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The relevance of vitamin D receptor (VDR) gene polymorphisms for cancer: a review of the literature. Köstner K, Denzer N, Müller CS, Klein R, Tilgen W, Reichrath J. Anticancer Res. 2009 Sep;29(9):3511-36. Review. PMID: 19667145 CONCLUSION: Significant associations with VDR polymorphisms have been reported in cancer of the breast (Fok1, Bsm1, Taq1, Apa1, poly (A)), prostate (Fok1, Bsm1, Taq1, poly (A)), skin (Fok1, Bsm1, A-1210), colorectum (Fok1, Bsm1), ovary (Fok1, Apa1) and bladder (Fok1), and in renal cell carcinoma (Taq1, Apa1). However, conflicting data have been reported for most malignancies. After careful evaluation of the actual literature, it can be summarized that data indicating an association of VDR polymorphisms and cancer risk are strongest for breast cancer (Bsm1, Fok1), prostate cancer (Fok1) and malignant melanoma (MM) (Fok1). Data indicating an association of VDR polymorphisms and cancer prognosis are strongest for prostate cancer (Fok1), breast cancer (Bsm1, Taq1), MM (Bsm1) and renal cell carcinoma (Taq1).

Fish, vitamin D, and flavonoids in relation to renal cell cancer among smokers. Wilson RT, Wang J, Chinchilli V, Richie JP, Virtamo J, Moore LE, Albanes D. Am J Epidemiol. 2009 Sep 15;170(6):717-29. Epub 2009 Aug 3. PMID: 19651663 doi:10.1093/aje/kwp178 These results suggest that the flavonoid quercetin may prevent renal cell cancer among male smokers. The possible risk associated with fish intake warrants further investigation before conclusions may be drawn.