Researchers from Multitude Therapeutics Inc. have reported the preclinical profile of AMT-253, a MUC18-targeting antibody-drug conjugate (ADC) under development for the treatment of melanoma. It comprises the anti-MUC18 humanized antibody pAb253-H linked to T1000 exatecan payload and showed superior antitumor efficacy than the traditional vc-MMAE-based ADC AMT-253-M.