NCT07368998 · Hoffmann-La Roche
To Study the Effect of Inavolisib in Combination With Fulvestrant in Participants With Breast Cancer
(optINAVO)
What this study is about
The purpose of this study is to evaluate the effectiveness 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.
View original scientific description
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.
Interventions
DRUG
Inavolisib
Participants will receive Inavolisib as per the schedule given in the protocol.
DRUG
Fulvestrant
Participants will receive Fulvestrant as per the schedule given in the protocol.
Primary outcome measures
Percentage of Participants With Objective Response Rate (ORR)
Time frame: Up to approximately 2 years
Percentage of Participants With Treatment Emergent Adverse Events (TEAEs)
Time frame: Up to approximately 2 years
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- 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
- Confirmation of biomarker eligibility: presence of \>= 1 study-eligible PIK3CA mutation
- Life expectancy of \> 6 months
- Ability, in the investigator's judgment, and willingness to comply with all study -related procedures, including completion of patient-reported outcomes
Exclusion criteria
- 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
- Requirement for daily supplemental oxygen
- Symptomatic active lung disease, including pneumonitis
Where
- Los Angeles, California
- East Brunswick, New Jersey
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jul 7, 2026 · Source of record for eligibility and locations