Interestingly, protein expression analysis showed that CD133, a well-known stem cell surface marker, was significantly reduced by OTX015 exposure compared to mocked control cells in both SKOV3 cells (Figure 3d, right panel) and UWB1.289 samples (Figure S2b, right panel), so speculating the anticancer effects of BETi on the cancer stem cell (CSC) population. This evidence concerns the gene PROM1 and cancer.