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BG-85738

Phase 1

RAS Mutation | Small molecule | Oncology |BeOne Medicines Ltd.|Last Updated: Aug 4, 2026

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment100

FDA Designations

No designations recorded

Clinical trial landscape

BG-85738 · 1 trial · 3 indications

Phase 1 1
NCT07746141A First-in-Human Study Investigating BG-85738 Alone or in Combination With Other Antitumor Agents in Patients With Advanced or Metastatic Solid Tumors With Rat Sarcoma Virus (RAS) MutationsRAS Mutation
NOT YET_RECRUITING100 Analytics
PHASE1NOT YET_RECRUITING
A First-in-Human Study Investigating BG-85738 Alone or in Combination With Other Antitumor Agents in Patients With Advanced or Metastatic Solid Tumors With Rat Sarcoma Virus (RAS) Mutations
RAS MutationUnlock trial analytics

Study Endpoints

Primary Endpoints

Phase 1a (Part A and Part B): Number of Participants with Adverse Events (AEs) and Serious Adverse Events (SAEs)
From first dose to 30 days after last dose or initiation of a new anticancer therapy, whichever occurs first, up to approximately 24 months

An AE is defined as any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporarily associated with the use of study treatment, whether considered related to study treatment or not. An SAE is any untoward medical occurrence that, at any dose, * Results in death * Is life-threatening * Requires hospitalization or prolongation of existing hospitalization * Results in disability/incapacity * Is congenital anomaly/birth defect * Is considered a significant medical AE by the investigator based on medical judgement

Phase 1a (Parts A and B): Number of Participants with Dose Limiting Toxicity (DLT)
Up to approximately 1 month
Phase 1a (Parts A and B): Maximum Tolerated Dose (MTD) or Maximum Administered Dose (MAD) of BG-85738 as monotherapy or in combination with other antitumor agents
Up to approximately 1 month

MTD is defined as the highest dose level with the target DLT closest but not exceeding 0.33. MAD is defined as the maximum administered dose and it is used when MTD is not reached.

Phase 1a: Recommended Dose for Expansion (RDFE) of BG-85738
Up to approximately 1 month
Part 1b (Parts C and D): Overall Response Rate (ORR)
Up to approximately 24 months

ORR is defined as the percentage of participants who achieve complete response (CR) or partial response (PR). * CR: Disappearance of all target lesions. Any pathological lymph nodes must have reduction in short axis to \< 10 mm. * PR: A ≥ 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.

Phase 1b Dose Expansion: Recommended Phase 2 dose (RP2D) of BG-85738
Up to approximately 24 months

Secondary Endpoints

Phase 1a (Part A and Part B): Terminal Half Life (t1/2) of BG-85738
Up to approximately 2 months
Phase 1a (Part A and Part B): Area Under the Plasma Concentration-Time Curve (AUC) of BG-85738
Up to approximately 2 months
Phase 1a (Part A and Part B): Minimum Observed Serum Concentration (Ctrough) of BG-85738
Up to approximately 2 months
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Phase 1a: Part A- Monotherapy Dose escalation and safetyEXPERIMENTALAscending dose levels of BG-85738 will be evaluated as monotherapy in participants with advanced or metastatic solid tumors with RAS mutations.
Phase 1a: Part B - Combination therapy Dose escalationEXPERIMENTALSequential dose levels of BG-85738, selected based on Part A data, will be evaluated in combination with tislelizumab or in combination with cetuximab.
Phase 1b: Part C- Monotherapy dose expansionEXPERIMENTALParticipants with selected tumor types will receive BG-85738 monotherapy at the RDFE(s) identified in Phase 1a Part A.
Phase 1b: Part D - Combination therapy dose expansionEXPERIMENTALParticipants with select tumor types will receive BG-85738 in combination with tislelizumab or in combination with cetuximab at the RDFE(s) identified in Phase 1a Part B

Interventions

NameTypeDescription
BG-85738DRUGAdministered orally
TislelizumabDRUGAdministered intravenously
CetuximabDRUGAdministered intravenously
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo

Inclusion Criteria: Participants are eligible to be included in the study only if they meet all the following criteria: * Participants must sign the informed consent form and be capable of giving written informed consent, which includes compliance with the requirements and restrictions listed in t...

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Competitive Landscape -Genetic Mutations 6 trials (matched to "RAS Mutation")

Recent Changes (Last 90 Days)

LOWAug 4, 2026NCT07746141NEW_TRIAL: changed
LOWAug 4, 2026NCT07746141NEW_TRIAL: changed

Frequently asked questions about BG-85738

What is BG-85738 used for?

BG-85738 is an investigational small molecule being developed for the treatment of advanced or metastatic solid tumors with rat sarcoma virus (RAS) mutations. It is intended for patients with RAS-mutated cancers, a type of oncology indication. The drug is currently in Phase 1 clinical development.

What does BG-85738 target?

BG-85738 targets cancers driven by rat sarcoma virus (RAS) mutations. It is designed to treat advanced or metastatic solid tumors that harbor these genetic alterations. The drug is being studied as a monotherapy and in combination with other antitumor agents in patients with RAS-mutated tumors.

Who makes BG-85738?

BG-85738 is being developed by BeOne Medicines Ltd., a biopharmaceutical company listed on the stock exchange under the ticker ONC. The company is conducting a first-in-human study of the drug in patients with advanced or metastatic solid tumors with RAS mutations.

What phase is BG-85738 in?

BG-85738 is in Phase 1 clinical development. It is an investigational drug, meaning it has not been approved by regulatory authorities and is still being studied in clinical trials. The ongoing Phase 1 trial is a first-in-human study evaluating the drug's safety and tolerability.

What clinical trials is BG-85738 in?

BG-85738 is being studied in a Phase 1 clinical trial with the identifier NCT07746141. This first-in-human study is investigating BG-85738 alone or in combination with other antitumor agents in patients with advanced or metastatic solid tumors with RAS mutations. The trial is not yet recruiting and aims to enroll 100 participants.