Cited by 6,638Adipokines, Inflammation, and Metabolic DiseasesGut microbiota and healthDiet, Metabolism, and Disease

Metabolic Endotoxemia Initiates Obesity and Insulin Resistance

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Cani, Patrice D., Amar, Jacques, Iglesias, Miguel Angel, Poggi, Marjorie, Knauf, Claude, Bastelica, Delphine, Neyrinck, Audrey M., Fava, Francesca +14 more·2007·Diabetes

Abstract

Diabetes and obesity are two metabolic diseases characterized by insulin resistance and a low-grade inflammation. Seeking an inflammatory factor causative of the onset of insulin resistance, obesity, and diabetes, we have identified bacterial lipopolysaccharide (LPS) as a triggering factor. We found that normal endotoxemia increased or decreased during the fed or fasted state, respectively, on a nutritional basis and that a 4-week high-fat diet chronically increased plasma LPS concentration two to three times, a threshold that we have defined as metabolic endotoxemia. Importantly, a high-fat diet increased the proportion of an LPS-containing microbiota in the gut. When metabolic endotoxemia was induced for 4 weeks in mice through continuous subcutaneous infusion of LPS, fasted glycemia and insulinemia and whole-body, liver, and adipose tissue weight gain were increased to a similar extent as in high-fat–fed mice. In addition, adipose tissue F4/80-positive cells and markers of inflammation, and liver triglyceride content, were increased. Furthermore, liver, but not whole-body, insulin resistance was detected in LPS-infused mice. CD14 mutant mice resisted most of the LPS and high-fat diet–induced features of metabolic diseases. This new finding demonstrates that metabolic endotoxemia dysregulates the inflammatory tone and triggers body weight gain and diabetes. We conclude that the LPS/CD14 system sets the tone of insulin sensitivity and the onset of diabetes and obesity. Lowering plasma LPS concentration could be a potent strategy for the control of metabolic diseases.

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Crossref · 10.2337/db06-1491

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Authors
Cani, P. D., Amar, J., Iglesias, M. A., Poggi, M., Knauf, C., Bastelica, D., Neyrinck, A. M., Fava, F., Tuohy, K. M., Chabo, C., Waget, A., Delmée, E., Cousin, B., Sulpice, T., Chamontin, B., Ferrières, J., Tanti, J.-F., Gibson, G. R., Casteilla, L., Delzenne, N. M., Alessi, M. C., & Burcelin, R.
Affiliations
  • UCLouvain (BE)
  • Inserm (FR)
  • Institute of Molecular Medicine, I2MR Toulouse, France
  • University of Reading (GB)
  • Unité Pharmacokinetics, Metabolism, Nutrition, and Toxicology-73/69, Université catholique de Louvain, Brussels, Belgium
  • Unité Mixte de Recherche 5241, Centre National de la Recherche Scientifique, Université Paul Sabatier, Toulouse, France
  • Physiogenex (France) (FR)
  • Institut National de la Santé et de la Recherche Médicale (INSERM) 558, Toulouse, France
  • INSERM U 568, Nice, France
  • Centre National de la Recherche Scientifique (FR)
Venue
Diabetes
Published
2007-07-01
Volume
56
Issue
7
Pages
1761-1772
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2131536322
Cited by
6,638
References
47
Citations by year
2026: 491 · 2025: 407 · 2024: 456 · 2023: 449 · 2022: 536 · 2021: 537 · 2020: 575 · 2019: 456 · 2018: 396 · 2017: 391 · 2016: 380 · 2015: 351 · 2014: 282 · 2013: 269 · 2012: 197
FWCI
71.14
Type
journal article
Language
en
Open access
Licence
other-oa
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
  • eCite Digital Repository (University of Tasmania) (submittedVersion)
  • Digital Access to Libraries (submittedVersion, other-oa)
  • Figshare (submittedVersion, cc-by)
Topics
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diet, Metabolism, and Disease
Keywords
metabolic endotoxemia, lipopolysaccharide, CD14, insulin resistance, obesity, type 2 diabetes, gut microbiota, high-fat diet, fasting, adipose tissue inflammation, hepatic triglycerides, low-grade inflammation
MeSH terms
Animals, Dietary Fats, Insulin Resistance, Lipopolysaccharides, Male, Obesity, Lipopolysaccharide Receptors, Endotoxemia, Mice

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