Cannabidiol prevents nausea in rats
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IMAGE: A non-psychoactive compound derived from marijuana could potentially be developed into new anti-nausea treatments for cancer patients receiving chemotherapy, suggests research in rats published in eNeuro. The study represents an… view more 

Credit: Limebeer et al., eNeuro (2018)

A non-psychoactive compound derived from marijuana could potentially be developed into new anti-nausea treatments for cancer patients receiving chemotherapy, suggests research in rats published in eNeuro. The study represents an advance in understanding the neurobiology of this distressing symptom that accompanies vomiting but is not effectively treated by current drugs.

Linda Parker and colleagues observed a surge in levels of the neurotransmitter serotonin in the rat interoceptive insular cortex (IIC) — a brain region responsible for nausea in humans — following injection with the nauseating chemical compound lithium chloride. This increase in serotonin and subsequent gaping behavior (a behavior displayed by rodents to flavors paired with a nauseating treatments) was prevented by treatment with cannabidiol — a form of cannabis that does not contain the component found in recreational marijuana responsible for the drug’s psychotropic effects. Treatment with a drug that elevates the endogenous cannabinoid, 2-AG, also prevented the elevation of serotonin in the IIC by activating the cannabinoid type

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