A Study of BG-75098 Alone and in Combination With Other Agents in Adults With Advanced Solid Tumors

NCT ID: NCT07226349

Last Updated: 2025-11-10

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

NOT_YET_RECRUITING

Clinical Phase

PHASE1

Total Enrollment

105 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-12-02

Study Completion Date

2029-03-15

Brief Summary

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The purpose of this study is to evaluate safety, tolerability, pharmacokinetics (PK), pharmacodynamics, and preliminary antitumor activity of BG-75098 alone and in combination with BGB-43395 and fulvestrant in participants with advanced solid tumors.

Detailed Description

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This study will be conducted in 2 phases: Phase 1a Dose Escalation and Phase 1b Dose Expansion.

Conditions

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Advanced Solid Tumor

Keywords

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Cyclin-Dependent Kinase 2- Targeted Protein Degrader CDK2 CDK4 CDK4 inhibitor

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

SEQUENTIAL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Phase 1a, Part A: Dose Escalation, BG-75098 Monotherapy

Sequential cohorts of increasing dose levels of BG-75098 will be evaluated as monotherapy.

Group Type EXPERIMENTAL

BG-75098

Intervention Type DRUG

Administered orally.

Phase 1a, Part B: Dose Escalation, BG-75098 Combination

Sequential cohorts of increasing dose levels of BG-75098 will be evaluated in combination with BGB-43395 and fulvestrant.

Group Type EXPERIMENTAL

BG-75098

Intervention Type DRUG

Administered orally.

BGB-43395

Intervention Type DRUG

Administered orally.

Fulvestrant

Intervention Type DRUG

Administered by intramuscular injection.

Phase 1b, Cohort 1: Dose Expansion, BG-75098 Combination

Participants will receive BG-75098 at the recommended dose level from Phase 1a in combination with BGB-43395 and fulvestrant.

Group Type EXPERIMENTAL

BG-75098

Intervention Type DRUG

Administered orally.

BGB-43395

Intervention Type DRUG

Administered orally.

Fulvestrant

Intervention Type DRUG

Administered by intramuscular injection.

Phase 1b, Cohort 2: Dose Expansion, BG-75098 Monotherapy

Participants will receive BG-75098 as monotherapy at the recommended dose level from Phase 1a.

Group Type EXPERIMENTAL

BG-75098

Intervention Type DRUG

Administered orally.

Interventions

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BG-75098

Administered orally.

Intervention Type DRUG

BGB-43395

Administered orally.

Intervention Type DRUG

Fulvestrant

Administered by intramuscular injection.

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

* Participants must have measurable disease as assessed by RECIST v1.1.
* Participants must have a stable Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1.
* Participants must have adequate organ function.
* Dose Escalation Part A: Participants with histologically or cytologically confirmed advanced, metastatic, or unresectable solid tumors potentially associated with cyclin-dependent kinase 2 (CDK2) dependency. Participants should have received prior treatment with available standard-of-care (SOC) systemic therapies for advanced/metastatic disease, or for whom standard therapy is not available or not tolerated.
* Dose Escalation Part B: Patients with histologically or cytologically confirmed advanced, metastatic, or unresectable solid tumors who have received ≥ 1 prior line of systemic therapy in the metastatic setting.
* Dose Expansion Cohort 1: Participants with histologically or cytologically confirmed advanced, metastatic, or unresectable CDK4/6 inhibitor-progressed solid tumors.
* Dose Expansion Cohort 2: Participants with advanced solid tumors. Participants with primary platinum refractory disease are not eligible. Participants should have received ≥ 1 line of platinum-containing chemotherapy and ≤ 4 prior therapeutic regimens in the advanced/metastatic setting.

Exclusion Criteria

* For all cohorts: Prior therapy selectively targeting CDK2 inhibition or degradation.
* For combination cohorts: Prior therapy selectively targeting CDK4. Prior CDK4/6 inhibitor standard of care therapy is permitted and required in local regions where it is approved and available.
* Participants with active leptomeningeal disease or uncontrolled, untreated brain metastasis.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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BeOne Medicines

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Study Director

Role: STUDY_DIRECTOR

BeOne Medicines

Locations

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Next Houston

Houston, Texas, United States

Site Status

Countries

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United States

Central Contacts

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Study Director

Role: CONTACT

Phone: 8778285568

Email: [email protected]

Other Identifiers

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2025-523165-19-00

Identifier Type: CTIS

Identifier Source: secondary_id

BG-75098-101

Identifier Type: -

Identifier Source: org_study_id