Hormone Receptor-Positive Breast CancerPhase 2FITWISENCT06518837
Tirzepatide for Weight Loss Intervention in Early-Stage Hormone Receptor Positive/HER2 Negative Breast Cancer
A Phase 2 study testing Tirzepatide in people with Hormone Receptor-Positive Breast Cancer and HER2-Negative Breast Cancer, run by Rutgers, The State University of New Jersey at 7 sites in United States.
Trial summary
This clinical trial aims to evaluate the effectiveness of tirzepatide in achieving a 5% or more body weight reduction in patients undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Hormone Receptor-Positive Breast Cancer, HER2-Negative Breast Cancer
- What is being tested?
- Tirzepatide
- Type of treatment
- Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 40 participants
- Where
- 7 sitesUnited States
- Study dates
- 30 Oct 2024to 30 Sep 2027
- Phase
- Phase 2
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Consent: Be willing and able to provide written informed consent for the trial.
- Age: Male or Female patients aged 18 years or older.
- Breast Cancer Diagnosis: Have hormone receptor-positive (HR+), HER2-negative (HER2-) breast cancer previously diagnosed by biopsy. HR status is defined as estrogen receptor (ER) >10% and/or progesterone receptor (PR) >10%; HER2 status is defined as immunohistochemistry (IHC) 0 or 1+ or IHC 2+, fluorescence in situ hybridization (FISH) negative.
- Stage: Have previously untreated early-stage, clinical or anatomic stage I, II, or III hormone receptor-positive breast cancer.
- Definitive Treatment: Have had definitive treatment with curative intent for breast cancer, including surgery, chemotherapy, and radiotherapy as indicated.
- Body Mass Index (BMI): Have a BMI of 30 kg/m² or more, or a BMI of 27 kg/m² or more with one weight-related complication (e.g., hypertension, type 2 diabetes, dyslipidemia, obstructive sleep apnea, or cardiovascular disease).
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- Performance Status: Have an Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 2.
- Cardiac Function: Have a left ventricular ejection fraction (LVEF) of 50% or greater, or greater than the institution's lower limit of normal (LLN), as assessed by echocardiogram (ECHO) or multigated acquisition (MUGA) scan performed at screening.
- Organ Function: Demonstrate adequate organ function in screening labs.
- Tumor Specimens: Have archived biopsy or surgical tumor specimens available as tumor blocks or unstained slides.
Who cannot join
- Other Clinical Studies: Is currently enrolled, or will enroll in, a different clinical study in which investigational therapeutic procedures are performed or investigational therapies are administered while participating in this study.
- Stage IV Breast Cancer: Have stage IV, metastatic breast cancer.
- Cancer Type: Have HER2-positive or triple-negative breast cancer.
- Active Malignancy: Have a concomitant active malignancy.
- Performance Status: Have an Eastern Cooperative Oncology Group (ECOG) performance status greater than 2.
- Body Mass Index: Have a BMI of less than 27 kg/m².
- Type 1 Diabetes Mellitus: Have type 1 diabetes mellitus.
- Gastric Emptying Abnormality: Have a known clinically important gastric emptying abnormality (e.g., severe gastroparesis or gastric outlet obstruction) or chronically took drugs that directly affect gastrointestinal motility.
Trial locations and contacts
7 sites in 1 country. Contact the study team or a site near you to ask about taking part.
