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BGB-C354

Phase 1

Advanced Solid Tumor | Small molecule | Oncology |BeOne Medicines Ltd.|Trials Updated: Jun 8, 2026

BGB-C354 development status

Highest phase Phase 1
Registered trials 1 across 1 sponsor since May 2024

BGB-C354 target and mechanism

Molecular targetB7H3
Target classAdc
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials1
Total Enrollment63

FDA Designations

No designations recorded

BGB-C354 clinical trials

BGB-C354 · 1 trial · 1 indication

Phase 1 1
NCT06422520A First-in-Human Study of BGB-C354 Alone and in Combination With Tislelizumab in Participants With Advanced Solid TumorsAdvanced Solid Tumor
COMPLETED63 Analytics
PHASE1COMPLETED
A First-in-Human Study of BGB-C354 Alone and in Combination With Tislelizumab in Participants With Advanced Solid Tumors
Advanced Solid TumorUnlock trial analytics

Study Endpoints

Primary Endpoints

Phase 1a: Number of Participants with Adverse Events (AEs) and Serious Adverse Events (SAEs)
Approximately 24 months

Number of participants with AEs and SAEs characterized by type, frequency, severity (as graded by the National Cancer Institute- Common Terminology Criteria for Adverse Events Version 5.0 \[NCI-CTCAE v 5.0\]), timing, seriousness, and relationship to study drug(s); physical examinations; electrocardiograms (ECGs); and laboratory assessments as needed; and adverse events meeting protocol-defined dose-limiting toxicity (DLT) criteria

Phase 1a: Maximum Tolerated Dose (MTD) or Maximum Administered Dose (MAD) of BGB-C354
Approximately 1 month

Defined as the highest dose evaluated for which the estimated toxicity rate is closest to the target toxicity rate of 30% or the highest dose administered, respectively

Phase 1a: Recommended Dose for Expansion (RDFE) of BGB-C354
Approximately 24 months

The potential RDFE(s) of BGB-C354 will be determined based on the MTD or MAD, taking into consideration the long-term tolerability, pharmacokinetics (PK), preliminary antitumor activity, and any other relevant data, as available

Phase 1b: Overall Response Rate (ORR)
Approximately 24 months

ORR is defined as the percentage of participants with best overall response (BOR) of complete response (CR) or partial response (PR) assessed by the investigator using Response Evaluations Criteria in Solid Tumors Version 1.1 (RECIST v1.1).

Phase 1b: Recommended Phase 2 dose (RP2D) of BGB-C354 alone and in combination with tislelizumab
Approximately 24 months

The RP2D of BGB-C354 will be determined based on safety, PK, pharmacodynamics, preliminary antitumor activity, and other relevant data, as available.

Secondary Endpoints

Phase 1a: ORR
Approximately 24 months
Duration of Response (DOR)
Approximately 24 months
Disease Control Rate (DCR)
Approximately 24 months
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Phase 1a: Part A (Monotherapy Dose Escalation)EXPERIMENTALBGB-C354 monotherapy doses at sequentially increasing levels.
Phase 1a: Part B (Safety Expansion)EXPERIMENTALParticipants will enroll at safe dose levels recommended by the Safety Monitoring Committee (SMC) for further evaluation.
Phase 1b: Part C (Monotherapy Expansion)EXPERIMENTALBGB-C354 will be administered at the recommended dose for expansion (RDFE).
Phase 1b: Part D (Combination Therapy Expansion)EXPERIMENTALBGB-C354 and tislelizumab will be adminsitered at doses determined by the SMC.

Interventions

NameTypeDescription
BGB-C354DRUGAdministered by intravenous infusion
TislelizumabDRUGAdministered by intravenous infusion
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites14

Inclusion Criteria: 1. Able to provide a signed and dated written informed consent prior to any study-specific procedures, sampling, or data collection. 2. Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1. 3. Participants with histologically or cytologically confirmed advanced...

Countries:United StatesAustraliaChina
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Competitive Landscape -Other Solid Tumors 10 trials (matched to "Advanced Solid Tumor")

Frequently asked questions about BGB-C354

What is BGB-C354 used for?

BGB-C354 is an investigational therapy being studied for the treatment of advanced solid tumors. It is being developed by BeOne Medicines Ltd. and has been evaluated in a Phase 1 clinical trial. It is not approved for any indication and remains in clinical development.

What does BGB-C354 target?

BGB-C354 targets B7H3, a protein expressed on certain tumor cells. It is an antibody-drug conjugate (ADC) designed to deliver a therapeutic payload to B7H3-expressing cells. This targeted approach aims to focus treatment on tumor tissue while limiting effects on normal cells.

Who is developing BGB-C354?

BGB-C354 is being developed by BeOne Medicines Ltd., which trades under the ticker ONC. The company is evaluating the agent in a first-in-human study for advanced solid tumors, both as a single agent and in combination with tislelizumab.

What phase is BGB-C354 in?

BGB-C354 is in Phase 1 clinical development. A first-in-human study has been completed, and the drug remains investigational. It has not been approved by the FDA or any other regulatory agency for any indication.

What clinical trials is BGB-C354 in?

BGB-C354 has been studied in a single Phase 1 trial, NCT06422520, titled a first-in-human study of BGB-C354 alone and in combination with tislelizumab in participants with advanced solid tumors. The trial enrolled 63 participants across the United States, Australia, and China and is now completed.