+ cells, 7 subline, ABCB1, ABCB1 protein, ATP, ATP-binding cassette transporters, CCNE1, CD133, CD24, CD24 cells, CD44, CD44+, Cancer, Cancer stem cells, MCF, MCF-, MCF-7 cells, MCF-7/ADR, MCF-7/ADR cells, MCF-7/MDR, MMP9, SNAI1, TGFB1, Xenograft tumors, breast cancer, breast cancer cells, cancer, cancer stem cell, cancer stem cells, cancer stem-like cells, doxorubicin, doxorubicin-selected MCF-7/ADR cells, mRNA, mRNAs, mammospheres, mice, multidrug resistance genes, multidrug resistance-linked genes, parental MCF-7 cells, putative, putative cancer stem cells, side, tumors