rdf:type |
|
lifeskim:mentions |
umls-concept:C0001480,
umls-concept:C0024432,
umls-concept:C0025914,
umls-concept:C0026809,
umls-concept:C0205101,
umls-concept:C0205171,
umls-concept:C0439799,
umls-concept:C0851827,
umls-concept:C1413043,
umls-concept:C1701901,
umls-concept:C1879547
|
pubmed:issue |
2
|
pubmed:dateCreated |
1990-9-11
|
pubmed:abstractText |
Single Ca2(+)-dependent K+ currents responding to external ATP were recorded from cell-attached patches on mouse peritoneal macrophages. Extracellularly applied ATP activated an inward single-channel current with a conductance of 25 pS and a reversal potential of -79 mV (pipette potential, Vp) when the pipette contained a 145 mM KCl solution. The reversal potential was shifted 56 mV positive by a 10-fold reduction in external (pipette) K+ concentration. The effect of ATP was abolished by either removal of external Ca2+ or treatment with an intracellular Ca2+ chelator, the acetoxymethyl ester of 1,2-bis (2-aminophenoxy)ethane-N,N,N'N'-tetraacetic acid (BAPTA-AM). This channel has a mean open time of 9.1 ms and open probability was not strongly dependent on Vp in the range tested (+120 to -30 mV).
|
pubmed:language |
eng
|
pubmed:journal |
|
pubmed:citationSubset |
IM
|
pubmed:chemical |
|
pubmed:status |
MEDLINE
|
pubmed:month |
Jul
|
pubmed:issn |
0014-5793
|
pubmed:author |
|
pubmed:issnType |
Print
|
pubmed:day |
16
|
pubmed:volume |
267
|
pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
|
pubmed:pagination |
281-4
|
pubmed:dateRevised |
2006-11-15
|
pubmed:meshHeading |
pubmed-meshheading:2116324-Adenosine Triphosphate,
pubmed-meshheading:2116324-Animals,
pubmed-meshheading:2116324-Calcium,
pubmed-meshheading:2116324-Cells, Cultured,
pubmed-meshheading:2116324-Chelating Agents,
pubmed-meshheading:2116324-Egtazic Acid,
pubmed-meshheading:2116324-Electric Conductivity,
pubmed-meshheading:2116324-Intracellular Membranes,
pubmed-meshheading:2116324-Ion Channel Gating,
pubmed-meshheading:2116324-Macrophages,
pubmed-meshheading:2116324-Mice,
pubmed-meshheading:2116324-Potassium Channels
|
pubmed:year |
1990
|
pubmed:articleTitle |
Activation of single Ca2(+)-dependent K+ channel by external ATP in mouse macrophages.
|
pubmed:affiliation |
Department of Physiology, Shimane Medical University, Izumo, Japan.
|
pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
|