Prognostic Biomarker NUMB Is Inhibited by Breast Cancer Cell Exosomes to Promote Breast Cancer Progression

Figure 1

Isolation and identification of exosomes from MDA-MB-231 breast cancer cells. (a). Observation of the MDA-MB-231-exosome structure under electron microscopy (scale bar: 200 nm); (b). Detection of CD9 and CD63 expressions by Western blot; (c). After PKH67 labeling exosomes, they were added to breast cancer cells in vitro. From left to right, DAPI, PKH67, and combined figures (scale bar: 50 μm).

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