Vitamin D, calcium, and breast cancer risk: A review

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Abstract

Vitamin D and calcium are metabolically interrelated and highly correlated dietary factors. Experimental studies have shown their anticarcinogenic effects due to their participation in regulating cell proliferation, differentiation, and apoptosis in normal and malignant breast cells. Given the emerging interest in their potential roles in the etiology of breast cancer, we review the current epidemiologic literature on dietary and/or supplemental intakes of vitamin D, endogenous circulating levels of vitamin D, and dietary and/or supplemental intakes of calcium in relation to breast cancer risk. To place these studies in context, we also provide a brief review of other supporting epidemiologic evidence. Despite inconsistent results from the epidemiologic studies, several lines of evidence suggest that vitamin D and calcium may be involved in the development of breast cancer. Specifically, (a) there is some epidemiologic evidence for inverse associations between vitamin D and calcium intakes and breast cancer; (b) serum, plasma, and/or blood levels of vitamin D metabolites have been inversely associated with breast cancer risk in some studies; (c) high sunlight exposure, presumably reflecting vitamin D synthesis in the skin, has been associated with a reduced risk of breast cancer; (d) vitamin D and calcium intakes have been inversely related to breast density, an intermediate end point for breast cancer; (e) calcium has been associated with a reduced risk of benign proliferative epithelial disorders of the breast, putative precursors of breast cancer; and (f) certain polymorphisms of the vitamin D receptor might modify breast cancer susceptibility. To further confirm the potential protective effects of calcium and vitamin D on breast cancer, well-designed cohort studies and clinical trials are warranted.

Original languageEnglish (US)
Pages (from-to)1427-1437
Number of pages11
JournalCancer Epidemiology Biomarkers and Prevention
Volume15
Issue number8
DOIs
StatePublished - Aug 2006

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Vitamin D
Breast Neoplasms
Calcium
Breast
Anticarcinogenic Agents
Calcitriol Receptors
Sunlight
Epidemiologic Studies
Cell Differentiation
Cohort Studies
Cell Proliferation
Clinical Trials
Apoptosis
Skin
Serum

ASJC Scopus subject areas

  • Epidemiology
  • Oncology

Cite this

Vitamin D, calcium, and breast cancer risk : A review. / Cui, Yan; Rohan, Thomas E.

In: Cancer Epidemiology Biomarkers and Prevention, Vol. 15, No. 8, 08.2006, p. 1427-1437.

Research output: Contribution to journalArticle

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