Linked Life Data

8599844

Source:http://linkedlifedata.com/resource/pubmed/id/8599844

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1996-4-30
pubmed:abstractText
The effects of the inflammatory mediators lipopolysaccharide (LPS) and tumor necrosis factor-alpha (TNF) and unstimulated and activated neutrophils (PMNs) on endothelial cell (EC) necrosis were studied using the cultured human EC line (ECV-304) and human PMNs in vitro. LPS and TNF alone or their combination failed to induce EC necrosis. Activated PMNs, as evidenced by augmentations in CD11b expression and respiratory burst, induced significant EC necrosis commencing at 12 hr of coculture, which was strongly dependent on the ratio of PMN:ECs and the duration of PMN:EC coculture. In contrast, unstimulated PMNs induced no significant increases in EC necrosis. To examine the mechanisms of activated PMN-mediated EC necrosis, the oxygen radical scavengers superoxide dismutase (SOD) and catalase, as well as the protease inhibitors phenylmethylsulfonyl fluoride (PMSF), alpha 1-antitrypsin (alpha 1-AT), soybean trypsin-chymotrypsin inhibitor (TCI), and aprotinin, were studied in coculture experiments. EC necrosis induced by activated PMNs could be markedly attenuated by SOD, PMSF, alpha 1-AT, TCI, aprotinin, or their combinations. Although aprotinin enhanced respiratory burst, this agent inhibited necrosis by downregulating PMN CD11b and PMN-EC adhesion. These results demonstrate that the inflammatory mediators LPS and TNF and quiescent PMNs fail to induce EC necrosis. However, PMNs activated by inflammatory mediators can induce EC necrosis through oxidative and nonoxidative mechanisms and this process is dependent on PMN-EC adhesion.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0008-8749
pubmed:author
pubmed:issnType
Print
pubmed:day
25
pubmed:volume
168
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
91-9
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Mechanisms involved in the induction of human endothelial cell necrosis.
pubmed:affiliation
Department of Surgery, The Royal College of Surgeons in Ireland, Beaumont Hospital, Dublin.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't