Recent advances in the renal-skeletal-gut axis that controls phosphate homeostasis.

Recent advances in the renal-skeletal-gut axis that controls phosphate homeostasis.
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DOI:
10.1038/labinvest.2008.114
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发表时间:
2009-01
期刊:
Laboratory investigation; a journal of technical methods and pathology
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其他
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在生理条件下,无机磷酸盐 (Pi) 的稳态受到经典参与者之间日益复杂的相互作用和直接或间接反馈回路的网络的严格控制,例如维生素 D (1,25(OH)2D3)、甲状旁腺激素 (PTH)、肠和肾磷酸盐转运蛋白以及最近描述的磷酸钙和米抑制素。一系列的制衡抵消了 1,25(OH)2D3 和 PTH 的影响,从而能够微调肠道和肾脏的 Pi 吸收能力以及骨吸收和矿化。后者包括 PHEX、FGF-23、MEPE、DMP1 和分泌型 FRP4。尽管有大量具有复杂相互作用的调节成分,但该系统的冗余有限,并且在病理生理条件下容易出现失调。本文回顾并综合了最新进展,提出了 Pi 稳态的新模型。
Under physiological conditions, homeostasis of inorganic phosphate (Pi) is tightly controlled by a network of increasingly more complex interactions and direct or indirect feedback loops among classical players, such as vitamin D (1,25(OH)2D3), parathyroid hormone (PTH), intestinal and renal phosphate transporters, and the recently described phosphatonins and minhibins. A series of checks and balances offsets the effects of 1,25(OH)2D3 and PTH to enable fine-tuning of intestinal and renal Pi absorptive capacity and bone resorption and mineralization. The latter include PHEX, FGF-23, MEPE, DMP1, and secreted FRP4. Despite this large number of regulatory components with complex interactions, the system has limited redundancy and is prone to dysregulation under pathophysiological conditions. This article reviews and synthesizes recent advances to present a new model of Pi homeostasis.
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