1,25-Dihydroxyvitamin D<sub>3</sub>and Human Bone-Derived Cells in Vitro: Effects on Alkaline Phosphatase, Type I Collagen and Proliferation*
1,25-Dihydroxyvitamin D3 [1,25-(OH)2D3], but not 24,25-(OH)2D3 stimulates the alkaline phosphatase activity of cultured human bone cell populations. The stimulatory effect of th...