Neural mechanisms involved in the inhibition of intestinal motility induced by intestinal electrical stimulation in conscious dogs

S. Liu, J. Liu, J. D.Z. Chen

Research output: Contribution to journalArticlepeer-review

Abstract

The effects and mechanisms of intestinal electrical stimulation (IES) with long pulses on intestinal motility were investigated in conscious dogs. Eighteen dogs were equipped with serosal electrodes and an intestinal cannula in the small bowel. The first experiment was designed to study the effect of one-channel IES on intestinal motility and the extent of this effect. The second experiment was conducted to study the effect of IES on intestinal motility and the involvement of neural pathway. The IES with long pulses significantly inhibited intestinal motility. Intestinal motility of the entire measured segment (40-220 cm distal to the stimulation electrodes) was inhibited by 60-74% with the single-channel IES with long pulses. Hexamethonium, guanethidine, phentolamine, propranolol partially, but not Nω-nitro-l- arginine (l-NNA), ondansetron and naloxone prevented the inhibitory effect of IES on intestinal motility. We conclude that single-channel IES inhibits intestinal motility within a distance of at least 2 m. This inhibitory effect induced by IES with long pulses is mediated via sympathetic but not nitrergic, serotoninergic 5-HT3 and opiate pathway.

Original languageEnglish (US)
Pages (from-to)62-68
Number of pages7
JournalNeurogastroenterology and Motility
Volume18
Issue number1
DOIs
StatePublished - Jan 2006

Keywords

  • Gastrointestinal motility
  • Intestinal pacing
  • Nitric oxide
  • Obesity
  • Sympathetic nerves

ASJC Scopus subject areas

  • Physiology
  • Endocrine and Autonomic Systems
  • Gastroenterology

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