A Study of CDX-3379 and Cetuximab and in Patients With Advanced Head and Neck Squamous Cell Carcinoma

CDX-3379 is a fully human monoclonal antibody that binds to a molecule called human epidermal growth factor receptor 3 (HER3 or ErbB3) found on certain cells and may act to promote anti-tumor effects. Cetuximab is a human monoclonal antibody that blocks EGFR, a protein receptor that regulates cell growth. This study will evaluate the safety, tolerability and efficacy of CDX-3379 in combination with cetuximab in patients with advanced head and neck squamous cell carcinoma who have previously received cetuximab and progressed. Eligible patients that enroll in the study will be given the dose of 12 mg/kg CDX-3379 once every 3 weeks in combination with 400 mg/m2 cetuximab on the first day followed by weekly doses of 250 mg/m2 cetuximab. Up to 45 patients will be enrolled. All patients enrolled in the study will be closely monitored to determine if there is a response to the treatment as well as for any side effects that may occur.