Discovery of long-chain salicylketoxime derivatives as monoacylglycerol lipase (MAGL) inhibitors.

Bononi, Giulia; Granchi, Carlotta; Lapillo, Margherita; Giannotti, Massimiliano; Nieri, Daniela; Fortunato, Serena; Boustani, Maguie El; Caligiuri, Isabella; Poli, Giulio; Carlson, Kathryn E; Kim, Sung Hoon; Macchia, Marco; Martinelli, Adriano; Rizzolio, Flavio; Chicca, Andrea; Katzenellenbogen, John A; Minutolo, Filippo; Tuccinardi, Tiziano (2018). Discovery of long-chain salicylketoxime derivatives as monoacylglycerol lipase (MAGL) inhibitors. European journal of medicinal chemistry, 157, pp. 817-836. Elsevier Masson SAS 10.1016/j.ejmech.2018.08.038

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Monoacylglycerol lipase (MAGL) is the enzyme hydrolyzing the endocannabinoid 2-arachidonoylglycerol (2-AG) to free arachidonic acid and glycerol. Therefore, MAGL is implicated in many physiological processes involving the regulation of the endocannabinoid system and eicosanoid network. MAGL inhibition represents a potential therapeutic target for many diseases, including cancer. Nowadays, most MAGL inhibitors inhibit this enzyme by an irreversible mechanism of action, potentially leading to unwanted side effects from chronic treatment. Herein, we report the discovery of long-chain salicylketoxime derivatives as potent and reversible MAGL inhibitors. The compounds herein described are characterized by a good target selectivity for MAGL and by antiproliferative activities against a series of cancer cell lines. Finally, modeling studies suggest a reasonable hypothetical binding mode for this class of compounds.

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