Figure 4

PERK silencing decreased p-AKT in glioma cells under low glucose metabolism stress.
U87 and U251 cells were transfected with NC or PERK shRNA and then were treated by 2-DG, BRPA or grown in LGM for 48 h. Westernblot analyses were performed to detect p-AKT (Ser473), AKT, PERK p-PERK, p-EIF2α and EIF2α protein expression. Statistical analysis of p-AKT/AKT was derived from 3 independent experiments which were run under same conditions. *, P < 0.05, **, P < 0.01.