7 sites in 1 country
United States7 sites, 7 recruiting
- Recruiting
Trinitas Comprehensive Cancer Center
Elizabeth, New Jersey, 07202
Coral Omene, MD.,PhD, 732-235-3374, co273@cinj.rutgers.edu
- Not yet recruiting
RWJ Barnabas Health - Robert Wood Johnson University Hospital, Hamilton
Hamilton, New Jersey, 08690
Coral Omene, MD.,PhD, 732-235-3374, co273@cinj.rutgers.edu
- Recruiting
RWJBarnabas Health - Cooperman Barnabas, Livingston
Livingston, New Jersey, 07039
Coral Omene, MD.,PhD, 732-235-3374, co273@cinj.rutgers.edu
- Recruiting
RWJBarnabas Health - Monmouth Medical Center
Long Branch, New Jersey, 07740
Coral Omene, MD., PhD, 732-235-3374, co273@cinj.rutgers.edu
- Recruiting
Rutgers Cancer Institute
New Brunswick, New Jersey, 08901
Coral Omene,, MD.PhD, 732-235-3374, co273@cinj.rutgers.edu
- Recruiting
RWJBarnabas Health - Newark Beth Israel Medical Center
Newark, New Jersey, 07112
Coral Omene, MD., PhD, 732-235-3374, co273@cinj.rutgers.edu
- Recruiting
RWJ Barnabas Health - Robert Wood Johnson University Hospital, Somerset
Somerville, New Jersey, 08876
Coral Omene, MD., PhD, 732-235-3374, co273@cinj.rutgers.edu
About this study
Official title: FITWISE: Feasibility Study of Tirzepatide for Weight Loss Intervention in Early-Stage Hormone Receptor Positive/HER2 Negative Breast Cancer
This clinical trial aims to evaluate the effectiveness of tirzepatide in achieving a 5% or more body weight reduction in patients undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. The study will also assess the safety and tolerability of tirzepatide, its feasibility based on discontinuation rates, and completion of treatment. Secondary objectives include evaluating 3-year invasive disease-free survival (IDFS) and distant relapse-free survival (DRFS), changes in BMI and body fat distribution, metabolic markers, and circulating tumor DNA (ctDNA).
Read the detailed description
The primary objective of this clinical trial is to determine the proportion of patients who achieve a 5% or greater reduction in body weight by the end of the study treatment with tirzepatide, during adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. Secondary objectives include assessing the safety and tolerability of tirzepatide for weight loss during this treatment. The feasibility of using tirzepatide for weight loss intervention will be evaluated through discontinuation rates and completion of the treatment course. Additionally, the trial will determine the 3-year invasive disease-free survival (IDFS) and 3-year distant relapse-free survival (DRFS) with the use of tirzepatide. The study will also assess changes in Body Mass Index (BMI), body fat distribution (measured via Waist/Hip Ratio (WHR) and waist circumference), and obesity-related metabolic markers (including Blood Pressure, fasting insulin, fasting blood glucose, HgbA1c, cholesterol, LDL, HDL, triglycerides, IGF1, estrogen, and testosterone). Finally, the trial will monitor for circulating tumor DNA (ctDNA) and assess changes when using tirzepatide for weight loss in the adjuvant treatment of HR+/Her2- breast cancer. Quality of Life assessments will be obtained and exploratory objectives investigating adipokines (adiponectin, leptin) and their receptors, metabolomic pathways and immune cell metabolism will be conducted.
- Being tested
- Tirzepatide
- Keywords
- Weight Loss, Body Weight Reduction, Feasibility of Weight Loss Intervention, invasive Disease-Free Survival (IDFS), Body Mass Index (BMI), Body Fat Distribution, Metabolic Markers, Circulating Tumor DNA (ctDNA), Tirzepatide, GIP and GLP-1 dual agonist, Black patients, distant relapse-free survival (DRFS)
- Medical subject headings
- Weight Loss
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
TirzepatideDrug
Also called LY3298176 (development code name), Mounjaro (brand name in certain regions), Zepbound (brand name in certain regions)
The intervention aims to assess the feasibility, safety, and efficacy of tirzepatide for weight loss in patients with early-stage hormone receptor-positive, HER2-negative breast cancer, potentially improving treatment outcomes and overall health.
| Study group | Role | What they receive |
|---|---|---|
| Tirzepatide | Experimental | Tirzepatide will be administered subcutaneously in the stomach, upper arm, or thigh, rotating injection sites with each dose. Administer once weekly at any time of day, with or without meals. Start with an initial dosage of 2.5 mg. After 4 weeks, increase to 5 mg weekly. Further increases may be made in 2.5 mg increments after at least 4 weeks on the current dose, aiming for a target of 15 mg (i.e., 2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg, or 15 mg). Consider treatment tolerability when selecting the maintenance dose. If not tolerated, consider the next lower maintenance dose. Recommended maintenance doses are 5 mg, 10 mg, or 15 mg, with 5 mg as the lowest evaluable dose. The 2.5 mg dose is not a maintenance dose. The maximum allowed dosage is 15 mg once weekly. Receives: Drug: Tirzepatide |
What is being measured
The primary outcome is the main question the study is designed to answer.
