Fig. 1.
Characterization of exosomes derived from bone marrow mesenchymal stem cells (BMSCs). a Cellular morphology (P1, P3) of BMSCs observed under an inverted fluorescence microscope. Scale bar: 100 μm. b Flow cytometry was used to analyze the surface antigens (CD44, CD105, CD31) in BMSCs. c, d The morphology of FBS-derived exosomes and BMSC-derived exosomes was observed under transmission electron microscopy (TEM). Scale bar: 50 μm. e Western blot was used to examine the expression of CD9, CD63 in BMSCs, and BMSC-derived exosomes