NCT06756932 BGB-21447 (Bcl-2 Inhibitor) Combinations for Adults With Hormone-Receptor Positive (HR+)/Human Epidermal Growth Factor Receptor 2 Negative (HER2-) Metastatic Breast Cancer
| NCT ID | NCT06756932 |
| Status | Recruiting |
| Phase | Phase 1 |
| Sponsor | BeOne Medicines |
| Condition | Hormone-receptor-positive Breast Cancer |
| Study Type | INTERVENTIONAL |
| Enrollment | 120 participants |
| Start Date | 2025-02-04 |
| Primary Completion | 2027-07-30 |
Eligibility & Interventions
Eligibility Fast-Check
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What to Expect as a Participant
You will actively receive the study intervention — which may be a drug, biologic, device, or procedure.
Phase 1 is the earliest stage of human testing — safety and dosage are the primary focus. Visits are frequent and medical supervision is intensive. You will be among the first people to receive this treatment.
This trial targets 120 participants in total. It began in 2025-02-04 with a primary completion date of 2027-07-30.
⚠ This information is for research awareness only. Always consult your physician before joining any clinical trial. Participation is voluntary and you may withdraw at any time.
Brief Summary
This is a dose escalation and dose expansion study to assess the safety and tolerability of BGB-21447 (a B-cell leukemia/lymphoma 2 inhibitor, Bcl-2i) in combination with fulvestrant, with or without BGB-43395 (cyclin-dependent kinase 4 inhibitor, CDK4i), in adults with HR+/HER2- metastatic breast cancer.
Eligibility Criteria
Inclusion Criteria: * Histologically or cytologically confirmed HR+/HER2- metastatic breast cancer. Part 1A and 1B: Participants must have received ≥ 1 prior line(s) of treatment for advanced/metastatic disease, including prior endocrine therapy and CDK4/6 inhibitor in either the adjuvant or advanced/metastatic setting. Part 2: Participants must have received 1-3 prior line(s) of treatment for advanced/metastatic disease, including prior endocrine therapy and CDK4/6 inhibitor in either the adjuvant or advanced/metastatic setting. * Female participants will be required (either continue ongoing or initiate as soon as feasible) to have ovarian function suppression using gonadotropin-releasing hormone (GnRH) agonists (such as goserelin) or be postmenopausal. * Male participants may be required to use GnRH agonists when being treated with fulvestrant at the discretion of the investigator. * Participants must have a stable Eastern Cooperative Oncology Group (ECOG) Performance Status of ≤ 1. * Adequate organ function. * Female participants of childbearing potential and nonsterile male participants with female partners of childbearing potential must be willing to use a highly effective method of birth control for the duration of the study and for 7 days after the last dose of BGB-21447, 6 months after the last dose of BGB-43395, and 2 years after the last dose of fulvestrant. * Food effect substudy only: Participants who are able and willing to fast overnight (≥ 10 hours) and consume a high-fat meal. Exclusion Criteria: * Prior Bcl-2 inhibitor exposure. For triplet combination cohorts only: Prior therapy selectively targeting CDK4. * Known leptomeningeal disease or uncontrolled, untreated brain metastases. * Any malignancy ≤ 3 years before the first dose of study treatment(s) except for the specific cancer under investigation in this study and any locally recurring cancer that has been treated with curative intent (eg, treated papillary thyroid carcinoma, resected basal or squamous cell skin cancer, superficial bladder cancer, or carcinoma in situ of the cervix or breast). * For Part 1B: Uncontrolled diabetes. * History of hepatitis B or active Hepatitis C infection * China Only: Untreated chronic hepatitis B or chronic hepatitis B virus (HBV) carriers with HBV DNA \> 500 IU/ml (or \> 2500 copies/ml) at screening. Note: Other protocol defined Inclusion/Exclusion criteria may apply.
Contact & Investigator
Study Director
STUDY DIRECTOR
BeOne Medicines
Frequently Asked Questions
Who can join the NCT06756932 clinical trial?
This trial is open to participants of all sexes, aged 18 Years or older, studying Hormone-receptor-positive Breast Cancer. Full inclusion and exclusion criteria are listed in the Eligibility Criteria section. Always confirm your eligibility with the research team before applying.
What phase is the NCT06756932 trial and what does that mean for participants?
Phase 1 trials are the first stage of human testing. The primary goal is to assess safety and determine appropriate dosage levels. Participants are closely monitored. These trials typically involve a small number of volunteers.
Is NCT06756932 currently recruiting?
Yes, NCT06756932 is actively recruiting participants. Contact the research team at clinicaltrials@beonemed.com for enrollment information.
Where is the NCT06756932 trial being conducted?
This trial is being conducted at Iowa City, United States, Houston, United States, Seattle, United States, Darlinghurst, Australia and 10 additional locations.
Who is sponsoring the NCT06756932 clinical trial?
NCT06756932 is sponsored by BeOne Medicines. The principal investigator is Study Director at BeOne Medicines. The trial plans to enroll 120 participants.
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