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GCC 1366: Anti-Proliferative Response to NeoAdjuvant AIs in Overweight and Obese Patients

This study is currently recruiting participants.
Verified September 2017 by Emily Bellavance, University of Maryland
Sponsor:
ClinicalTrials.gov Identifier:
NCT02095184
First Posted: March 24, 2014
Last Update Posted: September 4, 2017
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.
Information provided by (Responsible Party):
Emily Bellavance, University of Maryland
March 20, 2014
March 24, 2014
September 4, 2017
May 25, 2015
March 2018   (Final data collection date for primary outcome measure)
Percent change in proliferative index (Ki67) after treatment with the standard dose anastrozole or letrozole in normal, obese, and overweight patients [ Time Frame: 2-4 weeks Post-treatment ]
Core biopsy
Percent change in proliferative index (Ki67) after treatment with the standard dose anastrozole or letrozole in normal, obese, and overweight patients [ Time Frame: 2-4 weeks ]
Percent change in proliferative index (Ki67) after treatment with the standard dose anastrozole or letrozole in normal, obese, and overweight patients
Complete list of historical versions of study NCT02095184 on ClinicalTrials.gov Archive Site
  • To evaluate differences in baseline GP88 level [ Time Frame: B,0-Prior to starting anastrozole or letrozole ]
    GP88-6ml Blood Serum Sample
  • To evaluate differences in baseline GP88 level [ Time Frame: B,1-On the day of surgery or within 3 days of surgery ]
    GP88-6ml Blood Serum Sample
  • To evaluate differences in baseline GP88 level [ Time Frame: B,2-obtained 2-4 weeks after initiation of AI therapy( for persons rec. extended neoadjuvant tx) ]
    GP88-6ml Blood Serum Sample
  • To assess estradiol levels at baseline and after treatment (in primary ER positive breast tumors) [ Time Frame: Baseline ]
    10ml Blood Serum Sample
  • To assess estradiol levels at baseline and after treatment (in primary ER positive breast tumors) [ Time Frame: 2-4 weeks Post treatment ]
    10ml Blood Serum Sample
  • To evaluate the association of AI-induced Ki67 response [ Time Frame: Baseline ]
    (IHC)--Immunohistochemistry
  • To evaluate the association of AI-induced Ki67 response [ Time Frame: 2-4 weeks Post-Treatment ]
    (IHC)--Immunohistochemistry
  • To evaluate differences in Oncotype Dx [ Time Frame: Baseline(T0) ]
    Tumor Tissue Assay
  • To evaluate differences in Oncotype Dx [ Time Frame: 2-4 Post-treatment ]
    Tumor Tissue Assay
Not Provided
  • Metabolomic Profiling [ Time Frame: B-0 ]
    10ml Blood Serum Sample
  • Metabolomic Profiling [ Time Frame: B-1 ]
    10ml Blood Serum Sample
  • Metabolomic Profiling [ Time Frame: B-2 ]
    10ml Blood Serum Sample
Not Provided
 
GCC 1366: Anti-Proliferative Response to NeoAdjuvant AIs in Overweight and Obese Patients
GCC 1366: A Prospective Study of Neoadjuvant Non-Steroidal Aromatase Inhibitors to Evaluate Anti-Proliferative Response in Obese and Overweight Patients

More than three quarter of patients with breast cancer are treated by hormone pills called tamoxifen and aromatase inhibitors (AIs). AIs are drugs that stop female hormone production. This hormone production mostly happens in fat, muscle, and breast tissue in postmenopausal women. The female hormone estrogen is an important hormone for the growth of breast cancer cells. Anastrozole (Arimidex®) and Letrozole (Femara®) are AIs that are approved by the Food and Drug Administration (FDA). They have been used since 2005 to treat women with early stage breast cancer.

When given before surgery (neoadjuvant), both anastrozole and letrozole have been shown to successfully shrink breast cancer tumors in most patients. In over 50% of patients, anastrozole and letrozole when given for about 4 months also helped to improve surgery outcomes. On top of that, whether or not a patient responds to anastrozole and letrozole before surgery can help the doctor decide whether that patient needs additional chemotherapy.

