Linked Life Data

11312628

Source:http://linkedlifedata.com/resource/pubmed/id/11312628

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
2001-4-23
pubmed:abstractText
Placental hypoxia, ischaemia, reperfusion and resultant oxidative stress, with the release of various factors into the maternal vasculature acting as mediators of endothelial cell dysfunction, play an important role in the development of pre-eclampsia. Human term placental tissue explants were exposed to different stressors, e.g. hypoxia, oxidative stress and lipopolysaccarides, and the effect on the release of prostanoids and cytokines was determined. The hypoxic environment consisted of 2 per cent O2, 5 per cent CO2and 93 per cent N2. Oxidative stress was induced by addition of xanthine together with xanthine oxidase to the incubation medium. As a third experimental variable, lipopolysaccharide was added to the medium. Prostaglandins (8-iso-PGF(2alpha), or 6-keto-PGF(1alpha)and TXB(2)as stable metabolites of prostacyclin and thromboxane, respectively) and cytokines (TNF-alpha, IL-1alpha, IL-1beta, IL-6) were measured using commercial ELISA assays. Under control conditions, the production of prostaglandins in ng/24 h (mean +/- s.d.) was 6 +/- 3 for 8-iso-PGF(2alpha), 19 +/- 9 for 6-keto-PGF(1alpha)and 5 +/- 2 for TXB2. The production of cytokines was 13 +/- 6 pg for TNF-alpha, 7 +/- 2 pg for IL-1alpha, 5 +/- 3 pg for IL-1beta and 18 +/- 9 ng for IL-6. Under hypoxia the production of prostaglandins remained unchanged and of the cytokines only IL-1beta showed a 15-fold increase. Oxidative stress resulted in an increase in the release of prostaglandins and of cytokines of 4- to 15- and 3- to 130-fold, respectively. Lipopolysaccharides and oxidative stress had a similar effect on the production of prostaglandins, whereas the stimulatory effect of lipopolysaccharides on cytokines was significantly higher than that of oxidative stress.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0143-4004
pubmed:author
pubmed:copyrightInfo
Copyright 2001 IFPA and Harcourt Publishers Ltd.
pubmed:issnType
Print
pubmed:volume
22 Suppl A
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
S45-50
pubmed:dateRevised
2009-11-3
pubmed:meshHeading
pubmed-meshheading:11312628-Adult, pubmed-meshheading:11312628-Anoxia, pubmed-meshheading:11312628-Cell Hypoxia, pubmed-meshheading:11312628-Chorionic Villi, pubmed-meshheading:11312628-Culture Techniques, pubmed-meshheading:11312628-Cyclooxygenase Inhibitors, pubmed-meshheading:11312628-Cytokines, pubmed-meshheading:11312628-Drug Interactions, pubmed-meshheading:11312628-Enzyme-Linked Immunosorbent Assay, pubmed-meshheading:11312628-Female, pubmed-meshheading:11312628-Humans, pubmed-meshheading:11312628-Indomethacin, pubmed-meshheading:11312628-Lipopolysaccharides, pubmed-meshheading:11312628-Nitrobenzenes, pubmed-meshheading:11312628-Oxidative Stress, pubmed-meshheading:11312628-Oxygen, pubmed-meshheading:11312628-Pregnancy, pubmed-meshheading:11312628-Prostaglandins, pubmed-meshheading:11312628-Sulfonamides, pubmed-meshheading:11312628-Xanthine, pubmed-meshheading:11312628-Xanthine Oxidase
pubmed:year
2001
pubmed:articleTitle
Effect of hypoxia, oxidative stress and lipopolysaccharides on the release of prostaglandins and cytokines from human term placental explants.
pubmed:affiliation
Department of Obstetrics and Gynecology, University of Berne, Inselspital, Switzerland.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't