Purpose

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.

Conditions

Eligibility

Eligible Ages
Over 18 Years
Eligible Sex
All
Accepts Healthy Volunteers
No

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. Note: Other protocol defined Inclusion/Exclusion criteria may apply.

Study Design

Phase
Phase 1
Study Type
Interventional
Allocation
Non-Randomized
Intervention Model
Sequential Assignment
Primary Purpose
Treatment
Masking
None (Open Label)

Arm Groups

ArmDescriptionAssigned Intervention
Experimental
Part 1A: Dose Escalation and Safety Expansion, BG-75202 Monotherapy
Sequential cohorts of increasing dose levels of BG-75202 will be evaluated as monotherapy.
  • Drug: BG-75202
    Administered orally.
Experimental
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.
  • Drug: BG-75202
    Administered orally.
  • Drug: Estrogen Receptor Antagonist
    Administered by intramuscular injection.
Experimental
Part 2A: Dose Optimization, BG-75202 + Estrogen Receptor Antagonist
Participants will receive BG-75202 in combination with an estrogen receptor antagonist.
  • Drug: BG-75202
    Administered orally.
  • Drug: Estrogen Receptor Antagonist
    Administered by intramuscular injection.
Experimental
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.
  • Drug: BG-75202
    Administered orally.
  • Drug: CDK4 Inhibitor
    Administered orally.
  • Drug: Aromatase Inhibitor
    Administered orally.
Experimental
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.
  • Drug: BG-75202
    Administered orally.
  • Drug: CDK4 Inhibitor
    Administered orally.
  • Drug: Aromatase Inhibitor
    Administered orally.

Recruiting Locations

University of Alabama At Birmingham Hospital
Birmingham, Alabama 35294-0004

More Details

Status
Recruiting
Sponsor
BeOne Medicines

Study Contact

Study Director
877-828-5568
clinicaltrials@beonemed.com

Notice

Study information shown on this site is derived from ClinicalTrials.gov (a public registry operated by the National Institutes of Health). The listing of studies provided is not certain to be all studies for which you might be eligible. Furthermore, study eligibility requirements can be difficult to understand and may change over time, so it is wise to speak with your medical care provider and individual research study teams when making decisions related to participation.