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Immune checkpoint inhibitors and tyrosine kinase inhibitors in patients with advanced hepatocellular carcinoma: Does the sequence matter? | LitMetric

AI Article Synopsis

  • - Combination therapy using immune checkpoint inhibitors (ICI) and antivascular endothelial growth factor (anti-VEGF) is the standard treatment for advanced hepatocellular carcinoma (aHCC), but some patients may only receive single-agent therapies like tyrosine kinase inhibitors (TKIs) or ICI monotherapy due to health or resource constraints.
  • - The study looked at a group of patients with aHCC who were treated with both TKIs and ICIs, comparing those who started with TKIs first versus those who started with ICIs to see how the order impacted response rates and safety.
  • - Results showed no significant differences in objective response rates, disease control rates, progression-free survival, or overall survival between the two treatment sequences,

Article Abstract

Introduction: Combination therapy with immune checkpoint inhibitor (ICI) and antivascular endothelial growth factor (anti-VEGF) is currently the first line treatment for advanced hepatocellular carcinoma (aHCC). However, there are many patients who may not be able to receive combination therapy due to underlying comorbidities or resource limitations. For these patients, systemic treatment options include single agent tyrosine kinase inhibitors (TKIs) or ICI monotherapy. However, whether an optimal sequence of systemic therapy exists remains unknown. We aim to explore the impact of sequencing of TKI and ICI therapy in terms of response rates and to examine the safety of their use in sequential order.

Methods: Patients with aHCC treated with both ICI and TKI between December 30, 2013 and June 13, 2018 were retrospectively identified. Patients were classified into two groups: those who received TKI in the first-line (TKI1), followed by ICI (ICI2) and those who received ICI (ICI1) in the first-line followed by TKI (TKI2). The primary objective of the study was to identify differences in objective response rate (ORR) and disease control rate (DCR), as evaluated based on response evaluation criteria in solid tumor v1.1 for TKI1, TKI2, ICI1, and ICI2. Secondary objectives included comparison of progression free survival (PFS) for each line of therapy, overall survival (OS) and adverse events (AEs).

Results: Twenty-seven and 23 patients were classified into group 1 and 2, respectively. Objective response rates of TKI1 and TKI2 were 3.8% and 17.6%, respectively (p = .28); DCR to TKI1 versus TKI2 was 23.1% versus 35.3% (p = .49). ORRs of ICI1 and ICI2 were 8.7% and 14.3%, respectively (p = .66); DCR to ICI2 versus ICI1 was 56.5% versus 42.9% (p = .37). Median PFS was not significant between TKI1 and TKI2 (PFS 3.06 versus 1.61 months, p = .097) as well as between ICI2 and ICI1 (PFS 1.84 versus 2.37 month, p = .32). Median OS was also not significantly different between both groups (OS 20.63 versus 13.93 months, p = .20) on univariable and multivariable analysis (OS adjusted hazard ratio [HR] 2.07, 95% CI .83-5.18, p = .118). The proportion of patients who experienced adverse events of any grade was similar in both groups (TKI1 59.3% versus TKI2 52.2%; ICI1 78.3% versus ICI2 70.4%).

Conclusion: Our study suggests that the sequence of TKI versus ICI therapy in patients with aHCC may not matter, given similar efficacy and toxicity profile when either agent is received in the first or second-line setting. This finding is of value in the real-world setting, where patients may be frail or have comorbidities that render them unable to tolerate combination therapy (ICI and TKI/anti-VEGF). For these patients, sequential exposure to both classes of drugs (ICI and TKI) may be a suitable option.

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Source
http://dx.doi.org/10.1111/ajco.13837DOI Listing

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