“…Upon ligand binding, VDR heterodimerize with RXR or RAR, and regulate the transcription of more than a hundred genes, involved not only in calcium and phosphate homeostasis but also in cell proliferation, differentiation, and apoptosis (Chung et al 2009). Accumulating results revealed the association between vitamin D deficiency and vitamin D-related genes with different cancer types, including breast, prostate, colorectal, oral, lung cancer, melanoma and acute myeloid leukemia (Feldman et al 2014;Davis and Milner 2011;Zeljic et al 2012, Puccetti et al 2002. In addition, the gene expression of VDR and CYP24A1 gene, coding for 24-hydroxylase, enzyme involved in the vitamin D catabolism, and CYP27B1, coding for 1α-hydroxylase, involved in anabolism, is mediated by epigenetic modifications (Hobaus et al 2013;Fetahu et al 2014).…”