Fig. 1

Characterization of macrophage-derived apoVs and apoVs uptake by MSCs. A TUNEL staining results in different groups. TUNEL positive stained cells were red. B Morphology of apoVs observed by TEM. C Particle size distribution of apoVs measured by NTA: the mean size ± SD of apoVs was 240.6 ± 115 nm. D MSCs were incubated with PKH-26-labeled apoVs (red) for 4 h and 8 h, respectively. The nuclei of MSCs were stained with DAPI (blue). The F-actin of MSCs was stained with phalloidin (green)