Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1991-1-10
pubmed:abstractText
The Na(+)-activated K+ current was studied in inside-out patches and in whole cells isolated from the guinea-pig cardiac ventricle. The single channel conductance showed inward rectification for K+i less than K+e, but outward rectification for K+i greater than K+e. The open probability was dependent on Na+i and Na+,K(+)-pump activity. In the presence of pump blockade the channel remained active at low Na+i. Similar results were obtained in whole cells. These results suggest the existence of Na+ gradients depending on Na+,K(+)-pump activity and passive inward leak of Na+. The channel and whole cell current were blocked by R56865. The drug did not change the single channel conductance but markedly reduced open probability by shortening burst duration. The current may play an important role in action potential shortening during pump blockade.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0031-6768
pubmed:author
pubmed:issnType
Print
pubmed:volume
416
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
766-8
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
Na(+)-activated K+ current in cardiac cells: rectification, open probability, block and role in digitalis toxicity.
pubmed:affiliation
Laboratory of Physiology, University of Leuven, Belgium.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't