Syntheses of functionalized indium porphyrins for monoclonal antibody labeling

The syntheses and characterizations of five differently hydrosoluble monosubstituted aryl porphyrins are reported. Their metallation with indium-111 was achieved and provided tracers with strong specific activities. The covalent coupling between indium-111 porphyrins and BSA served as a model reaction for the definition of the best experimental coupling conditions; the transposition to the labeling of anti-CEA monoclonal antibody was realized. The conjugates exhibited an in vitro good mAb-labeling efficiency, as well as a good preservation of immunoreactivity.