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Demonstration of 1,25(OH)2 vitamin D3 receptors and actions in vascular smooth muscle cellsIn vitro

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Summary

Binding of [3H] 1,25 (OH)2D3 and effects of 1,25 (OH)2D3 on cell ultrastructure were evaluated in vascular smooth muscle cells (VSMC) primary cultures (aortic media). Specific reversible binding of [3H] 1,25 (OH)2D3 by a 3.5 S macromolecule with DNA binding, KD 6.2×10−10M and Nmax 16 fmol/mg protein was demonstrated. Incubation of VSMC with 10−8 M 1,25 (OH)2D3, but not 25 (OH)D3, in the presence of 10% FCS for up to three weeks caused rapid reversible appearance in the cytoplasm of membrane-bounded electron-dense lysosomal particles which on electronspectroscopic imaging contained Ca and Pi. VSMC are targets for vitamin D.

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Authors and Affiliations

  1. Dept. Internal Medicine and Pathology, University of Heidelberg, Federal Republic of Germany

    J. Merke, W. Hofmann, D. Goldschmidt & E. Ritz

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  1. J. Merke
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  2. W. Hofmann
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  3. D. Goldschmidt
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  4. E. Ritz
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Merke, J., Hofmann, W., Goldschmidt, D. et al. Demonstration of 1,25(OH)2 vitamin D3 receptors and actions in vascular smooth muscle cellsIn vitro . Calcif Tissue Int 41, 112–114 (1987). https://doi.org/10.1007/BF02555253

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  • DOI: https://doi.org/10.1007/BF02555253

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