Linked Life Data

11779401

Source:http://linkedlifedata.com/resource/pubmed/id/11779401

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
18
pubmed:dateCreated
2002-1-7
pubmed:abstractText
The purpose of this study was to investigate the effectiveness of superoxide dismutase (SOD) overexpression in an acute model of hepatic oxidative stress. Oxidative stress was established using a warm ischemia-reperfusion model, where nearly 70% of the liver was made hypoxic by clamping the hepatic artery and a branch of the portal vein for 1 hr followed by restoration of blood flow. Animals were infected i.v. with 1 x 10(9) plaque-forming units (PFU) of adenovirus containing the transgene for cytosolic Cu/Zn-SOD (Ad.SOD1), mitochondrial Mn-SOD (Ad.SOD2), extracellular Cu/Zn-SOD (Ad.SOD3), or the bacterial reporter gene for beta-galactosidase (Ad.lacZ) 3 days prior to experiments. Ad.SOD1 and Ad.SOD2 caused a three-fold increase in SOD expression and activity in liver compared to Ad.lacZ-treated control animals. Intravenous administration of Ad.SOD3 increased SOD activity slightly in serum but not in liver. Increases in serum transaminases and pathology due to ischemia-reperfusion were blunted by Ad.SOD1 and Ad.SOD2; however, extracellular SOD had no significant effect. Moreover, lipid-derived free radical adducts (a(N) = 15.65 G and a(H)(beta) = 2.78 G) were increased by ischemia-reperfusion. This effect was blunted by about 60% in Ad.SOD1- and Ad.SOD2-infected animals, but was unaffected by Ad.SOD3. However, when high doses of Ad.SOD3 (3 x 10(10) PFU) were administered. serum SOD activity was elevated three-fold and was protective against hepatic ischemia-reperfusion injury under these conditions. These data demonstrate that adenoviral delivery of superoxide dismutase can effectively reduce hepatic oxidative stress.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
1043-0342
pubmed:author
pubmed:issnType
Print
pubmed:day
10
pubmed:volume
12
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2167-77
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
Comparison of the effect of adenoviral delivery of three superoxide dismutase genes against hepatic ischemia-reperfusion injury.
pubmed:affiliation
Department of Pharmacology and Center for Alcohol Studies, CB #7365 Mary Ellen Jones Bldg., University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA. wheelmi@med.unc.edu
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S.