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Finn, Richard S; Ryoo, Baek-Yeol; Merle, Philippe; Kudo, Masatoshi; Bouattour, Mohamed; Lim, Ho Yeong; Breder, Valeriy; Edeline, Julien; Chao, Yee; Ogasawara, Sadahisa; Yau, Thomas; Garrido, Marcelo; Chan, Stephen L; Knox, Jennifer; Daniele, Bruno; Ebbinghaus, Scot W; Chen, Erluo; Siegel, Abby B; Zhu, Andrew X; Cheng, Ann-Lii
Journal of clinical oncology, 2020-Jan-20, 2020-01-20, 20200120, Volume: 38, Issue: 3Journal Article
Pembrolizumab demonstrated antitumor activity and safety in the phase II KEYNOTE-224 trial in previously treated patients with advanced hepatocellular carcinoma (HCC). KEYNOTE-240 evaluated the efficacy and safety of pembrolizumab in this population. This randomized, double-blind, phase III study was conducted at 119 medical centers in 27 countries. Eligible patients with advanced HCC, previously treated with sorafenib, were randomly assigned at a two-to-one ratio to receive pembrolizumab plus best supportive care (BSC) or placebo plus BSC. Primary end points were overall survival (OS) and progression-free survival (PFS; one-sided significance thresholds, = .0174 final analysis and = .002 first interim analysis, respectively). Safety was assessed in all patients who received ≥ 1 dose of study drug. Between May 31, 2016, and November 23, 2017, 413 patients were randomly assigned. As of January 2, 2019, median follow-up was 13.8 months for pembrolizumab and 10.6 months for placebo. Median OS was 13.9 months (95% CI, 11.6 to 16.0 months) for pembrolizumab versus 10.6 months (95% CI, 8.3 to 13.5 months) for placebo (hazard ratio HR, 0.781; 95% CI, 0.611 to 0.998; = .0238). Median PFS for pembrolizumab was 3.0 months (95% CI, 2.8 to 4.1 months) versus 2.8 months (95% CI, 2.5 to 4.1 months) for placebo at the first interim analysis (HR, 0.775; 95% CI, 0.609 to 0.987; = .0186) and 3.0 months (95% CI, 2.8 to 4.1 months) versus 2.8 months (95% CI, 1.6 to 3.0 months) at final analysis (HR, 0.718; 95% CI, 0.570 to 0.904; = .0022). Grade 3 or higher adverse events occurred in 147 (52.7%) and 62 patients (46.3%) for pembrolizumab versus placebo; those that were treatment related occurred in 52 (18.6%) and 10 patients (7.5%), respectively. No hepatitis C or B flares were identified. In this study, OS and PFS did not reach statistical significance per specified criteria. The results are consistent with those of KEYNOTE-224, supporting a favorable risk-to-benefit ratio for pembrolizumab in this population.
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