ZEB1 and hepatocellular carcinoma: Mounting evidence indicates the crucial role of several master stemness‐associated transcription factors in tumor stemness.[4, 7] Among the factors tested, the protein levels of ZEB1 strikingly increased in different DIO3OS‐depleted HCC cells (Figure4B; Figure S4A,B, Supporting Information) and significantly decreased in DIO3OS‐overexpressing HCC cells (Figure 4A), whereas ZEB1 mRNA levels remained unchanged (Figure 4A,B).