Objective To observe the effect that the Tangeretin on the PC-12 cell beta Amyloid (Aβ) protein levels and discuss the possible mechanism. Methods Using different concentrations (0.1,1,10,100μmol/L) of the Tangeretin to treat PC-12 cells at different time (Oh, 6h, 12h, 24 h, 48 h), the level of Aβ40 and Aβ42inthe cell culture were detected by the method of ELISA, the levels of ATP binding cassette transporter A1 (ABCA1) protein in the PC-12 cells were detected by western blot,the levels of ABCA1 mRNA in the PC-12 ceils were detected...