GRPR and breast carcinoma: Gibbens-Bandala et al. synthesized 177Lu-labeled polyamidoamine (PAMAM) dendrimer (DN) conjugated with paclitaxel (PTX) and surface functionalized with the Lys1Lys3 (DOTA)-bombesin (BN) peptide for selective targeting to gastrin-releasing peptide receptors (GRPr) which is overexpressed in breast cancer cells [29,30].