Phase II Study of Avelumab in Patients with Advanced Hepatocellular Carcinoma Previously Treated with Sorafenib

Dae-Won Lee1, Eun Ju Cho1,2, Jeong-Hoon Lee1,2

  • 1Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea.

Abstract

Insights

Avelumab demonstrated moderate efficacy in advanced liver cancer patients previously treated with sorafenib. Longer sorafenib treatment duration correlated with improved outcomes and survival for hepatocellular carcinoma patients receiving avelumab.

Area of Science:

  • Oncology
  • Immunotherapy
  • Hepatocellular Carcinoma Research

Background:

  • Advanced hepatocellular carcinoma (HCC) presents a significant clinical challenge, particularly after failure of first-line therapies like sorafenib.
  • Understanding the efficacy of novel agents in the second-line setting is crucial for improving patient outcomes.

Purpose of the Study:

  • To evaluate the efficacy and safety of avelumab, an anti-programmed death-ligand 1 (PD-L1) antibody, in patients with advanced HCC who progressed on sorafenib.
  • To determine the objective response rate (ORR), time to progression (TTP), overall survival (OS), and disease control rate (DCR) of avelumab in this patient population.

Main Methods:

  • A single-arm, single-center, phase II clinical trial enrolled 30 patients with advanced HCC and Child-Pugh A score previously treated with sorafenib.
  • Patients received intravenous avelumab (10 mg/kg) every two weeks until disease progression or unacceptable toxicity.
  • Primary endpoint was ORR by RECIST v1.1; secondary endpoints included TTP, OS, DCR, and safety assessments.

Main Results:

  • The objective response rate (ORR) was 10.0% (3/30), with a disease control rate (DCR) of 73.3% (22/30).
  • Median time to progression (TTP) was 4.4 months and median overall survival (OS) was 14.2 months.
  • Longer prior sorafenib treatment duration (≥2.7 months) was associated with significantly improved TTP (6.5 vs. 1.8 months) and OS (19.0 vs. 7.8 months).
  • Avelumab was well-tolerated, with only grade 3 adverse events observed and no grade 4 events.

Conclusions:

  • Avelumab demonstrated moderate efficacy and a favorable safety profile in advanced HCC patients previously treated with sorafenib.
  • Prior duration of sorafenib therapy is a potential predictive biomarker for response to avelumab in advanced HCC.
  • Further investigation into predictive factors for immunotherapy response in HCC is warranted.