Protein extraction and western blotting analysis were performed using previously standard procedures (17 (link)). The following antibodies were used for western blotting: anti-E-cadherin antibody(#20874-1-AP Proteintech, China), anti-N-cadherin antibody(#22018-1-AP Proteintech, China), anti-ZEB1 antibody(#66279-1-Ig Proteintech, China), anti-Vimentin antibody(10366-1-AP Proteintech, China), anti-SOX2 antibody(#11064-1-AP Proteintech, China), anti-GAPDH antibody(#10494-1-AP Proteintech, China), and anti-PD-L1 antibody(#66248-1-Ig Proteintech, China).
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