Refilling drug delivery depots through the blood

Drug delivery depots used in the clinic today are single use, with no ability to refill once exhausted of drug. Our system exploits nucleic acid complementarity to refill drug-delivering depots through the blood. The utility of this approach is demonstrated by its ability to inhibit tumor growth to a greater extent than strategies that rely on enhanced permeability and retention alone. We anticipate our approach will be directly applicable to therapies for many diseases, including cancer, wound healing, and inflammation, and for drug reloading of vascular grafts and stents.