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. 2021 May 21;11:668424. doi: 10.3389/fonc.2021.668424

Figure 5.

Figure 5

SS inhibits the AKT/mTOR/4E-BP3 axis in a ROS-dependent manner. (A) Thyroid cancer cells were treated with vehicle control or different concentrations of SS for 6 h, and the protein levels of p-AKT, total AKT, p-mTOR, total mTOR, p-ERK, and total ERK were detected by western blotting. The expression of β-actin was used as a reference. (B) NAC treatment reversed the inhibitory effect of SS on the AKT/mTOR pathway. (C) 4E-BP3 mRNA expression in SS treatment and control groups. (D) The proliferation of WT and 4E-BP3-knockdown cells under normal conditions. (E) Morphological changes, cell viability, and (G) percentage of G0/G1 phase cells in WT and 4E-BP3-knockdown groups after incubation with SS for 24 h. (F) Colony formation capacity of WT and 4E-BP3-knockdown cells after SS treatment. SS, sodium selenite; NAC, N-acetylcysteine. **P < 0.01; ***P < 0.001.