Weight Loss Reduction with Tirzepatide during Adjuvant Treatment for HR+/Her2- Breast Cancer (Measured by Body Weight Reduction)
To determine the effectiveness of tirzepatide in facilitating a 5% or more weight loss in patients undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer.
Measured: Through study completion, total of two years.
Secondary outcomes (15)
Safety and Tolerability of Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer (Measured by Incidence of Adverse Events Using CTCAE v5.0)
This outcome assesses the safety and tolerability of tirzepatide for weight loss in patients undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. The primary focus is to monitor and document the incidence of adverse events (AEs) associated with tirzepatide use, utilizing the Common Terminology Criteria for Adverse Events (CTCAE) version 5.0. This assessment will help determine the risk profile of tirzepatide and ensure that the benefits of weight loss outweigh potential adverse effects in this patient population.
Measured: Adverse events will be monitored through study completion for two years.
Feasibility of Tirzepatide for Weight Loss Intervention during Adjuvant Treatment for HR+/Her2- Breast Cancer (Assessed by Discontinuation Rates and Completion of Treatment Course).
This outcome measures the feasibility of using tirzepatide for weight loss intervention in patients undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. The primary focus is to assess the intervention's practicality by evaluating discontinuation rates and the completion of the treatment course. High completion rates and low discontinuation rates will indicate that tirzepatide is a feasible weight loss intervention in this patient population.
Measured: Feasibility will be evaluated through study completion for two years.
Clinical Efficacy of Tirzepatide during Adjuvant Treatment for HR+/Her2- Breast Cancer (Measured by 3-Year Invasive Disease-Free Survival and 3-Year Distant Relapse-Free Survival)
This outcome measures the clinical efficacy of tirzepatide in patients undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. The primary focus is to determine the 3-year invasive disease-free survival (IDFS) and the 3-year distant relapse-free survival (DRFS) rates. These metrics will help evaluate whether weight loss using tirzepatide contributes to preventing cancer recurrence and metastasis in this patient population.
Measured: Patients will be monitored for recurrence through study completion and an additional year, for total three years.
Assessment of Obesity Measurements Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer, as measured by Waist/Hip Ratio (WHR), and waist circumference.
This outcome measures the impact of tirzepatide on obesity-related metrics in patients undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. The primary focus is to evaluate changes in Body Mass Index (BMI), body fat distribution as measured by Waist/Hip Ratio (WHR), and waist circumference. These assessments will help determine the effectiveness of tirzepatide in improving body fat distribution and reducing obesity in this patient population. Weight and height will be combined to report BMI in kg/m^2 and waist circumference reported in inches.
Measured: Obesity measurements will be evaluated through study completion for two years.
Assessment of Obesity Measurements Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer, Weight and height will be combined to report BMI in kg/m^2.
This outcome measures the impact of tirzepatide on obesity-related metrics in patients undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. The primary focus is to evaluate changes in Body Mass Index (BMI), body fat distribution These assessments will help determine the effectiveness of tirzepatide in improving body fat distribution and reducing obesity in this patient population. Weight and height will be combined to report BMI in kg/m^2.
Measured: Obesity measurements will be evaluated through study completion for two years.
Assessment of Obesity-Related Metabolic Markers Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer Assessment of Blood Pressure Changes unit of Measure: Millimeters of mercury (mm Hg).
This outcome measures the impact of tirzepatide on obesity-related metabolic markers in participants undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. The primary focus is to evaluate changes in various metabolic markers, blood pressure (mm Hg),assessment of blood pressure changes unit of measure: millimeters of mercury (mm Hg)These assessments will help determine the effectiveness of tirzepatide in improving metabolic health and reducing obesity-related risks in this participant population.
Measured: Metabolic markers will be evaluated through study completion for two years.
Assessment of Obesity-Related Metabolic Markers Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer Assessment of fasting insulin changes, unit of Measure: Milli-international units per liter (mIU/L)
This outcome measures the impact of tirzepatide on obesity-related metabolic markers in participants undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. The primary focus is to evaluate changes in various metabolic markers, Assessment of Fasting Insulin changes, unit of measure: milli-international units per liter (mIU/L)This assessment will help determine the effectiveness of tirzepatide in improving metabolic health and reducing obesity-related risks in this participant population.
Measured: Metabolic markers will be evaluated through study completion for two years.
