New Tacrine–4-Oxo-4<i>H</i>-chromene Hybrids as Multifunctional Agents for the Treatment of Alzheimer’s Disease, with Cholinergic, Antioxidant, and β-Amyloid-Reducing Properties
作者:María Isabel Fernández-Bachiller、Concepción Pérez、Leticia Monjas、Jörg Rademann、María Isabel Rodríguez-Franco
DOI:10.1021/jm201460y
日期:2012.2.9
By using fragments endowed with interesting and complementary properties for the treatment of Alzheimer's disease (AD), a new family of tacrine-4-oxo-4H-chromene hybrids has been designed, synthesized, and evaluated biologically. The tacrine fragment was selected for its inhibition of cholinesterases, and the flavonoid scaffold derived from 4-oxo-4H-chromene was chosen for its radical capture and beta-secretase 1 (BACE-1) inhibitory activities. At nano- and picomolar concentrations, the new tacrine-4-oxo-4H-chromene hybrids inhibit human acetyl- and butyrylcholinesterase (h-AChE and h-BuChE), being more potent than the parent inhibitor, tacrine. They are also potent inhibitors of human BACE-1, better than the parent flavonoid, apigenin. They show interesting antioxidant properties and could be able to penetrate into the CNS according to the in vitro PAMPA-BBB assay. Among the hybrids investigated, 6-hydroxy-4-oxo- N-10-[(1,2,3,4-tetrahydroacridin-9-yl)amino]decyl}-4 H-chromene-2-carboxamide (19) shows potent combined inhibition of human BACE-1 and ChEs, as well as good antioxidant and CNS-permeable properties.