Working… Menu

Pembrolizumab, Letrozole, and Palbociclib in Treating Postmenopausal Patients With Newly Diagnosed Metastatic Stage IV Estrogen Receptor Positive Breast Cancer

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT02778685
Recruitment Status : Recruiting
First Posted : May 20, 2016
Last Update Posted : February 12, 2021
National Cancer Institute (NCI)
Information provided by (Responsible Party):
City of Hope Medical Center

Brief Summary:
This phase II trial studies how well pembrolizumab works when given together with letrozole and palbociclib in treating postmenopausal patients with newly diagnosed stage IV estrogen receptor positive breast cancer that has spread to other parts of the body (metastatic). Immunotherapy with monoclonal antibodies, such as pembrolizumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Estrogen can cause the growth of breast cancer cells. Antihormone therapy, such as letrozole, may lessen the amount of estrogen made by the body. Palbociclib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Giving pembrolizumab, letrozole, and palbociclib may be an effective treatment for patients with stage IV estrogen receptor positive breast cancer.

Condition or disease Intervention/treatment Phase
Estrogen Receptor Positive HER2/Neu Negative Postmenopausal Metastatic Breast Carcinoma Stage IV Breast Cancer Other: Laboratory Biomarker Analysis Drug: Letrozole Drug: Palbociclib Biological: Pembrolizumab Phase 2

Show Show detailed description

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 22 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Phase II Study of the Combination of Pembrolizumab, Letrozole and Palbociclib in Postmenopausal Patients With Newly Diagnosed Metastatic Estrogen Receptor Positive Breast Cancer
Actual Study Start Date : February 14, 2017
Estimated Primary Completion Date : December 31, 2021
Estimated Study Completion Date : December 31, 2021

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Breast Cancer

Arm Intervention/treatment
Experimental: Treatment (letrozole, palbociclib, pembrolizumab)
Patients receive letrozole PO QD on days 1-28 and palbociclib PO QD for 3 weeks. Cycles with letrozole and palbociclib repeat every 28 days in the absence of disease progression or unacceptable toxicity. Patients also receive pembrolizumab IV over 30 minutes on day 1. Cycles with pembrolizumab repeat every 21 days in the absence of disease progression or unacceptable toxicity.
Other: Laboratory Biomarker Analysis
Correlative studies

Drug: Letrozole
Given PO
Other Names:
  • CGS 20267
  • Femara

Drug: Palbociclib
Given PO
Other Names:
  • Ibrance
  • PD-0332991
  • PD-332991

Biological: Pembrolizumab
Given IV
Other Names:
  • Keytruda
  • Lambrolizumab
  • MK-3475
  • SCH 900475

Primary Outcome Measures :
  1. Response rate (CR or PR) assessed using RECIST version 1.1 [ Time Frame: Up to 24 months ]

Secondary Outcome Measures :
  1. Complete response rate assessed using RECIST version 1.1 [ Time Frame: Up to 24 months ]
  2. Duration of Response assessed using RECIST version 1.1 [ Time Frame: Up to 24 months ]
  3. Incidence of adverse events assessed by NCI CTCAE, version 4 [ Time Frame: Up to 24 months ]
    Adverse events will be analyzed including but not limited to all AEs, SAEs, fatal AEs, and laboratory changes. Immune-related adverse events will also be collected.

  4. Overall Survival assessed using RECIST version 1.1 [ Time Frame: Up to 24 months ]
    Generated using Kaplan-Meier estimates.

  5. Progression Free Survival assessed using RECIST version 1.1 [ Time Frame: Up to 24 months ]
    Generated using Kaplan-Meier estimates.

  6. Time to treatment failure assessed using irRECIST [ Time Frame: Up to 24 months ]
    Generated using Kaplan-Meier estimates

Other Outcome Measures:
  1. Clinical benefit assessed using irRECIST [ Time Frame: Up to 24 months ]
  2. Tumor response assessed using irRECIST [ Time Frame: Up to 24 months ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Willing and able to provide written informed consent/assent for the trial
  • Willing and able to comply with all aspects of the treatment protocol
  • Postmenopausal women defined by at least one of the following criteria:

