Fig. 3.
Schematic illustration of preparation of ETB/DOX combination co-delivery nanocarriers and synergistic therapy of ETB and DOX. After administration, MSNs were positively charged at extracellular environment leading to an easy internalization by tumor cells. As ETB was loaded in the exterior lipid bilayer and the controlled releaseability of MSN, after entering into tumor cells ETB released faster than DOX.