A Phase 1 Study Investigating the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics, and Preliminary Antitumor Activity of BGB-B2033, Alone or in Combination With Tislelizumab With or Without Bevacizumab, in Participants With Selected Advanced or Metastatic Solid Tumors
This is a first-in-human (FIH) clinical study designed to evaluate the safety, tolerability, pharmacokinetics (PK), pharmacodynamics (PD), and anti-tumor activity of BGB-B2033 administered as monotherapy and in combination with tislelizumab, with or without bevacizumab. The study will enroll participants with locally advanced or metastatic hepatocellular carcinoma (HCC), alpha-fetoprotein (AFP)-producing gastric cancer (GC), extragonadal yolk sac tumors/non-dysgerminomas, or glypican-3 (GPC3)-positive squamous non-small cell lung cancer (NSCLC).
• Participants must have one of the following unresectable, locally advanced, or metastatic tumor types:
‣ Hepatocellular carcinoma (HCC): Histologically or cytologically confirmed HCC that is either Barcelona Clinic Liver Cancer (BCLC) Stage C, or BCLC Stage B that is not amenable to, or has progressed after, loco-regional therapy and is not eligible for a curative treatment approach.
⁃ Alpha-fetoprotein (AFP)-producing gastric cancer (GC): Histologically confirmed GC with AFP \> 20 ng/mL in blood or tumor tissue positive for AFP by a validated immunohistochemistry (IHC) assay based on local or central testing.
⁃ Germ cell tumors: Histologically confirmed germ cell tumors including extragonadal yolk sac tumors (e.g., located in the mediastinum, vagina, brain, retroperitoneum), and non-dysgerminomas for which no further curative systemic treatment options exist.
⁃ Glypican-3 (GPC3)-positive squamous non-small cell lung cancer (NSCLC): Histologically confirmed GPC3-positive squamous NSCLC with prior exposure to a checkpoint inhibitor (CPI).
• At least one evaluable lesion for dose escalation, and
• At least one measurable lesion for safety expansion, as defined by Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1.
• Eastern Cooperative Oncology Group (ECOG) Performance Status ≤ 1.
• Adequate organ function as defined in the protocol.
• Provision of tumor tissue samples is required for specified parts of the study.