Assessment of Obesity-Related Metabolic Markers Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer, Assessment of Fasting Blood Glucose Changes, Unit of Measure: Millimoles per liter (mmol/L)
This outcome measures the impact of tirzepatide on obesity-related metabolic markers in participants undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. The primary focus is to evaluate changes in various metabolic markers, assessment of fasting blood glucose changes unit of measure: millimoles per liter (mmol/L). This assessment will help determine the effectiveness of tirzepatide in improving metabolic health and reducing obesity-related risks in this participant population.
Measured: Metabolic markers will be evaluated through study completion for two years.
Assessment of Obesity-Related Metabolic Markers Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer Assessment of HgbA1c Changes, Unit of Measure: Millimoles per mole (mmol/mol)
This outcome measures the impact of tirzepatide on obesity-related metabolic markers in participants undergoing adjuvant treatment for hormone receptor-positive, HER2-assessment of HgbA1c Changes unit of measure: millimoles per mole (mmol/mol). This assessment will help determine the effectiveness of tirzepatide in improving metabolic health and reducing obesity-related risks in this participant population.
Measured: Metabolic markers will be evaluated through study completion for two years.
Assessment of Obesity-Related Metabolic Markers Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer Assessment of Cholesterol (Total, LDL, HDL) Changes Unit of Measure: Milligrams per deciliter (mg/dl)
This outcome measures the impact of tirzepatide on obesity-related metabolic markers in participants undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. The primary focus is to evaluate changes in various metabolic markers, assessment of cholesterol (Total, LDL, HDL) changes unit of measure: milligrams per deciliter (mg/dl)This assessment will help determine the effectiveness of tirzepatide in improving metabolic health and reducing obesity-related risks in this participant population.
Measured: Metabolic markers will be evaluated through study completion for two years.
Assessment of Obesity-Related Metabolic Markers Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer, Assessment of Triglyceride Changes Unit of Measure: Millimoles per liter (mmol/L)
This outcome measures the impact of tirzepatide on obesity-related metabolic markers in participants undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. The primary focus is to evaluate changes in various metabolic markers, assessment of triglyceride changes unit of measure: millimoles per liter (mmol/L)This assessment will help determine the effectiveness of tirzepatide in improving metabolic health and reducing obesity-related risks in this participant population.
Measured: Metabolic markers will be evaluated through study completion for two years.
Assessment of Obesity-Related Metabolic Markers Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer, Assessment of IGF1 Changes, Unit of Measure: Nanograms per milliliter (ng/ml)
This outcome measures the impact of tirzepatide on obesity-related metabolic markers in participants undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. The primary focus is to evaluate changes in various metabolic markers, assessment of IGF1 changes unit of measure: nanograms per milliliter (ng/ml)This assessment will help determine the effectiveness of tirzepatide in improving metabolic health and reducing obesity-related risks in this participant population.
Measured: Metabolic markers will be evaluated through study completion for two years.
Assessment of Obesity-Related Metabolic Markers Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer, Assessment of Estrogen Changes, Unit of Measure: Picograms per milliliter (pg/ml)
This outcome measures the impact of tirzepatide on obesity-related metabolic markers in participants undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. The primary focus is to evaluate changes in various metabolic markers, assessment of estrogen changes unit of measure: Picograms per milliliter (pg/ml)This assessment will help determine the effectiveness of tirzepatide in improving metabolic health and reducing obesity-related risks in this participant population.
Measured: Metabolic markers will be evaluated through study completion for two years.
Assessment of Obesity-Related Metabolic Markers Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer Assessment of Testosterone Changes, Unit of Measure: Nanograms per deciliter (ng/dL)
This outcome measures the impact of tirzepatide on obesity-related metabolic markers in participants undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. The primary focus is to evaluate changes in various metabolic markers, assessment of testosterone changes unit of measure: nanograms per deciliter (ng/dL)This assessment will help determine the effectiveness of tirzepatide in improving metabolic health and reducing obesity-related risks in this participant population.
Measured: Metabolic markers will be evaluated through study completion for two years.
Monitoring Circulating Tumor DNA (ctDNA) Levels Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer (Detection and Changes in ctDNA Levels during Treatment).
