Anion dependence of rabbit medullary collecting duct acidification.
Anion dependence of rabbit medullary collecting duct acidification.
复制标题
兔髓质集合管酸化的阴离子依赖性。
DOI:
10.1172/jci110905
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发表时间:
1983
期刊:
影响因子:
--
通讯作者:
Jacobson,HR
中科院分区:
文献类型:
--
作者:
Stone,DK;Seldin,DW;Kokko,JP;Jacobson,HR
Rabbit medullary collecting duct (MCD) acidification has been demonstrated to occur by means of a sodium-independent, aldosterone-stimulated mechanism. We have examined the anionic dependence of this process by means of the isolated perfused tubule technique. Total replacement of perfusate chloride with gluconate enhanced tubular bicarbonate reabsorption (JHCO3), from a basal rate of 10.7 +/- 1.0 pmol X mm-1 X min-1 to a rate of 15.01 +/- 1.0 pmol X mm-1 X min-1. Removal of bath chloride, with and without removal of perfusate chloride completely abolished acidification. Bath, but not luminal 4-acetamido-4' isothiocyano-2,2'-disulfonic stilbene provoked a marked decrease in JHCO3 from 10.1 +/- 1.2 pmol X mm-1 X min-1 to 2.3 +/- 0.3 pmol X mm-1 X min-1. Measurement of chloride reabsorptive rate (JCl) revealed colinearity between JHCO3 (9.18 +/- 0.9 pmol X mm-1 X min-1) and JCl (9.75 +/- 1.18 pmol X mm-1 X min-1). We propose a model of mammalian distal nephron acidification in which (a) cellular base exit is effected by means of a basolateral membrane Cl-base exchanger and (b) net electroneutrality of electrogenic proton secretion is maintained by the parallel movement of an anionic species, functionally chloride.
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DOI:
10.1152/ajprenal.1982.242.4.f395
发表时间:
1982
期刊:
The American journal of physiology
影响因子:
--
作者:
Warnock,DG;Yee,VJ
通讯作者:
Yee,VJ
影响因子:
15.9
作者:
H. Jacobson;J. Kokko
通讯作者:
J. Kokko
影响因子:
19.6
作者:
Stokes,JB;Ingram,MJ;Williams,AD;Ingram,D
通讯作者:
Ingram,D
影响因子:
7.4
作者:
G. G. Vurek;D. Warnock;R. Corsey
通讯作者:
R. Corsey
影响因子:
--
作者:
LOMBARD, WE;KOKKO, JP;JACOBSON, HR
通讯作者:
JACOBSON, HR