Expressions of cancer stem cell-related genes ABCG2, NANOG, ALDH1, OCT4, and SOX2 were significantly down-regulated in si-RSU1P2-1 and si-RSU1P2-2 groups compared to si-NC group (p < 0.05; Supplementary Figure S1D and S1E). This evidence concerns the gene ABCG2 and cancer.