Linked Life Data

8874146

Source:http://linkedlifedata.com/resource/pubmed/id/8874146

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1997-1-15
pubmed:abstractText
Myocardial Na+,K(+)-ATPase is reduced in congestive heart failure. To study the regulation of Na+,K(+)-ATPase in congestive heart failure, we performed Western and Northern blot analyses of ventricular myocardium of dogs with pacing-induced congestive heart failure and chronic norepinephrine infusion, using isoform-specific antibodies and cDNA probes. Congestive heart failure and norepinephrine infusion caused similar increases in myocardial interstitial norepinephrine concentration and reductions of myocardial Na+,K(+)-ATPase alpha 3-subunit protein, but differed in their effects on myocardial Na+,K(+)-ATPase alpha 3-subunit gene expression. Chronic norepinephrine infusion produced no changes in the steady-state mRNA level for the alpha 3-subunit of Na+,K(+)-ATPase, suggesting that the changes in Na+,K(+)-ATPase protein were induced via a post-transcriptional mechanism. In contrast, down-regulation of the Na+,K(+)-ATPase alpha 3-subunit in the failing heart was accompanied by a decreased alpha 3-subunit mRNA level, indicating the presence of a transcriptional event. The alpha 1-subunit protein content and mRNA level were not affected by either norepinephrine infusion or rapid ventricular pacing. We conclude that, while elevated myocardial interstitial norepinephrine levels may contribute substantially to the down-regulation of the Na+,K(+)-ATPase alpha 3-subunit in the failing myocardium, additional regulatory factors are responsible for the decreased myocardial alpha 3-subunit mRNA expression in congestive heart failure.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0014-2999
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
309
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
235-41
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Elevated myocardial interstitial norepinephrine concentration contributes to the regulation of Na+,K(+)-ATPase in heart failure.
pubmed:affiliation
Department of Medicine, University of Rochester Medical Center, NY 14642, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't