Cabozantinib in Women With Metastatic Hormone-Receptor-Positive Breast Cancer

May 22, 2025 updated by: Steven J Isakoff, MD, PhD, Massachusetts General Hospital

A Phase II Trial of Cabozantinib in Women With Metastatic Hormone-Receptor-Positive Breast Cancer With Involvement of Bone

The study drug cabozantinib works by inhibiting several different proteins which are believed to be involved in breast cancer tumor growth, its ability to spread, and its ability to form new blood vessels. This drug has been used in other research studies and information from those other research studies suggests that this drug may help to prevent cancer growth.

The single agent portion of this study is now closed to accrual. This research study is now examining the efficacy of cabozantinib in combination with fulvestrant for treatment of hormone-receptor-positive breast cancer that has spread to bone.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

Cabozantinib will be taken orally once a day in cycles of 28 days (4 weeks). Fulvestrant will be given intramuscularly on days 1 and 15 of cycle 1 and on day 1 of all subsequent cycles.

On Day 1 of each cycle subjects will have the following tests and procedures:

  • Performance status
  • Physical exam
  • Vital signs
  • Routine blood samples
  • Blood and urine samples to look at bone markers (Cycle 1 through 6 only)

Subjects will also have the following additional tests and procedures:

  • Tumor assessment by Computed Tomography (CT) scan and bone scan at Cycle 3, then every 12 weeks
  • Blood or urine pregnancy test (if applicable) on Day 1 of Cycles 1, 2, 4, then every 12 weeks
  • Urine sample and blood test for thyroid function (Cycle 1, 3, 5, then every 6 weeks)
  • Blood test for breast cancer tumor marker (Cycle 1 and 4, then every 6 weeks)
  • Pain questionnaire and painkiller medication diary at 7-day intervals during Week 3, Week 6, and every 6 weeks thereafter.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
68

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Massachusetts
      • Boston, Massachusetts, United States, 02115
        • Dana Farber Cancer Institute
      • Boston, Massachusetts, United States, 02214
        • Massachusetts General Hospital
      • Boston, Massachusetts, United States, 02115
        • Beth Israel Deaconess Medical Center
    • New York
      • New York, New York, United States, 10065
        • Memorial Sloan Kettering Cancer Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Clear evidence of metastases to bone on isotope bone scan
  • Histologically or cytologically confirmed metastatic Estrogen-receptor-positive (ER+) and/or Progesterone-receptor-positive (PR+) and Human Epidermal Growth Factor Receptor (HER) 2 negative breast cancer
  • Received at least one prior line of hormonal or chemo-therapy for metastatic disease
  • must be post menopausal
  • Recovered from toxicities related to prior treatment, except alopecia, lymphopenia, or other non-clinically significant Adverse Events (AEs)
  • Life expectancy > 3 months
  • Adequate organ and marrow function
  • Sexually active fertile subjects and their partners must agree to use medically accepted methods of contraception
  • Able to lie flat for up to 45 minutes for imaging studies
  • Able to swallow capsules or tablets

Exclusion Criteria:

  • Pregnant or breast-feeding
  • Has experienced clinically-significant hematemesis or hemoptysis of > 0.5 teaspoons of red blood, or other signs indicative of pulmonary hemorrhage within 3 months before the first dose of study treatment
  • Untreated, symptomatic or uncontrolled brain metastasis requiring current treatment including steroids and anti-convulsants
  • more than 1 prior line of chemotherapy for treatment of metastatic breast cancer
  • prior treatment with fulvestrant
  • Requires concomitant treatment, in therapeutic doses, with anticoagulants such as warfarin or coumadin-related agents, thrombin or Factor Xa inhibitors, and antiplatelet agents (eg, clopidogrel)
  • Uncontrolled or significant intercurrent illness
  • Gastrointestinal disorders, particularly those associated with a high risk of perforation or fistula formation
  • Active infection requiring systemic treatment
  • Serious non-healing wound/ulcer/bone fracture
  • History of organ transplant
  • Concurrent uncompensated hypothyroidism or thyroid dysfunction
  • Previously-identified allergy or hypersensitivity to components of the study treatment formulation
  • Diagnosis of another malignancy, requiring systemic treatment, within the last 2 years, unless non-melanoma skin cancer, in-situ carcinoma of the cervix, or superficial bladder cancer

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Sequential Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Cabozantinib
Oral cabozantinib therapy daily
Drug: Cabozantinib
Given orally daily with a starting dose of 40 mg
Other Names:
  • XL184
Experimental: Cabozantinib plus fulvestrant
Combination therapy with oral cabozantinib daily plus fulvestrant monthly Intramuscularly (IM)
Drug: Cabozantinib
Given orally daily with a starting dose of 40 mg
Other Names:
  • XL184
Drug: Fulvestrant
Given intramuscularly 500 mg on Days 1 and 15 of the first 28 day cycle, then on Day 1 only each cycle after
Other Names:
  • Faslodex

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Bone Scan Response Rate
Time Frame: 2 years
Bone scan response rate will be defined as the percentage of patients experiencing a complete resolution of bone lesions or partial response in the isotope bone scan per Bone Scan Time Point Response Criteria, as defined in the protocol. Complete resolution is defined as the disappearance of all areas of radiotracer uptake attributable to metastatic disease, and a partial response is defined as significant improvement in radiotracer uptake in areas attributable to metastatic disease, but not meeting the criteria for CR.
2 years

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Overall Response Rate by RECIST v 1.1
Time Frame: 2 years
The overall response rate (ORR) is defined as the percentage of patients experiencing a complete response or partial response on PET imaging per mRECIST (modified response evaluation criteria in solid tumors), as defined in the protocol. A complete response is defined as resolution of all areas of FDG uptake attributable to metastatic disease. A partial response is defined as significantly decreased FDG uptake in areas attributable to metastatic disease, but not meeting the criteria for a complete response.
2 years
Overall Survival
Time Frame: 5 years
Overall Survival (OS) is defined as the difference between the date of a patient's enrollment onto this study until the date of death. Patients who are alive at last contact will be censored for OS at this date.
5 years
Progression Free Survival
Time Frame: 5 years
Progression Free Survival (PFS) is defined as the difference between the date of a patient's enrollment onto this study until the earlier of the date of progression or the date of death. Patients who are alive and progression-free at last contact will be censored for PFS at this date.
5 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Massachusetts General Hospital

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Exelixis

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Steven J Isakoff, MD, PhD, Massachusetts General Hospital

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
October 1, 2011

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 12, 2016

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
August 9, 2019

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
September 22, 2011

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 27, 2011

First Posted (Estimated)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
September 28, 2011

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
May 25, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 22, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
May 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 11-208

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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