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Objective:Previous studies have shown that the transforming growth factor β1 pathway plays an important role in breast cancer metastasis to the liver. However, the mechanism of this metastasis has not been fully clarified. Cancer stem cells are essential for the initiation and propagation of tumor metastasis. The objective of our current study was to define the role of cancer stem cells in transforming growth factor β1-mediated breast cancer hepatic metastases.Method:Hematoxylin and eosin staining was used to assess the formation of breast cancer liver metastases and local invasion. Cancer stem cells surface markers (CD44, CD24, and Epithelial cell adhesion molecule [EpCAM]), luminal/mesenchymal markers (keratin8 and alpha smooth muscle actin), and proliferation markers (Ki-67 and cyclinD1) were detected by immunohistochemistry assays. Flow cytometry was used to evaluate the effect of transforming growth factor β1 on the CD44+/CD24− cancer stem cell population. Quantitative real-time polymerase chain reac...

TGFβ1 Promotes Breast Cancer Local Invasion and Liver Metastasis by Increasing the CD44high/CD24− Subpopulation

TGFβ1 Promotes Breast Cancer Local Invasion and Liver Metastasis by Increasing the CD44^high/CD24⁻ Subpopulation