The effect of GC-EV-delivered miR-675-3p on immune escape of GC cells was determined by subjecting GC cells to miR-675-3p mimic contained in EVs, after which miR-675-3p, CXXC4, ERK, phosphorylated ERK content, and PD-L1 expression were detected (Figures 4E and 4F, p < 0.05). Here, CD274 is linked to gastric cancer.