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Chembiochem : a European journal of chemical biology

CAY10499, a novel monoglyceride lipase inhibitor evidenced by an expeditious MGL assay.


PMID 18855964

Abstract

Monoglyceride lipase (MGL) plays a major role in the metabolism of the lipid transmitter 2-arachidonoylglycerol (2-AG). This endocannabinoid is known to mediate a large number of physiological processes, and its regulation is thought to be of great therapeutic potential. However, the number of available monoglyceride lipase inhibitors is limited, mostly due to the lack of rapid and accurate pharmacological assays for the enzyme. We have developed a 96-well-format assay for MGL using a nonradiolabeled substrate, 4-nitrophenylacetate. The IC(50) values that were obtained for known inhibitors of MGL using 4-nitrophenylacetate were similar to those reported by using the radiolabeled form of an endogenous substrate, 2-oleoylglycerol. In a first small-scale screening, we identified CAY10499 as a novel monoglyceride lipase inhibitor. Thus, we report here the characterization of this submicromolar inhibitor, which acts on MGL through an unprecedented mechanism for inhibitors of this enzyme.

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