GRPR and neoplasm: The tracer, upon radiolabeling with gallium-67, showed high GRPR affinity (IC50 of 2.2 ± 0.2 nM), high uptake in T47D cells (58% after 2 h incubation), as well as high and specific tumor and pancreas uptake in T47D xenografts (8.67 ± 2.88 and 36.86 ± 3.58% IA/g, respectively at 4 h p.i.)(85).