Effect of Tamoxifen or an Aromatase Inhibitor on Estrogen Metabolism in Women Undergoing Treatment for Newly Diagnosed Breast Cancer
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|ClinicalTrials.gov Identifier: NCT00569543|
Recruitment Status : Completed
First Posted : December 7, 2007
Last Update Posted : May 15, 2013
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.
|Condition or disease||Intervention/treatment|
|Breast Cancer||Other: high performance liquid chromatography Other: laboratory biomarker analysis Other: mass spectrometry Other: medical chart review|
- 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.
|Study Type :||Observational|
|Actual Enrollment :||27 participants|
|Official Title:||Effects of Therapeutic Agents on Estrogens in the Breast|
|Study Start Date :||May 2005|
|Actual Primary Completion Date :||August 2012|
|Actual Study Completion Date :||August 2012|
- Other: high performance liquid chromatography
- Other: laboratory biomarker analysis
The biomarkers of interest will be the metabolites 4-OHE1(E2), estrogen-GSH conjugates and depurinating estrogen-DNA adducts.
- Other: mass spectrometry
The urine samples will be analyzed for 40 estrogen metabolites, conjugates and depurinating DNA adducts by UPLC with tandem mass spectrometric detection.
- Other: medical chart review
Collection of information about age, race, general health, any endocrine disorders, history of cancer, estrogen and progesterone receptor status, menopausal status and breast disease.
- Comparison of the estrogen compounds in urine [ Time Frame: before and after treatment with tamoxifen or an aromatase inhibitor for two-to-six months ]
Biospecimen Retention: Samples With DNA
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00569543
|United States, Minnesota|
|Mayo Clinic Cancer Center|
|Rochester, Minnesota, United States, 55905|
|United States, Nebraska|
|UNMC Eppley Cancer Center at the University of Nebraska Medical Center|
|Omaha, Nebraska, United States, 68198-6805|
|Principal Investigator:||Ercole Cavalieri, DSc||University of Nebraska|