Ion transport in ‘tight’ epithelial monolayers of MDCK cells
Ion transport in ‘tight’ epithelial monolayers of MDCK cells
复制标题
MDCK 细胞“紧密”上皮单层中的离子传输
DOI:
10.1007/bf01875708
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发表时间:
1981
期刊:
影响因子:
--
通讯作者:
N. Simmons
中科院分区:
文献类型:
--
作者:
N. Simmons
SummaryCultured monolayers of MDCK cells grown upon filter supports display many features ofin vivo epithelia. Previously reported values of transmonolayer resistance of 100 Ωcm−2 (Misfeldt, Hamamoto & Pitelka, 1976; Cereijido, Robbins, Dolan, Rotunno & Sabatini, 1978) indicate a leaky epithelium. This paper describes the properties of a strain of MDCK cells which displays entirely different electrophysiological properties. The results show that (i) the mean transmonolayer resistance is 4.16 kΩ cm−2, (ii) transmonolayer ion transport is of small magnitude since the mean spontaneous open circuit PD is only 2.17 mV basal surface positive and isotopic Na and Cl flux measurements fail to demonstrate a significant net flux, (iii) the action of ouabain, amiloride and ion substitutions are consistent with transmonolayer net Na movement being largely responsible for the spontaneous PD, and (iv) asymmetry in the localization of the Na-K ATPase is evident on the basis of3H-ouabain binding to cell monolayer.
DOI:
10.1016/0005-2736(80)90446-0
发表时间:
1980-01-01
期刊:
BIOCHIMICA ET BIOPHYSICA ACTA
影响因子:
--
作者:
GECK, P;PIETRZYK, C;HEINZ, E
通讯作者:
HEINZ, E
DOI:
--
发表时间:
1980
期刊:
Federation proceedings
影响因子:
--
作者:
Civan,MM
通讯作者:
Civan,MM