Vitamin D in Postmenopausal Women at High Risk for Breast Cancer

Breast Cancer Clinical Trial

Official title:

Effects of High-Dose Vitamin D on Circulating Vitamin D Levels and Breast Density in Postmenopausal Women at High Risk for Breast Cancer Development

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00859651
• Other study ID #: AAAD3638
• Status: Completed
• Phase: Phase 2
• First received: March 9, 2009
• Last updated: August 30, 2017
• Start date: June 2009
• Est. completion date: April 2015

Study information

• Verified date: August 2017
• Source: Columbia University
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

This is a phase II study which will enroll 20 postmenopausal women who are at high risk for breast cancer development. The goal is to determine whether a one-year intervention of high-dose vitamin D at 2 different doses (20,000 IU weekly or 30,000 IU weekly) will increase circulating blood levels of vitamin D and to obtain preliminary data on the biologic effects of vitamin D for breast cancer prevention.

Description:

Participants will receive oral vitamin D3, cholecalciferol 20,000 IU or 30,000 IU weekly. Before beginning the intervention, the participants will have a general physical exam including a clinical breast exam and anthropometric measures, a morning blood draw (for analysis of 25(OH)D, 1,25(OH)D, parathyroid hormone (PTH), insulin-like growth factor (IGF)-I, insulin-like growth factor-binding protein 3 (IGFBP-3), estradiol, estrone, testosterone, and sex hormone-binding globulin (SHBG) at baseline, 6 months, and 12 months) and a bilateral mammogram (at baseline and 12 months). Participants will also complete a baseline questionnaire, collecting data on demographic information and breast cancer risk factors. In addition, we will be collecting data on vitamin D sources from diet and sunlight exposure using a validated questionnaire administered at baseline and 12 months.

For follow-up visits, the participant will be seen at the study site at months 3, 6, 9, and

12. During these visits, drug will be dispensed, adherence ascertained, and adverse events will also be assessed. In addition, blood (serum calcium, albumin, creatinine) and urine (urine calcium, creatinine) will be collected to monitor for toxicity. A 24-hour urine collection will be conducted at baseline and 12 months to assess for hypercalciuria. After the 1 year intervention, all participants will have a complete physical exam including clinical breast exam, a bilateral mammogram, blood draw, and complete a follow-up questionnaire.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 20
• Est. completion date: April 2015
• Est. primary completion date: April 2015
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Female
• Age group: 21 Years and older

Eligibility

Inclusion Criteria:

• Elevated risk of breast cancer defined as having at least one of the following: (1) Predicted 5-year modified Gail model risk of 1.67% or greater, (2) Lobular carcinoma in situ, (3) Known BRCA1 or BRCA2 deleterious mutation carrier, (4) Prior history of ductal carcinoma in situ, if no current tamoxifen use or prior radiation to the contralateral breast.

• Age 21 years or older.

• Postmenopausal defined as > 6 months since the last menstrual period, prior bilateral oophorectomy, or serum follicle-stimulating hormone (FSH)/luteinizing hormone (LH) values consistent with institutional normal values for the postmenopausal state.

• Baseline mammographic density =25% as assessed qualitatively by the mammographer (25-50% = "scattered fibroglandular densities"; >50-75% = "heterogeneously dense breasts"; >75% = "extremely dense breasts").

• Baseline serum 25-hydroxyvitamin D <32 ng/ml.

• Normal breast exam and mammogram (Breast Imaging Reporting and Data System (BIRADS) score of 1 or 2) or abnormal breast imaging with a benign breast biopsy without evidence of cancer. Normal baseline breast magnetic resonance imaging (MRI) (BIRADS score of 1, 2, or 3).

• Prior tamoxifen or raloxifene use is allowed provided treatment is discontinued at least 28 days prior to enrollment.

• At least one breast available for imaging. No bilateral breast implants.

• Willingness to not take vitamin D supplements during the one year intervention, but up to 1000mg of calcium supplementation is allowed.

• Normal serum calcium.

• Adequate renal and hepatic function: serum creatinine, bilirubin, aspartate aminotransferase (AST), alanine aminotransferase (ALT) and alkaline phosphatase < 2.0 x the institutional upper limit of normal (IULN).

• Performance status of 0 or 1.

Exclusion Criteria:

• Other prior malignancy. The following is allowed: adequately treated basal cell or squamous cell skin cancer, in situ cervical cancer, adequately treated stage I or II cancer from which the participant is currently in complete remission, or any other cancer (including breast cancer) for which the participant has been disease-free for 5 years.

• History of kidney stones.

• Hypersensitivity reactions to vitamin D.

• On estrogen replacement therapy.

• Significant medical or psychiatric condition that would preclude study completion.

Related Conditions & MeSH terms

• Breast Cancer
• Breast Neoplasms

Intervention

Drug:
• Cholecalciferol
Cholecalciferol is a vitamin D3. Vitamin D is important for the absorption of calcium from the stomach and for the functioning of calcium in the body. Cholecalciferol is used to treat or prevent many conditions caused by a lack of vitamin D. Cholecalciferol will be available in gel capsule form at 10,000 IU (0.25 mg cholecalciferol) each.
• Placebo capsule
Matching placebo capsules

Locations

Country	Name	City	State
United States	Columbia University	New York	New York

Sponsors (2)

Lead Sponsor	Collaborator
Columbia University	Avon Foundation

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Change in Serum 25(OH)D	25(OH)D level at the end of one year intervention	Baseline to 1 year
Secondary	Change in Percent Density	Assessed by mammography and breast MRI.	Baseline to 1 year