Abstract
The principal function of vitamin D in the maintenance of calcium homeostasis is to increase intestinalĀ calcium absorption. This conclusion was made from studies in vitamin D receptor (VDR) null mice which showed that rickets and osteomalacia were prevented when VDR null mice were fed a rescue diet that included high calcium, indicating that the skeletal abnormalities of the VDR null mice are primarily the result of impaired intestinal calcium absorption. Although vitamin D is critical for controlling intestinal calcium absorption, the mechanisms involved have remained incomplete. This chapter reviews studies, including studies in genetically modified mice, that have provided new insight and have challenged the traditional model of VDR-mediated calcium absorption.
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Acknowledgements
SC receives funding from the National Institutes of Health grants AG044552, DK112365 and AI121621.
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Christakos, S., Veldurthy, V., Patel, N., Wei, R. (2017). Intestinal Regulation of Calcium: Vitamin D and Bone Physiology. In: McCabe, L., Parameswaran, N. (eds) Understanding the Gut-Bone Signaling Axis. Advances in Experimental Medicine and Biology, vol 1033. Springer, Cham. https://doi.org/10.1007/978-3-319-66653-2_1
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