The role of chloride transport in the thick ascending limb in the pathogenesis of Bartter's syndrome

1982 ◽  
Vol 60 (19) ◽  
pp. 1212-1214 ◽  
Author(s):  
J. R. Gill
PEDIATRICS ◽  
1980 ◽  
Vol 66 (5) ◽  
pp. 784-786
Author(s):  
Vivian M. Reznik ◽  
William R. Griswold ◽  
Stanley A. Mendoza ◽  
Richard M. McNeal

A case of Neo-Mull-Soy-induced metabolic alkalosis occurred in an 8-month-old child. This child had hypochloremic hypokalemic alkalosis as well as hyperreninemia. Initially, a diagnosis of Bartter's syndrome was made and treatment consisted of KCl replacement, indomethacin, and aspirin. In retrospect, the diagnosis of Neo-Mull-Soy induced metabolic alkalosis could have been suspected on the basis of the low chloride concentration in his urine. Proposed mechanisms for the etiology of Bartter's syndrome are reviewed. Neo-Mull-Soy induced metabolic alkalosis simulates Bartter's syndrome and supports the concept that the primary abnormality in Bartter's syndrome is chloride deficiency. The chloride deficiency in Bartter's syndrome results from a defect in active chloride transport in the thick ascending limb of the loop of Henle.


1983 ◽  
pp. 353-364 ◽  
Author(s):  
Jeffrey S. Stoff ◽  
David M. Clive ◽  
Diane Leone ◽  
D. Euan MacIntyre ◽  
Robert S. Brown ◽  
...  

2008 ◽  
Vol 294 (6) ◽  
pp. F1373-F1380 ◽  
Author(s):  
Carsten A. Wagner ◽  
Dominique Loffing-Cueni ◽  
Qingshang Yan ◽  
Nicole Schulz ◽  
Panagiotis Fakitsas ◽  
...  

Bartter's syndrome represents a group of hereditary salt- and water-losing renal tubulopathies caused by loss-of-function mutations in proteins mediating or regulating salt transport in the thick ascending limb (TAL) of Henle's loop. Mutations in the ROMK channel cause type II antenatal Bartter's syndrome that presents with maternal polyhydramnios and postnatal life-threatening volume depletion. We have developed a colony of Romk null mice showing a Bartter-like phenotype and with increased survival to adulthood, suggesting the activation of compensatory mechanisms. To test the hypothesis that upregulation of Na+-transporting proteins in segments distal to the TAL contributes to compensation, we studied expression of salt-transporting proteins in ROMK-deficient ( Romk−/−) mice. Plasma aldosterone was 40% higher and urinary PGE2 excretion was 1.5-fold higher in Romk−/− compared with wild-type littermates. Semiquantitative immunoblotting of kidney homogenates revealed decreased abundances of proximal tubule Na+/H+ exchanger (NHE3) and Na+-Pi cotransporter (NaPi-IIa) and TAL-specific Na+-K+-2Cl−-cotransporter (NKCC2/BSC1) in Romk−/− mice, while the distal convoluted tubule (DCT)-specific Na+-Cl− cotransporter (NCC/TSC) was markedly increased. The abundance of the α-,β-, and γ-subunits of the epithelial Na+ channel (ENaC) was slightly increased, although only differences for γ-ENaC reached statistical significance. Morphometry revealed a fourfold increase in the fractional volume of DCT but not of connecting tubule (CNT) and collecting duct (CCD). Consistently, CNT and CD of Romk−/− mice revealed no apparent increase in the luminal abundance of the ENaC compared with those of wild-type mice. These data suggest that the loss of ROMK-dependent Na+ absorption in the TAL is compensated predominately by upregulation of Na+ transport in downstream DCT cells. These adaptive changes in Romk−/− mice may help to limit renal Na+ loss, and thereby, contribute to survival of these mice.


Hypertension ◽  
1999 ◽  
Vol 33 (1) ◽  
pp. 419-423 ◽  
Author(s):  
Osamu Ito ◽  
Richard J. Roman

1976 ◽  
Vol 60 (6) ◽  
pp. 785-797 ◽  
Author(s):  
M.P. Fichman ◽  
N. Telfer ◽  
P. Zia ◽  
P. Speckart ◽  
M. Golub ◽  
...  

2009 ◽  
Vol 205 (S625) ◽  
pp. 135-140 ◽  
Author(s):  
Ingolf Nielsen ◽  
Birger Hesse ◽  
Poul Christensen.

1994 ◽  
Vol 33 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Motoki SANO ◽  
Masayoshi SHICHIRI ◽  
Takashi IDA ◽  
Sei SASAKI ◽  
Hiroshi TSUKAGOSHI

1980 ◽  
Vol 14 (12) ◽  
pp. 1395-1397 ◽  
Author(s):  
A Etzioni ◽  
C Chaimovitz ◽  
Y Levi ◽  
A Benderli ◽  
O S Better

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