MTOR and gastric cancer: PEC treatment also induced an acute decrease in the phosphorylation of the mTOR targets p70 ribosomal protein S6 kinase (p-p70S6K), 4E-BP1 and p-eIF4E, revealing a potent inhibitory effect of PEC on PI3K/AKT/mTOR signaling leading to cell cycle arrest, autophagy and apoptosis in human gastric cancer cells treated with PEC.