Thick ascending limb: the Na+:K+:2Cl- co-transporter, NKCC2, and the calcium-sensing receptor, CaSR

被引:88
作者
Gamba, Gerardo [1 ,2 ]
Friedman, Peter A. [3 ]
机构
[1] Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mol Physiol Unit, Mexico City, DF, Mexico
[2] Univ Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 14000, DF, Mexico
[3] Univ Pittsburgh, Sch Med, Dept Pharmacol & Chem Biol, Pittsburgh, PA 15261 USA
来源
PFLUGERS ARCHIV-EUROPEAN JOURNAL OF PHYSIOLOGY | 2009年 / 458卷 / 01期
基金
美国国家卫生研究院;
关键词
Diuretics; Hypertension; Salt transport; Regulation; Phosphorylation; Isoforms; K-CL COTRANSPORTER; EXTRACELLULAR CA2+-SENSING RECEPTOR; RENAL NA+-K+-2CL(-) COTRANSPORTER; CATION-CHLORIDE-COTRANSPORTERS; INCREASES SURFACE EXPRESSION; ANTENATAL BARTTER-SYNDROME; MEDULLARY COLLECTING DUCT; BOVINE PARATHYROID CELLS; DISTAL CONVOLUTED TUBULE; AMINO-ACID-SEQUENCE;
D O I
10.1007/s00424-008-0607-1
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
The thick ascending limb of Henle's loop is a nephron segment that is vital to the formation of dilute and concentrated urine. This ability is accomplished by a consortium of functionally coupled proteins consisting of the apical Na+:K+:2Cl(-) co-transporter, the K+ channel, and basolateral Cl- channel that mediate electroneutral salt absorption. In thick ascending limbs, salt absorption is importantly regulated by the calcium-sensing receptor. Genetic or pharmacological disruption impairing the function of any of these proteins results in Bartter syndrome. The thick ascending limb is also an important site of Ca2+ and Mg2+ absorption. Calcium-sensing receptor activation inhibits cellular Ca2+ absorption induced by parathyroid hormone, as well as passive paracellular Ca2+ transport. The present review discusses these functions and their genetic and molecular regulation.
引用
收藏
页码:61 / 76
页数:16
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