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Related Experiment Videos

Nerve terminals containing neuropeptides decrease in number after massive proximal small bowel resection in the

P Vento1, T Kiviluoto, M Pakarinen

  • 1II Department of Surgery, Helsinki University Central Hospital, Finland.

Digestive Diseases and Sciences
|May 20, 1998
PubMed
Summary

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Massive small intestine resection in piglets significantly altered neuropeptide-containing nerve fibers, particularly vasoactive intestinal peptide (VIP) and galanin, impacting remaining ileum function.

Area of Science:

  • Gastroenterology
  • Neuroscience
  • Surgical Research

Background:

  • Small intestine resection can lead to functional changes in the remaining bowel.
  • Neuropeptides play a crucial role in regulating gastrointestinal motility and absorption.

Purpose of the Study:

  • To investigate the impact of 75% proximal small intestine resection on neuropeptide innervation in the porcine ileum.
  • To assess changes in vasoactive intestinal peptide (VIP), galanin, enkephalin, substance P, and somatostatin nerve fibers.

Main Methods:

  • Porcine model with 75% proximal small intestine resection.
  • Immunofluorescence microscopy and quantitative scoring of neuropeptide-containing nerve fibers.
  • Computer-assisted morphometry for VIP, galanin, and enkephalin fibers in the circular muscle layer and villi.

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Main Results:

  • Marked decrease in VIP-immunoreactive fibers in the mucosa and circular muscle layer post-resection.
  • Significant decrease in galanin immunoreactivity in the circular muscle layer.
  • Resection inhibited the normal age-related increase in enkephalin-immunoreactive nerve fibers.

Conclusions:

  • Massive small intestine resection causes significant alterations in neuropeptide innervation of the remaining ileum.
  • These neurochemical changes suggest potential modifications in motor activity and mucosal function.