Figure 2

From: Engineering exosomes as refined biological nanoplatforms for drug delivery

Figure 2

Schematic representation of the different types of exosomes drug delivery systems. Exosomes consist of a lipid bilayer that can be composed of lipids, which encloses an aqueous core. Both the lipid bilayer and the aqueous space can incorporate hydrophobic (A) or hydrophilic compounds (B), respectively. (C) Exosomes can be used for DNA, RNA and protein delivery. (D) Theranostic or imaging probes, specific targeting ligands and covalent linkage can be attached to exosome surface.