Title : Contrasting effects of exogenous 1,25-dihydroxyvitamin D [1,25-(OH)2D] versus endogenous 1,25-(OH)2D, induced by dietary calcium restriction, on vitamin D receptors.

Pub. Date : 1990 Feb

PMID : 2153516






6 Functional Relationships(s)
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1 The biological actions of 1,25-dihydroxyvitamin D [1,25-(OH)2D] are mediated by specific binding of the hormone with an intracellular vitamin D receptor, which ultimately regulates expression of genes within the target tissues. 1,25-dihydroxyvitamin D vitamin D receptor Rattus norvegicus
2 The biological actions of 1,25-dihydroxyvitamin D [1,25-(OH)2D] are mediated by specific binding of the hormone with an intracellular vitamin D receptor, which ultimately regulates expression of genes within the target tissues. 1,25-(oh)2d vitamin D receptor Rattus norvegicus
3 Compared with those in control rats, 1,25-(OH)2D3 treatment resulted in a 1.5-fold increase in duodenal vitamin D receptor content (351 +/- 16 vs. 520 +/- 21 fmol/mg protein) and a 3-fold increase in renal vitamin D receptor content (60.3 +/- 5.2 vs. 193.8 +/- 22.7 fmol/mg protein). Calcitriol vitamin D receptor Rattus norvegicus
4 Compared with those in control rats, 1,25-(OH)2D3 treatment resulted in a 1.5-fold increase in duodenal vitamin D receptor content (351 +/- 16 vs. 520 +/- 21 fmol/mg protein) and a 3-fold increase in renal vitamin D receptor content (60.3 +/- 5.2 vs. 193.8 +/- 22.7 fmol/mg protein). Calcitriol vitamin D receptor Rattus norvegicus
5 The effects of endogenously produced 1,25-(OH)2D on tissue vitamin D receptor content were studied by feeding rats either a 0.02% or 1% calcium diet for 2, 7, 14, or 21 days. 1,25-(oh)2d vitamin D receptor Rattus norvegicus
6 The renal vitamin D receptor content of calcium restricted rats was 20-38% lower (P less than 0.05) than that in rats fed a calcium-replete diet 7, 14, and 21 days after initiation of the dietary treatments. Calcium vitamin D receptor Rattus norvegicus