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Related Experiment Video

Updated: Dec 24, 2025

Murine Fecal Isolation and Microbiota Transplantation
07:32

Murine Fecal Isolation and Microbiota Transplantation

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Intestinal microbiota and obesity.

Michael Blaut1, Susanne Klaus

  • 1Department of Gastrointestinal Microbiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Arthur-Scheunert-Allee 114-116, 14558, Nuthetal, Germany. blaut@dife.de

Handbook of Experimental Pharmacology
|January 18, 2012
PubMed
Summary

The gut microbiome influences obesity and metabolic syndrome. Transplanting gut microbes from obese to lean mice transferred metabolic issues, suggesting a causal role for gut bacteria in obesity.

Area of Science:

  • Microbiology
  • Metabolic Science
  • Gut Microbiome Research

Background:

  • The human gut microbiome is diverse and varies significantly between individuals.
  • The gut microbiota is increasingly implicated in the development of obesity and metabolic syndrome.
  • Gut microbiota transplantation studies in rodents show a causal link to metabolic syndrome features.

Purpose of the Study:

  • To explore the role of the gut microbiota in the development of obesity and metabolic syndrome.
  • To investigate the mechanisms by which gut microbiota may influence host metabolism.

Main Methods:

  • Gut microbiota transplantation from obese to nonobese, germ-free mice.
  • Analysis of metabolic syndrome-associated features in recipient mice.
  • Review of proposed mechanisms including energy provision, gut-hormone regulation, and intestinal permeability.

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Last Updated: Dec 24, 2025

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Main Results:

  • Transplantation of gut microbiota from obese donors to nonobese recipients resulted in the transfer of metabolic syndrome-associated features.
  • Proposed mechanisms involve increased energy harvest from dietary fiber, altered gut-hormone production, and elevated lipopolysaccharides (LPS) due to increased intestinal permeability.
  • Metabolic endotoxemia and endocannabinoid system activation are discussed as contributing factors.

Conclusions:

  • There is substantial evidence supporting the role of gut microbiota in obesity development in rodent models.
  • The precise contribution of the gut microbiome to human obesity remains to be fully elucidated.