[Antibody-drug conjugates as new therapeutic agents in uro-oncology].

Antibody-drug conjugates represent a new class of therapeutic agents that are already being used in the field of uro-oncology. They consist of an antibody directed against a specific tumour antigen linked to a cytotoxic substance ("payload") which acts after internalisation into the tumour cell and its release. Currently, approval in the European Union is restricted to enfortumab vedotin which is directed against nectin‑4 and carries the microtubule-inhibiting active ingredient monomethyl auristatin E (MMAE). Enfortumab vedotin is approved for locally advanced or metastatic urothelial carcinoma in the third line of therapy after platinum-based chemotherapy and after therapy with a programmed cell death (ligand) 1 (PD-[L]1) immune checkpoint inhibitor. However, an expansion of the indication of enfortumab vedotin as monotherapy and in combination with PD-(L)1 immune checkpoint inhibitors, as well as approval of other antibody-drug conjugates is expected in the future. This could sustainably change the therapy sequence in urothelial carcinoma. Currently, several clinical trials are recruiting in different therapeutic settings. This article presents the new substance class of antibody-drug conjugates, their mechanism of action, their representatives and clinical studies, and points out practice-relevant side effects and how to deal with them.