Tanshinone IIA Attenuates the Stemness of Breast Cancer Cells via Targeting the miR-125b/STARD13 Axis

In vitro mammary spheroid formation, flow cytometry assay on CD24−/CD44⁺ sub-population, ALDH activity detection, cell viability assay and western blot analysis, and in vivo tumor-initiating analysis were performed to examine the effects of Tanshinone IIA on the stemness of breast cancer cells.