Adiponectin Deficiency Exacerbates Lipopolysaccharide/D-Galactosamine-Induced Liver Injury In Mice
World journal of gastroenterology(2006)
Abstract
AIM: To examine the effects of adiponectin on the functions of Kupffer cells, key modulators of lipopolysaccharide (LPS)-induced liver injury.METHODS: D-galactosamine (GalN) and LPS were injected intraperitoneally into adiponectin-/- mice and wild type mice. Kupffer cells, isolated from Sprague-Dawley rats, were preincubated with or without adiponectin, and then treated with LPS.RESULTS: In knockout mice, GalN/LPS injection significantly lowered the survival rate, significantly raised the plasma levels of alanine transaminase and tumor necrosis factor-alpha (TNF-alpha) and significantly reduced IL-10 levels compared with wild type mice. TNF-alpha gene expression in the liver was which higher and those of IL-10 were lower in knockout mice than in wild type mice. In cultured adiponectin-pre-treated Kupffer cells, LPS significantly lowered TNF-alpha levels and raised IL-10,levels in the culture media and their respective gene expression levels, compared with Kupffer cells without adiponectin-pre-treatment.CONCLUSION: Adiponectin supresses TNF-alpha production and induces IL-10 production by Kupffer cells in response to LPS stimulation, and a lack of adiponectin enhances I LPS-induced liver injury. (C) 2006 The WJG Press. All rights reserved.
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Key words
adiponectin,lipopolysaccharide,Kupffer cell,TNF-alpha,IL10
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