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Effects of 20(S)-PPD on the Akt pathway in HepG2 cells. (A) HepG2 cells (4×105 per ml) were treated using 0, 40, 50 and 60 µM of 20(S)-PPD for 24 h and the expression of Akt and p-Akt were determined using western blotting. (B) Quantification of western blot analysis for p-Akt. All values are expressed as the mean ± standard deviation. *P<0.05 vs. the control group. C, control group; 20(S)-PPD, 20(S)-Protopanaxadiol; Akt, protein kinase B; p-, phosphorylated.
