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Updated: Jan 30, 2026

A Murine Model of Vertical Sleeve Gastrectomy
06:47

A Murine Model of Vertical Sleeve Gastrectomy

Published on: December 18, 2017

11.7K

Oea Signaling Pathways and the Metabolic Benefits of Vertical Sleeve Gastrectomy

Chelsea R Hutch1, Danielle R Trakimas2, Karen Roelofs1

  • 1University of Michigan, Ann Arbor, MI.

Annals of Surgery
|February 1, 2019
PubMed
Abstract

Insights

Vertical sleeve gastrectomy (VSG) improves weight loss and metabolism independently of N-oleoylethanolamide (OEA) signaling targets like PPARα, GPR119, and CD36. VSG

Area of Science:

  • Bariatric Surgery
  • Metabolic Disease Research
  • Obesity Pathophysiology

Background:

  • N-oleoylethanolamide (OEA) is an anorectic compound influencing lipid metabolism and energy expenditure.
  • OEA activates signaling targets including peroxisome proliferator-activated-receptor alpha (PPARα), GPR119, and CD36.
  • Obesity and related diseases represent a significant global health challenge.

Purpose of the Study:

  • To investigate if key signaling targets of N-oleoylethanolamide (OEA) are essential for weight loss and metabolic improvements after vertical sleeve gastrectomy (VSG).
  • To determine the role of PPARα, GPR119, and CD36 in mediating the effects of VSG on body weight, composition, and diet preference.

Main Methods:

  • Diet-induced obese mice with genetic knockouts (KO) for PPARα, GPR119, and CD36 underwent either VSG or sham surgery.
  • Evaluated body weight, body composition, diet preference, and metabolic parameters (glucose tolerance, lipid profiles).
  • Assessed duodenal OEA production and target gene expression post-surgery.

Main Results:

  • VSG enhanced weight loss and glucose tolerance in wild-type and all knockout mouse models (PPARαKO, GPR119KO, CD36KO).
  • VSG corrected hepatic triglyceride dysregulation in CD36KO mice and improved lipid profiles in PPARαKO mice.
  • PPARα signaling influenced macronutrient preference independently of VSG, while CD36 absence blunted the VSG-induced shift towards carbohydrates.

Conclusions:

  • The effectiveness of VSG in promoting weight loss and metabolic improvements does not rely on the N-oleoylethanolamide (OEA) signaling pathway.
  • While OEA is a potential therapeutic candidate for obesity, it is not the mechanism driving VSG's success.
  • Understanding these pathways can inform future obesity treatment strategies.

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