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Vitamin D Action and Regulation of Bone Remodeling: Suppression of Osteoclastogenesis by the Mature Osteoblast

Vitamin D acts through the immature osteoblast to stimulate osteoclastogenesis. Transgenic elevation of VDR in mature osteoblasts was found to inhibit osteoclastogenesis associated with an altered OPG response. This inhibition was confined to cancellous bone. This study indicates that vitamin D–mediated osteoclastogenesis is regulated locally by OPG production in the mature osteoblast.