A Phase I Prevention Study of Atorvastatin in Women at Increased Risk for Breast Cancer

A Phase I Prevention Study of Atorvastatin in Women at Increased Risk for Breast Cancer

Chemoprevention is the use of certain drugs to keep cancer from forming. The use of atorvastatin (Lipitor) may prevent breast cancer. This randomized phase I trial is studying the best dose of atorvastatin in preventing breast cancer in women at increased risk for breast cancer.

PRIMARY OBJECTIVES:

I. To determine the minimum biological effective dose (MBED) of atorvastatin required to induce modulation in the proliferation marker, Ki-67, in breast tissue of women who are at high risk to develop breast cancer. We will evaluate pre- and post atorvastatin treatment (4 dose levels) expression of Ki-67 in samples obtained via FNA from breast tissue of women at high risk for breast cancer. This specific aim tests the hypothesis that treatment with atorvastatin will induce a decrease in Ki-67.

SECONDARY OBJECTIVES:

I. To evaluate atorvastatin induced modulation of breast cancer biomarkers markers (EGFR, P-EGFR, ER, p21, p27, bcl-2, CC3, cytology) and drug related markers (LXR, total cholesterol, LDL, HDL, CRP) in women who are at high risk to develop breast cancer.

II. To determine plasma and tissue levels of atorvastatin and two of its hydroxylated metabolites (ohydroxyatorvastatin and p-hydroxyatorvastatin) in women who are treated with atorvastatin and to correlate these levels with Ki-67 levels. III. To correlate changes in Ki-67 and the above-described panel of biomarkers with HMG-CoA reductase genotype.

OUTLINE: Participants are randomized to 1 of 4 arms.

ARM I: Participants receive oral atorvastatin once daily for 3 months.

ARM II: Participants receive oral atorvastatin (at a higher dose than in arm I) once daily for 3 months.

ARM III: Participants receive oral atorvastatin (at a higher dose than in arm II) once daily for 3 months.

ARM IV: Participants do not receive treatment. Participants undergo blood sample collection and fine needle aspiration of breast tissue at baseline and at 3 months for correlative biomarker studies.

Inclusion Criteria:

• Women at increased risk for breast cancer, defined by one of the following:

  • 5 year projected Gail risk of greater than 1.67%
  • Previous diagnosis of atypical hyperplasia (AH) or lobular carcinoma in situ (LCIS) (per participating institution's pathology review), or ductal carcinoma in situ (participants could have received any type of surgery and radiation as long as they have an intact opposite breast)

• The participant must have been properly informed of the study and must sign an informed consent to be able to be enrolled in the study; the informed consent document must be signed, witnessed, and dated prior to start of the study

• Normal physical exam and bilateral mammogram that shows no evidence of suspicious, malignant disease, or uncharacterized lesions within last 12 months and no evidence of any active other cancer

• Eastern Cooperative Oncology Group (ECOG) performance status =< 1 (Karnofsky greater than or equal to 70%)

• Leukocytes greater than 3,000/uL

• Platelets greater than 100,000/uL

• Total bilirubin within normal institutional limits

• AST (SGOT)or /ALT (SGPT) =< 1.5 X institutional ULN

• Creatinine within normal institutional limits

• CPK, PTT, PT within normal institutional limits (up to 1 month prior to randomization)

• The effects of atorvastatin on the developing human fetus at the recommended therapeutic dose are unknown; for this reason, women of child-bearing potential must agree to use adequate contraception (barrier method of birth control (IUD); abstinence) prior to study entry and for the duration of study participation; should a woman become pregnant or suspect she is pregnant while participating in this study, she should inform her study physician immediately

Exclusion Criteria:

• Any type of active invasive cancer
• Bilateral mastectomy
• Use of oral contraceptives; androgens; luteinizing-hormone-releasing-hormone (LHRH) analogs, prolactin inhibitors, antiandrogens, tamoxifen, raloxifen, or aromatase inhibitors; women who discontinue these drugs at least 3 months prior to study enrollment will be eligible
• Chronic medical condition that requires regular use of statins or steroids (unless participants have discontinued these drugs 1 month prior to enrollment)
• Participants may not be receiving any other investigational agents
• History of allergic reactions attributed to compounds of similar chemical or biologic composition to atorvastatin
• Psychiatric condition, including history of clinical depression, or addictive disorder that would preclude obtaining informed consent or would interfere with compliance; uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements
• Pregnant women are excluded from this study because atorvastatin is a Class X agent with the potential for teratogenic or abortifacient effects; because there is an unknown but potential risk for adverse events in nursing infants secondary to treatment of the mother with atorvastatin breast feeding should be discontinued if the mother is treated with atorvastatin