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>1α, 25‐Dihydroxyvitamin D3specific regulation of growth, morphology, and fibronectin in a human osteosarcoma cell line
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1α, 25‐Dihydroxyvitamin D3specific regulation of growth, morphology, and fibronectin in a human osteosarcoma cell line
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机译：1α, 25‐Dihydroxyvitamin D3specific regulation of growth, morphology, and fibronectin in a human osteosarcoma cell line
AbstractThe ability of the hormonally active vitamin D metabolite, lα,25‐dihydroxyvitamin D3, to affect cell growth, morphology and fibronectin production has been examined using the MG‐63 human osteosarcoma cell line. Hormone treatment reduced cell growth rate, saturation density and [3H]thymidine incorporation. Inhibition was specific for lα,25‐dihydroxyvitamin D3relative to other vitamin D metabolites (lα,25‐dihydroxyvitamin D3>25‐dihydroxyvitamin D3>24R,25‐dihydroxyvitamin D3D3), antagonized by high concentrations of serum and readily reversed by removal of lα,25‐dihydroxyvitamin D3from the culture medium. Hormone treatment also increased cell associated alkaline phosphatase activity up to twofold and altered morphology such that treated cells were more spread out on the culture dish and contained more cytoplasmic processes. Significantly, lα,25‐dihydroxyvitamin D3increased cellular and medium concentrations of fibronectin, a glycoprotein known to be involved in cellular adhesiveness. MG‐63 cells contain a specific lα,25‐dihydroxyvitamin D3receptor which ma
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