    • Prior bilateral oophorectomy OR amenorrheic for >= 12 months (if =< 55 years of age and prior to chemotherapy, or on medical ovarian ablative therapy, OR;
    • Previous hysterectomy with one or both ovaries left in place (previous hysterectomy in which documentation of bilateral oophorectomy is unavailable AND FSH values consistent with the institutional normal values for the post-menopausal state; FSH levels must be obtained within 28 days prior to registration)
  • Presence of measurable disease meeting the following criteria: at least 1 lesion of > 10 mm in long axis diameter for non-lymph nodes or > 15 mm in short axis diameter for lymph nodes that is serially measurable according to RECIST version 1.1 using computerized tomography, magnetic resonance imaging, or panoramic and close-up color photography
  • *Newly diagnosed (cohort 2) stage IV metastatic ER+HER2- breast cancer histologically proven per current American Society of Clinical Oncology (ASCO)/College of American Pathologists (CAP) guidelines; allow up to 30 days prior use of CDK4/6 inhibitors and up to 60 days of letrozole for treatment of metastatic ER+ breast cancer
  • Life expectancy of >= 3 months
  • Eastern Cooperative Oncology Group (ECOG) performance status (PS) of 0-2
  • Willing to provide tissue from a newly obtained core or excisional biopsy of a tumor lesion; newly-obtained is defined as a specimen obtained up-to 6 weeks (42 days) prior to initiation of treatment on day 1; subjects for whom newly-obtained samples cannot be provided (e.g. inaccessible or subject safety concern) may submit an archived specimen only upon agreement from the study principal investigator (PI)
  • Absolute neutrophil count (ANC) >= 1,000 /mcL
  • Platelets >= 100,000 /mcL
  • Hemoglobin >= 9 g/dL or >= 5.6 mmol/L without transfusion or erythropoietin (EPO) dependency (within 7 days of assessment)
  • Serum creatinine =< 1.5 X upper limit of normal (ULN) OR measured or calculated creatinine clearance (glomerular filtration rate [GFR] can also be used in place of creatinine or creatinine clearance [CrCl]) >= 60 mL/min for subject with creatinine levels > 1.5 x institutional ULN
  • Serum total bilirubin =< 1.5 X ULN OR direct bilirubin =< ULN for subjects with total bilirubin levels > 1.5 ULN
  • Aspartate aminotransferase (AST) (serum glutamic-oxaloacetic transaminase [SGOT]) and alanine aminotransferase (serum glutamate pyruvate transaminase [SGPT]) =< 2.5 X ULN OR =< 5 X ULN for subjects with liver metastases
  • Albumin >= 2.5 mg/dL
  • International normalized ratio (INR) or prothrombin time (PT) =< 1.5 X ULN unless subject is receiving anticoagulant therapy as long as PT or partial thromboplastin time (PTT) is within therapeutic range of intended use of anticoagulants
  • Activated partial thromboplastin time (aPTT) =< 1.5 X ULN unless subject is receiving anticoagulant therapy as along as PT or PTT is within therapeutic range of intended use of anticoagulants
  • Female subjects of childbearing potential should have a negative urine or serum pregnancy within 72 hours prior to receiving the first dose of study medication; if the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required
  • Female subjects of childbearing potential should be willing to use two methods of birth control or be surgically sterile, or abstain from heterosexual activity for the course of the study through 120 days after the last dose of study medication; subjects of childbearing potential are those who have not been surgically sterilized or have not been free from menses for > 1 year
  • *Cohort 1 (accrual to 6 patients) is for patients who had ongoing stable disease (SD) on letrozole + palbociclib, enrolled on prior version of eligibility criteria to receive pembrolizumab after obtaining stable disease on letrozole + palbociclib; these patients must have been on treatment with letrozole and palbociclib for 6 months with SD per RECIST 1.1; received up to 3 lines of previous therapy including endocrine and/or chemotherapy in advanced setting prior to initiation of letrozole and palbociclib; no grade 3 toxicities except alopecia

Exclusion Criteria:

  • Patients currently participating and receiving study therapy or who have participated in a study of an investigational agent and received study therapy or used and investigational device within 4 weeks of the first dose of treatment
  • Previously received pembrolizumab or other anti-programmed cell death-1 (PD-1) or anti-PD-L1 immunotherapy
  • Does not have measurable disease per RECIST 1.1
  • For cohort 2, received > 30 days of prior treatment with endocrine therapy +/- CDK4/6 inhibitors before screening (letrozole is allowed for prior adjuvant endocrine therapy)
  • Diagnosis of immunodeficiency or is receiving systemic steroid therapy or any other form of immunosuppressive therapy within 7 days prior to the first dose of trial treatment
  • Known history of active TB (Bacillus tuberculosis)
  • Hypersensitivity to pembrolizumab or any of its excipients
  • Prior anti-cancer monoclonal antibody (mAb) within 4 weeks prior to study day 1 or has not recovered (i.e., =< grade 1 or at baseline) for adverse events (AEs) due to agents administered > 4 weeks earlier
  • Prior chemotherapy, targeted small molecule therapy, or radiation therapy within 2 weeks prior to stay day 1 or has not recovered (i.e. =< grade 1 or at baseline) from AEs due to a previously administered agent

