GRPR and breast carcinoma: A nanosystem based on the 177Lu-labeled polyamidoamine (PAMAM) dendrimer (DN) loaded with paclitaxel (PTX) and functionalized on the surface with the DOTA-BBN peptide was designed for specific targeting to GRPR in T47D breast cancer xenografts (Gibbens-Bandala et al., 2019a).