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Functional Assessment of Intestinal Motility and Gut Wall Inflammation in Rodents: Analyses in a Standardized Model of Intestinal Manipulation
09:44

Functional Assessment of Intestinal Motility and Gut Wall Inflammation in Rodents: Analyses in a Standardized Model of Intestinal Manipulation

Published on: September 11, 2012

Selective jejunal manipulation causes postoperative pan-enteric inflammation and dysmotility

Nicolas T Schwarz1, Jörg C Kalff, Andreas Türler

  • 1Chirurgische Universitätsklinik der Friedrich-Wilhelms-Universität, Bonn, Germany.

Gastroenterology
|December 31, 2003
PubMed
Abstract

Insights

Selective small bowel manipulation triggers widespread inflammation and motility issues throughout the entire gastrointestinal tract. This "field effect" impacts the stomach and colon, not just the manipulated jejunum.

Area of Science:

  • Gastroenterology
  • Inflammation Research
  • Surgical Physiology

Background:

  • Small bowel manipulation causes inflammation and ileus in the jejunal muscularis.
  • The study aimed to understand if jejunal manipulation affects unmanipulated stomach and colon.

Purpose of the Study:

  • To investigate pan-enteric inflammatory and motility changes in the muscularis of the stomach and colon due to selective jejunal manipulation.
  • To assess the molecular and functional consequences across the entire gastrointestinal tract.

Main Methods:

  • Rat jejunum was manipulated, with data collected 0-24 hours post-manipulation.
  • Measured in vivo gastric emptying, GI transit, and in vitro colonic muscle contractility.
  • Utilized RT-PCR, EMSA, and histochemical staining for molecular and cellular analysis.

Main Results:

  • Jejunal manipulation suppressed contractions, gastric emptying, and colonic motility, effects mitigated by dexamethasone.
  • Significant upregulation of IL-6 mRNA and STAT protein activation observed in jejunal, gastric, and colonic muscularis.
  • Increased expression of TNF-alpha, COX-2, and iNOS, with neutrophil recruitment across all GI regions.

Conclusions:

  • Selective small bowel manipulation induces a pan-enteric "field effect" phenomenon.
  • This effect involves molecular, cellular, and functional alterations in unmanipulated gastric and colonic muscularis.
  • Highlights the interconnectedness of the gastrointestinal tract in response to localized injury.

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