About this trial
The purpose of this study is to evaluate the efficacy and safety of inavolisib in combination with fulvestrant compared with inavolisib in combination with fulvestrant in participants with PIK3CA-mutated, HR-positive, HER2-negative locally advanced or metastatic breast cancer (LA/mBC) in the post-cyclin-dependent kinase inhibitor (CDKi) setting.
Eligibility criteria
Qualifiers
Documented ER +/ HER2- tumor according to American Society of Clinical Oncology/College of American Pathologists (ASCO/CAP) guidelines
Disease progression after or during treatment with a combination of CDK4/6i and endocrine therapy: <= 1 prior lines of systemic therapy in the locally advanced (recurrent or progressed) or metastatic setting
Measurable or evaluable disease per Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST v1.1)
Participants for whom endocrine-based therapy is recommended and treatment with cytotoxic chemotherapy is not indicated at time of entry into the study, as per national or local treatment guidelines
Disqualifiers
Metaplastic breast cancer
Prior treatment with chemotherapy in the recurrent locally advanced/metastatic setting
Type 2 diabetes requiring ongoing systemic treatment at the time of study entry; or any history of Type 1 diabetes
Prior treatment with PI3K/Akt/mTOR inhibitors in the recurrent locally advanced/metastatic setting
Trial design
Treatments tested in this trial
- Inavolisib
- Fulvestrant