Vittoria Massafra, Sofia Tundo, Aline Dietzig, Axel Ducret, Christian Jost, Christian Klein, Roland E. Kontermann, Hendrik Knoetgen, Martin Steegmaier, Andrea Romagnani and Yvonne A. Nagel J Immunol July 15, 2021, 207 (2) 493-504; DOI: https://doi.org/10.4049/jimmunol.2000252 Key Points Degradation of WT1 increases MHC I Ag presentation. Targeted protein degradation can enhance T cell activation and effector function. The combination of PROTACs and T cell bispecific Abs elicits antitumor activity.