BMS-986205 and Nivolumab as First or Second Line Therapy in Treating Patients With Liver Cancer

PRIMARY OBJECTIVES: I. To obtain the safety and tolerability of BMS-986205 in combination with nivolumab in unresectable / metastatic hepatocellular carcinoma (HCC) in the first or second line setting using Common Terminology Criteria for Adverse Events (CTCAE) version (V)5.0 criteria. II. To determine efficacy as defined by objective response rate (ORR) of BMS-986205 in combination with nivolumab in unresectable / metastatic HCC in the first or second line setting using Response Evaluation Criteria in Solid Tumors (RECIST) (version 1.1). SECONDARY OBJECTIVES: I. To determine disease control rate (DCR), duration of response (DOR), progression free survival (PFS), and overall survival (OS) by RECIST 1.1 and ORR using immune RECIST (iRECIST) of BMS-986205 in combination with nivolumab in unresectable HCC. (Phase II) II. To further evaluate safety of BMS-986205 in combination with nivolumab in unresectable HCC. (Phase II) OUTLINE: This is a phase I, dose-escalation study of IDO1 inhibitor BMS-986205 followed by a phase II study. Patients receive IDO1 inhibitor BMS-986205 orally (PO) once daily (QD) on days 1-14 and nivolumab intravenously (IV) over 30 minutes on day 1. Courses repeat every 14 days in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up for 100 days, and then every 3 months thereafter.