Anion modulation of calcium current voltage dependence and amplitude in salamander rods.
Anion modulation of calcium current voltage dependence and amplitude in salamander rods.
复制标题
蝾螈杆中钙电流电压依赖性和振幅的阴离子调制。
DOI:
10.1016/s0005-2736(99)00257-6
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发表时间:
2000
期刊:
影响因子:
--
通讯作者:
Stella,SL
中科院分区:
文献类型:
--
作者:
Thoreson,WB;Stella,SL
Hofmeister anions were used to investigate the ability of Cl−replacement to produce inhibition and a hyperpolarizing activation shift in L-type Ca2+currents (ICa) of rod photoreceptors. Inhibition of ICalargely followed the Hofmeister sequence: Cl−=Br−<NO−3<I−<ClO−4(ClO−4caused the greatest suppression). Anion-induced hyperpolarizing activation shifts also followed the Hofmeister sequence: Cl−<Br−<NO−3<I−<ClO−4(ClO−4caused the largest shift). Agreement with the Hofmeister sequence suggests that these effects are due to anion interactions at the membrane surface. Hofmeister anions also caused similar hyperpolarizing shifts in the voltage dependence of inwardly rectifying cation currents (Ih) and outward K+currents (IK) consistent with the hypothesis that hyperpolarizing shifts arise from anion effects on membrane surface potential. Sulfate and phosphate inhibited rod ICaand phosphate caused a significant leftward activation shift suggesting these anions are strongly adsorbed to the membrane. Because of the overlap between the physiological voltage range and the lower part of the ICaactivation curve, anion effects on amplitude and activation may influence synaptic transmission at the first retinal synapse.
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DOI:
10.1085/jgp.67.6.639
发表时间:
1976-06
期刊:
The Journal of general physiology
影响因子:
--
作者:
Miller RF;Dacheux RF
通讯作者:
Dacheux RF
DOI:
10.1016/s0021-9258(17)43574-5
发表时间:
1984
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
H. Pollard;C. Pazoles;C. Creutz;J. Scott;O. Zinder;A. Hotchkiss
通讯作者:
A. Hotchkiss
DOI:
10.1016/s0006-3495(96)79613-3
发表时间:
1996
期刊:
Biophysical journal.
影响因子:
--
作者:
Larsson,HP;Picaud,SA;Werblin,FS;Lecar,H
通讯作者:
Lecar,H
DOI:
--
发表时间:
1987
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Higashijima,T;Ferguson,KM;Sternweis,PC
通讯作者:
Sternweis,PC
影响因子:
3.5
作者:
RUPNIK, M;ZOREC, R
通讯作者:
ZOREC, R