Background: Cancer stem cell (CSC) hypothesis has not been well demonstrated by the lack of the most convincing evidence concerning a single cell capable of giving rise to a tumor. The scarcity in quantity and improper approaches for isolation and purification of CSCs have become the major obstacles for great development in CSCs. Here we adopted suspension culture combined with anticancer regimens as a strategy for screening breast cancer stem cells (BrCSCs). BrCSCs could survive and be highly enriched in non-adherent suspension culture while chemotherapeutic agents could destroy most rapidly dividing cancer cells and spare relatively quiescent BrCSCs.
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Deguelin attenuates radiation-induced prosurvival Akt signaling and enhances the radiosensitivity of MDA-MB-231 cells, and the mechanisms for this action may include inhibiting phospho-Akt and survivin expression, increasing caspase-dependent apoptosis, and prolonging cell cycle arrest in the G2-M phase.
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