This outcome measures the effect of tirzepatide on circulating tumor DNA (ctDNA) levels, which potentially serve as an early indicator of cancer recurrence in participants undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. The primary focus is to detect ctDNA and monitor changes in its levels throughout the treatment duration. Assessing ctDNA levels can provide insights into the molecular response to obesity treatment using tirzepatide.
Measured: ctDNA levels will be monitored through study completion for two years.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted24 Jul 2024
- Study start30 Oct 2024
- Primary completion30 Sep 2027 (estimated)
- Study completion30 Sep 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Hormone Receptor-Positive Breast CancerStudies of the same condition, open and under way.
- More trials run by Rutgers, The State University of New JerseyThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Model description
- Tirzepatide will be administered subcutaneously in the stomach, upper arm, or thigh. Administer once weekly at any time of day, with or without meals. Start with an initial dosage of 2.5 mg. After 4 weeks, increase to 5 mg weekly. Further increases may be made in 2.5 mg increments after at least 4 weeks on the current dose, aiming for a target of 15 mg (i.e., 2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg, or 15 mg). Consider treatment tolerability when selecting the maintenance dose. If not tolerated, consider the next lower maintenance dose. Recommended maintenance doses are 5 mg, 10 mg, or 15 mg, with 5 mg as the lowest evaluable dose. The 2.5 mg dose is not a maintenance dose. The maximum allowed dosage is 15 mg once weekly. 20 Black and 20 Non-Black breast cancer patients will be enrolled. More black patients will be enrolled to enrich this cohort with the population that has an established significant disparity in HR+ breast cancer and obesity related outcomes.
- Masking
- None (open label)
- Enrolment
- 40 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Rutgers, The State University of New Jersey
- Sponsor type
- University, hospital or other
- Collaborators
- Ludwig Institute for Cancer Research
- Responsible party
- Principal investigator, Coral Omene, Rutgers Cancer Institute of New Jersey
- Investigators
- Coral Omene, MD., PhD, Principal investigator, Rutgers Cancer Institute
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06518837
- Sponsor's protocol ID
- 042403
- Acronym
- FITWISE
- Status last verified
- Jan 2026
- First submitted
- 27 Jun 2024
- Last updated
- 21 Jan 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 21 Jan 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- FITWISE: Feasibility Study of Tirzepatide for Weight Loss Intervention in Early-Stage Hormone Receptor Positive/HER2 Negative Breast Cancer
- ClinicalTrials.gov ID
- NCT06518837
- Acronym / sponsor ID
- FITWISE / 042403
- Keywords
- Weight Loss, Body Weight Reduction, Feasibility of Weight Loss Intervention, invasive Disease-Free Survival (IDFS), Body Mass Index (BMI), Body Fat Distribution, Metabolic Markers, Circulating Tumor DNA (ctDNA)
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 40 participants (estimated)
- Lead sponsor
- Rutgers, The State University of New JerseyUniversity, hospital or other
- Collaborators
- Ludwig Institute for Cancer Research
- Study start
- 30 Oct 2024 (actual)
- Primary completion
- 30 Sep 2027 (estimated)
- Study completion
- 30 Sep 2027 (estimated)
- First posted
- 24 Jul 2024 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This clinical trial aims to evaluate the effectiveness of tirzepatide in achieving a 5% or more body weight reduction in patients undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. The study will also assess the safety and tolerability of tirzepatide, its feasibility based on discontinuation rates, and completion of treatment. Secondary objectives include evaluating 3-year invasive disease-free survival (IDFS) and distant relapse-free survival (DRFS), changes in BMI and body fat distribution, metabolic markers, and circulating tumor DNA (ctDNA).
