Effects of vitamin D and diet magnesium on magnesium metabolism.

Effects of vitamin D and diet magnesium on magnesium metabolism.
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维生素 D 和膳食镁对镁代谢的影响。

DOI:
10.1152/ajpendo.1980.239.6.e515
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发表时间:
1980
期刊:
The American journal of physiology
影响因子:
--
通讯作者:
Coburn,JW
Coburn,JW
中科院分区:
--
文献类型:
--
作者:
Levine,BS;Brautbar,N;Walling,MW;Lee,DB;Coburn,JW

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研究了维生素D3 (D3)、1,25-二羟维生素D3 [1,25(OH)2D3]、2425 -二羟维生素D3 [2425 (OH)2D3]、1,2425 -三羟维生素D3 [1,24,25(OH)3D3]对维生素d缺乏(d)大鼠Mg代谢的影响。1,25(OH)2D3和1,24,25(OH)3D3的Mg吸收量增加,以摄入量百分比表示。尿Mg (UMg)升高,血清Mg (SMg)或Mg平衡无变化。1,25(OH)2D3在提高血清钙和镁吸收方面比1,24,25(OH)3D3强三倍。在另一项实验中,配对喂养的大鼠分别给予D3、1,25-(OH)2D3或1,24,25(OH)3D3,饮食中含有0.03或0.2% Mg;1,25(OH)2D3和D3在3天后降低SMg;24 h后UMg升高并保持升高。D3和1,25(OH)2D3增强Mg的吸收;0.2% Mg降低了d型动物对Mg的吸收。所有甾醇均能增强d大鼠对Mg的吸收;1,25(OH)2D3和1,24,25(OH)3D3的早期作用表明1-羟基化是必要的。0.2% Mg对D大鼠Mg吸收的抑制表明有两种转运过程,其中一种依赖于维生素D。添加1,25(OH)2D3后,mg升高,SMg降低,表明管状重吸收减少。
Effects of 6-9 days of vitamin D3 (D3), 1,25-dihydroxyvitamin D3 [1,25(OH)2D3], 24,25-dihydroxyvitamin D3 [24,25(OH)2D3], or 1,24,25-trihydroxyvitamin D3 [1,24,25(OH)3D3] on Mg metabolism were studied in vitamin D-deficient (-D) rats. Mg absorption expressed as percent intake increased with 1,25(OH)2D3 and 1,24,25(OH)3D3. Urinary Mg (UMg) increased with no change in serum Mg (SMg) or Mg balance. 1,25(OH)2D3 was threefold more potent than 1,24,25(OH)3D3 in raising serum Ca and Mg absorption. In a separate experiment in pair-fed rats given D3, 1,25-(OH)2D3, or 1,24,25(OH)3D3, the diet contained either 0.03 or 0.2% Mg; 1,25(OH)2D3 and D3 lowered SMg after 3 days; UMg increased after 24 h to remain elevated. D3 and 1,25(OH)2D3 augmented Mg absorption; feeding 0.2% Mg lowered Mg absorption in -D animals. All sterols augmented Mg absorption in -D rats; both the earlier action of 1,25(OH)2D3 and 1,24,25(OH)3D3 suggests that 1-hydroxylation is necessary. Suppressed Mg absorption with 0.2% Mg in -D rats suggests two transport processes, with one vitamin D dependent. Higher UMg with decreased SMg with 1,25(OH)2D3 suggests reduced tubular reabsorption.
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