tetrahydrocannabinol induces brain mitochondrial respiratory chain dysfunction and increases oxidative stress: a potential mechanism involved in cannabis-related stroke

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ID: 197081
2015
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Abstract
Cannabis has potential therapeutic use but tetrahydrocannabinol (THC), its main psychoactive component, appears as a risk factor for ischemic stroke in young adults. We therefore evaluate the effects of THC on brain mitochondrial function and oxidative stress, key factors involved in stroke. Maximal oxidative capacities Vmax (complexes I, III, and IV activities), Vsucc (complexes II, III, and IV activities), Vtmpd (complex IV activity), together with mitochondrial coupling (Vmax/V0), were determined in control conditions and after exposure to THC in isolated mitochondria extracted from rat brain, using differential centrifugations. Oxidative stress was also assessed through hydrogen peroxide (H2O2) production, measured with Amplex Red. THC significantly decreased Vmax (−71%; P<0.0001), Vsucc (−65%; P<0.0001), and Vtmpd (−3.5%; P<0.001). Mitochondrial coupling (Vmax/V0) was also significantly decreased after THC exposure (1.8±0.2 versus 6.3±0.7; P<0.001). Furthermore, THC significantly enhanced H2O2 production by cerebral mitochondria (+171%; P<0.05) and mitochondrial free radical leak was increased from 0.01±0.01 to 0.10±0.01% (P<0.001). Thus, THC increases oxidative stress and induces cerebral mitochondrial dysfunction. This mechanism may be involved in young cannabis users who develop ischemic stroke since THC might increase patient’s vulnerability to stroke.
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wolff2015biomedtetrahydrocannabinol Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Valérie Wolff;Anna-Isabel Schlagowski;Olivier Rouyer;Anne-Laure Charles;François Singh;Cyril Auger;Valérie Schini-Kerth;Christian Marescaux;Jean-Sébastien Raul;Joffrey Zoll;Bernard Geny
Journal spectrochimica acta - part a: molecular and biomolecular spectroscopy
Year 2015
DOI
10.1155/2015/323706
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