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A major glucuronidated metabolite of JWH-018 is a neutral antagonist at CB1 receptors.


ABSTRACT: Recently, hydroxylated metabolites of JWH-018, a synthetic cannabinoid found in many K2/Spice preparations, have been shown to retain affinity and activity for cannabinoid type 1 receptors (CB1Rs). The activity of glucuronidated metabolites of JWH-018 is not known; hence, this study investigated the affinity and activity of a major metabolite, JWH-018-N-(5-hydroxypentyl) ?-D-glucuronide (018-gluc), for CB1Rs. The 018-gluc binds CB1Rs (K(i) = 922 nM), has no effect on G-protein activity, but antagonizes JWH-018 activity at CB1Rs. The data suggests that hydroxylation by cytochrome P450s and subsequent glucuronidation by UDP-glucuronosyltransferases produces a metabolite, 018-gluc, which possesses antagonistic activity at CB1Rs.

SUBMITTER: Seely KA 

PROVIDER: S-EPMC3921679 | biostudies-literature | 2012 Apr

REPOSITORIES: biostudies-literature

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A major glucuronidated metabolite of JWH-018 is a neutral antagonist at CB1 receptors.

Seely Kathryn A KA   Brents Lisa K LK   Radominska-Pandya Anna A   Endres Gregory W GW   Keyes Gregory S GS   Moran Jeffery H JH   Prather Paul L PL  

Chemical research in toxicology 20120315 4


Recently, hydroxylated metabolites of JWH-018, a synthetic cannabinoid found in many K2/Spice preparations, have been shown to retain affinity and activity for cannabinoid type 1 receptors (CB1Rs). The activity of glucuronidated metabolites of JWH-018 is not known; hence, this study investigated the affinity and activity of a major metabolite, JWH-018-N-(5-hydroxypentyl) β-D-glucuronide (018-gluc), for CB1Rs. The 018-gluc binds CB1Rs (K(i) = 922 nM), has no effect on G-protein activity, but anta  ...[more]

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