Needleless transcutaneous electroacupuncture improves rectal distension-induced impairment in intestinal motility and slow waves via vagal mechanisms in dogs

Research output: Contribution to journalArticle

Abstract

Aim: This study was designed to compare the effects and mechanisms of transcutaneous electroacupuncture (TEA) on rectal distention (RD)-induced intestinal dysmotility with EA. Methods: six female dogs chronically implanted with a duodenal fistula, a proximal colon fistula and intestinal serosal electrodes were studied. EA and TEA were performed via needles and cutaneous electrodes placed at bilateral ST-36 (Zusanli) acupoints respectively; their effects on postprandial intestinal dysmotility (slow waves, contractions and transit) induced by RD, and autonomic functions were compared. Results: RD at a volume of 140 ml suppressed intestinal contractions; the motility index was reduced with RD (P = 0.001). Both EA and TEA ameliorated the suppressed contractions (P = 0.003 and 0.001) and their effects were comparable. RD reduced the percentage of normal intestinal slow waves (P = 0.002) that was increased with both EA and TEA (P = 0.005 and 0.035). No significant difference was noted between EA and TEA. EA and TEA reduced small bowel transit time (P = 0.001 and 0.007); these prokinetic effects were blocked by atropine. Both EA and TEA increased vagal activity assessed by the spectral analysis of heart rate variability (both P = 0.03). Conclusion: RD inhibits postprandial intestinal motility. Both EA and TEA at ST-36 are able to improve the RD-induced impairment in intestinal contractions, transit and slow waves mediated via the vagal mechanism. Needleless TEA is as effective as EA in ameliorating the intestinal hypomotility.

Original languageEnglish (US)
Pages (from-to)4635-4646
Number of pages12
JournalInternational Journal of Clinical and Experimental Medicine
Volume8
Issue number3
StatePublished - Jan 1 2015
Externally publishedYes

Keywords

  • Heart rate variability
  • Intestinal motility
  • Intestinal slow waves
  • Rectal distension
  • Transcutaneous electroacupuncture

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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