To explore the efficacy and safety of candonilimab plus bevacizumab for patients with advanced hepatocellular carcinoma who progressed on atezolizumab plus bevacizumab.

Atezolizumab plus bevacizumab is the first-line treatent for patients with advanced hepatocellular carcinoma. However, the second-line treatment is absent for patients who progressed on atezolizumab plus bevacizumab. Candonilimab is a humanized bisspecific monoclonal antibody against PD-1/ CTLA-4 IgG1. Candonilimab plus lenvatinib showed strong anti-tumor effect, with objective response of 44%. This single-arm, prospective, phase 2 trial is to explore the efficacy and safety of candonilimab plus bevacizumab for patients with advanced hepatocellular carcinoma who progressed on atezolizumab plus bevacizumab.

Inclusion Criteria:

• The diagnosis of HCC was based on the diagnostic criteria for HCC used by the European Association for the Study of the Liver (EASL)
• Patients must have at least one tumor lesion that can be accurately measured according to EASL criteria.
• Barcelona clinic liver cancer-stage C
• Eastern Cooperative Oncology Group performance status of 0 to 2
• Patients have received atezolizumab plus bevacizumab and the tumor have progressed. Patients have not received other treatmets except for the atezolizumab plus bevacizumab.
• No Cirrhosis or cirrhotic status of Child-Pugh class A only
• Not amendable to surgical resection ,local ablative therapy and any other cured treatment.
• The following laboratory parameters:

Hemoglobin ≥ 8.5 g/dL Total bilirubin ≤ 30mmol/L Serum albumin ≥ 32 g/L ASL and AST ≤ 5 x upper limit of normal Serum creatinine ≤ 1.5 x upper limit of normal INR ≤ 1.5 or PT/APTT within normal limits Absolute neutrophil count (ANC) >1,500/mm3

• Ability to understand the protocol and to agree to and sign a written informed consent document

Exclusion Criteria:

• Evidence of hepatic decompensation including ascites, gastrointestinal bleeding or hepatic encephalopathy
• Known history of HIV
• History of organ allograft
• Known or suspected allergy to the investigational agents or any agent given in association with this trial.
• Cardiac ventricular arrhythmias requiring anti-arrhythmic therapy
• Evidence of bleeding diathesis.
• Patients with clinically significant gastrointestinal bleeding within 30 days prior to study entry.
• Known central nervous system tumors including metastatic brain disease