PROM1 and cancer: Irradiation also enriched CD133+ cancer stem-like Sk-Hep-1 HCC cells and pterostilbene treatment suppressed the enrichment of CD133+ SK-Hep-1 cells and its stemness (see Supplementary Figures 1 and 2 available online at http://dx.doi.org/10.1155/2013/258425).