Linked Life Data

12235132

Source:http://linkedlifedata.com/resource/pubmed/id/12235132

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
2002-11-18
pubmed:abstractText
The nuclear factor-kappaB (NF-kappaB) is an important transcription factor necessary for initiating and sustaining inflammatory and immune reactions. The inducers of NF-kappaB are well characterized, but the molecular mechanisms underlying multiple in vivo NF-kappaB activation processes are poorly understood. The injection of lipopolysaccharide resulted in a biphasic activation of NF-kappaB during the 18-h observation period in various organs of mice. The early and late phases of NF-kappaB activation occurred at 0.5-2 h and 8-12 h, respectively. Platelet-activating factor, which is released in response to lipopolysaccharide injection, was responsible for the activation of the early phase of NF-kappaB. The early NF-kappaB activity led to the induction of proinflammatory cytokines, tumor necrosis factor (TNF), and interleukin (IL)-1beta, which are known to be efficient inducers of NF-kappaB. Using the TNF knockout and IL-1 receptor knockout mice, we found that TNF and IL-1beta had a role in the second phase activation of NF-kappaB. These cytokines did promote the synthesis of platelet-activating factor, which in turn induced the secondary activation of NF-kappaB. These observations describe a novel autoregulatory molecular mechanism for the biphasic activation of NF-kappaB.
pubmed:language
eng
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:author
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
44715-21
pubmed:dateRevised
2006-11-15
pubmed:articleTitle
Molecular mechanisms for lipopolysaccharide-induced biphasic activation of nuclear factor-kappa B (NF-kappa B).
pubmed:affiliation
Department of Biological Sciences, College of Natural Sciences, The Institute of Basic Sciences, Chonnam National University, Kwangju 500-757, Republic of Korea.