Fig. 1

Characterization of MSCs and exosomes. a Differentiation of MSCs into three cellular lineages. i) Microscopy images of MSCs, ii) MSCs stained with oil red O at 7 days after adipogenic differentiation culture, iii) MSCs stained with alizarin red staining at 30 days after osteogenic differentiation culture, and iv) MSCs stained with alcian blue staining at 18 days after chondrogenic differentiation culture. b Flow cytometric analysis of MSCs