The synergistic effect between adult weight changes and CYP24A1 polymorphisms is associated with pre- and postmenopausal breast cancer risk.

Purpose Vitamin D (VD) metabolism regulates adipose tissue, lipogenesis inflammation, and tumor growth. CYP24A1 is the key enzyme for metabolic inactivation of active VD (1,25(OH)2D3). We examined whether common germline single nucleotide polymorphisms (SNPs) in the CYP24A1 gene could affect the association between adult weight gain and breast cancer (BC) risk.