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Different pharmacological profile of two closely related endocannabinoid ester analogs. | LitMetric

AI Article Synopsis

Article Abstract

The pharmacological and neuroprotective properties of two ester analogs of the endocannabinoids, arachidonoylethyleneglycol (AA-EG) and alpha,alpha,-dimethyl arachidonoylethyleneglycol (DMA-EG), were investigated. We examined the interaction of both compounds with cannabinoid receptors (CB1 and CB2) and their efficacy in functional assays. In competition binding assays, AA-EG and DMA-EG had low potency to displace the CB1/CB2 agonist [3H]CP-55,940 in membrane preparations expressing rodent or human receptors. Binding data correlate with low efficacy of both compounds as regards to inhibition of adenylyl cyclase activity. It was also shown that DMA-EG resists hydrolysis by rat brain membranes while AA-EG undergo complete splitting under these conditions. In the cannabinoid tetrad, AA-EG induced hypomotility, analgesia, catalepsy and decreased rectal temperature indicating cannabimimetic activity. By contrast, DMA-EG was completely inactive in the same models. DMA-EG and AA-EG potently protected rat cortical neurons in culture against oxygen deprivation at nanomolar concentrations. In glutamate-induced damage, the compounds were less active protecting neurons at micromolar concentrations. The data obtained indicate that the ester endocannabinoid template can be used for the development of new compounds with potent biological activity lacking some of the undesirable behavioral side effects.

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http://dx.doi.org/10.1016/j.lfs.2005.02.011DOI Listing

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