The purpose of this study was to test a suboptimal single dose of mipasetamab uzoptirine (ADCT-601), an ADC targeting the AXL protein, in combination with ultrasound-induced cavitation in a preclinical mouse model of renal cancer...This was demonstrated for a suboptimal ADC dose, indicating that ultrasound-mediated drug delivery could be used to reduce the administered dose while preserving therapeutic efficacy. These preclinical data warrant further evaluation of this promising combination in the clinic.
Notably, ADCT-601 had antitumor activity in a monomethyl auristatin E-resistant lung-cancer model and synergized with the PARP inhibitor olaparib in a BRCA1-mutated ovarian cancer model. ADCT-601 was well tolerated at doses of up to 6 mg/kg and showed excellent stability in vivo. These preclinical results warrant further evaluation of ADCT-601 in the clinic.
This study demonstrated that ADCT-601 induced a potent and specific in vitro and in-vivo anti-tumor activities in AXL expressing ACC models and suggests further development of ADCT-601 in biomarker driven clinical trials.