Vitamin D Receptor: Key Roles in Bone Mineral Pathophysiology, Molecular Mechanism of Action, and Novel Nutritional Ligands

    Peter W. Jurutka, Leonid Bartik, G. Kerr Whitfield, Douglas R. Mathern, Thomas K. Barthel, M. I. Gurevich, Jui Cheng Hsieh, Magdalena Kaczmarska, Carol A. Haussler, Mark R. Haussler
    TLDR Vitamin D and its receptor are crucial for bone health and can be influenced by certain fats and curcumin.
    The study explored the role of the vitamin D hormone, 1,25-dihydroxyvitamin D(3) [1,25(OH)(2)D(3)], in regulating calcium and phosphate metabolism through its interaction with the nuclear vitamin D receptor (VDR) and its retinoid X receptor (RXR) partner. It highlighted the reciprocal relationship between 1,25(OH)(2)D(3) and fibroblast growth factor 23 (FGF23) in controlling phosphate levels, similar to the 1,25(OH)(2)D(3)-PTH axis for calcium regulation. The research also identified novel VDR ligands, including omega3/omega6 polyunsaturated fatty acids (PUFAs) and curcumin, which could activate VDR independently of 1,25(OH)(2)D(3), suggesting potential new pathways for VDR-mediated effects in various tissues, including bone, intestine, and skin/hair follicles.
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