Effects of the flavonoids on ceramide and sphingomyeline contents in the normal and CCl
-treated hepatocytes. The cells (106/ml) were pre-incubated at 37°C in Eagle medium for 2 h followed by the 40 mM CCl4 addition and suspension was incubated for 2 h. In some cases the chamiloflan (500 μg/ml) or AP7Glu (30 μM) were added to the culture medium 2 h prior the CCl4 addition and the cells incubated for 4 h. Control cells were incubated in the presence of 30 mM ethanol for 4 h. Lipid contents in the cells were determined as described in the "Materials and Methods". Results are mean ± S.E. of six experiments performed in duplicate. * P < 0.05, CCl4-treated vs. control; ** P < 0.05, CCl4+flavonoid-treated vs. CCl4-treated.