High-fat meals induce systemic cytokine release without evidence of endotoxemia-mediated cytokine production from circulating monocytes or myeloid dendritic cells

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• 作者：Christopher L. Fogarty ; Janne K. Nieminen ; Lina Per?neva…
• 关键词：Type 1 diabetes ; High ; fat diet ; Inflammation ; Lipopolysaccharide ; Endotoxin ; Cytokines
• 刊名：Acta Diabetologica
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：52
• 期：2
• 页码：315-322
• 全文大小：357 KB
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• 刊物类别：Medicine
• 刊物主题：Medicine & Public Health
  Internal Medicine
  Diabetes
  Metabolic Diseases
  
• 出版者：Springer Milan
• ISSN：1432-5233

文摘

Aims Dietary fats have been shown to promote the translocation of bacterial endotoxins from the gut into circulation, which may induce systemic inflammation and modulate the inflammatory response of circulating immune cells. The aim of this study was to determine the effect of the postprandial milieu on inflammation and the inflammatory response of antigen presenting cells in the context of type 1 diabetes (T1D). Materials and methods Eleven patients with T1D and eleven nondiabetic controls were recruited as part of the FinnDiane study and given two fatty meals during 1?day. Cytokine responses in monocytes and myeloid dendritic cells (mDCs) as well as serum lipopolysaccharide activity levels, triglyceride concentrations and cytokine concentrations were measured from fasting and postprandial blood samples. Results Postprandially, patients with T1D and controls showed significant increases in eight inflammatory cytokines (IL-6, TNF-α, IL-1β, IFN-α, IL-10, IFN-γ, IL-12 and MIP-1β) without concomitant increase in serum LPS activity. Serum cytokine production was similar in both groups. No postprandial change was seen in the IL-6, TNF-α or IL-1β production of mDCs or monocytes. At fasting, diabetic mDCs exhibited higher LPS-induced IL-6 and IL-1β production than controls. Conclusions Acute high-fat meals increase circulating cytokines but have no effect on serum lipopolysaccharide activity levels or cytokine production in circulating mDCs or monocytes. Our results suggest that postprandial increase in serum cytokine levels is neither mediated by circulating endotoxins nor the activation of circulating innate cells. The production of high-fat meal-induced inflammatory markers is most likely regulated at the tissue level.