Combined Estrogen Blockade of the Breast With Exemestane and Raloxifene in Postmenopausal Women With a History of Breast Cancer Who Have No Clinical Evidence of Disease

• Status: Completed
• Trial end date: 2008-08-01
• Target enrollment: 0
• Participant gender: Female

Summary

The purpose of this research study is to learn about the effects of two drugs when they are given together. The names of the drugs are raloxifene and exemestane.

Raloxifene is a drug that is related to estrogen. In the liver and bone, it acts like estrogen. In the breast and uterus it acts like an anti-estrogen. It has been used in postmenopausal women to prevent a disease called osteoporosis. This is a disease that decreases bone strength over many years and may finally lead to bone fractures. In a group of women who were taking the drug, it also seemed to decrease the chances of breast cancer and possibly endometrial cancer (cancer of the uterus). Therefore, we want to study it further to see if it prevents breast cancer. We also want to find out if it may be even better in preventing breast cancer if it is given with another drug.

The other drug in this trial is exemestane. Exemestane is a type of drug that works to decrease estrogen levels in postmenopausal women. This type of drug is used in women for the treatment of breast cancer. Before we can decide if the two drugs combined are better for preventing breast cancer, we must first test these drugs together to make sure that they are safe. This safety testing is the purpose of this trial.

• Phase: N/A
• Accepts Healthy Volunteers?: No

Details

• Lead Sponsor: Memorial Sloan Kettering Cancer Center
• Collaborator: Pharmacia
• Treatments: Estrogens; Exemestane; Raloxifene Hydrochloride

Criteria

Inclusion Criteria:

• Postmenopausal women with a history of AJCC Stage 0, I, II or III breast cancer, with no clinical evidence of disease, after completion of all planned adjuvant therapy. Patients must not have received anti-estrogen therapy as part of their adjuvant treatment. Patients with a history of invasive ER- and/or PR-positive breast cancer are eligible only if they have not received an anti-estrogen as part of adjuvant therapy, and they are at least 2 years from the time of their primary surgery.

• Patients must have completed all planned adjuvant therapy, including surgery, chemotherapy, and radiation therapy, at least 4 weeks prior to treatment. There is no limit as to the amount of time that may have passed since completion of adjuvant therapy and initiation of treatment.

• Patients must be postmenopausal, as defined by either:

1. No spontaneous menses for at least 5 years; women who have had a hysterectomy in this group, but have intact ovaries must have luteinizing hormone (LH) and follicle-stimulating hormone (FSH) levels within the postmenopausal range

2. Spontaneous menses within the past 5 years, but amenorrheic (e.g. spontaneous or secondary to chemotherapy, radiation therapy or hysterectomy) for at least 12 months, and luteinizing hormone (LH) and follicle-stimulating hormone (FSH) levels within the postmenopausal range

3. Bilateral oophorectomy

• Patients must have a history of breast cancer confirmed by the Department of Pathology at Memorial Sloan-Kettering Cancer Center.

• Patients must be at least 18 years old, and must be able to give written informed consent.

• Karnofsky performance status > 80%.

• Laboratory parameters:

WBC =>3.0 x 106 cells/ml serum bilirubin <= 1.5 mg/dl serum creatinine <= 1.5 mg/dl serum AST (SGOT) <= 2x upper institutional normal CEA and CA15-3 within institutional normal limits

Exclusion Criteria:

• Prior history of bilateral mastectomy.

• Prior history of ovarian or endometrial cancer.

• Prior or current history of osteoporosis, as defined by a lumbar-spine bone mineral density < 2.5 SD below the mean value for normal premenopausal women.

• Use of bisphosphonates or calcitonin within the past 3 months.

• Prior history of venous thrombosis or pulmonary embolism.

• Patients with unstable angina or New York Heart Association Class III or IV heart disease.

• Prior hormonal therapy within the past 3 months.