UV1 Vaccination Plus Nivolumab and Ipilimumab in Treatment of Melanoma

This is a randomized, open label study to investigate efficacy and safety of UV1 vaccination in combination with nivolumab and ipilimumab as first line treatment of adult patients with histologically confirmed unresectable metastatic melanoma. Patients in the experimental arm will receive 8 UV1 vaccinations over 4 cycles of nivolumab and ipilimumab. Patients in the control arm will receive 4 cycles of nivolumab and ipilimumab. Patients in both arms will start maintenance therapy 6 weeks after the last dose of induction therapy, nivolumab at a dose of 480 mg every 4 weeks. All patients will be followed up until death or until the end of the study. To support the Extended Exploratory Cohort of the study, an additional 20 patients at selected sites will be enrolled in a single arm UV1 cohort for collection of additional biological material. These patients are in addition to the 156 randomized patients in the main part of the study and will not be included in the main analysis of the study.