One of the things may influence the level of hormone is body weight. It has been previously shown that postmenopausal women with higher body fat have higher level of female hormone as well as an increased risk of breast cancer. This is likely due to an increase in aromatase activity in the fatty tissue. However, at the current time AIs are used at the same doses in all women with breast cancer no matter whether they have different body weight. Currently, we do not know for certain whether the same doses of AIs work as well in patients with higher body fat compared to patients with less body fat.

The purpose of this study is to see if women with higher body fat respond differently to AI treatment compared to women with lower body fat.

GCC 1366 is a prospective randomized window trial to evaluate the anti-proliferative response in obese and overweight breast cancer patients treated with neoadjuvant non-steroidal aromatase inhibitors. Post-menopausal women over the age of 18 years with estrogen receptor positive Her 2 neu negative stage II-III breast cancer are eligible. Participants will be randomized according to BMI to neoadjuvant treatment with Arimidex or Letrozole.

A total of 90 patients will be enrolled with 15 patients in each cohort below.

  • Cohort 1: Patients with BMI < 25.0 kg/m2 treating with anastrozole
  • Cohort 2: Patients with BMI ≥ 25.0-29.9 kg/m2 treating with anastrozole
  • Cohort 3: Patients with BMI ≥ 30 kg/m2 treating with anastrozole
  • Cohort 4: Patients with BMI < 25.0 kg/m2 treating with letrozole
  • Cohort 5: Patients with BMI ≥ 25.0-29.9 kg/m2 treating with letrozole
  • Cohort 6: Patients with BMI ≥ 30 kg/m2 treating with letrozole

Based on the patients' calculated BMI, patients in each BMI category (normal, overweight, and obese) will be enrolled in the different cohorts as described above. The first 15 patients in each BMI category will be treated with anastrozole. After completion of enrollment in cohorts 1, 2, and 3, subsequent patients will be treated with letrozole in cohorts 4, 5, and 6.

Anastrozole 1 mg or Letrozole 2.5 mg oral daily will be administered and continued for a minimum of 14 days and a maximum of 28 days (2-4 weeks). Surgery will be performed between weeks 2-3 of treatment unless there are compelling medical or personal reasons that prevent a patient from having surgery during this time. In those cases, patients may continue anastrozole or letrozole up to 4 weeks before surgery. Surgery should be performed within 36 hours of the last dose of anastrozole or letrozole.

Tumor tissue that is obtained for diagnosis or to assess response to initial AI therapy will be utilized for correlative studies. A patient may be continued on anastrozole or letrozole beyond 4 weeks (up to 18 weeks) if in the opinion of the treating physician, the patient will benefit from extended endocrine therapy. In this context, patients will have a core needle biopsy performed at 2-4 weeks after treatment to assess Ki67 response to AI therapy. Patients with an appropriate response to treatment as determined by a decrease in Ki67 levels (≤10%) will be continued on AI treatment. Patients without an appropriate decrease in Ki67 levels will be recommended to have immediate surgery or a switch to neoadjuvant chemotherapy if desired by the patient and treating physician.

Patients on extended AI neoadjuvant treatment having core biopsy at 2-4 weeks for Ki67 determination for clinical decision making will be approached and consented for additional research tissues to be taken at the same time as the biopsy for Ki67 determination. Blood samples will be collected prior to starting treatment and within 3 days or on the day of surgery. Additional blood samples will be obtained as clinically necessary.

Clinical assessment will be performed prior to enrollment and within 3 days or on the day of surgery. For patients who continue neoadjuvant endocrine therapy past 4 weeks, clinical assessment will be performed at the time of clinical biopsy and every 4-6 weeks thereafter. For clinical evidence of progression, patients will be offered immediate surgery or switch to neoadjuvant chemotherapy at the discretion of the treating physician.

Radiological assessment including mammogram, ultrasound, and breast MRI will be performed as per standard of care.

Patients will be followed for 30 days on study after the last dose of anastrozole or letrozole prior to surgery. For patients who receive extended neoadjuvant therapy with anastrozole or letrozole and for patients who receive other primary treatment after anastrozole or letrozole administration prior to surgery, patients will be followed for 30 days on study after the last dose of anastrozole or letrozole. Patients continuing to experience adverse events attributable to anastrozole or letrozole will be followed as needed until resolution or stabilization of the adverse events. Patients who are either found to be ineligible or refuse to start treatment after consenting will not be followed and will be replaced. Their information will not be collected. After 30 days after the last dose of anastrozole or letrozole, if there are no continuing adverse events attributable to treatment, patients will be off study.

