PF-07248144 with Fulvestrant for Advanced Breast Cancer
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.
Recruiting
Phase 3Interventional Study
Breast Cancer
No Placebo Group
Every participant receives an active treatment — no one gets a placebo.
Pivotal Trial
This treatment is in the last trial phase before FDA approval.
Prior Safety Data
This treatment has already been tested in at least one earlier human trial.
Ready to participate?
Review the details below, then apply to join this clinical trial.
At a Glance
Age
18 and older
Sex
Any
Trial phase
Phase 3
Study type
Interventional
Purpose
Treatment
Participants needed
400 (estimated)
Sponsor
Pfizer · Industry
Who this trial is looking for
This trial is looking for people with HR-positive, HER2-negative advanced breast cancer that has worsened after previous treatment. Participants will receive the study medicine PF-07248144 along with their normal treatment options to see how well they work together.
Are You a Good Fit for This Trial?
You may be able to join if
I have HR-positive, HER2-negative breast cancer.
I have advanced or metastatic breast cancer that cannot be cured with surgery or radiation.
I have been on prior CDK4/6 inhibitor therapy with endocrine therapy.
I have measurable disease or non-measurable bone-only disease.
I have an Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1.
You may not be able to join if
I have detectable PIK3CA/AKT1/PTEN alterations in my tissue.
I have received more than two lines of systemic therapy.
I have had any prior chemotherapy for advanced or metastatic cancer.
I have any medical or psychiatric condition that may increase risks.
I have kidney problems, liver problems, or blood disorders.
Summarized in plain language from this trial's official eligibility criteria.
The full criteria are further down this page — only the research team can
confirm whether you qualify.
Think this trial could be right for you?
Answer a few quick questions to see if you may meet the eligibility requirements.
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 hormone…
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.
Trial Locations
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Status
Eligibility Criteria
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…
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 dysfunction, or hematologic abnormalities.
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