Formate-stimulated NaCl absorption in the proximal tubule is independent of the pendrin protein.

Formate-stimulated NaCl absorption in the proximal tubule is independent of the pendrin protein.
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近曲小管中甲酸盐刺激的 NaCl 吸收与 pendrin 蛋白无关。

DOI:
10.1152/ajprenal.00182.2002
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发表时间:
2002
期刊:
American journal of physiology. Renal physiology
影响因子:
--
通讯作者:
Aronson,PeterS
Aronson,PeterS
中科院分区:
--
文献类型:
--
作者:
Karniski,LawrenceP;Wang,Tong;Everett,LorraineA;Green,EricD;Giebisch,Gerhard;Aronson,PeterS

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近端小管顶膜的活性氯重吸收的一个重要部分是由氯/甲酸盐交换过程介导的,由此细胞内甲酸盐驱动氯转运到细胞中。当氯离子/甲酸盐交换与Na+/H+交换和甲酸盐的H+-偶联再循环并行操作时,净结果是电中性NaCl重吸收。Pendrin是PDS基因(SLC 26 A4)的蛋白质产物,并在几种不同的阴离子交换模式中起作用,包括氯离子/甲酸根交换。Pendrin在肾脏中表达,并可能作为负责甲酸盐依赖性NaCl重吸收的转运蛋白。在本研究中,Pds基因敲除小鼠用于确定pendrin在近端小管氯重吸收中的作用。我们发现,甲酸盐依赖性氯化钠的吸收在微灌注近端小管之间的野生型和pendrin缺陷的小鼠是相似的。此外,从野生型和pendrin缺陷小鼠中分离的刷状缘膜囊泡中甲酸盐介导的氯离子转运速率没有差异。这些研究表明,pendrin是不负责甲酸盐依赖性的NaCl在近端小管重吸收。
A significant fraction of active chloride reabsorption across the apical membrane of the proximal tubule is mediated by a chloride/formate exchange process, whereby intracellular formate drives the transport of chloride into the cell. When chloride/formate exchange operates in parallel with Na+/H+exchange and H+-coupled recycling of formate, the net result is electroneutral NaCl reabsorption. Pendrin is the protein product of thePDSgene (SLC26A4) and functions in several different anion exchange modes, including chloride/formate exchange. Pendrin is expressed in the kidney and may serve as the transporter responsible for formate-dependent NaCl reabsorption. In the present study,Pds-knockout mice were used to determine the role of pendrin in proximal tubule chloride reabsorption. We show that formate-dependent NaCl absorption in microperfused proximal tubules is similar between wild-type and pendrin-deficient mice. In addition, there is no difference in the rate of formate-mediated chloride transport in brush-border membrane vesicles isolated from wild-type and pendrin-deficient mice. These studies demonstrate that pendrin is not responsible for formate-dependent NaCl reabsorption in the proximal tubule.
DOI: 10.1152/ajprenal.2001.281.2.f288
发表时间: 2001-08
期刊: American journal of physiology. Renal physiology
影响因子: --
作者:
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通讯作者: Tong Wang;Chao-Ling Yang;T. Abbiati;G. Shull;Gerhard Giebisch;Peter S. Aronson
DOI: --
发表时间: 1979
影响因子: --
作者:
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DOI: 10.1093/hmg/9.11.1709
发表时间: 2000-07-01
影响因子: 3.5
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甲酸盐和草酸盐对大鼠近曲小管容量吸收的影响。
DOI: 10.1152/ajprenal.1992.263.1.f37
发表时间: 1992
期刊: The American journal of physiology
影响因子: --
作者:
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甲酸盐对兔近曲小管容量重吸收的影响。
DOI: 10.1172/jci112803
发表时间: 1987
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影响因子: --
作者:
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