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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
3
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pubmed:dateCreated |
2010-4-5
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pubmed:abstractText |
The pathophysiological relevance of S-nitrosoglutathione (GSNO)-induced endothelial cell injury remains unclear. The main objective of this study was to elucidate the molecular mechanisms of GSNO-induced oxidative stress in endothelial cells. Morphological evaluation through DAPI staining and propidium iodide (PI) flow cytometry was used to detect apoptosis. In cultured EA.hy926 endothelial cells, exposure to GSNO led to a time- and dose-dependent apoptotic cascade. When intracellular reactive oxygen species (ROS) production was measured in GSNO-treated cells with the fluorescent probes 5-(and-6)-carboxy-2',7'-dichlorofluorescein diacetate, we observed elevated ROS levels and a concomitant loss in mitochondrial membrane potential, indicating that GSNO-induced death signaling is mediated through a ROS-mitochondrial pathway. Importantly, we found that peroxynitrite formation and Omi/HtrA2 release from mitochondria were involved in this phenomenon, whereas changes of death-receptor dependent signaling were not detected in the same context. The inhibition of NADPH oxidase activation and Omi/HtrA2 by a pharmacological approach provided significant protection against caspase-3 activation and GSNO-induced cell death, confirming that GSNO triggers the death cascade in endothelial cells in a mitochondria-dependent manner. Taken together, our results indicate that ROS overproduction and loss of mitochondrial Omi/HtrA2 play a pivotal role in reactive nitrogen species-induced cell death, and the modulation of these pathways can be of significant therapeutic benefit.
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pubmed:commentsCorrections |
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Acetophenones,
http://linkedlifedata.com/resource/pubmed/chemical/Cyclic N-Oxides,
http://linkedlifedata.com/resource/pubmed/chemical/Cytotoxins,
http://linkedlifedata.com/resource/pubmed/chemical/Mitochondrial Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/NADPH Oxidase,
http://linkedlifedata.com/resource/pubmed/chemical/Nitric Oxide,
http://linkedlifedata.com/resource/pubmed/chemical/Omi serine protease,
http://linkedlifedata.com/resource/pubmed/chemical/Peroxynitrous Acid,
http://linkedlifedata.com/resource/pubmed/chemical/Pyrimidinones,
http://linkedlifedata.com/resource/pubmed/chemical/Reactive Oxygen Species,
http://linkedlifedata.com/resource/pubmed/chemical/S-Nitrosoglutathione,
http://linkedlifedata.com/resource/pubmed/chemical/Serine Endopeptidases,
http://linkedlifedata.com/resource/pubmed/chemical/Spin Labels,
http://linkedlifedata.com/resource/pubmed/chemical/Thiones,
http://linkedlifedata.com/resource/pubmed/chemical/UCF 101,
http://linkedlifedata.com/resource/pubmed/chemical/acetovanillone,
http://linkedlifedata.com/resource/pubmed/chemical/tempol
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pubmed:status |
MEDLINE
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pubmed:month |
May
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pubmed:issn |
1096-0333
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pubmed:author |
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pubmed:copyrightInfo |
Copyright 2010 Elsevier Inc. All rights reserved.
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pubmed:issnType |
Electronic
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pubmed:day |
1
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pubmed:volume |
244
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
374-84
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pubmed:dateRevised |
2010-7-23
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pubmed:meshHeading |
pubmed-meshheading:20153346-Acetophenones,
pubmed-meshheading:20153346-Apoptosis,
pubmed-meshheading:20153346-Cell Line,
pubmed-meshheading:20153346-Cell Survival,
pubmed-meshheading:20153346-Cyclic N-Oxides,
pubmed-meshheading:20153346-Cytotoxins,
pubmed-meshheading:20153346-Endothelial Cells,
pubmed-meshheading:20153346-Humans,
pubmed-meshheading:20153346-Mitochondria,
pubmed-meshheading:20153346-Mitochondrial Proteins,
pubmed-meshheading:20153346-NADPH Oxidase,
pubmed-meshheading:20153346-Nitric Oxide,
pubmed-meshheading:20153346-Oxidative Stress,
pubmed-meshheading:20153346-Peroxynitrous Acid,
pubmed-meshheading:20153346-Pyrimidinones,
pubmed-meshheading:20153346-Reactive Oxygen Species,
pubmed-meshheading:20153346-S-Nitrosoglutathione,
pubmed-meshheading:20153346-Serine Endopeptidases,
pubmed-meshheading:20153346-Signal Transduction,
pubmed-meshheading:20153346-Spin Labels,
pubmed-meshheading:20153346-Thiones
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pubmed:year |
2010
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pubmed:articleTitle |
The induction of reactive oxygen species and loss of mitochondrial Omi/HtrA2 is associated with S-nitrosoglutathione-induced apoptosis in human endothelial cells.
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pubmed:affiliation |
Institute of Pharmacology, Toxicology and Biochemical Pharmaceutics, Zhejiang University, Hangzhou, 310058, China.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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