PET Scans in Assessing Response To Treatment in Patients Receiving Hormone Therapy or Trastuzumab for Breast Cancer

Completed

• Conditions: Breast Cancer

• Registration Number: NCT00362973
• Lead Sponsor: University of Washington

Brief Summary

RATIONALE: Diagnostic procedures, such as PET scans, may help in learning how well hormone therapy and trastuzumab work to kill breast cancer cells and allow doctors to plan better treatment.

PURPOSE: This clinical trial is studying how well PET scans work in assessing response to treatment in patients receiving hormone therapy or trastuzumab for breast cancer.

Detailed Description

OBJECTIVES:

* Correlate the percent change in fludeoxyglucose F 18 (FDG)-positron emission tomography (PET) standardized uptake value (SUV) and percent change in cell proliferation (as assessed by tumor biopsy) during hormonal therapy with tumor response in patients with hormone receptor-positive (estrogen receptor or progesterone receptor) breast cancer.

* Correlate the percent change in FDG-PET SUV and percent change in cell proliferation (as assessed by tumor biopsy) during treatment with trastuzumab (Herceptin®) with tumor response in patients with HER-2/neu-positive breast cancer.

* Compare the association between two-week changes in cell proliferation rate (as measured by FDG-PET and biopsy) in patients treated with an aromatase inhibitor or trastuzumab.

OUTLINE: Patients are assigned to 1 of 2 groups according to therapy.

* Group 1 (patients receiving hormonal therapy): Patients undergo fludeoxyglucose F 18-positron emission tomography (FDG-PET) scan and may also undergo 16α-fluoroestradiol F 18 (FES)-PET scan at baseline (prior to beginning therapy) and FDG-PET scan 2 weeks after beginning therapy.

Blood samples are collected at baseline and at 3 and 6 months after beginning aromatase inhibitor therapy. The blood samples are examined for hormone levels, including estradiol, estrone, testosterone, follicle-stimulating hormone, and sex hormone-binding globulin.

* Group 2 (patients receiving HER-2/neu targeted therapy): Patients undergo biopsy and FDG-PET scan at baseline (prior to beginning therapy) and FDG-PET scan 1-2 weeks after beginning therapy.

Some patients undergo a core-needle biopsy 2 weeks after beginning therapy. Biopsies are assessed for the following markers: proliferative rate (Ki67), estrogen receptor, progesterone receptor, HER-2/neu, epidermal growth factor receptor, androgen receptor, and topoisomerase II.

After completion of study therapy, patients are followed periodically for 6 months.

PROJECTED ACCRUAL: A total of 40 patients will be accrued for this study.

Study Timeline

• Study Start: 2006-05
• Study First Submitted: 2006-08-10
• Study First Submitted QC: 2006-08-10
• Study First Posted: 2006-08-15
• Primary Completion: 2009-11
• Status Verified: 2013-05
• Last Update Submitted: 2016-12-23
• Last Update Posted: 2016-12-28

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 42

Inclusion Criteria

Not provided

Exclusion Criteria

Not provided

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Correlation of early FDG-PET with response prediction	6 months
Percent change in fludeoxyglucose F 18-positron emission tomography (FDG-PET) standardized uptake value and change in markers of proliferation (Ki67) at 2 weeks	2 weeks
Percent change in cell proliferation correlated with absolute measures of FDG-PET	2 weeks

Trial Locations

Locations (2)

Seattle Cancer Care Alliance; 🇺🇸 Seattle, Washington, United States

Fred Hutchinson Cancer Research Center/University of Washington Cancer Consortium; 🇺🇸 Seattle, Washington, United States