Abstract
Hepatocellular carcinoma recurrence after curative treatment adversely influences clinical outcome. It is important to explore adjuvant therapies. This phase II/stage 1 multi-center, randomized trial investigated the safety, optimal dosage and preliminary efficacy of PI-88, a novel heparanase inhibitor, in the setting of post-operative recurrence of HCC according to a Simon's 2-stage design. Three groups were included: one untreated arm (Group A) and two PI-88 arms (Group B: 160 mg/day; Group C: 250 mg/day). Treatment groups received PI-88 over nine 4-week treatment cycles, followed by a 12-week treatment-free period. Safety and optimal dosage were assessed. Overall, 172 patients were randomized and 168 were included in the intention-to-treat (ITT) population. Treatment-related adverse effects included cytopenia, injection site hemorrhage, PT prolongation, etc. Four serious adverse events were possibly related to PI-88 treatment. One (1.8%) group B patients and six (10.5%) group C had hepatotoxicity-related withdrawals. Among the ITT population, 29 patients (50%) in Group A, 35 (63%) in Group B, and 22 (41%) in Group C remained recurrence-free at completion. Calculated T(1) value suggested 160 mg/day treatment satisfied the criteria for the next stage of the trial. PI-88 at 160 mg/day is optimal and safe, and shows preliminary efficacy as an adjunct therapy for post-operative HCC.
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