Update on the Role of Cannabinoid Receptors after Ischemic Stroke

“The endocannabinoid system is considered as a major modulator of the cerebral blood flow, neuroinflammation, and neuronal survival… Evidence from animal models and in vitro studies suggests a global protective role for cannabinoid receptors agonists in ischemic stroke…Given its potent anti-inflammatory activities on circulating leukocytes, the CB2 activation has been proven to produce protective effects against acute poststroke inflammation. In this paper, we will update evidence on different cannabinoid-triggered avenues to reduce inflammation and neuronal injury in acute ischemic stroke…

Synthetic cannabinoids have been also investigated in animal models showing an improvement of the ischemic injury in the liver, heart, and brain. Furthermore, phytocannabinoids have been also isolated from the Cannabis sativa. Since this plant contains about 80 different cannabinoids, a strong work is still needed to test all these active compounds. This delay in cannabinoid research might be also due to the very low dose of certain cannabinoids in the plant. Thus, since Δ9-tetrahydrocannabidiol (THC) and cannabidiol (CBD) represent up to 40% of the total cannabinoid mass, these compounds have been considered as the most active mediators…

The encouraging therapeutic results of this study are in partial contrast with previous case reports, suggesting a potential relationship between stroke and chronic cannabis abuse in young human beings…

We believe that the “cannabinoid” approach represents an interesting therapeutic strategy still requiring further validations to improve neurologic and inflammatory outcomes in ischemic stroke.”

Full text: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3337695/

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