Linked Life Data

10087182

Source:http://linkedlifedata.com/resource/pubmed/id/10087182

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pubmed-article:10087182pubmed:abstractTextHuman vascular endothelial cells can be induced by IFN-gamma to express class II MHC proteins. Previously, dextran sulfate was shown to selectively inhibit expression of class II MHC by preventing transcription of the gene encoding CIITA, a transactivator protein required for IFN-gamma-inducible expression of class II genes. In this study we characterized the effects of dextran sulfate on the intracellular events occurring prior to CIITA activation. Immunoprecipitation and Western blot analyses indicated that IFN-gamma-induced phosphorylation of Stat1 and Jak2 was blocked by dextran sulfate. In addition, electron micrographs showing the large accumulation of dextran sulfate particles in the cytoplasms of endothelial cells demonstrated that Stat and Jak proteins may directly interact with dextran sulfate. Binding of radiolabeled IFN-gamma to cells indicated that dextran sulfate may also modulate IFN-gamma interactions with the cell surface. Thus, dextran sulfate is capable of interfering with the IFN-gamma-induced expression of class II MHC genes at multiple sites.lld:pubmed
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pubmed-article:10087182pubmed:authorpubmed-author:HuntL ALAlld:pubmed
pubmed-article:10087182pubmed:authorpubmed-author:WilsonM AMAlld:pubmed
pubmed-article:10087182pubmed:authorpubmed-author:JustusD EDElld:pubmed
pubmed-article:10087182pubmed:authorpubmed-author:KotwalG JGJlld:pubmed
pubmed-article:10087182pubmed:authorpubmed-author:LevyD HDHlld:pubmed
pubmed-article:10087182pubmed:copyrightInfoCopyright 1999 Academic Press.lld:pubmed
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pubmed-article:10087182pubmed:day15lld:pubmed
pubmed-article:10087182pubmed:volume192lld:pubmed
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pubmed-article:10087182pubmed:pagination140-8lld:pubmed
pubmed-article:10087182pubmed:dateRevised2009-11-19lld:pubmed
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pubmed-article:10087182pubmed:articleTitleDextran sulfate inhibits IFN-gamma-induced Jak-Stat pathway in human vascular endothelial cells.lld:pubmed
pubmed-article:10087182pubmed:affiliationDepartment of Microbiology and Immunology, University of Louisville School of Medicine, Louisville, Kentucky 40292, USA.lld:pubmed
pubmed-article:10087182pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:10087182pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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