BeiGene Announces Positive Global Phase 3 Trial Results for PD-1 Inhibitor Tislelizumab in First-Line Unresectable Hepatocellular Cancer

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Mark Lanasa M.D., Ph.D., Chief Medical Officer, Solid Tumors at BeiGene

CAMBRIDGE, U.S. & BASEL, Switzerland & BEIJING– BeiGene (NASDAQ: BGNE; HKEX: 06160; SSE: 688235), a global biotechnology company focused on developing innovative and affordable oncology medicines to improve treatment outcomes and access for patients worldwide, today announced that the global Phase 3 RATIONALE 301 trial with tislelizumab met its primary endpoint of non-inferior Overall Survival (OS) versus sorafenib as a first-line treatment in adult patients with unresectable hepatocellular carcinoma (HCC). The safety profile for tislelizumab was consistent with previous studies and no new safety signals were reported. More than 600 patients in the U.S., Europe, and Asia participated in the study.

HCC is the sixth most common type of cancer worldwide, accounting for more than 900,000 new cases in 2020i, and despite improvements in screening, surveillance rules, and imaging, more than two-thirds of patients with HCC present with advanced disease at diagnosisii.

“Patients with unresectable HCC face a devastating prognosis, with a median life expectancy of one year. Currently there are few treatment options if patients cannot tolerate TKI therapy or if their condition progresses,” said Mark Lanasa M.D., Ph.D., Chief Medical Officer, Solid Tumors at BeiGene. “We are encouraged by the outcome of the final analysis of RATIONALE 301 and look forward to sharing the full safety and efficacy results at an upcoming medical conference.”

RATIONALE 301 (NCT03412773) is a global, Phase 3, randomized, open-label study of tislelizumab compared with sorafenib as a first-line treatment in adult patients with unresectable HCC. The primary endpoint of the study is non-inferiority of OS between the two treatment groups. The key secondary endpoint is Overall Response Rate, as assessed by Blinded Independent Review Committee (BIRC) per RECIST v1.1. Other secondary endpoints include other efficacy assessments such as Progression-Free Survival, Durability of Response, and Time to Progression per BIRC, as well as measures of health-related quality of life, and safety and tolerability.