Trial Search Results

Pilot Trial to Evaluate the Effect of Vitamin D on Melanocyte Biomarkers

The purpose of this study is to determine the signaling pathways and changes in gene expression in melanocytes of subjects with a history of non-melanoma skin cancer who are exposed to oral vitamin D. If vitamin D is found to inhibit a signaling pathway involved in the development of melanoma such as BRAF, a protein involved in cell proliferation, then oral vitamin D could be explored further as a chemoprevention for melanoma skin cancer.

Stanford is currently not accepting patients for this trial.

Lead Sponsor:

Stanford University

Collaborator: National Institutes of Health (NIH)

Stanford Investigator(s):


  • Drug: Vitamin D3
  • Drug: placebo and vitamin D




Inclusion Criteria:

   1. Age 18 - 75

   2. Female

   3. White race/ethnicity

   4. With history of non-melanoma skin cancer

   5. Has 12-16 moles upon skin examination

   6. Consents to 6-12 moles biopsies over 2-3 clinic visits (2-4 months)

   7. Consents to ingesting oral vitamin D3 or placebo daily for 2-4 months

   8. Consents to abstaining from other multivitamins during study

   9. Consents to research use of their tissue and blood samples

10. Agrees to apply a sunscreen of SPF 45 during study -

Exclusion Criteria:

   1. History or current evidence of hyperparathyroidism, hypercalcemia, renal calculi, or
   other renal disease.

   2. History or current evidence of malabsorptive illnesses, such as IBD, or liver disease
   that would impair uptake or metabolism of vitamin D.

   3. History or current evidence of hyperthyroidism that would increase metabolism of
   vitamin D.

   4. History or current evidence of immunosuppression (cancer, autoimmune disease) or
   taking immunosuppressive drugs.

   5. Currently taking medications that would affect metabolism of vitamin D
   (anticonvulsants, corticosteroids, H2-receptor antagonists).

   6. Currently taking medications that predispose to hypercalcemia (digoxin, lithium,
   thiazide diuretics) or other electrolyte disturbances (aluminum hydroxide)

   7. Pregnancy

Ages Eligible for Study

18 Years - 75 Years

Genders Eligible for Study


Not currently accepting new patients for this trial

Contact Information

Stanford University
School of Medicine
300 Pasteur Drive
Stanford, CA 94305