The protocol of Western blotting was based on that of a previously published study (14 (link)). The same amounts of proteins were separated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and transferred to nitrocellulose membranes. The membranes were then blocked in 5% skim milk for at least 2 h and incubated with primary antibodies at 4 °C overnight and secondary antibodies at room temperature for 1 h. Antibodies against PSMD12 (11412-1-AP; Proteintech, China), FLAG (F1804; Sigma, USA), Nrf2 (16396-1-AP; Proteintech, China), NRBP2 (21549-1-AP; Proteintech, China), p-Akt (4060; Cell Signaling Technology, USA), Akt (2920; Cell Signaling Technology, USA), p-mTOR (5536; Cell Signaling Technology, USA), mTOR (2983; Cell Signaling Technology, USA), and β-actin (A5441; Sigma, USA) were used.