Moreover, these PSFs repress the EMT progression factor Zeb1 to prevent the EMT advancement to a complete mesenchymal state [17,38,55], and our data are indicative for weaker/lack of expression of Zeb1 in SKOV3-E cells and tumor tissues of mice IB-injected with SKOV3-E and SKOV3-E+M cells, compared to SKOV3-M cells and corresponding tumors. This evidence concerns the gene ZEB1 and neoplasm.