FIGURE 3 from Maternal Embryonic Leucine Zipper Kinase is Associated with Metastasis in Triple-negative Breast Cancer

Inhibitory effect of MELK-In-17 on anchorage-independent growth, motility, CSC properties, and EMT transition in TNBC cells. A–D, MELK-In-17 inhibited anchorage-independent growth (A), suppressed migration and invasion (B), reduced mammosphere formation (C), and reduced CD44+/CD24− and ALDH1+ CSC subpopulations (D) in TNBC cells. In A, the anchorage-independent growth was determined using a soft-agar assay at week 3 following treatment. In B, cells were pretreated with MELK-In-17 for 2 hours and then assayed for migration and invasion in the presence of MELK-In-17. In C, cells were seeded for mammosphere formation and the next day treated with MELK-In-17. In D, cells were treated with MELK-In-17 for 48 hours and then subjected to flow cytometry analysis. E, Western blot analysis of the effects of treatment with MELK-In-17 on the expression of EMT markers. α-Tubulin was used as a loading control. Band intensity of proteins is normalized to that of α-Tubulin. In A–C, data are presented as mean ± SD. *, P < 0.05; **, P < 0.01; ***, P < 0.001; ****, P < 0.0001.