We describe the development of quinolylnitrones(Qns)as multifunctional ligan.s inhibiting cholinesterases(Ches:acetylcholinesterase an. butyrylcholinesterase—h BChE)an. monoamine oxidases(hMAO-A/B)for the therapy of ...
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We describe the development of quinolylnitrones(Qns)as multifunctional ligan.s inhibiting cholinesterases(Ches:acetylcholinesterase an. butyrylcholinesterase—h BChE)an. monoamine oxidases(hMAO-A/B)for the therapy of neurodegenerative *** identified Qn 19,a simple,low molecular weight nitrone,that is readily synthesized from commercially available *** 19 has no typical pharmacophoric element to suggest ChE or MAO inhibition,yet unexpectedly showed potent inhibition of h BChE(IC50=1.06±0.31 nmol/L)an. h MAO-B(IC_(50)=4.46±0.18μmol/L).The crystal structures of 19 with hBChE an. hMAO-B provided the structural basis for potent binding,which was further studied by enzyme *** 19 acted as a free radical scavenger an. biometal chelator,crossed the blood—brain barrier,was not cytotoxic,an. showed neuroprotective properties in a 6-hydroxydopamine cell model of Parkinson's *** addition,in vivo studies showed the an.i-amnesic effect of 19 in the scopolamine-induced mouse model of AD without adverse effects on motoric function an. ***,chronic treatment of double tran.genic APPswe-PS1δE9 mice with 19 reduced amyloid plaque load in the hippocampus an. cortex of female mice,underscoring the disease-modifying effect of Qn 19.
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