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. 2020 Aug 14;10:13838. doi: 10.1038/s41598-020-70788-3

Figure 6.

Figure 6

Bone metastasizing breast cancer cells acquire a mesenchymal phenotype. (A) Representative bright field images of in vitro cultured 4T1 and 4T-Bone cells, ×20 Magnification. Inset depicts an enlarged field. (B, C) qPCR analysis of the expression of EMT (B) and osteomimicry (C) related genes from 4T1 and 4T-Bone cell lines in vitro. Results presented are average of three biological repeats, normalized to 4T1 group. Paired t-test; *p < 0.05. Error bars represent SD of biological repeats. (D) Representative images of 4T1 and 4T-Bone breast cancer tissues showing (from left to right): H&E staining, scale bar-200 μm; immunofluorescence staining of Ecad (red); pan-cytokeratin (yellow); vimentin (pink); Ncad (green), nuclei were stained with DAPI (blue), scale bars-25 μm. (EH) Quantification of IHC staining showed in (D), each dot represents a different field of view from multiple slides; n = 3 mice per group. Mean fluorescent intensity (MFI) was quantified using ImageJ and normalized to secondary antibody-only controls. Mann–Whitney test; *p < 0.05. (I) qRT-PCR analysis of EMT-related gene expression in primary 4T1 and 4T-Bone breast tumors. Results are presented as fold change of the average expression in 4T1 tumors. Each dot represents a different mouse. n = 6–9 mice, as indicated in graphs; Error bars represent SEM. *p < 0.05; Mann–Whitney test.