Switch to
| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
1
|
| pubmed:dateCreated |
1999-1-21
|
| pubmed:abstractText |
Peroxynitrite is a potent oxidant generated from the reaction of nitric oxide (NO) and superoxide anion (O2-), both of which can be produced in inflammatory tissues. In these studies, we analyzed what direct effect peroxynitrite had on neutrophil (PMN) function. We found that peroxynitrite was an effective priming agent for PMNs, as demonstrated by enhanced O2- production on subsequent activation with low doses of PMA or N-formyl-methionine-leucine-phenylalanine (fMLF), changes in the expression of PMN surface markers (L-selectin, Mac-1, flavocytochrome b, and fMLF receptor), and increased intracellular calcium levels. Analysis of the mechanism of PMN priming by peroxynitrite demonstrated that peroxynitrite resulted in minimal oxidation of protein sulfhydryl groups and subsequent protein cross-linking. In contrast, treatment of PMNs with peroxynitrite resulted in significant nitration of tyrosine residues on neutrophil proteins. In addition, inhibition of tyrosine nitration with a pyrrolopyrimidine antioxidant blocked the majority of peroxynitrite-induced priming effects, further suggesting that PMN priming was mediated primarily by nitration of tyrosine residues on PMN proteins. The ability of peroxynitrite to serve as an effective priming agent for PMNs at sites of inflammation may play a key role in modulating the host-defense process.
|
| pubmed:grant | |
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Antioxidants,
http://linkedlifedata.com/resource/pubmed/chemical/Blood Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Calcium,
http://linkedlifedata.com/resource/pubmed/chemical/N-Formylmethionine...,
http://linkedlifedata.com/resource/pubmed/chemical/Nitrates,
http://linkedlifedata.com/resource/pubmed/chemical/Oxidants,
http://linkedlifedata.com/resource/pubmed/chemical/Pyrimidines,
http://linkedlifedata.com/resource/pubmed/chemical/Pyrrolidines,
http://linkedlifedata.com/resource/pubmed/chemical/Superoxides,
http://linkedlifedata.com/resource/pubmed/chemical/Tetradecanoylphorbol Acetate,
http://linkedlifedata.com/resource/pubmed/chemical/Tyrosine,
http://linkedlifedata.com/resource/pubmed/chemical/U 101033E,
http://linkedlifedata.com/resource/pubmed/chemical/peroxynitric acid
|
| pubmed:status |
MEDLINE
|
| pubmed:month |
Jan
|
| pubmed:issn |
0741-5400
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
65
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
59-70
|
| pubmed:dateRevised |
2007-11-14
|
| pubmed:meshHeading |
pubmed-meshheading:9886247-Antioxidants,
pubmed-meshheading:9886247-Blood Proteins,
pubmed-meshheading:9886247-Calcium,
pubmed-meshheading:9886247-Cells, Cultured,
pubmed-meshheading:9886247-Humans,
pubmed-meshheading:9886247-Inflammation,
pubmed-meshheading:9886247-N-Formylmethionine Leucyl-Phenylalanine,
pubmed-meshheading:9886247-Neutrophils,
pubmed-meshheading:9886247-Nitrates,
pubmed-meshheading:9886247-Oxidants,
pubmed-meshheading:9886247-Pyrimidines,
pubmed-meshheading:9886247-Pyrrolidines,
pubmed-meshheading:9886247-Stimulation, Chemical,
pubmed-meshheading:9886247-Superoxides,
pubmed-meshheading:9886247-Tetradecanoylphorbol Acetate,
pubmed-meshheading:9886247-Tyrosine
|
| pubmed:year |
1999
|
| pubmed:articleTitle |
Priming of human neutrophils by peroxynitrite: potential role in enhancement of the local inflammatory response.
|
| pubmed:affiliation |
Department of Veterinary Molecular Biology, Montana State University, Bozeman 59717, USA.
|
| pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.,
Research Support, U.S. Gov't, Non-P.H.S.,
Research Support, Non-U.S. Gov't
|