کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6103782 1211132 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Research ArticleImpaired liver regeneration in Ldlr−/− mice is associated with an altered hepatic profile of cytokines, growth factors, and lipids
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی بیماری‌های گوارشی
پیش نمایش صفحه اول مقاله
Research ArticleImpaired liver regeneration in Ldlr−/− mice is associated with an altered hepatic profile of cytokines, growth factors, and lipids
چکیده انگلیسی

Background & AimsIt is widely recognized that in the early stages of liver regeneration after partial hepatectomy, the hepatocytes accumulate a significant amount of lipids. The functional meaning of this transient steatosis and its effect on hepatocellular proliferation are not well defined. In addition, the basic mechanisms of this lipid accumulation are not well understood although some studies suggest the participation of the Low Density Lipoprotein Receptor (Ldlr).MethodsTo address these questions, we studied the process of liver regeneration in Ldlr null mice and wild type mice following partial hepatectomy.ResultsLdlr deficiency was associated with a significant decrease in serum albumin concentration, during early stages of liver regeneration, and a delayed hepatic regeneration. Remnant livers of Ldlr−/− showed a time-shifted expression of interleukin-6 (IL6) and a defective activation of tumor necrosis factor-α (TNFα) and hepatocyte growth factor (HGF) expression in early phases of liver regeneration. Unexpectedly, Ldlr−/− showed no significant differences in the content of lipid droplets after partial hepatectomy compared to wild type mice. However, lipidomic analysis of the regenerating liver from Ldlr−/− revealed a lipid profile compatible with liver quiescence: high content of cholesterol esters and ceramide, and low levels of phosphatidylcholine.ConclusionsLdlr deficiency is associated with significant changes in the hepatic lipidome that affect cytokine-growth factor signaling and impair liver regeneration. These results suggest that the analysis of the hepatic lipidome may help predict the success of liver regeneration in the clinical environment, specifically in the context of pre-existing liver steatosis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hepatology - Volume 59, Issue 4, October 2013, Pages 731-737
نویسندگان
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