Product ion of the cytokines interleukin 1 and 6 by murine brain microvessel endothelium and smooth muscle pericytes

Zsuzsanna Fabry, Karen M. Fitzsimmons, Judith A. Herlein, Thomas O. Moninger, Matthew B. Dobbs, Michael N. Hart

Research output: Contribution to journalArticle

156 Scopus citations

Abstract

Murine brain microvessel endothelial cells and smooth muscle/pericytes (SM/P) cells were cultured from newborn BALB/c (normal strain) and SJL/j (autoimmune-prone strain) mice. These cells were evaluated for their ability to produce interleukin (IL)-1 and IL-6 cytokines. The expression of mRNA for IL-1 and IL-6 was shown in highly purified BALB/c endothelial cells and SM/P cells using polymerase chain reaction with specific primers for IL-1α, IL-1β and IL-6. IL-6 but not IL-1 mRNA was detected in unstimulated SJL/j brain microvessel cells. The presence of IL-1 and IL-6 mRNA in the BALB/c brain microvessel endothelial cells and SM/P was confirmed by in situ hybridization. By D10.G4.1 assay, unstimulated BALB/c endothelial cells were shown to produce active IL-1 to a higher degree than SM/P. By B9 bioassay, a low amount of active IL-6 was detected in the supernatant of endothelial cells and SM/P. The production of IL-1 and IL-6 in the bioassay was upregulated by lipopolysaccharide (LPS) activation of the cells in a time- and dose-dependent way. IL-6 production was also shown to be upregulated by IL-1β activation of the cells. Brain microvessel endothelial cells of SJL/j origin released equivalent amounts of IL-6 compared to endothelial cells of BALB/c origin. However, the production of IL-6 was markedly higher in SM/P of SJL/j origin than in those of BALB/c origin. These observations, together with our previous data showing that brain microvessel SM/P cells produce GM-CSF, emphasize the possibility for active participation of brain microvasculature SM/P as well as endothelium in inflammatory reactions of the central nervous system.

Original languageEnglish
Pages (from-to)23-34
Number of pages12
JournalJournal of Neuroimmunology
Volume47
Issue number1
DOIs
StatePublished - Aug 1993
Externally publishedYes

Keywords

  • Brain
  • Cytokine
  • Endothelium
  • Pericyte
  • Smooth muscle

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