Fig. 1

Identification of mouse BMSC-derived exosomes. a After the osteogenic and adipogenic induction medium was added into the cells, the morphology of the cells was observed under a microscope (scale bar, 100 μm and 50 μm). b Flow cytometry was used to detect the expression of BMSC surface markers. c Transmission electron microscopy was performed to observe the morphology of exosomes (scale bar = 1 μm, arrows point to exosomes), and Western blot was used to analyze the expression of exosome surface marker protein