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  • alpha-MSH/metabolism, Animals, beta-Endorphin/metabolism, Cannabinoid, Cannabinoids/pharmacology, CB1/agonists, CB1/metabolism, Eating/drug effects, Eating/physiology, Energy Metabolism/drug effects, Hypothalamus/cytology, Hypothalamus/drug effects, Hypothalamus/physiology, Inbred C57BL, Ion Channels/metabolism, Male, Mice, Mitochondria/drug effects, Mitochondria/metabolism, Mitochondrial Proteins/metabolism, Naloxone/pharmacology, Neurons/drug effects, Neurons/metabolism, Pro-Opiomelanocortin/metabolism, Receptor, Satiety Response/drug effects, Satiety Response/physiology, Uncoupling Protein 2
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Hypothalamic POMC neurons promote cannabinoid-induced feeding

Hypothalamic pro-opiomelanocortin (POMC) neurons promote satiety. Cannabinoid receptor 1 (CB1R) is critical for the central regulation of food intake. Here we test whether CB1R-controlled feeding in sated mice is paralleled by decreased activity of POMC neurons. We show that chemical promotion of CB1R activity increases feeding, and notably, CB1R activation also promotes neuronal activity of POMC cells. This paradoxical increase in POMC activity was crucial for CB1R-induced feeding, because designer-receptors-exclusively-activated-by-designer-drugs (DREADD)-mediated inhibition of POMC neurons diminishes, whereas DREADD-mediated activation of POMC neurons enhances CB1R-driven feeding. The Pomc gene encodes both the anorexigenic peptide α-melanocyte-stimulating hormone, and the opioid peptide β-endorphin. CB1R activation selectively increases...
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Therapeutic Action of Cannabinoids in a Murine Model of Multiple Sclerosis

Theiler’s virus infection of the CNS induces an immune-mediated demyelinating disease in susceptible mouse strains and serves as a relevant infection model for human multiple sclerosis (MS). Cannabinoids may act as immunosuppressive compounds that have shown therapeutic potential in chronic inflammatory disorders. Using the Theiler’s murine encephalomyelitis virus model, we report here that treatment with the synthetic cannabinoids WIN 55,212–2, ACEA, and JWH-015 during established disease significantly improved the neurological deficits in a long-lasting way. At a histological level, cannabinoids reduced microglial activation, abrogated major histocompatibility complex class II antigen expression, and decreased the number of CD4infiltrating T cells in the spinal cord. Both...
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