Cited by 611Gut microbiota and healthAdipokines, Inflammation, and Metabolic DiseasesDiet, Metabolism, and Disease

Germ-free C57BL/6J mice are resistant to high-fat-diet-induced insulin resistance and have altered cholesterol metabolism

Rabot, Sylvie, Membrez, Mathieu, Bruneau, Aurélia, Gérard, Philippe, Harach, Taoufiq, Moser, Mireille, Raymond, Frederic, Mansourian, Robert +1 more·2010·The FASEB Journal

Abstract

Recent studies showed that germ-free (GF) mice are resistant to obesity when consuming a high-fat, high-carbohydrate Western diet. However, it remains unclear what mechanisms are involved in the antiobesity phenotype and whether GF mice develop insulin resistance and dyslipidemia with high-fat (HF) feeding. In the present study, we compared the metabolic consequences of HF feeding on GF and conventional (conv) C57BL/6J mice. GF mice consumed fewer calories, excreted more fecal lipids, and weighed significantly less than conv mice. GF/HF animals also showed enhanced insulin sensitivity with improved glucose tolerance, reduced fasting and nonfasting insulinemia, and increased phospho-Akt((Ser-473)) in adipose tissue. In association with enhanced insulin sensitivity, GF/HF mice had reduced plasma TNF-α and total serum amyloid A concentrations. Reduced hypercholesterolemia, a moderate accretion of hepatic cholesterol, and an increase in fecal cholesterol excretion suggest an altered cholesterol metabolism in GF/HF mice. Pronounced nucleus SREBP2 proteins and up-regulation of cholesterol biosynthesis genes indicate that enhanced cholesterol biosynthesis contributed to the cholesterol homeostasis in GF/HF mice. Our results demonstrate that fewer calorie consumption and increased lipid excretion contributed to the obesity-resistant phenotype of GF/HF mice and reveal that insulin sensitivity and cholesterol metabolism are metabolic targets influenced by the gut microbiota.

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Crossref · 10.1096/fj.10-164921

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  • The gut microbiota affects lipid metabolism and lipid levels in blood and tissues in mice and humans.

    “The gut microbiota has been shown to affect lipid metabolism and lipid levels in blood and tissues, both in mice and humans.”

    From Dietary lipids, gut microbiota and lipid metabolism (2019) · cites this paper as [31]

  • Circulating triglycerides, HDL, and total cholesterol levels are increased by the gut microbiota in mice on a high-fat diet.

    “In contrast, circulating triglycerides, HDL, and total cholesterol levels are increased by the gut microbiota in mice on a high-fat diet [31].”

    From Dietary lipids, gut microbiota and lipid metabolism (2019) · cites this paper as [31]

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Authors
Rabot, S., Membrez, M., Bruneau, A., Gérard, P., Harach, T., Moser, M., Raymond, F., Mansourian, R., & Chou, C. J.
Affiliations
  • Microbiologie de l’alimentation au service de la santé (FR)
  • Department of Nutrition and Health,
  • Nestlé (Switzerland) (CH)
  • Department of Bioanalytical Science, Nestlé Research Center, Lausanne, Switzerland
Venue
The FASEB Journal
Publisher
Wiley
Published
2010-12
Volume
24
Issue
12
Pages
4948-4959
ISSN
  • 0892-6638 (ISSN-L)
  • 1530-6860
OpenAlex
W2088697466
Cited by
610
References
41
Citations by year
2026: 9 · 2025: 19 · 2024: 34 · 2023: 43 · 2022: 50 · 2021: 64 · 2020: 75 · 2019: 49 · 2018: 42 · 2017: 40 · 2016: 39 · 2015: 44 · 2014: 24 · 2013: 33 · 2012: 22
FWCI
10.17
Type
journal article
Language
en
Open access
closed
Locations
  • The FASEB Journal (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diet, Metabolism, and Disease
Keywords
germ-free mice, gut microbiota, high-fat diet, insulin resistance, cholesterol metabolism, hypercholesterolemia, obesity resistance, glucose tolerance, TNF-α, serum amyloid A, SREBP2, cholesterol biosynthesis, liver cholesterol, fecal cholesterol excretion, C57BL/6J mice
MeSH terms
Animals, Body Weight, Cholesterol, Dietary Fats, Germ-Free Life, Glucose Tolerance Test, Glycogen, Insulin Resistance, Lipids, Liver, Male, Mice, Inbred C57BL, Obesity, Blotting, Western, Polymerase Chain Reaction, Oligonucleotide Array Sequence Analysis, Mice

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