Structural adaptation in initial collecting tubule following reduction in renal mass.
Structural adaptation in initial collecting tubule following reduction in renal mass.
复制标题
肾质量减少后初始集合管的结构适应。
DOI:
10.1038/ki.1985.58
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发表时间:
1985
影响因子:
19.6
通讯作者:
Giebisch,G
中科院分区:
文献类型:
--
作者:
Zalups,RK;Stanton,BA;Wade,JB;Giebisch,G
Structural adaptation in initial collecting tubule following reduction in renal mass. Tubular function studies have shown that nephrectomy leads to a sharp increase in potassium secretion by initial collecting tubules. The aim of this study was to examine the relationship between potassium transport and the cellular morphology of the distal nephron. Clearance and ultrastructural studies were conducted in rats 10 days after 75% nephrectomy. Fractional urinary potassium excretion increased from 23.4 3.8% in controls to 63.9 10.1% in nephrectomized animals. Stereological analysis of principal cells in the initial collecting tubule revealed that following nephrectomy the surface density of the basolateral membrane increased from 2.32 0.12 to 4.11 0.20 rm2/sm3. While the basolateral membrane surface density of intercalated cells in this segment was not affected by nephrectomy, the luminal membrane surface density increased from 0.29 0.03 to 0.54 0.08 sm2/sm3. Ultrastructural changes were not observed in cells of the distal convoluted tubule. These observations demonstrate that cell type specific changes in membrane surface density accompany the adaptive increase in ion transport that occurs with a reduction in renal mass. The enhanced potassium excretion associated with nephrectomy may be partly mediated by a specific increase in the basolateral membrane of principal cells. The increase in luminal membrane of intercalated cells may be related to the increase in acid transport per surviving nephron following nephrectomy.Adaptation structurelle du tubule collecteur initial apres reduction de Ia masse nephronique. Des etudes de Ia fonction tubulaire ont montré que la nephrectomie conduit a une élévation prononcée de Ia sécrétion potassique par les tubules collecteurs initiaux. Le but de cette étude a été d'examiner Ia relation entre le transport du potassium et Ia morphologic cellulaire du néphron distal. Des etudes de clearance et d'ultrastructure ont dtd entreprises chez des rats 10 jours après néphrectomie de 75%. L'excrétion urinaire fractionnelle de potassium a augmenté de 23, 4 3, 8% chez les contrôles a 63, 9 10, 1% chez les animaux néphrectomisés. Une analyse stëréologique des cellules principales du tubule collecteur initial a révélé qu'après la
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影响因子:
6
作者:
P. Perosio;J. Brooks
通讯作者:
J. Brooks
影响因子:
6.2
作者:
K. Okajima;I. Honda;T. Kitagawa
通讯作者:
T. Kitagawa
DOI:
10.1126/science.2861660
发表时间:
1985
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Mobley,WC;Rutkowski,JL;Tennekoon,GI;Buchanan,K;Johnston,MV
通讯作者:
Johnston,MV
影响因子:
3.5
作者:
M. Brecher;W. Franklin
通讯作者:
W. Franklin
DOI:
--
发表时间:
1984
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Chandler,CE;Parsons,LM;Hosang,M;Shooter,EM
通讯作者:
Shooter,EM