Linked Life Data

11969249

Source:http://linkedlifedata.com/resource/pubmed/id/11969249

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2002-4-23
pubmed:abstractText
Store-operated Ca2+ entry (SOCE) is the Ca2+ influx that is activated on depletion of intracellular Ca2+ stores. Although SOCE is found in a variety of cell types, its activation mechanism and molecular identity remain to be clarified. Current experimental results suggest that SOCE channels are activated by direct coupling with Ca2+ release channels on depleted stores. Here we report SOCE in cardiac myocytes, that was prominently sensitive to Zn2+ but resistant to inhibitors for voltage-dependent Ca2+ channels and Na+/Ca2+ exchangers. The SOCE activity may be developmentally regulated, because the SOCE was easily detected during embryonic and neonatal stages but not in mature myocytes from adult hearts. In cardiac myocytes, ryanodine receptor type 2 (RyR-2) is thought to be the sole Ca2+ release channel on the intracellular store, and junctophilin type 2 (JP-2) contributes to formation of the junctional complex between the cell surface and store membranes. Using the knockout mice, we also examined possible involvement of the Ca2+ release channel and junctional membrane complex in cardiac SOCE. Apparently normal SOCE activities were retained in mutant myocytes lacking RyR-2 or JP-2, suggesting that neither the Ca2+ release channel nor junctional membrane complex is involved in activation of cardiac SOCE.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0143-4160
pubmed:author
pubmed:copyrightInfo
Copyright 2002 Elsevier Science Ltd. All rights reserved.
pubmed:issnType
Print
pubmed:volume
31
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
89-96
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Store-operated Ca2+ entry uncoupled with ryanodine receptor and junctional membrane complex in heart muscle cells.
pubmed:affiliation
Department of Physiology, Fukuoka University, 7-45-1 Nanakuma, Jonan-ku, Fukuoka, Japan. ueharaak@fukuoka-u.ac.jp
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't