Characterization of acid-base transport mechanisms in the kidney cell line RCCT-28A.
Characterization of acid-base transport mechanisms in the kidney cell line RCCT-28A.
复制标题
肾细胞系 RCCT-28A 中酸碱转运机制的表征。
DOI:
10.1038/ki.1993.29
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发表时间:
1993
影响因子:
19.6
通讯作者:
Bello-Reuss,E
中科院分区:
文献类型:
--
作者:
Bello-Reuss,E
Characterization of acid-base transport mechanisms in the kidney cell line RCCT-28A. RCCT-28 A cells, a continuous cell line of rabbit cortical collecting tubule origin, have been found to exhibit apical peanut-lectin binding, basal band-3 immunostaining and a transepithelial electrical resistance of 246 ± 37 Ω cm2. For the studies reported, confluent monolayers of RCCT-28A cells were grown on permeable wells and incubated in a control solution or in alkaline solutions by lowering PCO2. Equivalent H+fluxes (JH+) into the apical solution (nmol · min-1· cm2) were measured in the absence of drugs and in the presence of: amiloride (A,10-3M), N-ethylmaleimide (NEM, 5 mM) and omeprazole (OM, 100 µM) in the apical solution. After preincubation in control solutions JH+ was 21 ± 2 while A had no effect. Addition of NEM diminished JH+ to 12 ± 2 (P < 0.005), and OM diminished JH+ to 2 ± 2 (P < 0.001 vs. control). Monolayers incubated at low PCO2had a basal JH+ of 11 ± 5. No effect on JH+ could be demonstrated under these conditions by addition of NEM or OM. Removal of K+from the apical solution diminished apical acidification by 60%. The inhibitor of H+,K+-ATPase Schering 28080 (SCH) was tested at different concentrations and an inhibitory effect was demonstrated (JH+ - 2 ± 1 vs. 18 ± 1, SCH vs. control, respectively). Probenecid and bafilomycin-A also decreased apical acidification and an apical base-equivalent extrusion was apparent under the inhibitors effect. JH+ was abolished by removal of Cl-from the basolateral solution. These results are compatible with a H+-ATPase coexistent with a H+,K+-ATPase on the apical membrane and a basolateral membrane Cl-/HCO3-exchanger. An apical base extrusion mechanism operating simultaneously with the H+extrusion is suggested.
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DOI:
10.1172/jci110905
发表时间:
1983
期刊:
The Journal of clinical investigation
影响因子:
--
作者:
Stone,DK;Seldin,DW;Kokko,JP;Jacobson,HR
通讯作者:
Jacobson,HR
DOI:
10.1152/ajpcell.1986.251.3.c347
发表时间:
1986
期刊:
The American journal of physiology
影响因子:
--
作者:
Schuster,VL;Bonsib,SM;Jennings,ML
通讯作者:
Jennings,ML
DOI:
--
发表时间:
2006
期刊:
総務省統計研修所 リサーチペーパー 第5号
影响因子:
--
作者:
元山 斉;山口 幸三;ryoko Morozumi;美添泰人・荒木万寿夫
通讯作者:
美添泰人・荒木万寿夫
DOI:
--
发表时间:
1956
期刊:
Journal of the National Cancer Institute
影响因子:
--
作者:
R. L. Ehrmann;G. Gey
通讯作者:
G. Gey
DOI:
10.1152/ajprenal.1986.251.2.f173
发表时间:
1986
期刊:
The American journal of physiology
影响因子:
--
作者:
Steinmetz,PR
通讯作者:
Steinmetz,PR