Figure 1.

Characterization of exosomes.

(A) Exosomes were visualized using electron microscopy. The diameters of the exosomes were approximately 200 nm. Scale bar: 200 nm. (B) Particle size analysis of exosomes. (C) Western blot results for specific marker (CD63, TSG101, HSP70, and Alix) expression in the exosomes and exosome-free media (Exo-free). All experiments were repeated three times. Alix: Apoptosis-linked gene-2 interacting protein X; HSP70: heat shock protein 70; TSG101: tumor susceptibility gene 101.