Linked Life Data

7217671

Source:http://linkedlifedata.com/resource/pubmed/id/7217671

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1981-6-13
pubmed:abstractText
Lymphokine-rich supernatants from concanavalin A-stimulated spleen cell cultures failed to activate mouse peritoneal macrophages for tumor cell killing, providing that the assay system was free of detectable (less than 0.125 ng/ml) endotoxin. Instead, increasing amounts of lymphokine progressively increased the sensitivity of macrophages to activation by purified bacterial lipopolysaccharide (LPS). Conversely, the effect of minute amounts of lymphokine could be detected in the presence of relatively high (though nonactivating) concentrations of LPS. The latter observation was exploited to develop a highly sensitive, quantitative assay for lymphokine. In this assay, serially diluted supernatants were tested on macrophage monolayers in the presence of a constant concentration (3 ng/ml) of LPS. Under these conditions, the lymphokine dose-response curve was sigmoidal and therefore suitable for conversion to a linear plot using the logarithmic transformation of the von Krogh equation. Activity could be expressed quantitatively and reproducibly in terms of units of activity. By facilitating purification the assay should contribute to the development of a more precise biochemical understanding of the role of lymphokine in macrophage activation for tumor cell killing.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0022-1767
pubmed:author
pubmed:issnType
Print
pubmed:volume
126
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1863-7
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1981
pubmed:articleTitle
Activation of mouse macrophages for tumor cell killing. I. Quantitative analysis of interactions between lymphokine and lipopolysaccharide.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.