Fig. 4. Oleanolic acid induced autophagy via PI3K/Akt/mTOR pathway.

HepG2 cells were cultured with indicated concentrations of OA for 24 h and protein expression were examined in HepG2 cells. The results shown are representative of three different experiments. The band intensities from repeated experiments were calculated and static. ^*p<0.05, ^**p<0.01.