Development of an HPLC/UV assay for the evaluation of inhibitors of human recombinant monoacylglycerol lipase

Journal of Pharmaceutical and Biomedical Analysis
S Del CarloG Saccomanni

Abstract

Monoacylglycerol lipase (MAGL) is a membrane-associated cytosolic serine hydrolase which catalyses the hydrolysis of the endocannabinoid 2-arachidonoylglycerol into arachidonic acid and glycerol. MAGL represents the link between the endocannabinoid and the eicosanoid system indeed its inhibition enhances endocannabinoid signalling and lowers eicosanoid production. Here we present a radioactive-free, sensitive and solid HPLC-UV based method to evaluate MAGL activity by using 4-nitrophenylacetate (4-NPA) as substrate. The enzymatic activity is measured by quantifying the 4-nitrophenol (PNP) (λ = 315 nm) formation on a C18 stationary phase. The method was validated by calculating IC50 values of the reference inhibitors JZL184, CAY10499 and JW642 and confirming the irreversible and non-competitive mechanism of inhibition for JZL184. Furthermore in order to resemble the catalytic conditions of MAGL at cell membrane level, the surfactant Triton X-100 was added, as a micelle forming agent and 4-nitrophenyldodecanoate (4-NPDo) was used as lipophilic substrate for MAGL. The data obtained confirmed that the HPLC method is an alternative, radioactive-free approach for the screening and characterization of new MAGL inhibitors. Finally this...Continue Reading

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Citations

Aug 12, 2016·Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences·Arslan Arinc KayacelebiDimitrios Tsikas
May 7, 2021·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Yuko KawaiHideaki Hisamoto

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