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Oecal, Osman; Schuette, Kerstin; Kupcinskas, Juozas; Morkunas, Egidijus; Jurkeviciute, Gabija; de Toni, Enrico N.; Ben Khaled, Najib; Berg, Thomas; Malfertheiner, Peter; Klumpen, Heinz Josef; Sengel, Christian; Basu, Bristi; Valle, Juan W.; Benckert, Julia; Gasbarrini, Antonio; Palmer, Daniel; Seidensticker, Ricarda; Wildgruber, Moritz; Sangro, Bruno; Pech, Maciej; Ricke, Jens und Seidensticker, Max (2021): Baseline Interleukin-6 and-8 predict response and survival in patients with advanced hepatocellular carcinoma treated with sorafenib monotherapy: an exploratory post hoc analysis of the SORAMIC trial. In: Journal of Cancer Research and Clinical Oncology, Bd. 148, Nr. 2: S. 475-485

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Abstract

Purpose To explore the potential correlation between baseline interleukin (IL) values and overall survival or objective response in patients with hepatocellular carcinoma (HCC) receiving sorafenib. Methods A subset of patients with HCC undergoing sorafenib monotherapy within a prospective multicenter phase II trial (SORAMIC, sorafenib treatment alone vs. combined with Y90 radioembolization) underwent baseline IL-6 and IL-8 assessment before treatment initiation. In this exploratory post hoc analysis, the best cut-off points for baseline IL-6 and IL-8 values predicting overall survival (OS) were evaluated, as well as correlation with the objective response. Results Forty-seven patients (43 male) with a median OS of 13.8 months were analyzed. Cut-off values of 8.58 and 57.9 pg/mL most effectively predicted overall survival for IL-6 and IL-8, respectively. Patients with high IL-6 (HR, 4.1 [1.9-8.9], p < 0.001) and IL-8 (HR, 2.4 [1.2-4.7], p = 0.009) had significantly shorter overall survival than patients with low IL values. Multivariate analysis confirmed IL-6 (HR, 2.99 [1.22-7.3], p = 0.017) and IL-8 (HR, 2.19 [1.02-4.7], p = 0.044) as independent predictors of OS. Baseline IL-6 and IL-8 with respective cut-off values predicted objective response rates according to mRECIST in a subset of 42 patients with follow-up imaging available (IL-6, 46.6% vs. 19.2%, p = 0.007;IL-8, 50.0% vs. 17.4%, p = 0.011). Conclusion IL-6 and IL-8 baseline values predicted outcomes of sorafenib-treated patients in this well-characterized prospective cohort of the SORAMIC trial. We suggest that the respective cut-off values might serve for validation in larger cohorts, potentially offering guidance for improved patient selection.

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