Nevena Damjanov, MD
Patients with hepatitis B virus (HBV) infection and HCC tend to live longer if both their HBV and HCC are treated. Liu and colleagues performed a meta-analysis of trials that addressed the question whether the same is true for patients with hepatitis C virus (HCV) infection and HCC treated with either interferon or direct-acting antivirals (DAA). They included 23, mostly retrospective, cohort studies in the final meta-analysis. Recurrence data were available in 18 studies, with 2013 patients receiving DAA therapy, 1091 patients receiving interferon therapy, and 1571 patients receiving no intervention. There was no significant difference in recurrence between the DAA group and the interferon group. The meta-analysis demonstrated that patients with HCV-related HCC treated with DAA had a lower risk for HCC recurrence (adjusted hazard ratio [HR] 0.55, 95% CI 0.41-0.74, P < .001; I2 66.6%, P < .001) and a better overall survival (OS) (adjusted HR 0.36, 95% CI 0.16–0.83, P = .017; I2 90.7%, P < .001) than patients with no intervention. The authors concluded that DAA therapy can prevent recurrence and improve OS of patients with HCV-related HCC, especially if a sustained virologic response is achieved.
Atezolizumab with bevacizumab is the current first-line standard of care for patients with unresectable HCC, offering an improved OS compared to sorafenib, as demonstrated in the phase 3 IMbrave150 study. Alternate combinations, such as atezolizumab and cabozantinib, are also being investigated in this setting. The COSMIC-312 phase 3 randomized controlled trial evaluated 837 patients with unresectable HCC who had not received previous systemic therapy. They were randomly assigned in a 2:1:1 ratio to receive cabozantinib plus atezolizumab (n = 432), sorafenib (n = 217), or single-agent cabozantinib (n = 188). Although the patients receiving atezolizumab + cabozantinib had a significantly longer median progression-free survival (6.8 vs 4.2 months; HR, 0.63; P = .001) than patients who received sorafenib, both groups had a similar median OS (15.4 vs 15.5 months; HR, 0.90; P = .44). The authors concluded that this combination requires more study in this patient population.
For patients with unresectable HCC who are unable to tolerate combination therapy in the first-line setting, single-agent therapy might be an option. Verset and colleagues reported the results of a phase 2 study evaluating pembrolizumab in this setting. Cohort 2 of the KEYNOTE-224 study evaluated 51 systemic therapy–naive patients with unresectable HCC who received pembrolizumab for up to 2 years. After 27 months of median follow-up, the median progression-free survival was 4 months (95% CI 2-8 months) and the OS was 17 months (95% CI 8-23 months). The objective response rate was 16% (95% CI 7%-29%). Grade ≥ 3 treatment-related adverse events were observed in 16% of patients. In this prospective study, pembrolizumab provided durable antitumor activity, a promising OS, and a safety profile consistent with previous observations.
