Article
作者: Zana, Aureliano ; Gennari, Cesare ; Galbiati, Andrea ; Bocci, Matilde ; Bisbal Lopez, Lydia ; Neri, Dario ; Cazzamalli, Samuele ; Gilardoni, Ettore ; Pignataro, Luca ; Ravazza, Domenico ; Dakhel Plaza, Sheila ; Dal Corso, Alberto ; Scheuermann, Jörg ; Principi, Lucrezia
Immune-stimulating antibody conjugates (ISACs) equipped with imidazoquinoline (IMD) payloads can stimulate endogenous immune cells to kill cancer cells, ultimately inducing long-lasting anticancer effects. A novel ISAC was designed, featuring the IMD Resiquimod (R848), a tumor-targeting antibody specific for Carbonic Anhydrase IX (CAIX) and the protease-cleavable Val-Cit-PABC linker. In vitro stability analysis showed not only R848 release in the presence of the protease Cathepsin B but also under acidic conditions. The ex vivo mass spectrometry-based biodistribution data confirmed the low stability of the linker-drug connection while highlighting the selective accumulation of the IgG in tumors and its long circulatory half-life.