Linked Life Data

7521367

Source:http://linkedlifedata.com/resource/pubmed/id/7521367

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1994-10-5
pubmed:abstractText
C3H/HeJ (Lpsd) macrophages have been shown to respond to certain LPSs, especially from rough mutant bacteria. C3H/OuJ (Lpsn) macrophages are induced by wild-type LPS, rough LPS, or lipid A to express many genes, including TNF-alpha, TNFR-2, IL-1 beta, IP-10, D3, and D8. C3H/HeJ macrophages failed to induce any of these genes when cultured with wild-type LPS or synthetic lipid A, even when pretreated with IFN-gamma. However, rough mutant Salmonella minnesota Ra, Rc, and Rd LPS, and Escherichia coli D31 m3 Rd LPS induced Lpsd macrophages to express a subset of genes within the gene panel. Because bioactive preparations contained trace quantities of endotoxin protein(s), a deoxycholate-modified, phenol-water method was used to repurify rough LPS into an aqueous phase, and extract endotoxin proteins into a phenol phase. Repurified LPS failed to stimulate Lpsd macrophages; however, phenol fractions were approximately 10% as potent in Lpsd macrophages as crude rough LPS. Full potency was restored in C3H/HeJ macrophages when aqueous phase LPS and phenol-phase proteins were co-precipitated, suggesting that LPS and endotoxin proteins interact synergistically. Endotoxin proteins alone induced TNF-alpha, TNFR-2, and IL-1 beta, but not IP-10, D3, and D8 genes in both Lpsd and Lpsn macrophages. Tyrosine phosphorylation of three 41- to 47-kDa proteins was induced by endotoxin proteins, but not by LPS, in Lpsd macrophages. Thus, endotoxin proteins seem to activate a signaling pathway(s) that converges (distal to the Lps gene product) with a subset of LPS-signaling pathways.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0022-1767
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
153
pubmed:geneSymbol
Lps
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2653-63
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1994
pubmed:articleTitle
Endotoxin-induced early gene expression in C3H/HeJ (Lpsd) macrophages.
pubmed:affiliation
Department of Microbiology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.