| pubmed-article:9915771 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:9915771 | lifeskim:mentions | umls-concept:C0028128 | lld:lifeskim |
| pubmed-article:9915771 | lifeskim:mentions | umls-concept:C0225828 | lld:lifeskim |
| pubmed-article:9915771 | lifeskim:mentions | umls-concept:C0162638 | lld:lifeskim |
| pubmed-article:9915771 | lifeskim:mentions | umls-concept:C0288331 | lld:lifeskim |
| pubmed-article:9915771 | lifeskim:mentions | umls-concept:C1332397 | lld:lifeskim |
| pubmed-article:9915771 | lifeskim:mentions | umls-concept:C1709059 | lld:lifeskim |
| pubmed-article:9915771 | pubmed:issue | 1 | lld:pubmed |
| pubmed-article:9915771 | pubmed:dateCreated | 1999-2-12 | lld:pubmed |
| pubmed-article:9915771 | pubmed:abstractText | -Cytokine-induced NO production depresses myocardial contractility and has been shown to be cytotoxic to cardiac myocytes. However, the mechanisms of cytokine-induced cardiac myocyte cell death are unclear. To analyze these mechanisms in detail, we treated neonatal cardiac myocytes in serum-free culture with a combination of the macrophage-derived cytokines interleukin-1beta, tumor necrosis factor-alpha, and interferon-gamma. These cytokines caused a time-dependent induction of cardiac myocyte apoptosis, but not necrosis, beginning 72 hours after treatment, as determined by nuclear morphology, DNA internucleosomal cleavage, and cleavage of poly(ADP-ribose) polymerase, reflecting caspase activation. Apoptosis was preceded by a >50-fold induction of inducible NO synthase mRNA and the release of large amounts (5 to 8 nmol/ microgram protein) of NO metabolites (NOx) into the medium. Cell death was completely blocked by an NO synthase inhibitor and attenuated by antioxidants (N-acetylcysteine and DTT) and the caspase inhibitor ZVAD-fmk. Cytokines also mediated an NO-dependent, sustained increase in myocyte expression of the Bcl-2 homologs Bak and Bcl-x(L). The NO donor S-nitrosoglutathione also induced apoptosis and cell levels of Bak, but not of Bcl-x(L). All effects of cytokines, including poly(ADP-ribose) polymerase cleavage, could be attributed to interleukin-1beta; interferon-gamma and tumor necrosis factor-alpha had no independent effects on apoptosis or on NOx production. We conclude that cytokine toxicity to neonatal cardiac myocytes results from the induction of NO and subsequent activation of apoptosis, at least in part through the generation of oxygen free radicals. The rate and extent of this apoptosis is modulated by alterations in the cellular balance of Bak and Bcl-x(L), which respond differentially to cytokine-induced and exogenous NO and by the availability of oxidant species. | lld:pubmed |
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| pubmed-article:9915771 | pubmed:language | eng | lld:pubmed |
| pubmed-article:9915771 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:9915771 | pubmed:citationSubset | IM | lld:pubmed |
| pubmed-article:9915771 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
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| pubmed-article:9915771 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:9915771 | pubmed:issn | 0009-7330 | lld:pubmed |
| pubmed-article:9915771 | pubmed:author | pubmed-author:DzauV JVJ | lld:pubmed |
| pubmed-article:9915771 | pubmed:author | pubmed-author:BishopricN... | lld:pubmed |
| pubmed-article:9915771 | pubmed:author | pubmed-author:WebsterK AKA | lld:pubmed |
| pubmed-article:9915771 | pubmed:author | pubmed-author:ZannMM | lld:pubmed |
| pubmed-article:9915771 | pubmed:author | pubmed-author:IngD JDJ | lld:pubmed |
| pubmed-article:9915771 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:9915771 | pubmed:volume | 84 | lld:pubmed |
| pubmed-article:9915771 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:9915771 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:9915771 | pubmed:pagination | 21-33 | lld:pubmed |
| pubmed-article:9915771 | pubmed:dateRevised | 2011-11-17 | lld:pubmed |
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| pubmed-article:9915771 | pubmed:articleTitle | Modulation of cytokine-induced cardiac myocyte apoptosis by nitric oxide, Bak, and Bcl-x. | lld:pubmed |
| pubmed-article:9915771 | pubmed:affiliation | Departments of Molecular and Cellular Pharmacology and Medicine, University of Miami School of Medicine, Miami, Florida, USA. Medicine, | lld:pubmed |
| pubmed-article:9915771 | pubmed:publicationType | Journal Article | lld:pubmed |
| pubmed-article:9915771 | pubmed:publicationType | Research Support, U.S. Gov't, P.H.S. | lld:pubmed |
| pubmed-article:9915771 | pubmed:publicationType | Research Support, Non-U.S. Gov't | lld:pubmed |
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