Electrophysiology of succinate transport across rabbit renal brush border membranes.
Electrophysiology of succinate transport across rabbit renal brush border membranes.
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琥珀酸跨兔肾刷状缘膜转运的电生理学。
DOI:
10.1113/jphysiol.1985.sp015605
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发表时间:
1985
期刊:
影响因子:
--
通讯作者:
Wright,EM
中科院分区:
文献类型:
--
作者:
Schell,RE;Wright,EM
In rabbit renal brush border membrane vesicles, the membrane potential was monitored using a voltage‐sensitive optical probe (diS‐C3‐(5)). The ionic dependence of the electrogenic Na+/succinate co‐transporter was determined in the presence of monovalent anions and mono‐, di‐, and trivalent cations. Na+ and La3+ were the only cations capable of supporting a succinate‐dependent membrane depolarization: Li+, K+, Rb+, Cs+, NH4+, Hg2+, Ca2+, Ba2+, Sr2+, Mg2+, Cu2+, Fe2+, Cd2+, Be2+, Pb2+, Zn2+, Mn2+ and Co2+ did not. Succinate increased the Na+ permeability of the brush border membrane in a saturable manner: saturating succinate (3 mM) concentrations increased the Na+/K+ permeability (PNa/PK) ratio from 0.6 to 2.3. In the presence of Na+, Li+ and Hg2+ inhibit the succinate potential: cis‐Li+ inhibition is competitive with an apparent Ki of 2 mM, while trans‐Li+ is noncompetitive; cis‐Hg2+ decreased the maximal depolarization with an inhibitor constant Ki of 8 microM, and this effect was irreversible. Cations having no effect included K+, Rb+, Cs+, NH4+, Ba2+, Ca2+, Mg2+, Sr2+, Cu2+, Fe2+, Cd2+, Co2+, Be2+, Zn2+, Pb2+, Mn2+, and La3+. It is concluded that succinate/Na+ co‐transport produces a specific increase in the Na+ conductance of renal brush borders.
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影响因子:
--
作者:
K. Jørgensen;U. Kragh‐Hansen;H. Røigaard;M. Sheikh
通讯作者:
M. Sheikh
影响因子:
4.1
作者:
U. Kragh‐Hansen;K. Jørgensen;M. Sheikh
通讯作者:
M. Sheikh
DOI:
--
发表时间:
1983
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Wright,SH;Hirayama,B;Kaunitz,JD;Kippen,I;Wright,EM
通讯作者:
Wright,EM
DOI:
10.1073/pnas.79.23.7514
发表时间:
1982
影响因子:
11.1
作者:
Wright,EM;Wright,SH;Hirayama,B;Kippen,I
通讯作者:
Kippen,I
DOI:
10.1152/ajprenal.1984.246.4.f363
发表时间:
1984
期刊:
The American journal of physiology
影响因子:
--
作者:
Wright,EM
通讯作者:
Wright,EM