OBJECTIVE:To study the effects of lycopene on the cholesterol metabolism and its related protein Srebp-1,Caveolin-1 expression in macrophage-derived cholesterol-loaded cells.METHODS:Macrophage-derived cholesterol-load cell model was established.The contents of total cholesterol(TC),free cholesterol(FC)and cholesterd esterase(CE)were determined by HPLC after cholesterol-load cells were treated with different concentrations of lycopene(12.5,25 and 50 μmol/L)for 24 h or treated by 25 μmol/L lycopene for different time(12,24,48,72 h);...