Linked Life Data

7882905

Source:http://linkedlifedata.com/resource/pubmed/id/7882905

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1995-4-10
pubmed:abstractText
PolyI:C, a potent interferon (IFN) inducer, protects the isolated perfused lung (IPL) against platelet-activating factor (PAF)-induced injury. Because the release of PAF is stimulated by tumor necrosis factor (TNF), this study was designed to measure the effects of polyI:C on TNF-induced lung inflammation and injury. TNF (2.5 micrograms/kg) was administered to rabbits intravenously as continuous infusion over 2 h. PolyI:C was given intraperitoneally 16 h before TNF infusion. The rabbits were then anesthetized and sacrificed, and the lungs were ventilated with 20% O2 + 5% CO2 and perfused with buffer for 60 min. Lung weight gain was recorded continuously. After perfusion, lungs were inflation fixed for light and electron microscopy with morphometric analysis. Four groups of rabbit lungs were studied: (1) control; (2) polyI:C; (3) TNF, and (4) polyI:C + TNF. Lungs in the TNF group showed increased weight gain (15.4 +/- 2.4 g/h vs. 7.1 +/- 0.5 g/h in controls, p = .02) and increased volume of inflammatory cells (261% of control). These were mostly mononuclear cells (96%), primarily located in the interstitial and alveolar compartments (80%). In the polyI:C + TNF group, the weight gain of the IPL tended to be smaller (8.3 +/- 1.8 g/h, p = .08). Total inflammatory cell volume in the IPL remained elevated (330% of control), but mononuclear cells accounted for only 60% of the cell population. Most of these cells were found in the intravascular compartment (65%) implicating mononuclear cells in the early pathogenesis of TNF-induced pulmonary capillary injury in rabbits. PolyI:C, which attenuates TNF-induced injury, also modulates effects of TNF on mononuclear cell and granulocyte infiltration in the lung.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0190-2148
pubmed:author
pubmed:issnType
Print
pubmed:volume
20
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
539-58
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:articleTitle
Tumor necrosis factor-alpha-induced lung injury and its modulation by synthetic polynucleotide: a physiologic-morphometric analysis.
pubmed:affiliation
Department of Medicine, Duke University Medical Center, Durham, North Carolina 27710.
pubmed:publicationType
Journal Article, In Vitro, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't