EFFECT OF CELL SODIUM ON NA+/K+-ATPASE-DEPENDENT SODIUM-EFFLUX IN CORTICAL COLLECTING TUBULE OF RABBITS UNDER DIFFERENT ALDOSTERONE STATUS

被引:11
作者
BLOTCHABAUD, M
JAISSER, F
BONVALET, JP
FARMAN, N
机构
[1] INSERM U 246 Département biologie, SBCe, CEN Saclay
关键词
(Rabbit); Aldosterone; ATPase; Na[!sup]+[!/sup]/K[!sup]+[!/sup]-; Sodium ion efflux;
D O I
10.1016/0005-2736(90)90408-G
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Aldosterone increased the tubular volume in cortical collecting tubules (CCD) of rabbit kidney. It modulated the rate of cell sodium accumulation, under condition of ATPase inhibition (4° C, in the absence of K+). In contrast, the relationship between Na+/K+-ATPase-dependent Na+ extrusion rate and intracellular Na+ concentration (Na+i) was similar in control, adrenalectomized, and aldosterone-treated adrenalectomized animals; Na+ extrusion rate increased with Na+i, up to 70 mM Na+i, and then plateaued. This indicates that aldosterone does not modify the characteristics of Na+i-dependent Na+ extrusion rate by the Na+/K+-ATPase pump in CCD. © 1990.
引用
收藏
页码:126 / 128
页数:3
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