Detailed description
The primary objective of this clinical trial is to determine the proportion of patients who achieve a 5% or greater reduction in body weight by the end of the study treatment with tirzepatide, during adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer. Secondary objectives include assessing the safety and tolerability of tirzepatide for weight loss during this treatment. The feasibility of using tirzepatide for weight loss intervention will be evaluated through discontinuation rates and completion of the treatment course. Additionally, the trial will determine the 3-year invasive disease-free survival (IDFS) and 3-year distant relapse-free survival (DRFS) with the use of tirzepatide. The study will also assess changes in Body Mass Index (BMI), body fat distribution (measured via Waist/Hip Ratio (WHR) and waist circumference), and obesity-related metabolic markers (including Blood Pressure, fasting insulin, fasting blood glucose, HgbA1c, cholesterol, LDL, HDL, triglycerides, IGF1, estrogen, and testosterone). Finally, the trial will monitor for circulating tumor DNA (ctDNA) and assess changes when using tirzepatide for weight loss in the adjuvant treatment of HR+/Her2- breast cancer. Quality of Life assessments will be obtained and exploratory objectives investigating adipokines (adiponectin, leptin) and their receptors, metabolomic pathways and immune cell metabolism will be conducted.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
- Model description
- Tirzepatide will be administered subcutaneously in the stomach, upper arm, or thigh. Administer once weekly at any time of day, with or without meals. Start with an initial dosage of 2.5 mg. After 4 weeks, increase to 5 mg weekly. Further increases may be made in 2.5 mg increments after at least 4 weeks on the current dose, aiming for a target of 15 mg (i.e., 2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg, or 15 mg). Consider treatment tolerability when selecting the maintenance dose. If not tolerated, consider the next lower maintenance dose. Recommended maintenance doses are 5 mg, 10 mg, or 15 mg, with 5 mg as the lowest evaluable dose. The 2.5 mg dose is not a maintenance dose. The maximum allowed dosage is 15 mg once weekly. 20 Black and 20 Non-Black breast cancer patients will be enrolled. More black patients will be enrolled to enrich this cohort with the population that has an established significant disparity in HR+ breast cancer and obesity related outcomes.
| Arm | Type | Receives |
|---|---|---|
| Tirzepatide | Experimental | Drug: TirzepatideTirzepatide will be administered subcutaneously in the stomach, upper arm, or thigh, rotating injection sites with each dose. Administer once weekly at any time of day, with or without meals. Start with an initial dosage of 2.5 mg. After 4 weeks, increase to 5 mg weekly. Further increases may be made in 2.5 mg increments after at least 4 weeks on the current dose, aiming for a target of 15 mg (i.e., 2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg, or 15 mg). Consider treatment tolerability when selecting the maintenance dose. If not tolerated, consider the next lower maintenance dose. Recommended maintenance doses are 5 mg, 10 mg, or 15 mg, with 5 mg as the lowest evaluable dose. The 2.5 mg dose is not a maintenance dose. The maximum allowed dosage is 15 mg once weekly. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (10 listed)
- Consent: Be willing and able to provide written informed consent for the trial.
- Age: Male or Female patients aged 18 years or older.
- Breast Cancer Diagnosis: Have hormone receptor-positive (HR+), HER2-negative (HER2-) breast cancer previously diagnosed by biopsy. HR status is defined as estrogen receptor (ER) >10% and/or progesterone receptor (PR) >10%; HER2 status is defined as immunohistochemistry (IHC) 0 or 1+ or IHC 2+, fluorescence in situ hybridization (FISH) negative.
- Stage: Have previously untreated early-stage, clinical or anatomic stage I, II, or III hormone receptor-positive breast cancer.
- Definitive Treatment: Have had definitive treatment with curative intent for breast cancer, including surgery, chemotherapy, and radiotherapy as indicated.
Key exclusion criteria (8 listed)
- Other Clinical Studies: Is currently enrolled, or will enroll in, a different clinical study in which investigational therapeutic procedures are performed or investigational therapies are administered while participating in this study.
- Stage IV Breast Cancer: Have stage IV, metastatic breast cancer.
- Cancer Type: Have HER2-positive or triple-negative breast cancer.
- Active Malignancy: Have a concomitant active malignancy.
- Performance Status: Have an Eastern Cooperative Oncology Group (ECOG) performance status greater than 2.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| TirzepatideAlso: LY3298176 (development code name), Mounjaro (brand name in certain regions), Zepbound (brand name in certain regions)The intervention aims to assess the feasibility, safety, and efficacy of tirzepatide for weight loss in patients with early-stage hormone receptor-positive, HER2-negative breast cancer, potentially improving treatment outcomes and overall health. | Drug | Tirzepatide |
Primary outcome
Weight Loss Reduction with Tirzepatide during Adjuvant Treatment for HR+/Her2- Breast Cancer (Measured by Body Weight Reduction)
Time frame: Through study completion, total of two years.
