The renal type II Na+/phosphate cotransporter

被引：24

作者：

Biber, J ^{[1
]}

Murer, H ^{[1
]}

Forster, I ^{[1
]}

机构：

[1] Univ Zurich, Inst Physiol, CH-8057 Zurich, Switzerland

来源：

JOURNAL OF BIOENERGETICS AND BIOMEMBRANES | 1998年 / 30卷 / 02期

关键词：

proximal tubule; transport; phosphate; regulation;

D O I：

10.1023/A:1020525409894

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

A sodium-dependent phosphate transporter (type II Na/Pi-cotransporter) was isolated which is expressed in apical membranes of proximal tubules and exhibits transport characteristics similar as described for renal reabsorption of phosphate. Type II associated Na/Pi-cotransport is electrogenic and results obtained by electrophysiological measurements support a transport model having a stoichiometry of 3 Na+/HPO4=. Changes of transport such as by parathyroid hormone and altered dietary intake of phosphate correlate with changes of the number of type II cotransporters in the apical membrane. These data suggest that the type II Na/Pi-cotransporter represents the main target for physiological and pathophysiological regulation.

引用

页码：187 / 194

页数：8

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