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Related Experiment Videos

Is obesity an inflammatory disease?

Eduardo J B Ramos1, Yuan Xu, Irina Romanova

  • 1Department of Surgery, Management Information and Decision, Clinical Molecular Medicine, SUNY Upstate Medical University, Syracuse University, Syracuse, NY, USA.

Surgery
|August 30, 2003
PubMed
Summary

Roux-en-Y gastric bypass (RYGB) effectively reduces inflammation markers in obese rats, indicating obesity is an inflammatory condition. This surgery also led to significant weight loss and decreased inflammatory markers in fat tissues.

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Area of Science:

  • Metabolic Surgery
  • Inflammation Research
  • Obesity Studies

Background:

  • Obesity is linked to elevated inflammation markers like IL-6 and TNF-alpha.
  • These inflammatory markers are associated with conditions such as diabetes, hypertension, and stroke.
  • Obesity is characterized as a low-grade inflammatory disease.

Purpose of the Study:

  • To investigate the impact of Roux-en-Y gastric bypass (RYGB) on inflammation markers.
  • To assess changes in gene expression in key metabolic and fat tissues post-RYGB.
  • To confirm obesity as an inflammatory condition.

Main Methods:

  • Obesity was induced in Sprague Dawley rats using a high-energy diet (HED).
  • Three groups were studied: RYGB, sham-operated pair-fed, and sham-operated ad libitum HED, alongside a chow-fed control group.

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  • Post-operation, body weight, fat tissue mass, and levels of IL-6, TNF-alpha, and corticosterone were measured. Gene expression profiling was performed on the arcuate nucleus and subcutaneous abdominal fat (SAF).

    • Main Results:

    • RYGB surgery resulted in significant weight loss compared to sham-operated groups.
    • A decrease in mesenteric and subcutaneous abdominal fat weight was observed post-RYGB.
    • Inflammation markers (IL-6, TNF-alpha, corticosterone) and associated gene expression in fat tissues were reduced after RYGB.

    Conclusions:

    • Roux-en-Y gastric bypass surgery effectively reduces biochemical markers of inflammation.
    • The findings support the classification of obesity as an inflammatory condition.
    • RYGB may mitigate obesity-related inflammation and associated health risks.