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Analyzing a New Mechanism in Response to Tamoxifen Therapy in Breast Cancer Patients

This study has been completed.
National Institutes of Health (NIH)
National Cancer Institute (NCI)
Information provided by (Responsible Party):
Roswell Park Cancer Institute Identifier:
First received: December 4, 2009
Last updated: February 7, 2017
Last verified: February 2017

December 4, 2009
February 7, 2017
December 14, 2009
December 2015   (Final data collection date for primary outcome measure)
Investigate the status of ERά-p53 interaction in ERά-positive, p53-wild type breast tumors in untreated patients and examine how tamoxifen therapy modifies this reaction [ Time Frame: 2 years ]
Same as current
Complete list of historical versions of study NCT01027416 on Archive Site
Confirm the wild type status of p53 and analyze the functional status of p53 pathway by monitoring expression of selected p53-target genes in tumors in patients who have or have not been treated with tamoxifen [ Time Frame: 2 years ]
Same as current
Not Provided
Not Provided
Analyzing a New Mechanism in Response to Tamoxifen Therapy in Breast Cancer Patients
Pilot Study to Analyze a Novel Mechanism Underlying Response to Tamoxifen Therapy in Breast Cancer Patients
This study will help to understand the interaction between the hormonal therapy Tamoxifen, estrogen receptors and certain genes in the cancer cell. This information may eventually help select the appropriate therapy for future patients with similar cancer.

Women with abnormal mammogram or suspicious masses will undergo diagnostic core biopsies which will be analyzed for ER/PR and HER2Neu expression. For patients that are ER positive, P53 staining will be done.

Women presenting tumors with an Allred score of 3 or greater status will be approached to participate.

Women will be randomized to either standard of care surgical therapy or a 4 week intervention of Tamoxifen 20mg daily for 4 weeks prior to surgery. During the intervention, blood draws will be done to measure levels of tamoxifen metabolites in the blood and test for polymorphisms that may decrease levels of active metabolites.

Women will undergo two blood draws for PK/PD and one for pharmacogenomics.

Not Provided
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: No masking
Primary Purpose: Treatment
Breast Cancer
Drug: Tamoxifen
Drug: Tamoxifen 20 mg orally 1x/day for 4 weeks
  • No Intervention: No Intervention
  • Active Comparator: Tamoxifen
    Tamoxifen 20 mg orally 1x/day for 4 weeks
    Intervention: Drug: Tamoxifen
Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
December 2015
December 2015   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • The patient must consent to be in the study and must have signed an approved consent form conforming to institutional guidelines
  • The patient must be 18 years or older
  • Core biopsy should definitively demonstrate invasive carcinoma
  • Invasive carcinoma should be ERά receptor positive
  • The tumor should be approximately 1 cm, but at least 5mm to account for variability in imaging and imaging occult disease(physical exam, mammography, ultrasound).
  • Patients in whom surgical excision of the tumor is part of standard of care management
  • ECOG of 0 or 1
  • Negative serum or urine β-hCG pregnancy test at screening for patients of child-bearing potential(this is routinely done if premenopausal and having surgery)
  • Consent to participate in DBBR

Exclusion Criteria:

  • Male patients are not eligible for this study
  • Female patients with inoperable tumor and patients undergoing neo-adjuvant chemotherapy
  • Patients with diagnosis by FNA cytology
  • Pregnant or lactating women
  • Prior therapy for breast cancer, including irradiation, chemo-, immuno- and/or hormonal therapy
  • Patients receiving any hormonal therapy, e.g., birth-control pills, ovarian hormonal replacement therapy, infertility medications, etc. are not eligible
  • Nonmalignant systemic disease (cardiovascular, renal, hepatic, etc.) that would preclude the patients from being subjected to surgical excision
  • Psychiatric or addictive disorders that would preclude obtaining informed consent
  • Patients known or suspected to have hypercoagulable syndrome or history of venous or arterial thrombosis, stroke, TIA, or pulmonary embolism
  • Women who are post-menopausal defined as no menses for at least 12 months
  • Women on selective serotonin reuptake inhibitors (SSRI) SSRI inhibits metabolism of tamoxifen
  • Women with non-invasive disease or microinvasion are not eligible
  • Women undergoing neoadjuvant chemotherapy are not eligible
  • Women currently on tamoxifen for prevention are not eligible
  • Patients shall not receive any herbal/alternative therapies such as flaxseed or soy products or black cohosh.
  • Patients with a known mutation in p53 (Li Fraumeni Syndrome)
Sexes Eligible for Study: Female
18 Years and older   (Adult, Senior)
Contact information is only displayed when the study is recruiting subjects
United States
RPCI I 110907
R21CA137635-01A1 ( US NIH Grant/Contract Award Number )
Not Provided
Not Provided
Not Provided
Roswell Park Cancer Institute
Roswell Park Cancer Institute
  • National Institutes of Health (NIH)
  • National Cancer Institute (NCI)
Principal Investigator: Gokul Das, MD Roswell Park Cancer Institute
Roswell Park Cancer Institute
February 2017

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