Linked Life Data

11194055

Source:http://linkedlifedata.com/resource/pubmed/id/11194055

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2001-2-2
pubmed:abstractText
Nitric oxide (NO) has been shown to decrease cardiac performance, induce global hypotension, and generate oxygen free-radicals. Nitric oxide is produced from the conversion of L-arginine to L-citrulline by inducible nitric oxide synthase (iNOS) and is a component of many cellular second messenger systems. It is not clearly understood if NO and iNOS are compensatory mechanisms or pathological processes in heart failure, and this study was designed to understand better inhibition of iNOS in a cell culture model. Inhibitors of iNOS were compared for in vitro capability of inhibiting the production of NO. Ethanol and S-methylisothiourea (MITU) were applied to macrophage populations in 120 microM and 1 microM, 100 and 10 nM for an 8-h incubation. Level of iNOS expression was measured in the ethanol-treated populations using an anti-iNOS primary antibody with a fluorescent labeled secondary antibody. Serum nitrites were measured in both treatment groups by the nonenzymatic Griess method to determine enzyme function. Our data indicate that ethanol demonstrates a stimulation and simultaneous inhibition of iNOS during an 8-h incubation. No dose-dependent correlation between amount of serum nitrites produced and ethanol treatment was observed. However, MITU demonstrated a clear inhibition of iNOS at 120 microM with a serum nitrite value of 25.7002 +/- 0.0647, with control values of 24.3421 microM. Lower concentrations of MITU also demonstrated no correlation. Although both agents display inhibitory effects upon iNOS, MITU seems to have no apparent simultaneous stimulation and may hold more potential as a post-translational inhibitor of iNOS.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
T
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0022-1058
pubmed:author
pubmed:issnType
Print
pubmed:volume
32
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
190-5
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
In vitro comparison of inhibitors of inducible nitric oxide synthase in a macrophage model.
pubmed:affiliation
Graduate Program in Circulatory Sciences, University of Arizona, Tucson, Arizona 85724, USA.
pubmed:publicationType
Journal Article, Comparative Study, In Vitro