Linked Life Data

18263703

Source:http://linkedlifedata.com/resource/pubmed/id/18263703

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
2008-7-2
pubmed:abstractText
Epidermal keratinocytes (KCs) express antimicrobial peptides as a part of the innate immune response. It has recently been shown that the culture supernatant of Escherichia coli induces the expression of S100A7c (psoriasin) in KCs and that S100A7c efficiently kills E. coli. Here we have investigated which of the microbial components triggers the up-regulation of S100A7c expression. Exposure of human primary KCs to ligands of the human Toll-like receptors (TLRs) revealed that only the TLR5 ligand flagellin strongly induced the expression of S100A7c mRNA and protein, whereas all other TLR ligands had no significant effect. In contrast to the supernatant from flagellated wild-type (WT) E. coli, the supernatant of a flagellin-deficient E. coli strain (DeltaFliC) did not induce S100A7c expression. Small interfering RNA-mediated knockdown of TLR5 expression suppressed the ability of KCs to up-regulate S100A7c expression in response to both flagellin and WT E. coli supernatant. Taken together, our data demonstrate that bacterial flagellin is essential and sufficient for the induction of S100A7c expression in KCs by E. coli.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
1530-6860
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
22
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2168-76
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Flagellin is the principal inducer of the antimicrobial peptide S100A7c (psoriasin) in human epidermal keratinocytes exposed to Escherichia coli.
pubmed:affiliation
Department of Dermatology, Medical University of Vienna, Waehringer Guertal 18-20, 1090 Vienna, Austria.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't