Hepatic arterial infusion chemotherapy and immune checkpoint inhibitors, alone or in combination, in advanced hepatocellular carcinoma with macrovascular invasion: a single-centre experience in Taiwan

Efficacy and safety of regorafenib in combination with immune checkpoint inhibitor therapy as second-line and third-line regimen for patients with advanced hepatocellular carcinoma: a retrospective study

Background

Despite the emergence of immune checkpoint inhibitors (ICIs) as first-line treatment for advanced hepatocellular carcinoma (HCC), there is an unmet need regarding subsequent treatments in patients that fail ICI. Regorafenib is a vascular endothelial growth factor receptor (VEGFR) inhibitor, which could increase programmed death-ligand 1 (PD-L1) expression in tumors and increase intra-tumoral CD8+ T-cell infiltration by normalizing the cancer vasculature and improving the efficacy of the programmed cell death protein 1 (PD-1) antibody. Thus, we evaluated the combination of regorafenib and a PD-1 inhibitor for advanced HCC patients that had failed combined tyrosine kinase inhibitors (TKIs) plus ICI.

Methods

Data of patients with advanced HCC who had failed combined TKIs plus ICI treatment and were afterwards treated with combined regorafenib plus a PD-1 inhibitor were reviewed. All patients had received PD-1 inhibitors as part of the first-line treatment and regorafenib every 4 weeks until disease progression, intolerable toxicities, or physician/patient withdrawal. The clinical data, previous treatment strategies, follow-up imaging results, and adverse events (AEs) during follow-ups were recorded. Common Terminology Criteria for Adverse Events (CTCAE) v. 5.0 was used to evaluate AEs and Response Evaluation Criteria in Solid Tumors (RECIST) v. 1.1 was used to evaluate response. The primary endpoint was safety, and the secondary endpoints were the objective response rate (ORR), progression-free survival (PFS), disease control rate (DCR), overall survival (OS), and duration of response (DOR).

Results

From November 15, 2020, to January 31, 2022, data of 17 patients with advanced HCC that met the criteria were reviewed. The cohort included 16 men and 1 woman with a median age of 54 years (interquartile range, 46 to 63 years). Sixteen patients had Child-Pugh class A (n=16, 94.12%) and one with class B (n=1, 15.9%) liver disease. Thirteen patients received second-line treatment, and the remaining patients received third-line treatment. All patients received at least 1 dose of PD-1 inhibitors. The median follow-up duration was 7.62 months. Twelve recipients experienced treatment-related AEs. The most frequent AE (≥5%) included fatigue (17.64%), diarrhea (17.65%), proteinuria (5.88%), bleeding gums (11.76%), and hypertension (11.76%). No grade-4 AE or new safety signals were identified. The ORR and DCR were 41.2% and 64.7%, respectively, and the median PFS was 5.09 months.

Conclusions

Regorafenib combined with PD-1 inhibitor is a promising regimen in treating patients with advanced HCC owing to its safety and effectiveness as well as low incidence of serious AEs with its use.

The worthy role of hepatic arterial infusion chemotherapy in combination with anti-programmed cell death protein 1 monoclonal antibody immunotherapy in advanced hepatocellular carcinoma

Systemic therapy remains the primary therapeutic approach for advanced hepatocellular carcinoma (HCC). Nonetheless, its efficacy in achieving control of intrahepatic lesions is constrained. Hepatic arterial infusion chemotherapy (HAIC) is a therapeutic approach that combines localized treatment with systemic antitumor effects, which aim is to effectively manage the progression of cancerous lesions within the liver, particularly in patients with portal vein tumor thrombosis (PVTT). Combining HAIC with anti-programmed cell death protein 1 (anti-PD-1) monoclonal antibody (mAb) immunotherapy is anticipated to emerge as a novel therapeutic approach aimed at augmenting the response inside the localized tumor site and achieving prolonged survival advantages. In order to assess the effectiveness, safety, and applicability of various therapeutic modalities and to address potential molecular mechanisms underlying the efficacy of HAIC-sensitizing immunotherapy, we reviewed the literature about the combination of HAIC with anti-PD-1 mAb therapies.