Vitamin D receptor polymorphism and prostate cancer prognosis

Prostatic epithelial cells synthesize the active form of vitamin D (1,25-dihydroxyvitamin D ), which participates in regulating prostate growth. Calcitriol, a synthetic form of vitamin D , exhibits antiproliferative and prodifferentiation activities in prostate cancer. The function of 1,25-dihydroxyvitamin D is mediated by its binding to vitamin D receptor (VDR). VDR forms a heterodimer, typically with retinoid X receptor, to regulate vitamin D target genes. We evaluated the relationship between polymorphism and clinical characteristics associated with prostate cancer risk and prognosis among Egyptian men. This case-control study included 2 groups of patients: group A, a control group of 50 subjects with benign prostate hyperplasia, and group B, 50 subjects newly diagnosed with prostate cancer. All participants performed complete blood count, liver and kidney function tests, prostate specific antigen measurement, histopathological analysis and immunohistochemistry for Dickkopf Homolog 3. Restriction fragment length polymorphism-polymerase chain reaction as performed to detect polymorphism. Patients with prostate cancer and controls showed a significantly different genotype frequency ( = 0.007). Furthermore, prostate-specific antigen levels were significantly different in different genotypes in patients with prostate cancer ( < 0.001). Finally, T stage and the polymorphism were significantly associated ( < 0.041). The polymorphism may be a diagnostic and prognostic marker for prostate cancer in Egyptian men.