A Ca2+-activated K+ channel from rabbit aorta: modulation by cromakalim.
A Ca2+-activated K+ channel from rabbit aorta: modulation by cromakalim.
复制标题
来自兔主动脉的 Ca2 激活 K 通道:cromakalim 的调节。
DOI:
10.1016/0014-2999(89)90580-3
复制
发表时间:
1989
影响因子:
5
通讯作者:
VanBreemen,C
中科院分区:
文献类型:
--
作者:
Gelband,CH;Lodge,NJ;VanBreemen,C
A large conductance Ca2+-activated K+channel from rabbit aorta was incorporated into planar lipid bilayers. This channel had a conductance of 337 ± 7 pS in symmetrical 250 mM KCl solutions and had a Na+/K+permeability ratio of < 0.04. In asymmetrical solutions containing 300 mM KCl cis (intracellular), 100 mM KCl trans (extracellular) or 100 mM KCl cis 500 mM KCl trans, the reversal potentials for the channel were −30 and +46 mV, respectively. This channel possessed voltage-dependent activation and cis (intracellular) Ca2+sensitivity. Cromakalim (50 nM) added to the trans side of the bilayer significantly increased the Popenby 56% from 0.09 ± 0.01 to 0.14 ± 0.01(P < 0.01) at −40 mV without altering the single channel conductance. This effect was dose-dependent, increasing at higher cromakalim concentrations. The primary effect of cromakalim was to decrease the τslowof the channel closed state from 266 ± 32 to 147 ± 17 ms which is sufficient to account for the increase in Popenof the channel in the presence of cromakalim.
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影响因子:
3
作者:
R. Buckingham;J. Clapham;T. C. Hamilton;S. Longman;J. Norton;R. Poyser
通讯作者:
R. Poyser
DOI:
10.1152/ajpcell.1987.252.4.c401
发表时间:
1987
期刊:
The American journal of physiology
影响因子:
--
作者:
Y. Ohya;K. Kitamura;H. Kuriyama
通讯作者:
H. Kuriyama
DOI:
10.1242/jeb.124.1.5
发表时间:
1986
期刊:
The Journal of experimental biology
影响因子:
--
作者:
Golowasch,J;Kirkwood,A;Miller,C
通讯作者:
Miller,C
影响因子:
64.8
作者:
M. Nelson;R. French;B. Krueger
通讯作者:
B. Krueger
DOI:
--
发表时间:
1988
期刊:
Life Science
影响因子:
--
作者:
U. Quast;N. Cook
通讯作者:
N. Cook