Postprandial activation of leukocyte-endothelium interaction by fatty acids in the visceral adipose tissue microcirculation

FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology
Kyle J PrestonRosario Scalia

Abstract

High-fat diet (HFD)-induced obesity is associated with accumulation of inflammatory cells predominantly in visceral adipose depots [visceral adipose tissue (VAT)] rather than in subcutaneous ones [subcutaneous adipose tissue (SAT)]. The cellular and molecular mechanisms responsible for this phenotypic difference remain poorly understood. Controversy also exists on the overall impact that adipose tissue inflammation has on metabolic health in diet-induced obesity. The endothelium of the microcirculation regulates both the transport of lipids and the trafficking of leukocytes into organ tissue. We hypothesized that the VAT and SAT microcirculations respond differently to postprandial processing of dietary fat. We also tested whether inhibition of endothelial postprandial responses to high-fat meals (HFMs) preserves metabolic health in chronic obesity. We demonstrate that administration of a single HFM or ad libitum access to a HFD for 24 h quickly induces a transient P-selectin-dependent inflammatory phenotype in the VAT but not the SAT microcirculation of lean wild-type mice. Studies in P-selectin-deficient mice confirmed a mechanistic role for P-selectin in the initiation of leukocyte trafficking, myeloperoxidase accumulation, ...Continue Reading

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Citations

May 28, 2020·Arteriosclerosis, Thrombosis, and Vascular Biology·Ying ShaoXiaofeng Yang
Jan 1, 2021·Arteriosclerosis, Thrombosis, and Vascular Biology·Charles DrummerXiaofeng Yang
Apr 6, 2021·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·Xueying ChenYanbing Li

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