RecruitingHR+/HER2- Breast Cancer
BGB-43395 Plus Letrozole Versus CDK4/6i Plus Letrozole for Patients With Advanced or Metastatic HR+/HER2- Breast Cancer Who Have Not Received Prior Treatment for Advanced or Metastatic Disease
Eligible age
18+ yrs
Accepts
All genders
Locations
21 states
Healthy volunteers
No
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About this study
The purpose of this study is to investigate the efficacy and safety of BGB-43395 in combination with letrozole compared with investigator's choice of cyclin-dependent kinase 4/6 inhibitor (CDK4/6i) in combination with letrozole in patients with advanced or metastatic hormone receptor positive (HR+)/human epidermal growth factor receptor 2 negative (HER2-) breast cancer (BC) who have not received prior systemic treatment for advanced or metastatic disease.
Sponsor: BeOne Medicines
You may qualify if…
- ✓ Participants must be at least 18 years of age or the legal age of consent in the jurisdiction in which the study is taking place at the time of signing the informed consent.
- ✓ Participants with histologically confirmed locally advanced or metastatic HR+ HER2- breast cancer.
- ✓ Participants must have a stable Eastern Cooperative Oncology Group (ECOG) Performance Status of ≤ 1.
- ✓ Adequate organ function.
You may not qualify if…
- ✕ Participants who have received prior systemic treatment in the advanced or metastatic setting.
- ✕ Participants who have received prior treatment with any selective cyclin-dependent kinase 4 (CDK4) or cyclin-dependent kinase 2 (CDK2) targeting agent, or any other investigational anticancer drug in any disease setting, except for prior investigational or approved SERDs in the adjuvant setting, provided that disease recurrence occurred more than 12 months after the last dose of endocrine-based therapy.
- ✕ Participants with active leptomeningeal disease or uncontrolled, untreated brain metastasis.
- ✕ Note: Other protocol-defined inclusion/exclusion criteria may apply.
Where it's recruiting
Source: ClinicalTrials.gov · NCT07492641 · last updated 2026-08-06