Effect of Tamoxifen or an Aromatase Inhibitor on Estrogen Metabolism in Women Treated for Newly Diagnosed Breast Cancer
- Conditions
- Breast Cancer
- Registration Number
- NCT00569543
- Lead Sponsor
- University of Nebraska
- Brief Summary
RATIONALE: Studying samples of urine in the laboratory from women with breast cancer may help doctors learn whether tamoxifen and aromatase inhibitors alter the metabolism of estrogens.
PURPOSE: This clinical trial is studying the effect of tamoxifen or an aromatase inhibitor on estrogen metabolism in women undergoing treatment for newly diagnosed breast cancer.
- Detailed Description
OBJECTIVES:
* Learn the effects of selected chemotherapy agents on the profile of estrogen metabolites, glutathione conjugates, and depurinating DNA adducts in urine from women with breast cancer.
* Determine whether tamoxifen citrate or aromatase inhibitor alters the metabolism of estrogens.
OUTLINE: Patients are stratified according to planned therapy (tamoxifen citrate vs aromatase inhibitor).
Patients receive tamoxifen citrate or an aromatase inhibitor as planned. Urine samples (and nipple aspirate fluid, if possible) are collected before beginning treatment and after 2-6 months of treatment. Samples are analyzed for 40 estrogen metabolites, conjugates, and depurinating DNA adducts by ultraperformance liquid chromatography with tandem mass spectrometric detection.
Patients' information, including race, body mass index, age at menarche, menopausal status, age at menopause if applicable, smoking history, alcohol consumption, pregnancy history including age at each pregnancy, lactation, history of benign breast disease, hysterectomy, and disease type, is collected through medical record review.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- Female
- Target Recruitment
- 27
- Newly diagnosed ductal carcinoma in situ or invasive breast cancer
- Scheduled to receive tamoxifen citrate or an aromatase inhibitor
- Estrogen receptor or progesterone receptor positive
- ECOG performance status 0, 1, or 2
- Not pregnant or nursing
- No prior antiestrogen drug such as tamoxifen citrate or raloxifene
- No concurrent estrogens
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method Comparison of estrogen compounds in urine before and after treatment for two-to-six months Comparison of estrogen compounds in urine before and after treatment with tamoxifen or an aromatase inhibitor for two-to-six months
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (2)
Mayo Clinic Cancer Center
🇺🇸Rochester, Minnesota, United States
Eppley Cancer Center at University of Nebraska Medical Center
🇺🇸Omaha, Nebraska, United States