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Human endothelial cells produce IL-6. Lack of responses to exogenous IL-6

Academic Article
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Overview

authors

  • Podor, T. J.
  • Jirik, F. R.
  • Loskutoff, David J.
  • Carson, D. A.
  • Lotz, Martin

publication date

  • June 1989

journal

  • Annals of the New York Academy of Sciences  Journal

abstract

  • The interaction between human endothelial cells and leukocytes during immunological and inflammatory responses is in part mediated through the release of soluble mediators. We report that cultured human umbilical vein endothelial cells secrete IL-6 when stimulated with lipopolysaccharide. The monokines, IL-1 and TNF-alpha, were potent inducers of IL-6, whereas lymphotoxin was only effective at much higher concentrations. IFN gamma also was a strong stimulus of IL-6 production, but TGF-beta did not have an effect at doses modulating other endothelial cell functions. Endothelial cell IL-6 was active as hybridoma-plasmacytoma growth factor and as B-cell and hepatocyte stimulating factor. Endothelial IL-6 activity was neutralized by a specific antibody to IL-6 and it was shown by immunoprecipitation to be identical in size to human fibroblast-derived IL-6. IL-6 did not have a detectable effect on several endothelial cell functions, including proliferation, adherence of leukocytes, and synthesis of PGE2, TPA, and PAI-1. As IL-6 is probably an important regulator of host defense responses, production of this cytokine by endothelial cells may contribute to the pathogenesis of various inflammatory and immunologic diseases.

subject areas

  • Animals
  • Biological Factors
  • Cell Division
  • Cell Line
  • Cells, Cultured
  • Cytokines
  • DNA Replication
  • Endothelium, Vascular
  • Female
  • Humans
  • Interleukin-6
  • Interleukins
  • Macrophages
  • Mice
  • Plasmacytoma
  • Umbilical Veins
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Identity

International Standard Serial Number (ISSN)

  • 0077-8923

Digital Object Identifier (DOI)

  • 10.1111/j.1749-6632.1989.tb24030.x

PubMed ID

  • 2660697
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Additional Document Info

start page

  • 374

end page

  • 387

volume

  • 557

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