Abstract
Liver cancer, specifically hepatocellular carcinoma (HCC), is the sixth most common cancer and the third leading cause of cancer mortality worldwide. The development of effective systemic therapies, particularly those involving immune-checkpoint inhibitors (ICIs), has substantially improved the outcomes of patients with advanced-stage HCC. Approximately 30% of patients are diagnosed with early stage disease and currently receive potentially curative therapies, such as resection, liver transplantation or local ablation, which result in median overall survival durations beyond 60 months. Nonetheless, up to 70% of these patients will have disease recurrence within 5 years of resection or local ablation. To date, the results of randomized clinical trials testing adjuvant therapy in patients with HCC have been negative. This major unmet need has been addressed with the IMbrave 050 trial, demonstrating a recurrence-free survival benefit in patients with a high risk of relapse after resection or local ablation who received adjuvant atezolizumab plus bevacizumab. In parallel, studies testing neoadjuvant ICIs alone or in combination in patients with early stage disease have also reported efficacy. In this Review, we provide a comprehensive overview of the current approaches to manage patients with early stage HCC. We also describe the tumour immune microenvironment and the mechanisms of action of ICIs and cancer vaccines in this setting. Finally, we summarize the available evidence from phase II/III trials of neoadjuvant and adjuvant approaches and discuss emerging clinical trials, identification of biomarkers and clinical trial design considerations for future studies.
Key points
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Approximately 30% of patients with hepatocellular carcinoma (HCC) undergo resection or local ablation as primary treatment. However, the probability of recurrence at 3 years is 30–50% and is associated with the size of the main tumour, microvascular invasion and poor differentiation degree.
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In the phase III IMbrave 050 trial, patients with HCC at high risk of recurrence after resection or local ablation who received adjuvant atezolizumab plus bevacizumab had significantly improved recurrence-free survival compared with those who had active surveillance.
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Neoadjuvant exposure to immunotherapies enables more-efficient interactions among T cells, antigen-presenting cells and cancer cells owing to a larger tumour burden compared with the adjuvant approach.
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Neoadjuvant and adjuvant administration of immunotherapies results in significantly improved outcomes compared with adjuvant administration alone in patients with melanoma or non-small-cell lung cancer.
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Phase II trials of cancer vaccines in combination with immune-checkpoint inhibitors in patients with melanoma or pancreatic adenocarcinoma have shown signals of efficacy; these approaches are currently being explored in HCC.
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Acknowledgements
The authors thank M. Zeitlhoefler (Icahn School of Medicine at Mount Sinai and IDIBAPS) for his help in preparing the tables for this manuscript. J.M.L. is supported by grants from Asociación Española Contra el Cáncer (Proyectos Generales: PRYGN223117LLOV), the European Commission (Horizon Europe-Mission Cancer, THRIVE, Ref. 101136622), by an Accelarator Award from Cancer Research UK, Fondazione per la Ricerca sul Cancro (AIRC) and Fundación Científica de la Asociación Española Contra el Cáncer (FAECC) (HUNTER, Ref. C9380/A26813), Generalitat de Catalunya (AGAUR, 2021-SGR 01347), Acadèmia de Ciències Mèdiques i de la Salut de Catalunya i Balears; NIH (R01-CA273932-01, RO1DK56621 and RO1DK128289), the Samuel Waxman Cancer Research Foundation and the Spanish National Health Institute (MICINN, PID2022-139365OB-I00).
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J.M.L. receives research support from Bayer HealthCare Pharmaceuticals, Eisai Inc. and Sagimet; has received consulting fees from AstraZeneca, Bayer HealthCare Pharmaceuticals, Bristol–Myers Squibb, Eisai Inc., Exelixis, Genentech, Glycotest, Merck, Moderna and Roche. M.Y. has received institutional research support from Bristol–Myers Squibb, Genentech and Incyte; honoraria from Astrazeneca, Eisai, Exelixis, Genentech, Hepion and Replimune; and is a co-founder of and holds equity in Adventris Pharmaceuticals. A.G.S. has served as a consultant or on advisory boards for AstraZeneca, Bayer, Boston Scientific, Eisai, Exact Sciences, Exelixis, Freenome, FujiFilm Medical Sciences, GRAIL, Genentech, Glycotest, Roche and Universal Dx. T.U.M. has served on advisory and/or data safety monitoring boards for AbbVie, Arcus, Astellas, AstraZeneca, Atara, Boehringer Ingelheim, Bristol–Meyers Squibb, Celldex, Chimeric, DBV Technologies, DrenBio, G1 Therapeutics, Genentech, Glenmark, Merck, NGMbio, Regeneron, Rockefeller University, Simcere and Surface; and received research grants from Boehringer Ingelheim, Bristol–Myers Squibb, Merck and Regeneron. M.K. has received research support from Bayer Pharmaceutical, Chugai, Eisai, Ono Pharmaceutical and Takeda; consultancy or lecture fees from AbbVie, AstraZeneca, Bayer, Chugai, EA Pharma, Eisai, Eli Lilly, GE Healthcare, Gilead Sciences, Merck, Otsuka, Roche, Sumitomo Dainippon Pharma and Takeda. R.P., M.S., E.P. and R.S.F. declare no competing interests.
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Nature Reviews Clinical Oncology thanks S.-Q. Cheng; A. Kaseb, who co-reviewed with M. LaPelusa; T. Pawlik; and S. Qin for their contribution to the peer review of this work.
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Llovet, J.M., Pinyol, R., Yarchoan, M. et al. Adjuvant and neoadjuvant immunotherapies in hepatocellular carcinoma. Nat Rev Clin Oncol 21, 294–311 (2024). https://doi.org/10.1038/s41571-024-00868-0
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DOI: https://doi.org/10.1038/s41571-024-00868-0