Linked Life Data

19359602

Source:http://linkedlifedata.com/resource/pubmed/id/19359602

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
2009-5-8
pubmed:abstractText
ERG (Ets-related gene) is an ETS transcription factor that has recently been shown to regulate a number of endothelial cell (EC)-restricted genes including VE-cadherin, von Willebrand factor, endoglin, and intercellular adhesion molecule-2. Our preliminary data demonstrate that unlike other ETS factors, ERG exhibits a highly EC-restricted pattern of expression in cultured primary cells and several adult mouse tissues including the heart, lung, and brain. In response to inflammatory stimuli, such as tumor necrosis factor-alpha, we observed a marked reduction of ERG expression in ECs. To further define the role of ERG in the regulation of normal EC function, we used RNA interference to knock down ERG. Microarray analysis of RNA derived from ERG small interfering RNA- or tumor necrosis factor-alpha-treated human umbilical vein (HUV)ECs revealed significant overlap (P<0.01) in the genes that are up- or downregulated. Of particular interest to us was a significant change in expression of interleukin (IL)-8 at both protein and RNA levels. Exposure of ECs to tumor necrosis factor-alpha is known to be associated with increased neutrophil attachment. We observed that knockdown of ERG in HUVECs is similarly associated with increased neutrophil attachment compared to control small interfering RNA-treated cells. This enhanced adhesion could be blocked with IL-8 neutralizing or IL-8 receptor blocking antibodies. ERG can inhibit the activity of the IL-8 promoter in a dose dependent manner. Direct binding of ERG to the IL-8 promoter in ECs was confirmed by chromatin immunoprecipitation. In summary, our findings support a role for ERG in promoting antiinflammatory effects in ECs through repression of inflammatory genes such as IL-8.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
1524-4571
pubmed:author
pubmed:issnType
Electronic
pubmed:day
8
pubmed:volume
104
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1049-57
pubmed:meshHeading
pubmed-meshheading:19359602-Animals, pubmed-meshheading:19359602-Cell Adhesion, pubmed-meshheading:19359602-Cells, Cultured, pubmed-meshheading:19359602-Coculture Techniques, pubmed-meshheading:19359602-Disease Models, Animal, pubmed-meshheading:19359602-Down-Regulation, pubmed-meshheading:19359602-Endothelial Cells, pubmed-meshheading:19359602-Endotoxemia, pubmed-meshheading:19359602-Humans, pubmed-meshheading:19359602-Inflammation, pubmed-meshheading:19359602-Interleukin-8, pubmed-meshheading:19359602-Lipopolysaccharides, pubmed-meshheading:19359602-Male, pubmed-meshheading:19359602-Mice, pubmed-meshheading:19359602-Mice, Inbred C57BL, pubmed-meshheading:19359602-Neutrophils, pubmed-meshheading:19359602-Oncogene Proteins, pubmed-meshheading:19359602-Promoter Regions, Genetic, pubmed-meshheading:19359602-RNA, Messenger, pubmed-meshheading:19359602-RNA, Small Interfering, pubmed-meshheading:19359602-RNA Interference, pubmed-meshheading:19359602-Time Factors, pubmed-meshheading:19359602-Trans-Activators, pubmed-meshheading:19359602-Transcription, Genetic, pubmed-meshheading:19359602-Tumor Necrosis Factor-alpha
pubmed:year
2009
pubmed:articleTitle
Antiinflammatory effects of the ETS factor ERG in endothelial cells are mediated through transcriptional repression of the interleukin-8 gene.
pubmed:affiliation
Division of Cardiology, Department of Medicine, and the Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't, Research Support, N.I.H., Extramural