ZEB2 and cancer: Moreover, an inverse correlation between miR-30a-5p and ZEB2 expression levels was discovered in ccRCC tissues obtained from both the First Affiliated Hospital and Cancer Center of Sun Yat-sen University (r=−0.33, P<0.001) (Figure 2d) and the TCGA database (r=−0.18, P<0.0001) (Figure 2e).