Alpha Klotho and phosphate homeostasis.

Alpha Klotho and phosphate homeostasis.
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Alpha Klotho 和磷酸盐稳态

DOI:
10.1007/s40618-014-0158-6
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发表时间:
2014-11
影响因子:
5.4
通讯作者:
Hu, M. C.
Hu, M. C.
中科院分区:
医学3区
文献类型:
--
作者:
Bian, A.;Xing, C.;Hu, M. C.

文献摘要

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Klotho家族由三种单次跨膜蛋白-αKlotho、βKlotho和γKlotho组成。它们中的每一种与成纤维细胞生长因子(FGF)受体(FGFR)结合以形成各种FGF的受体复合物。αKlotho是生理性FGF 23信号传导的共受体,似乎对FGF 23介导的矿物质代谢调节至关重要。αKlotho蛋白还在磷酸盐稳态中发挥FGF 23非依赖性作用。动物实验研究和临床观察表明,αKlotho缺乏可导致重度高磷血症; αKlotho中度升高可降低血清磷,αKlotho极高可诱导低磷血症和高FGF 23。αKlotho通过调节肠道磷酸盐吸收、肾脏的尿磷酸盐排泄以及磷酸盐分布到骨而不是软组织中,与其他促钙磷激素(如PTH、FGF 23和1,25-(OH)2维生素D)协同作用,将循环磷酸盐维持在较窄范围内。αKlotho在维持磷酸盐稳态中的作用是通过直接抑制靶器官中的钠依赖性磷酸盐协同转运蛋白介导的。因此,αKlotho操作可能是遗传性和获得性磷酸盐紊乱以及αKlotho缺乏症(如慢性肾脏疾病)的新策略。
The Klotho family consists of three single-pass transmembrane proteins—αKlotho, βKlotho and γKlotho. Each of them combines with fibroblast growth factor (FGF) receptors (FGFRs) to form receptor complexes for various FGF’s. αKlotho is a co-receptor for physiological FGF23 signaling and appears essential for FGF23-mediated regulation of mineral metabolism. αKlotho protein also plays a FGF23-independent role in phosphate homeostasis. Animal experimental studies and clinical observations have demonstrated that αKlotho deficiency leads to severe hyperphosphatemia; moderate elevation of αKlotho reduces serum phosphate and extremely high αKlotho induces hypophosphatemia and high-FGF23. αKlotho maintains circulating phosphate in a narrow range by modulating intestinal phosphate absorption, urinary phosphate excretion by the kidney, and phosphate distribution into bone rather than soft tissue in concerted interaction with other calciophosphotropic hormones such as PTH, FGF23, and 1,25-(OH)2 vitamin D. The role of αKlotho in maintenance of phosphate homeostasis is mediated by direct suppression of Na-dependent phosphate cotransporters in target organs. Therefore, αKlotho manipulation may be a novel strategy for genetic and acquired phosphate disorders and for medical conditions with αKlotho deficiency such as chronic kidney disease in future.
DOI: 10.1097/mnh.0b013e32832c224f
发表时间: 2009-07
影响因子: 3.2
作者:
Feng JQ;Ye L;Schiavi S
通讯作者: Schiavi S
αKlotho 和血管钙化:一个不断发展的范例。
DOI: 10.1097/01.mnh.0000447024.97464.a3
发表时间: 2014-07
影响因子: 3.2
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Hu MC;Kuro-o M;Moe OW
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DOI: 10.1007/978-1-4614-0887-1_9
发表时间: 2012
影响因子: --
作者:
Hu, Ming Chang;Kuro-o, Makoto;Moe, Orson W.
通讯作者: Moe, Orson W.
DOI: 10.1146/annurev-physiol-030212-183727
发表时间: 2013
影响因子: 18.2
作者:
Hu MC;Shiizaki K;Kuro-o M;Moe OW
通讯作者: Moe OW
DOI: 10.1172/jci5705
发表时间: 1999-08-01
影响因子: 15.9
作者:
Kawaguchi, H;Manabe, N;Kuro-o, M
通讯作者: Kuro-o, M