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Neuronal and molecular effects of cannabidiol on the mesolimbic dopamine system: Implications for novel schizophrenia treatments.

Justine Renard, Christopher Norris, Walter J Rushlow, Steven R Laviolette

Neuroscience & Biobehavioral Reviews April 2017 DOI: 10.1016/j.neubiorev.2017.02.006 (opens in new tab)

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AI-extracted from the abstract
Characteristics Review Peer reviewed
Intervention Cannabidiol (CBD)
Topics CBD PTSD
Keywords Dopamine Pharmacotherapy Schizophrenia
Key findings The authors argue that CBD modulates mesolimbic dopamine activity and interacts with the serotonin 5-HT1A receptor system, and they cite clinical evidence suggesting CBD may normalize affective and cognitive deficits in schizophrenia. They propose CBD as a promising schizophrenia treatment acting through mesolimbic substrates, while noting that differential molecular and neuronal effects of CBD versus THC remain poorly understood.

Abstract

Growing clinical and pre-clinical evidence points to a critical role for cannabidiol (CBD), the largest phytochemical component of cannabis, as a potential pharmacotherapy for various neuropsychiatric disorders. In contrast to delta-9-tetrahydrocannabinol (THC), which is associated with acute and neurodevelopmental pro-psychotic side-effects, CBD possesses no known psychoactive or dependence-producing properties. However, evidence has demonstrated that CBD strongly modulates the mesolimbic dopamine (DA) system and may possess promising anti-psychotic properties. Despite the psychotropic differences between CBD and THC, little is known regarding their molecular and neuronal effects on the mesolimbic DA system, nor how these differential effects may relate to their potential pro vs. anti-psychotic properties. This review summarizes clinical and pre-clinical evidence demonstrating CBD's modulatory effects on DA activity states within the mesolimbic pathway, functional interactions with the serotonin 5-HT1A receptor system, and their downstream molecular signaling effects. Together with clinical evidence showing that CBD may normalize affective and cognitive deficits associated with schizophrenia, CBD may represent a promising treatment for schizophrenia, acting through novel molecular and neuronal mesolimbic substrates.

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