Interventional
Not Provided
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Breast Cancer
  • Drug: Anastrozole
    1 mg daily
    Other Name: Arimidex
  • Drug: Letrozole
    2.5 mg daily
    Other Name: Femara
  • Active Comparator: Cohort 1: Normal Weight Anastrozole
    Cohort 1: Patients with BMI < 25.0 kg/m2 treated with anastrozole
    Intervention: Drug: Anastrozole
  • Active Comparator: Cohort 2: Overweight Anastrozole
    Cohort 2: Patients with BMI ≥ 25.0-29.9 kg/m2 treated with anastrozole
    Intervention: Drug: Anastrozole
  • Active Comparator: Cohort 3: Obese
    Cohort 3: Patients with BMI ≥ 30 kg/m2 treated with anastrozole
    Intervention: Drug: Anastrozole
  • Active Comparator: Cohort 4: Normal Weight Letrozole
    Cohort 4: Patients with BMI < 25.0 kg/m2 treating with letrozole
    Intervention: Drug: Letrozole
  • Active Comparator: Cohort 5: Overweight Letrozole
    Cohort 5: Patients with BMI ≥ 25.0-29.9 kg/m2 treating with letrozole
    Intervention: Drug: Letrozole
  • Active Comparator: Cohort 6: Obese Letrozole
    Cohort 6: Patients with BMI ≥ 30 kg/m2 treating with letrozole
    Intervention: Drug: Letrozole
Not Provided

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Recruiting
90
March 2019
March 2018   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  1. Female greater than or equal to 18 years.
  2. Postmenopausal status, defined by no menstrual cycle for 12 months or surgical removal of ovaries.
  3. Histologically confirmed adenocarcinoma of the breast.
  4. Evidence of hormone sensitive, ER rich primary tumor defined by an Allred score of ≥6.
  5. Human estrogen receptor -2 (HER2) negative in the primary tumor tissue as defined by:

    1. Grade 0 or 1+ staining intensity (on a scale of 0 to 3) by means of IHC analysis OR
    2. Grade 2+ staining intensity by means of immuno-histochemical (IHC) analysis with gene amplification on fluorescence in situ hybridization (FISH) < 2.0 OR
    3. Gene amplification on fluorescence in situ hybridization (FISH) < 2.0.
  6. Eastern Cooperative Oncology Group (ECOG) performance status ≤ 3
  7. Unresected operable breast cancer stage I-III with primary tumor ≥ 2.0 cm.
  8. Ability to understand and the willingness to sign a written informed consent document.
  9. Patients must not have received any prior chemotherapy, radiation therapy, or endocrine therapy for their current breast cancer. Patients who received tamoxifen or raloxifene or another agent for prevention of breast cancer may be included as long as the patient has discontinued the treatment at least one month prior to baseline study biopsy.
  10. Patients must have an adequate tumor tissue sample prior to enrollment available for correlative studies as defined below: Core needle biopsy or incisional biopsy samples that can provide ≥ 5 unstained sections of 5 micron thickness. Fine needle aspiration (FNA) sample alone is not sufficient.
  11. Patients must have adequate organ function as defined below:

    1. Total bilirubin within normal institutional limits
    2. aspartate aminotransferase (AST)(SGOT)/alanine aminotransferase (ALT)(SGPT) < 2.5 x institutional upper limit of normal
    3. Creatinine clearance ≥ 10 mL/min/1.73 m2

Exclusion Criteria:

  1. Previous or current systemic malignancy within the past 3 years other than breast cancer or adequately treated cervical carcinoma in situ or basal/squamous carcinoma of the skin.
  2. Patients may not be receiving any other investigational agent.
  3. History of allergic reactions or hypersensitivity to compounds of similar chemical or biologic composition to anastrozole or letrozole.
Sexes Eligible for Study: Female
18 Years and older   (Adult, Senior)
No
Contact: Emily C Bellavance, MD 410-328-7320 ebellavance@som.umaryland.edu
United States
 
 
NCT02095184
HP-00060250
Yes
Not Provided
Not Provided
Emily Bellavance, University of Maryland
University of Maryland
Not Provided
Principal Investigator: Emily C Bellavance, M.D. University of Maryland
University of Maryland
September 2017

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP