Fig. 4

Migration and tube incorporation ability of EPCs was elevated by miR-126-loaded exosomes. a Representative images show DAPI-stained EPCs (blue). Bar, 100 μm. b Number of migrated cells was calculated manually and presented as mean ± SD (n = 4). c DiI-positive incorporated EPCs could be observed in the HUVEC-formed tube structure. Bar, 200 μm. d Number of DiI-positive incorporated EPCs was counted and presented as mean ± SD (n = 4). *P < 0.05, **P < 0.01, ***P < 0.001