Dietary cholesterol promotes adipocyte hypertrophy and adipose tissue inflammation in visceral, but not in subcutaneous, fat in monkeys

Soonkyu Chung, Helen Cuffe, Stephanie M. Marshall, Allison L. McDaniel, Jung Heun Ha, Kylie Kavanagh, Cynthia Hong, Peter Tontonoz, Ryan E. Temel, John S. Parks

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

OBJECTIVE - Excessive caloric intake is associated with obesity and adipose tissue dysfunction. However, the role of dietary cholesterol in this process is unknown. The aim of this study was to determine whether increasing dietary cholesterol intake alters adipose tissue cholesterol content, adipocyte size, and endocrine function in nonhuman primates. APPROACH AND RESULTS - Age-matched, male African Green monkeys (n=5 per group) were assigned to 1 of 3 diets containing 0.002 (low [Lo]), 0.2 (medium [Med]), or 0.4 (high [Hi]) mg cholesterol/kcal. After 10 weeks of diet feeding, animals were euthanized for adipose tissue, liver, and plasma collection. With increasing dietary cholesterol, free cholesterol (FC) content and adipocyte size increased in a stepwise manner in visceral, but not in subcutaneous fat, with a significant association between visceral adipocyte size and FC content (r=0.298; n=15; P=0.035). In visceral fat, dietary cholesterol intake was associated with (1) increased proinflammatory gene expression and macrophage recruitment, (2) decreased expression of genes involved in cholesterol biosynthesis and lipoprotein uptake, and (3) increased expression of proteins involved in FC efflux. CONCLUSIONS - Increasing dietary cholesterol selectively increases visceral fat adipocyte size, FC and macrophage content, and proinflammatory gene expression in nonhuman primates. Visceral fat cells seem to compensate for increased dietary cholesterol by limiting cholesterol uptake/synthesis and increasing FC efflux pathways.

Original languageEnglish (US)
Pages (from-to)1880-1887
Number of pages8
JournalArteriosclerosis, Thrombosis, and Vascular Biology
Volume34
Issue number9
DOIs
StatePublished - Sep 2014

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Keywords

  • Cercopithecus aethiops
  • adipose tissue
  • cholesterol
  • dietary
  • inflammation
  • white

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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