A Study of Combination with TBI-1401(HF10) and Ipilimumab in Japanese Patients with Unresectable or Metastatic Melanoma

The study is designed to assess efficacy and safety with repeated administration of intratumoral injections of TBI-1401(HF10) at 1x10\^7 TCID50/mL in combination with intravenous infusions of 3mg/kg ipilimumab in Japanese patients.

This is a single arm, open label Phase II study, to evaluate the efficacy and safety of TBI-1401(HF10) treatment in combination with the immunologic checkpoint inhibitor, ipilimumab (anti-CTLA-4 monoclonal antibody). The study population will include patients with Stage IIIB, IIIC or IV unresectable or metastatic malignant melanoma who are ipilimumab-eligible.

Patients will receive the dose of 1x10\^7 TCID50/mL TBI-1401(HF10) (for a total of 6 injections; the first 4 injections at 1-week intervals; the remaining 2 injections at 3-week intervals) + ipilimumab at 3 mg/kg (for a total of 4 intravenous infusions, each administered at 3-week intervals).

Following combination therapy, patients may continue to receive the 1x10\^7 TCID50/mL TBI-1401(HF10) alone for up to an additional 13 injections (total of 19 injections = 1 year) if they have tolerated the study treatment, are responding, have stable disease, or have progressive disease that is not clinically significant in the judgment of the Investigator.