Fig. 2

Characterization of endothelial cells and endothelial exosomes. a The identification of endothelial cells by vWF (red) and DAPI (blue) (200×). b Exosomes were morphologically confirmed by TEM. c The diameter and size distribution of exosomes were analyzed using NTA. d Two exosome markers, namely, ALIX and TSG101, were clearly detected by western blot