ZEB1 and lung cancer: Compared to paracancerous tissues, circRAPGEF5 and ZEB1 were overexpressed in LAD tissues (Fig. 6A, C, D, F), and the expression level of miR-1236-3p in lung cancer was lower than that in paracancerous tissues, but there was no significant difference due to the small number of cases (Fig. 6B, E).