R-DXd demonstrated potent antitumor activity against CDH6-expressing tumors in mice and an acceptable safety profile in monkeys. These findings indicate the potential of R-DXd as a new treatment option for patients with CDH6-expressing serous-type ovarian cancer and renal cell carcinoma in a clinical setting.
DXd demonstrated cytotoxicity in all PDC models, regardless of CDH6 expression, whereas control ADC and anti-CDH6 naked antibody showed no growth inhibitory effects. Conclusions CDH6 is an attractive target for EOC and R-DXd is a promising agent for the treatment of CDH6-expressing EOC.
Results As of 03 March 2023, 42 patients with OVC had received R-DXd at 4.8 (n = 7), 6.4 (n = 20), and 8.0 (n = 15) mg/kg: 40 (95%) had platinum-resistant disease, 29 (69%) had received prior bevacizumab, and 26 (62%) had received prior PARP inhibitors. Eleven of 21 GCIG-evaluable patients (52%) had a CA-125 response. Conclusions In heavily pretreated OVC patients without CDH6 preselection, R-DXd demonstrated acceptable safety and encouraging preliminary efficacy, which supports further clinical development in OVC.