Vitamin D and the kidney.

Vitamin D and the kidney.
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DOI:
10.1016/j.abb.2012.03.003
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发表时间:
2012-07-01
影响因子:
3.9
通讯作者:
Thompson, James R.
Thompson, James R.
中科院分区:
生物学3区
文献类型:
--
作者:
Kumar, Rajiv;Tebben, Peter J.;Thompson, James R.

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肾脏对于维持正常的钙和磷稳态是必不可少的。钙和无机磷在肾小球被过滤,并通过受1α,25-二羟维生素(1α,25(OH)2D)和甲状旁腺激素(PTH)调节的转运蛋白和通道从肾小管段重吸收。肾脏是生理条件下1α,25(OH)2D合成的主要部位,也是24,25-二羟维生素D(24,25(OH)2D)合成的部位之一。25(OH)D-1α-羟化酶是负责合成1α,25(OH)2D的多功能氧化酶,其活性受PTH、1α,25(OH)2D、成纤维细胞生长因子23(FGF 23)、无机磷和其他生长因子的调节。此外,与1α,25(OH)2D结合并介导1α,25(OH)2D活性的维生素D受体广泛分布于肾脏。因此,肾脏通过调节多种转运和合成过程在维持生理状态下的矿物质稳态中是不可或缺的。
The kidney is essential for the maintenance of normal calcium and phosphorus homeostasis. Calcium and inorganic phosphorus are filtered at the glomerulus, and are reabsorbed from tubular segments by transporters and channels which are regulated by 1α,25-dihydroxyvitamin (1α,25(OH)2D) and parathyroid hormone (PTH). The kidney is the major site of the synthesis of 1α,25(OH)2D under physiologic conditions, and is one of the sites of 24,25-dihydroxyvitamin D (24,25(OH)2D) synthesis. The activity of the 25(OH)D-1α-hydroxylase, the mixed function oxidase responsible for the synthesis of 1α,25(OH)2D, is regulated by PTH, 1α,25(OH)2D, fibroblast growth factor 23 (FGF23), inorganic phosphorus and other growth factors. Additionally, the vitamin D receptor which binds to, and mediates the activity of 1α,25(OH)2D, is widely distributed in the kidney. Thus, the kidney by regulating multiple transport and synthetic processes is indispensible in the maintenance of mineral homeostasis in physiological states.
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