A Study to Learn About the Study Medicine Called PF-07248144 in Combination With Fulvestrant in P… (NCT07062965) | Clinical Trial Compass
RecruitingPhase 3
A Study to Learn About the Study Medicine Called PF-07248144 in Combination With Fulvestrant in People With HR-positive, HER2-negative Advanced or Metastatic Breast Cancer Who Progressed After a Prior Line of Treatment.
United States, Australia, Belgium400 participantsStarted 2025-08-05
Plain-language summary
The purpose of this study is to learn about the safety and effects of the study medicine PF-07248144 when given along with fulvestrant for the possible treatment of HR-positive, HER2-negative advanced or metastatic breast cancer.
HR-positive breast cancer cells have proteins on their surface called receptors that bind to hormones like estrogen and progesterone (female sex hormones). These hormones can promote the growth of cancer cells.
HER2-negative describes cells that have a small amount or none of a protein called HER2 on their surface. In normal cells, HER2 helps control cell growth. Cancer cells that are HER2-negative may grow more slowly and are less likely to recur (come back) or spread to other parts of the body than cancer cells that have a large amount of HER2 on their surface.
Advanced cancer is a term that is often used to describe cancer that is unlikely to be cured.
Metastatic cancer is the type where the cancer cells spread from one part of the body to another.
This study is seeking for participants whose breast cancer has gotten worsen after receiving cyclin dependent kinase (CDK) 4/6 inhibitor-based therapy.
Half of participants in this study will receive their usual study treatment, everolimus with endocrine therapy (either exemestane or fulvestrant) for HR-positive/HER2-negative advanced or metastatic breast cancer (A/mBC). The study doctor will discuss which hormone therapy is right for the participant before treatment begins.
PF-07248144 is a tablet that will be taken by mouth at home every day in a 28-day cycle. Fulvestrant will be given as two injections (one injection in the buttock) at visits to the study clinic. Everolimus and exemestane are also tablets and will be taken by mouth at home every day in a 28-day cycle.
The study will compare the experiences of people receiving PF-07248144 in combination with fulvestrant to those of the people who do not. This will help see if PF-07248144 in combination with fulvestrant is safe and effective.
Who can participate
Age range
18 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Confirmed diagnosis of HR-positive HER2-negative breast cancer with evidence of locally advanced or metastatic disease, which is not amenable to surgical resection or radiation therapy with curative intent.
* Prior CDK4/6 inhibitor therapy in combination with endocrine therapy in advance metastatic setting or in adjuvant setting with documented progression during or within 12 months after the last dose of CDK4/6i.
* Participants are eligible if they previously received CDK4/6i or ET as a monotherapy, or in combination for rechallenge therapy in the advance or metastatic setting; have received prior therapy targeting estrogen receptor 1 (ESR1) or breast cancer gene (BRCA)1/2.
* Measurable disease evaluable per Response Evaluation Criterion in Solid Tumors (RECIST) v.1.1 or non-measurable bone-only disease
* Eastern Cooperative Oncology Group (ECOG) Performance Status (PS) 0 or 1.
Exclusion Criteria:
* Documented detectable PIK3CA/AKT1/PTEN alterations in tissue
* Received greater than two prior lines of systemic therapy in the advance or metastatic setting
* Had received any prior chemotherapy, including antibody drug conjugates (ADCs), in advance or metastatic setting. Participants who have previously received chemotherapy in the (neo)adjuvant setting are not excluded from the study.
* Any medical or psychiatric condition that may increase the risk of study participation or make the participant inappropriate for the study.
* Renal impairment, hepatic …
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1This is a Phase 3 trial combining PF-07248144 with fulvestrant — since Phase 3 trials are designed to confirm effectiveness but can still carry unknown risks, what do we know so far about the safety profile of PF-07248144, and how does that weigh against my other options?
2The trial is specifically for HR-positive, HER2-negative breast cancer that has already progressed after a prior treatment — based on my treatment history, do I fit the kind of patient this study is designed for, and would it make sense to consider it now versus trying another standard therapy first?
3The main thing this study is measuring is how long patients go without the disease getting worse (progression-free survival) — is that the most important outcome for my situation, or should I be prioritizing something else like overall survival or quality of life?
4Fulvestrant is already an approved treatment for my type of breast cancer — what is the potential advantage of adding PF-07248144 to it, and is there any risk that being in this trial could delay or limit access to other proven treatments if things don't go as hoped?
5Since this trial is actively recruiting, what would participation actually look like for me day-to-day — how often would I need to come in for visits, and are there any demands in terms of tests or travel that I should think carefully about before deciding?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Progression Free Survival (PFS) as determined by blinded independent central review (BICR) per Response Evaluation Criteria in Solid Tumors (RECIST) v1.1
Timeframe: From the date of randomization until disease progression or death due to any cause (up to approximately 2 years)