Norepinephrine induces MAIL mRNA expression in primary cultured hepatocytes through IL-1β released from non-parenchymal cells

  • Kim, Hyeon-Cheol (College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University) ;
  • Jung, Bae Dong (College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University)
  • Accepted : 2010.03.25
  • Published : 2010.06.30

Abstract

The molecule possessing ankyrin-repeats induced by lipopolysaccharide (MAIL) protein is a novel member of the $Ikappa{\beta}$ family. In the present study, we examined the effect of norepinephrine (NE) on MAIL mRNA expression in primary cultured mouse hepatocytes and non-parenchymal liver cells. MAIL mRNA expression in hepatocytes and non-parenchymal liver cells was not directly influenced by NE. However, MAIL mRNA expression in hepatocytes was significantly induced by incubation with a culture medium of non-parenchymal liver cells, treated with NE. Pretreatment with an interleukin (IL)-1 receptor antagonist significantly attenuated the stimulatory effect of the medium. Moreover, exogenous $IL-1{\beta}$ induced MAIL mRNA expression in hepatocytes, while IL-6 and tumor necrosis factor $\alpha$ did not. The concentration of $IL-1{\beta}$ in the medium of non-parenchymal liver cells was significantly increased after NE-treatment. These results suggest that NE can induce MAIL mRNA expression in hepatocytes through $IL-1{\beta}$, released from non-parenchymal liver cells.

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