To determine the effectiveness of tirzepatide in facilitating a 5% or more weight loss in patients undergoing adjuvant treatment for hormone receptor-positive, HER2-negative (HR+/Her2-) breast cancer.
15 secondary outcomes
Safety and Tolerability of Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer (Measured by Incidence of Adverse Events Using CTCAE v5.0)
Time frame: Adverse events will be monitored through study completion for two years.
Feasibility of Tirzepatide for Weight Loss Intervention during Adjuvant Treatment for HR+/Her2- Breast Cancer (Assessed by Discontinuation Rates and Completion of Treatment Course).
Time frame: Feasibility will be evaluated through study completion for two years.
Clinical Efficacy of Tirzepatide during Adjuvant Treatment for HR+/Her2- Breast Cancer (Measured by 3-Year Invasive Disease-Free Survival and 3-Year Distant Relapse-Free Survival)
Time frame: Patients will be monitored for recurrence through study completion and an additional year, for total three years.
Assessment of Obesity Measurements Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer, as measured by Waist/Hip Ratio (WHR), and waist circumference.
Time frame: Obesity measurements will be evaluated through study completion for two years.
Assessment of Obesity Measurements Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer, Weight and height will be combined to report BMI in kg/m^2.
Time frame: Obesity measurements will be evaluated through study completion for two years.
Assessment of Obesity-Related Metabolic Markers Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer Assessment of Blood Pressure Changes unit of Measure: Millimeters of mercury (mm Hg).
Time frame: Metabolic markers will be evaluated through study completion for two years.
Assessment of Obesity-Related Metabolic Markers Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer Assessment of fasting insulin changes, unit of Measure: Milli-international units per liter (mIU/L)
Time frame: Metabolic markers will be evaluated through study completion for two years.
Assessment of Obesity-Related Metabolic Markers Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer, Assessment of Fasting Blood Glucose Changes, Unit of Measure: Millimoles per liter (mmol/L)
Time frame: Metabolic markers will be evaluated through study completion for two years.
Assessment of Obesity-Related Metabolic Markers Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer Assessment of HgbA1c Changes, Unit of Measure: Millimoles per mole (mmol/mol)
Time frame: Metabolic markers will be evaluated through study completion for two years.
Assessment of Obesity-Related Metabolic Markers Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer Assessment of Cholesterol (Total, LDL, HDL) Changes Unit of Measure: Milligrams per deciliter (mg/dl)
Time frame: Metabolic markers will be evaluated through study completion for two years.
Assessment of Obesity-Related Metabolic Markers Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer, Assessment of Triglyceride Changes Unit of Measure: Millimoles per liter (mmol/L)
Time frame: Metabolic markers will be evaluated through study completion for two years.
Assessment of Obesity-Related Metabolic Markers Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer, Assessment of IGF1 Changes, Unit of Measure: Nanograms per milliliter (ng/ml)
Time frame: Metabolic markers will be evaluated through study completion for two years.
Assessment of Obesity-Related Metabolic Markers Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer, Assessment of Estrogen Changes, Unit of Measure: Picograms per milliliter (pg/ml)
Time frame: Metabolic markers will be evaluated through study completion for two years.
Assessment of Obesity-Related Metabolic Markers Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer Assessment of Testosterone Changes, Unit of Measure: Nanograms per deciliter (ng/dL)
Time frame: Metabolic markers will be evaluated through study completion for two years.
Monitoring Circulating Tumor DNA (ctDNA) Levels Using Tirzepatide for Weight Loss during Adjuvant Treatment for HR+/Her2- Breast Cancer (Detection and Changes in ctDNA Levels during Treatment).
Time frame: ctDNA levels will be monitored through study completion for two years.
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 21 Jan 2026.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Coral Omene, MD., PhD principal investigator
Rutgers Cancer Institute
7 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing Tirzepatide in people with Hormone Receptor-Positive Breast Cancer and HER2-Negative Breast Cancer, run by Rutgers, The State University of New Jersey at 7 sites in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 10 inclusion and 8 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 21 Jan 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 7 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Coral Omene, MD., PhD (732-235-3374, co273@cinj.rutgers.edu), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Weight Loss Reduction with Tirzepatide during Adjuvant Treatment for HR+/Her2- Breast Cancer (Measured by Body Weight Reduction) (time frame: Through study completion, total of two years.). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 21 Jan 2026.