A Trial of AK104 or AK112 in Combination With Axitinib in Patients With Metastatic Mucosal Melanoma

The planned cohorts in part A were axitinib 5mg twice a day plus AK104 or AK112 every 3 weeks. A minimum of three patients were initially enrolled at the first dose level. If a dose-limiting toxicity occurred, then the cohort would be expanded to a total of six patients. Responses were evaluated by investigators using both RECIST version 1.1 and Immune-Related RECIST (irRECIST). Patients with progressive disease or an intolerant toxicity were taken off the study. Patients who initially developed progressive disease per RECIST version 1.1 were allowed to continue therapy if the investigator considered patients to be benefiting from the treatment per irRECIST. Any dose-reduction cohort that did not exceed the maximum-tolerated dose could be expanded in part B for additional evaluation of safety and clinical activity. The primary end point of this study was dose-limiting toxicity within the first 4 weeks of treatment with AK104 or AK112 plus axitinib in part A.