Clinical trial · Interventional
Tirzepatide for Weight Loss Intervention in Early-Stage Hormone Receptor Positive/HER2 Negative Breast Cancer
FITWISE: Feasibility Study of Tirzepatide for Weight Loss Intervention in Early-Stage Hormone Receptor Positive/HER2 Negative Breast Cancer
NCT06518837CI-TRIAL-00101246FITWISErecruitingPhase 2ClinicalTrials.gov clinicaltrialsProvenance
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
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).
Conditions
Conditions (2)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| HER2-Negative Breast Cancer | — | UNRESOLVED | — |
| Hormone Receptor-Positive Breast Cancer | — | UNRESOLVED | — |
Interventions
Interventions (1)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| Tirzepatide | Drug | — | UNRESOLVED |
Design
Arms and outcomes
Arms (1)
- type
- EXPERIMENTAL
- label
- Tirzepatide
- description
- 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.
- interventionNames
- Drug: Tirzepatide
Primary outcomes (1)
- measure
- Weight Loss Reduction with Tirzepatide during Adjuvant Treatment for HR+/Her2- Breast Cancer (Measured by Body Weight Reduction)
- timeFrame
- Through study completion, total of two years.
- description
- 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.
Eligibility
Eligibility (as posted)
- Sex
- All
- Minimum age
- 18 Years
Show eligibility criteria text
Inclusion Criteria: * 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). * 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. Exclusion Criteria: * 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.
References
Publications (0)
Data not yet available
No reference posted for this study.