Myricetin ameliorates scopolamine-induced memory impairment in mice via inhibiting acetylcholinesterase and down-regulating brain iron

The aim of our study was to investigate to investigate the effect of myricetin on Alzheimer's disease (AD) and its underlying mechanisms. In our study, Myricetin effectively attenuated Fe2+-induced cell death in SH-SY5Y cells in vitro. In a mouse model of AD, myricetin treatment significantly reversed scopolamine-induced cognitive deficits deriving from a novel action of inhibiting acetylcholinesterase (AChE) and down-regulating brain iron. Furthermore, Myricetin treatment reduced oxidative damage and increased antioxidant enzymes activity in mice. Interestingly, the effect of myricetin was largely abolished by high iron diet. Therefore we suggested that treatment with myricetin attenuated cognitive deficits in mice via inhibiting AChE and brain iron regulation. In addition, myricetin reduce iron contents may via inhibiting transferrin receptor 1 (TrR1) expression. In conclusion, accumulated data demonstrates that myricetin is a potential multifunctional drug for AD.