The group of Babich developed a PSMA-targeting ligand, coupled to a p-(iodophenyl)acetic acid moiety, and after labeling with I-131, they showed a tumor uptake of ~6 %IA/g and a low kidney uptake of ~2 %IA/g at 24 h p.i. in LNCaP-bearing mice [136]. This evidence concerns the gene FOLH1 and neoplasm.