Linked Life Data

17638544

Source:http://linkedlifedata.com/resource/pubmed/id/17638544

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
2007-8-6
pubmed:abstractText
We have demonstrated that the formation of lipid raft (LR)-redox signaling platforms membrane is associated with activation of acid sphingomyelinase (ASMase) in coronary arterial endothelial cells (CAECs). Given that the trafficking of lysosomal vesicles might play an essential role in ASMase activation, the present study tested whether lysosomal vesicles contribute to the formation of LR redox signaling platforms. By confocal microscopy, we found that Fas ligand (FasL) induced the formation of LR clusters in the plasma membrane of CAECs, accompanied by aggregation of NAD(P)H oxidase subunits, gp91phox and p47phox, and ROS production. When the cells were pretreated with two structurally different lysosomal vesicle function inhibitors, bafilomycin A1 (Baf) and glycyl-L-phenylalanine-beta-naphthylamide (GPN), the FasL-induced LRs clustering was substantially blocked, and corresponding ROS production significantly decreased. By confocal microscopic observations in living CAECs by using LysoTracker, a colocalization of LRs and lysosomal vesicles was found around the cell membrane, which was abolished by Baf or GPN. Functionally, FasL-induced inhibition of endothelium-dependent vasorelaxation was also reduced by both inhibitors of lysosome function. These results suggest that lysosomal vesicles importantly contribute to the formation of LR-redox signaling platforms and thereby participate in the oxidative injury of endothelial function during activation of death receptor-Fas in coronary arteries.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
1523-0864
pubmed:author
pubmed:issnType
Print
pubmed:volume
9
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1417-26
pubmed:dateRevised
2007-12-3
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Contribution of lysosomal vesicles to the formation of lipid raft redox signaling platforms in endothelial cells.
pubmed:affiliation
Department of Pharmacology & Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, Virginia 23298, USA.
pubmed:publicationType
Journal Article, Research Support, N.I.H., Extramural