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Research Library

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An entourage effect: inactive endogenous fatty acid glycerol esters enhance 2-arachidonoyl-glycerol cannabinoid activity

  • Journal : European Journal of Pharmacology
  • Publication Year : 1998
  • Authors : Shimon Ben-Shabat, Ester Fride, Tzviel Sheskin, Tsippy Tamiri, Man-Hee Rhee, Zvi Vogel, Tiziana Bisogno, Luciano De Petrocellis, Vincenzo Di Marzo, & Raphael Mechoulam

2-Arachidonoyl-glycerol 2-Ara-Gl has been isolated from various tissues and identified as an endogenous ligand for both cannabinoid receptors, CB and CB . Here we report that in spleen, as in brain and gut, 2-Ara-Gl is accompanied by several 1 2 2-acyl-glycerol esters, two major ones being 2-linoleoyl-glycerol 2-Lino-Gl and 2-palmitoyl-glycerol 2-Palm-Gl . These two esters do not bind to the cannabinoid receptors, nor do they inhibit adenylyl cyclase via either CB or CB ; however, they significantly potentiate 1 2 the apparent binding of 2-Ara-Gl and its apparent capacity to inhibit adenylyl cyclase. Together these esters also significantly potentiate 2-Ara-Gl inhibition of motor behavior, immobility on a ring, analgesia on a hot plate and hypothermia caused by 2-Ara-Gl in mice. 2-Lino-Gl, but not 2-Palm-Gl, significantly inhibits the inactivation of 2-Ara-Gl by neuronal and basophilic cells. These data indicate that the biological activity of 2-Ara-Gl can be increased by related, endogenous 2-acyl-glycerols, which alone show no significant activity in any of the tests employed. This effect ‘entourage effect’ may represent a novel route for molecular regulation of endogenous cannabinoid activity.

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Conditions:

  • Potential of whole plant vs. single compound model

Research Information:

Research Keywords:

  • 2-Arachidonoylglycerol (2-AG), Anandamide (AEA), Cannabinoid receptor/s, Endocannabinoid/s

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