Linked Life Data

16337960

Source:http://linkedlifedata.com/resource/pubmed/id/16337960

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2006-1-31
pubmed:abstractText
Nitric oxide plays a crucial role in myocardial ischemia reperfusion injury as well as in myocardial adaptation to ischemic stress. To understand the dichotomy of nitric oxide behavior in the ischemic myocardium, isolated rat hearts were subjected to ischemia/reperfusion protocol. The tissue contents of sphingomyelin (SM), ceramide and sphingosine were determined by high performance thin layer chromatography (HPTLC). The myocardial plasma proteins were immunoprecipitated with caveolin-1 specific antibody. Ischemia/reperfusion resulted in the breakdown of SM with corresponding accumulation of ceramide and sphingosine. Immunoprecipitation with eNOS-specific antibody revealed the association of eNOS with caveolin-1 fraction of the heart. Ischemia/reperfusion caused a depression of contractile function and an increased apoptotic cell death and myocardial infarct size, which were reversed by pre-perfusing the hearts with desipramine, an sphingomyelinase inhibitor that also prevented ceramide accumulation and eNOS association with caveolin-1. The similar results were obtained when the hearts were adapted to ischemic stress by subjecting them to repeated reversible ischemia and reperfusion. The results indicate that ischemia/reperfusion causes an increase in eNOS, which is unavailable to the ischemic heart because of its binding with caveolin-1. Ceramide plays a crucial role in this process, because prevention of ceramide formation either by myocardial adaptation to ischemia or with desipramine results in the inhibition of eNOS association with caveolin-1 thereby reducing myocardial ischemic reperfusion injury.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0022-2828
pubmed:author
pubmed:issnType
Print
pubmed:volume
40
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
313-20
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Role of lipid rafts in ceramide and nitric oxide signaling in the ischemic and preconditioned hearts.
pubmed:affiliation
Cardiovascular Research Center, University of Connecticut School of Medicine, Farmington, CT 06030-1110, USA.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, N.I.H., Extramural