Early studies identifying vitamin D as an antirachitic factor led to studies in vitamin D–deficient models that resulted in a basic understanding of the mechanism of action of vitamin D. Recent studies using genetically modified mice have provided important new insight into the physiological role of vitamin D at target tissues and the functional significance of vitamin D target proteins, as well as the functional significance of proteins involved in the transport and metabolism of vitamin D. Studies using these mice have played an increasingly important role in elucidating the mechanisms involved in the control of calcium homeostasis and have provided evidence for a role of vitamin D in extraskeletal health.


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  • Article Type: Review Article
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