Single-step Antigen Loading and TLR Activation of Dendritic Cells in Melanoma Patients

Objectives: This is an exploratory study, consisting of two parts. In part I dose escalation is performed and the primary objective is the safety of different doses of TLR-DC and Trimix DC. In part II Trimix DC vaccination will be compared with TLR-DC vaccination and the primary objective of this part is the immunological response, with toxicity and clinical efficacy being secondary objectives. These studies will provide important data on the safety and immunological effects of TLR-DC and Trimix DC. Study design: Part I of this study is an open label dose escalation study. Part II of this study is an open label randomized phase II study. Study population: Our study population consists of melanoma patients, with proven expression of melanoma associated tumor antigens gp100 and tyrosinase. Melanoma patients with regional lymph node metastasis in whom a radical lymph node dissection is performed within 2 months of inclusion in this study (further referred to as stage III) and melanoma patients with measurable distant metastases (further referred to as stage IV) will be included.