Activation of potassium ion transport in mitochondria by cadmium ion.
Activation of potassium ion transport in mitochondria by cadmium ion.
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镉离子激活线粒体中钾离子的转运。
DOI:
10.1111/j.1432-1033.1984.tb08513.x
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发表时间:
1984
期刊:
影响因子:
--
通讯作者:
Sanadi,DR
中科院分区:
文献类型:
--
作者:
Rasheed,BK;Diwan,JJ;Sanadi,DR
Low levels of Cd2+(1–5 μM) produce rapid swelling of mitochondria, which is respiration‐dependent and uncoupler‐sensitive. No cation requirement is apparent, since the swelling occurs in a medium containing only sucrose and the respiratory substrate. The swelling is inhibited by ruthenium red, suggesting that this effect of Cd2+requires its entry into mitochondria. In medium containing 9 mM K+, addition of Cd2+along with ruthenium red increases the rate of K+influx threefold. In the presence of K+, Rb+or Li+, but not of Na+, addition of Cd2+produces first efflux of H+into the medium followed by discharge of the pH gradient or uncoupling. Only the latter effect is inhibited by ruthenium red, showing that the efflux and influx of H+are independent reactions. The H+efflux appears to be an antiport response to the induced K+entry. Its activation by Cd2+is similar to the known effect ofp‐chloromercuriphenyl sulfonate. The H+influx or uncoupling appears to result from binding of Cd2+to some matrix‐facing membrane site, perhaps the dithiol group on coupling factor B, and may relate to apparent permeability changes associated with Cd2+‐induced swelling.
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DOI:
--
发表时间:
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期刊:
Federation proceedings
影响因子:
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作者:
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DOI:
10.1152/ajpgi.1985.248.6.g692
发表时间:
1985
期刊:
The American journal of physiology
影响因子:
--
作者:
M. Noguchi;H. Adachi;J. Gardner;R. Jensen
通讯作者:
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