In Vitro Evaluation of Novel Furo[3,2-c]coumarins as Cholinesterases and Monoamine Oxidases Inhibitors
2025
Mariagrazia Rullo | Alice Benzi | Lara Bianchi | Massimo Maccagno | Guglielmo Marcantoni Taddei | Daniela Valeria Miniero | Giuseppe Felice Mangiatordi | Giovanni Lentini | Leonardo Pisani | Giovanni Petrillo | Cinzia Tavani
Coumarin represents a privileged structural motif that is quite common in nature-derived and synthetic bioactive molecules. Some of us have recently described the straightforward preparation of complex furo[3,2-c]coumarins through a sequential double coupling protocol. Aiming at finding novel chemical probes for the modulation of key anti-Alzheimer&rsquo:s targets, a small subset of furo[3,2-c]coumarin prototypes and their non-aromatic synthetic precursors were tested in vitro as inhibitors of ChEs (acetyl- and butyrylcholinesterase, AChE and BChE) and MAOs (monoamine oxidases A and B, MAO A and MAO B). All compounds were low-micromolar AChE inhibitors devoid of toxic effects against SH-SY5Y cells. Lineweaver-Burk plots and docking simulations suggested mixed-type kinetics for inhibitor 3d (IC50 = 4.1 &mu:M toward AChE). Its promising inhibitory profile encompasses additional, highly selective, activity against monoamine oxidase B, with a submicromolar IC50 value (561 nM).
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