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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
5
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pubmed:dateCreated |
1993-5-18
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pubmed:abstractText |
Stilbenedisulfonic acid derivatives have been shown to block Cl- channels directly in many different preparations. Therefore, the utility of these compounds as tools for studying the cAMP-dependent Cl- current (ICl) in guinea-pig ventricular myocytes was examined using the patch-clamp technique to record whole-cell Cl- currents at room temperature. It was found that 4-acetamido-4'-isothiocyanostilbene-2,2'-disulfonic acid (SITS) increased, rather than decreased, the isoproterenol (ISO)-activated Cl- current. However, SITS alone stimulated little or no sustained current, suggesting that SITS activates the Cl- current through a synergistic effect with ISO. 4,4'-Diisothiocyanostilbene-2,2'-disulfonic acid (DIDS) also enhanced the ISO-activated Cl- current. However, 4,4'-dinitrostilbene-2,2'-disulfonic acid (DNDS) did not have any effect. SITS also exhibited a synergistic effect on the ISO-enhanced Ca2+ current in the same cells, suggesting that it affects the pathway involved in beta-adrenergic regulation of both Cl- and Ca2+ channels. SITS had no effect on the Cl- current stimulated by direct activation of adenylate cyclase with forskolin or exposure to the membrane-permeable cAMP derivative 8-bromoadenosine 3',5'-cyclic monophosphate. This suggests that SITS and DIDS may enhance the ISO-activated Cl- current via an effect on the beta-adrenergic receptor. It is concluded that these stilbenedisulfonic acid derivatives are not effective antagonists of cAMP-activated Cl- channels in cardiac ventricular myocytes.
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pubmed:grant | |
pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/4,4'-Diisothiocyanostilbene-2,2'-Dis...,
http://linkedlifedata.com/resource/pubmed/chemical/4,4'-dinitro-2,2'-stilbenedisulfonic...,
http://linkedlifedata.com/resource/pubmed/chemical/4-Acetamido-4'-isothiocyanatostilben...,
http://linkedlifedata.com/resource/pubmed/chemical/8-Bromo Cyclic Adenosine...,
http://linkedlifedata.com/resource/pubmed/chemical/Calcium Channels,
http://linkedlifedata.com/resource/pubmed/chemical/Chloride Channels,
http://linkedlifedata.com/resource/pubmed/chemical/Cyclic AMP,
http://linkedlifedata.com/resource/pubmed/chemical/Isoproterenol,
http://linkedlifedata.com/resource/pubmed/chemical/Membrane Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Stilbenes
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pubmed:status |
MEDLINE
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pubmed:month |
Feb
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pubmed:issn |
0031-6768
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
422
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
436-42
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pubmed:dateRevised |
2007-11-14
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pubmed:meshHeading |
pubmed-meshheading:8386352-4,4'-Diisothiocyanostilbene-2,2'-Disulfonic Acid,
pubmed-meshheading:8386352-4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic Acid,
pubmed-meshheading:8386352-8-Bromo Cyclic Adenosine Monophosphate,
pubmed-meshheading:8386352-Animals,
pubmed-meshheading:8386352-Calcium Channels,
pubmed-meshheading:8386352-Chloride Channels,
pubmed-meshheading:8386352-Cyclic AMP,
pubmed-meshheading:8386352-Guinea Pigs,
pubmed-meshheading:8386352-Heart,
pubmed-meshheading:8386352-Isoproterenol,
pubmed-meshheading:8386352-Membrane Potentials,
pubmed-meshheading:8386352-Membrane Proteins,
pubmed-meshheading:8386352-Myocardium,
pubmed-meshheading:8386352-Stilbenes
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pubmed:year |
1993
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pubmed:articleTitle |
Effects of stilbenedisulfonic acid derivatives on the cAMP-regulated chloride current in cardiac myocytes.
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pubmed:affiliation |
Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, OH 44106-4970.
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pubmed:publicationType |
Journal Article,
In Vitro,
Research Support, U.S. Gov't, P.H.S.
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