An Investigational Study of BG-75202 Alone and in Combination With Other Therapeutic Agents in Adults With Advanced Solid Tumors

NCT ID: NCT07222267

Last Updated: 2025-12-23

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

RECRUITING

Clinical Phase

PHASE1

Total Enrollment

86 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-12-11

Study Completion Date

2036-07-31

Brief Summary

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The purpose of this study is to evaluate the safety, tolerability, pharmacokinetics (PK), pharmacodynamics, and preliminary antitumor activity of BG-75202 (KAT6A/B inhibitor) alone and in combination with other therapies in participants with breast cancer and other advanced solid tumors.

Detailed Description

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Conditions

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Breast Cancer Advanced Solid Tumor

Keywords

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KAT6 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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Part 1A: Dose Escalation and Safety Expansion, BG-75202 Monotherapy

Sequential cohorts of increasing dose levels of BG-75202 will be evaluated as monotherapy.

Group Type EXPERIMENTAL

BG-75202

Intervention Type DRUG

Administered orally.

Part 1B: Dose Escalation and Safety Expansion, BG-75202 + Estrogen Receptor Antagonist

Sequential cohorts of increasing dose levels of BG-75202 will be evaluated in combination with an estrogen receptor antagonist.

Group Type EXPERIMENTAL

BG-75202

Intervention Type DRUG

Administered orally.

Estrogen Receptor Antagonist

Intervention Type DRUG

Administered by intramuscular injection.

Part 2A: Dose Optimization, BG-75202 + Estrogen Receptor Antagonist

Participants will receive BG-75202 in combination with an estrogen receptor antagonist.

Group Type EXPERIMENTAL

BG-75202

Intervention Type DRUG

Administered orally.

Estrogen Receptor Antagonist

Intervention Type DRUG

Administered by intramuscular injection.

Part 2B: Safety Run-In, BG-75202 + CDK4 inhibitor + Aromatase Inhibitor

Participants will receive BG-75202 in combination with a cyclin-dependent kinase 4 (CDK4) inhibitor and an aromatase inhibitor.

Group Type EXPERIMENTAL

BG-75202

Intervention Type DRUG

Administered orally.

CDK4 Inhibitor

Intervention Type DRUG

Administered orally.

Aromatase Inhibitor

Intervention Type DRUG

Administered orally.

Part 2C: Dose Expansion, BG-75202 + CDK4 inhibitor + Aromatase Inhibitor

Participants will receive BG-75202 in combination with a CDK4 inhibitor and an aromatase inhibitor.

Group Type EXPERIMENTAL

BG-75202

Intervention Type DRUG

Administered orally.

CDK4 Inhibitor

Intervention Type DRUG

Administered orally.

Aromatase Inhibitor

Intervention Type DRUG

Administered orally.

Interventions

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BG-75202

Administered orally.

Intervention Type DRUG

CDK4 Inhibitor

Administered orally.

Intervention Type DRUG

Estrogen Receptor Antagonist

Administered by intramuscular injection.

Intervention Type DRUG

Aromatase Inhibitor

Administered orally.

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

* Part 1A: Participants with histologically or cytologically confirmed advanced, metastatic breast cancer and other solid tumors who have exhausted, are intolerant of all available standard of care therapies, and/or without available standard of care therapies.
* Part 1B and Part 2A: Participants with advanced breast cancer with 1 to 3 prior lines of systemic therapy in the metastatic setting. Prior lines in the advanced/ metastatic setting may not exceed 2 lines of chemotherapy (inclusive of antibody-drug conjugate with cytotoxic payload).
* Parts 2B and 2C: Participants with advanced breast cancer enrolled in regions where cyclin-dependent kinase 4/6 (CDK4/6) inhibitors are not approved and/or not available as the first-line treatment and who are CDK4/6 inhibitor treatment naïve and did not receive any previous systemic treatment for advanced disease.
* Participants with breast cancer must have histologically or cytologically confirmed advanced breast cancer at the time of most recent testing, based on American Society of Clinical Oncology (ASCO)/College of American Pathologists (CAP) guidelines.
* Female participants with metastatic breast cancer must be postmenopausal or receiving ovarian function suppression treatment.
* Measurable disease as assessed by Response Evaluation Criteria in Solid Tumors (RECIST) v 1.1.
* Stable Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1.
* Adequate organ function.

Exclusion Criteria

* Prior exposure to KAT6A/B or KAT7 inhibitors/degraders.
* Patients with active leptomeningeal disease or uncontrolled, untreated brain metastasis.
* Participants with any malignancy ≤ 3 years before screening for the study except for the specific cancer under investigation in this study and any locally recurring cancer that has been treated curatively which in the opinion of the investigator is unlikely to require intervention during the study.
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 Oncology Austin

Austin, Texas, United States

Site Status RECRUITING

Cancer Research South Australia

Adelaide, South Australia, Australia

Site Status RECRUITING

Countries

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United States Australia

Central Contacts

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Study Director

Role: CONTACT

Phone: 877-828-5568

Email: [email protected]

Other Identifiers

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2025-523553-34-00

Identifier Type: CTIS

Identifier Source: secondary_id

BG-75202-101

Identifier Type: -

Identifier Source: org_study_id