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  • Title: Responses of rachitic cartilage cells to metabolites of vitamin D3.
    Author: Blaugrund E, Edelstein S.
    Journal: Cell Biol Int Rep; 1988 May; 12(5):373-81. PubMed ID: 3261209.
    Abstract:
    Responses of cultured cartilage cells to metabolites of vitamin D3 were studied. Cells were obtained from the epiphyseal growth plate of rachitic chicks and were exposed to physiological and pharmacological concentrations of three metabolites of vitamin D3, 25 hydroxyvitamin D3 (25(OH)D3), 24,25-dihydroxyvitamin D3 (24,25(OH)2D3) and 1,25-dihydroxyvitamin D3 (1,25(OH)2D3). 1,25(OH)2D3 was found to reduce L-[U-14C]leucine incorporation into proteins and Na2 35SO4 incorporation into proteoglycans. The synthesis of 24,25(OH)2D3 from 25(OH)D3 was stimulated upon addition of 1,25(OH)2D3 to the cultures. Physiological concentrations of 24,25(OH)2D3 stimulated protein and proteoglycan synthesis. These findings support the notion that vitamin D3, through its active dihydroxylated metabolites, is directly involved in cartilage cells metabolism and healing of rickets.
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