A retrospective pilot study of transarterial chemoembolisation using camrelizumab-eluting Callisphere beads for unresectable hepatocellular carcinoma

Background Our objective was to assess the efficacy and safety of initial hepatic arterial infusion of chemotherapy combined with transarterial chemoembolisation using camrelizumab-eluting Callisphere beads (camrelizumab-DEB-TACE) for treating unresectable hepatocellular carcinoma (HCC). Methods Enrolment included patients with unresectable HCC who underwent camrelizumab-DEB-TACE treatment from September 2021 to February 2023. The assessment included the examination of tumour response, overall survival (OS), progression-free survival (PFS), and the monitoring of adverse events (AEs). Results Twenty-one patients were included in the study. The objective response rates (ORR) and disease control rates (DCR) were 55.0% and 90.0% at 1 month and 57.9% and 78.9% at 3 months, respectively. The median PFS and OS were 7.4 and 15.5 months months, respectively. Among the 21 patients, 4 underwent more than 2 procedures of camrelizumab-DEB-TACE, with a mean of 1.9 ± 1.1 procedures (range: 1–4) per patient. No severe complications or treatment-related mortalities were observed. In addition, no patient developed severe AEs related to camrelizumab, such as reactive cutaneous capillary endothelial proliferation, immune-related pneumonia, or immune-related myocarditis. Nineteen patients experienced at least one type of AEs related to DEB-TACE, with abdominal pain (n = 16, 76.2%) being the most prevalent AE. Conclusion Camrelizumab-DEB-TACE demonstrated effectiveness and safety as a treatment for unresectable HCC, with no occurrence of severe camrelizumab-related AEs.