Effect of a chloride channel blocker on bullfrog corneal epithelium.
Effect of a chloride channel blocker on bullfrog corneal epithelium.
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氯离子通道阻滞剂对牛蛙角膜上皮的影响。
DOI:
10.1152/ajpcell.1988.254.4.c519
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发表时间:
1988
期刊:
影响因子:
--
通讯作者:
Zadunaisky,JA
中科院分区:
文献类型:
--
作者:
Scheide,JI;Zadunaisky,JA
The effect of the chloride channel blocker, diphenylamine-2-carboxylate (DPC), was investigated on the bullfrog cornea epithelium using microelectrodes. Perfusion of 2 X 10(-4) M DPC on the tear side resulted in a 44% reduction of the corneal transepithelial potential difference (TEP) and a 9% reduction in corneal conductance. The cornea epithelial cells hyperpolarized 7.2 +/- 1.5 mV, and the apical fractional resistance increased 35% (n = 8 tissues). The basolateral potential difference depolarized 5.5 +/- 1.8 mV. The relative apical conductance decreased 29%, whereas relative changes of basolateral membranes increased 56% with prolonged DPC exposure, indicating that the DPC inhibition was acting at the apical cell membrane. DPC-treated corneas could be stimulated with isoproterenol (10(-6) M), indicating that the DPC inhibition could be reversed with the stimulation of chloride conductance. The DPC inhibitory effect was dependent on basolateral chloride. Intracellular chloride activity increases with DPC, indicating that the integrity of the basolateral chloride entry mechanism was not altered. The DPC inhibitory action was due to a reduction in apical chloride conductance.
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DOI:
--
发表时间:
1977
期刊:
The Journal of General Physiology
影响因子:
--
作者:
P. Palade;R. Barchi
通讯作者:
R. Barchi
影响因子:
--
作者:
R. Montoreano;O. Candia;P. Cook
通讯作者:
P. Cook
DOI:
--
发表时间:
1977
期刊:
Journal of Physiology
影响因子:
--
作者:
S. Klyce;R. Wong
通讯作者:
R. Wong
影响因子:
--
作者:
O. Candia
通讯作者:
O. Candia
影响因子:
3.4
作者:
Reinach,PS;Kirchberger,MA
通讯作者:
Kirchberger,MA