabinoid receptor type 1 (CB1)-dependent manner. CBD-restored metabolic changes were correlated with a significant decrease in the pro-inflammatory cytokines tumor necrosis factor α (TNFα) and interleukin-6 (IL-6) concentration and reduction of ROS production in LPS-stimulated astrocytes. These results suggest that CBD may inhibit LPS-induced metabolic impairments and inflammation by enhancing astrocytic metabolic glycolysis versus oxidative phosphorylation through its action on CB1 receptors. The present findings suggest CBD as a potential anti-inflammatory treatment in metabolic pathologies and highlight a possible role for the cannabinoidergic system in the modulation of mitochondrial oxidative stress.
Graphical Abstract
CBD enhances mitochondrial bioenergetic profile, attenuates proinflammatory cytokines release, and ROS overproduction of astrocytes stimulated by LPS. These effects are not mediated directly by CB1 receptors, while these receptors seem to have a key role in the anti-inflammatory response of the endocannabinoid system on astrocytes, as their specific inhibition by SR141716A led to increased pro-inflammatory cytokines release and ROS production. The graphical abstract is created with BioRender.com.
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Data Availability
All data sets are available from the corresponding author on reasonable request.
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Acknowledgements
The authors would like to thank the Physiology and Physiopathology Team, Faculty of Sciences, Rabat Morocco. Also, we would like to acknowledge the R&D biotechnological platform of Mascir Moroccan foundation, and Behavioural Neuroscience Core Facility (BNCF), University of Dundee, UK for the technical assistance.
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All authors contributed to the study's conception and design. Material preparation, data collection, and analysis were performed by Hind IBORK, Oualid ABBOUSSI, Sara EL IDRISSI, and Robert MILLER. The first draft of the manuscript was written by Hind IBORK. Oualid ABBOUSSI, Annabelle Manalo Morgan, and Simo Siyanda ZULU co-designed the study and commented on previous versions of the manuscript. Khalid TAGHZOUTI and Lhoussain HAJJI supervised all the experiments. All authors read and approved the final version of the manuscript.
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Animals were raised in the central animal care facilities of the Faculty of Sciences, Mohammed V University, Rabat, Morocco. All animal procedures were strictly following the guidelines of the European Council Directive (EU2010/63). Ethical clearance no. 86/609/EC20.
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Ibork, H., Idrissi, S.E., Zulu, S.S. et al. Effect of Cannabidiol in LPS-Induced Toxicity in Astrocytes: Possible Role for Cannabinoid Type-1 Receptors. Neurotox Res 41, 615–626 (2023). https://doi.org/10.1007/s12640-023-00671-2
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DOI: https://doi.org/10.1007/s12640-023-00671-2