| Literature DB >> 2820558 |
J Merke1, W Hofmann, D Goldschmidt, E Ritz.
Abstract
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 X 10(-10) M 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.Entities:
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Year: 1987 PMID: 2820558 DOI: 10.1007/BF02555253
Source DB: PubMed Journal: Calcif Tissue Int ISSN: 0171-967X Impact factor: 4.333