Extended Endocrine Therapy for Premenopausal Women With Breast Cancer
| Status: | Completed |
|---|---|
| Conditions: | Breast Cancer, Cancer |
| Therapuetic Areas: | Oncology |
| Healthy: | No |
| Age Range: | 18 - Any |
| Updated: | 4/21/2016 |
| Start Date: | May 2009 |
| End Date: | September 2014 |
The purpose of this study is to determine the safety and tolerability of the combination of
two drugs (letrozole and leuprolide) in women who have already taken tamoxifen for at least
4.5 years. Letrozole, an aromatase inhibitor (which blocks an enzyme that produces
estrogen), is a drug that is FDA approved. It has been shown to reduce the risk of breast
cancer recurrence in postmenopausal women with breast cancer who have been previously
treated with tamoxifen. Letrozole works by stopping the production of estrogen in parts of
the body other than the ovaries. Leuprolide is a drug that stops a women's ovarian cycles.
This process is known as ovarian function suppression. Stopping a women's menstrual cycle
may be effective against breast cancer for some patients when given as initial therapy. The
combination of letrozole and leuprolide is considered a standard treatment for women with
metastatic breast cancer, and is also sometimes used for treatment of premenopausal early
stage breast cancer, but it has not been accepted as a standard of care treatment.
two drugs (letrozole and leuprolide) in women who have already taken tamoxifen for at least
4.5 years. Letrozole, an aromatase inhibitor (which blocks an enzyme that produces
estrogen), is a drug that is FDA approved. It has been shown to reduce the risk of breast
cancer recurrence in postmenopausal women with breast cancer who have been previously
treated with tamoxifen. Letrozole works by stopping the production of estrogen in parts of
the body other than the ovaries. Leuprolide is a drug that stops a women's ovarian cycles.
This process is known as ovarian function suppression. Stopping a women's menstrual cycle
may be effective against breast cancer for some patients when given as initial therapy. The
combination of letrozole and leuprolide is considered a standard treatment for women with
metastatic breast cancer, and is also sometimes used for treatment of premenopausal early
stage breast cancer, but it has not been accepted as a standard of care treatment.
- Participants will be given a monthly intramuscular injection of leuprolide. Six to
eight weeks after the first leuprolide injection, participants will be instructed to
begin taking letrozole pills by mouth at home each day.
- During this research study, participants will also be offered injections of zoledronic
acid to preserve bone mineral density. If desire, these injections will be given every
6 months for a total of 4 injections during the course of the research study.
- The treatments in this research study may increase the risk of bone density loss, so
vitamin D and calcium supplements will be recommended to participants.
- The following tests and procedures will be performed during the research study:
Physical Exam (every visit); Blood tests; Urine test (beginning and end of treatment);
Imaging (annual mammograms); Bone Density (DXA) Scan (beginning and end of treatment);
Questionnaires (throughout the study).
- Participants will be on this study for about two years.
eight weeks after the first leuprolide injection, participants will be instructed to
begin taking letrozole pills by mouth at home each day.
- During this research study, participants will also be offered injections of zoledronic
acid to preserve bone mineral density. If desire, these injections will be given every
6 months for a total of 4 injections during the course of the research study.
- The treatments in this research study may increase the risk of bone density loss, so
vitamin D and calcium supplements will be recommended to participants.
- The following tests and procedures will be performed during the research study:
Physical Exam (every visit); Blood tests; Urine test (beginning and end of treatment);
Imaging (annual mammograms); Bone Density (DXA) Scan (beginning and end of treatment);
Questionnaires (throughout the study).
- Participants will be on this study for about two years.
Inclusion Criteria:
- Women 18 years of age or older
- History of invasive ER+ or PR+ breast cancer treated with at least 4.5 years of
tamoxifen
- No current evidence of recurrent invasive disease or metastatic disease. Patients may
have a history of bilateral breast cancer
- Premenopausal (estradiol level in premenopausal range, >20pg/ml, within the prior 28
days)
- Liver function tests and creatinine <2.5 times the upper limit of normal within the
28 days prior to enrollment
- ECOG Performance Status 0-1
- Must agree to use non-hormonal contraception (condoms, diaphragm, IUD, sterilization,
abstinence, etc) and no other hormonal therapy during trial and until 3 months after
letrozole is stopped
- Negative pregnancy test within 14 days prior to enrollment
- Patient must be able to speak, read and write in English
Exclusion Criteria:
- Previous treatment with an oral or IV bisphosphonate in the prior two years
- History of cancer other than breast cancer within 5 years excluding basal/squamous
cell skin carcinoma in situ of the cervix
- Women with evidence of current local recurrence or metastatic breast cancer
- Pregnant women
- Nursing women
- Women who are currently taking tamoxifen and are unwilling to stop this medication
- Women with a known deleterious BRCA 1 or BRCA 2 mutation
We found this trial at
4
sites
Beth Israel Deaconess Medical Center Beth Israel Deaconess Medical Center (BIDMC) is one of the...
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Dana-Farber Cancer Institute Since it’s founding in 1947, Dana-Farber has been committed to providing adults...
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Newton-Wellesley Hospital A comprehensive medical center located right in Newton on Washington Street, Newton-Wellesley Hospital...
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