NN3201 is a c-Kit-targeting antibody-drug conjugate (ADC) with high affinity (KD = 0.19 pM). NN3201 is composed of 4-(3-Tosyl-2-(tosylmethyl)propanoyl)benzoic acid-glu(PEG24-Me)-val-cit-NH-benzyloxyformic acid-MMAE (HY-178219) and an anti-c-Kit human monoclonal antibody NN2101 (HY-P991293). NN3201 rapidly internalizes and inhibits stem cell factor (SCF)-driven signaling, thereby delivering its payload to induce cell cycle arrest and apoptosis. NN3201 exhibits no Fc-mediated effector functions antibody-dependent cell-mediated cytotoxicity (ADCC)/complement-dependent cytotoxicity (CDC) due to reduced FcgammaR binding. NN3201 exhibits significant c-Kit-dependent anti-tumor efficacies in various tumor models. NN3201 can be used in small cell lung cancer (SCLC) and gastrointestinal stromal tumor (GIST) and acute myeloid leukemia (AML) research[1][2].