    • Note: Patients with =< grade 2 neuropathy are an exception to this criterion and may qualify for the study
    • Note: If patient received major surgery, she must have recovered adequately from the toxicity and/or complications from the intervention prior to starting therapy
  • Known additional malignancy that is progressing or requires active treatment; exceptions include basal cell carcinoma of the skin or squamous cell carcinoma of the skin that has undergone potentially curative therapy or in situ cervical cancer
  • Known active central nervous system (CNS) metastases and/or carcinomatous meningitis; patients with previously treated brain metastases may participate provided they are stable (without evidence of progression by imaging for at least 4 weeks prior to the first dose of trial treatment and any neurologic symptoms have returned to baseline), have no evidence of new or enlarging brain metastases, and are not using steroids for at least 7 days prior to trial treatment; this exception does not include carcinomatous meningitis, which is excluded regardless of clinical stability
  • Active autoimmune disease that has required systemic treatment in the past 2 years (i.e., with use of disease modifying agents, corticosteroids, or immunosuppressive drugs); replacement therapy (e.g., thyroxine, insulin, or physiologic corticosteroid replacement therapy for adrenal or pituitary insufficiency, etc.) is not considered a form of systemic treatment
  • History of (non-infectious) pneumonitis that required steroids or current pneumonitis
  • History of interstitial lung disease
  • Clinically active diverticulitis, intra-abdominal abscess, gastrointestinal (GI) obstruction, or abdominal carcinomatosis (known risks factors for bowel perforation)
  • Active infection requiring systemic therapy
  • History of significant cardiovascular disease, defined as: congestive heart failure greater than New York Heart Association (NYHA) class II according to the NYHA functional classification; unstable angina or myocardial infarction within 6 months of enrollment; or serious cardiac arrhythmia
  • Clinically significant electrocardiogram (ECG) abnormality, including a marked baseline prolonged QT/corrected QT (QTc) ([QT interval/corrected QT interval], e.g., a repeated demonstration of a QTc interval > 480 ms), a family or personal history of long or short QT syndrome, Brugada syndrome or known history of QTc prolongation, or Torsade de Pointes (TdP)
  • Concurrent use of drugs that are known to be moderate or strong cytochrome P450, family 3, subfamily A (CYP3A) inhibitors or inducers or drugs that are known to prolong the QT interval
  • History or current evidence of any condition, therapy, or laboratory abnormality that might confound the results of the trial, interfere with the patient's participation for the full duration of the trial, or is not in the best interests of the patient to participate, in the opinion of the treating investigator
  • Pregnant or breastfeeding, or expecting to conceive children within the projected duration of the trial, starting with the pre-screening or screening visit through 120 days after the last dose of trial treatment
  • Known psychiatric or substance abuse disorders that would interfere with cooperation with the requirements of the trial
  • Known history of human immunodeficiency virus (HIV) (HIV 1/2 antibodies)
  • Known active hepatitis B (e.g., hepatitis B surface antigen [HBsAg] reactive) or hepatitis C (e.g., hepatitis C virus [HCV] ribonucleic acid [RNA] [qualitative] is detected)
  • Received a live vaccine within 30 days of planned start of study therapy; * Note: Seasonal influenza vaccines for injection are generally inactivated flu vaccines and are allowed; however intranasal influenza vaccines (e.g., Flu-Mist) are live attenuated vaccines, and are not allowed

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02778685

Layout table for location information
United States, California
City of Hope Corona Recruiting
Corona, California, United States, 92879
Contact: Cheryl Corpus    626-256-4673 ext 81529   
Sub-Investigator: Misagh Karimi, MD         
City of Hope Medical Center Recruiting
Duarte, California, United States, 91010
Contact: Yuan Yuan, MD, PhD    800-826-4673   
Principal Investigator: Yuan Yuan, MD, PhD         
City of Hope Antelope Valley Recruiting
Lancaster, California, United States, 93534
Contact: Regan Johnson    626-256-4673 ext 25648   
Sub-Investigator: Mohammad Fekrazad, MD         
City of Hope Mission Hills Recruiting
Mission Hills, California, United States, 91345
Contact: Amy Shousha    626-256-4673 ext 81865   
Sub-Investigator: Suzy Melkonian, MD         
City of Hope Rancho Cucamonga Recruiting
Rancho Cucamonga, California, United States, 91730
Contact: Valerie Estala    626-256-4673 ext 81699   
Sub-Investigator: Naveen Gupta, MD         
City of Hope South Pasadena Recruiting
South Pasadena, California, United States, 91030
Contact: Odessa Rodriguez    626-256-4673 ext 81409   
Sub-Investigator: Christina Yeon, MD         
City of Hope West Covina Recruiting
West Covina, California, United States, 91790
Contact: Mei Zheng    626-256-4673 ext 81336   
Sub-Investigator: Cary Presant, MD         
Sponsors and Collaborators
City of Hope Medical Center
National Cancer Institute (NCI)
Layout table for investigator information
Principal Investigator: Yuan Yuan, MD, PhD City of Hope Medical Center
Publications automatically indexed to this study by Identifier (NCT Number):
Layout table for additonal information
Responsible Party: City of Hope Medical Center Identifier: NCT02778685    
Other Study ID Numbers: 16058
NCI-2016-00694 ( Registry Identifier: CTRP (Clinical Trial Reporting Program) )
16058 ( Other Identifier: City of Hope Medical Center )
First Posted: May 20, 2016    Key Record Dates
Last Update Posted: February 12, 2021
Last Verified: February 2021

Layout table for additional information
Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Additional relevant MeSH terms:
Layout table for MeSH terms
Breast Neoplasms
Neoplasms by Site
Breast Diseases
Skin Diseases
Antineoplastic Agents, Immunological
Antineoplastic Agents
Aromatase Inhibitors
Steroid Synthesis Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Estrogen Antagonists
Hormone Antagonists
Hormones, Hormone Substitutes, and Hormone Antagonists
Physiological Effects of Drugs
Protein Kinase Inhibitors