and therapeutic options, PAD and other ischemia-related diseases may benefit from the use
of long circulating nanoparticles as imaging probes and/or drug delivery vehicles.
Polyethylene glycol (PEG)-conjugated nanoparticles have shown shortened circulation half-
lives in vivo when injected multiple times into a single subject. This phenomenon has
become known as the accelerated blood clearance (ABC) effect. The phenomenon is of …