Figure 1. Probes and protocols for tumor-targeted radionuclide therapy.
A: Design of liposome-based radiotracers enabling MPS clearance of radioactivity via enzymatic cleavage of ester groups. Ether groups served as non-cleavable controls. B-D: PET scans of non-cleavable (B), esterase-labile (C), and folate-targeted esterase-labile liposomes (D) labeled with 124I and 131I in subcutaneous and orthotopic pancreatic tumors in mice. Images reproduced with permission from ref 14.
