Jejunoileal Transplantation: Effects on Characteristics of Canine Jejunal Motor Activity in Vivo

Kevin E. Behrns, Michael G. Sarr, Russell B. Hanson, Alan R. Zinsmeister

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

This study was designed to determine if extrinsic innervation and intrinsic neural continuity with the duodenum (neuroenteric physiologic pathways disrupted during intestinal transplantation) modulate the characteristics of interdigestive motor activity in the canine small bowel. Five dogs served as neurally intact controls (group 1) and 10 dogs (group 2) underwent a model of jejunal autotransplantation involving in situ neural isolation of the jejunoileum. Fasting duodenal and jejunal motor activity was recorded on-line to a microcomputer using closely spaced duodenal and jejunal manometry catheters. Characteristics of global motor patterns, the migrating motor complex (MMC), and local motor patterns, including individual contractions and grouped clustered contractions, were determined. Neural isolation of the jejunoileum disrupted coordination of duodenal and jejunal phase III activity, increased the variability of cycling of the MMC, decreased the period of the jejunal MMC, and increased motility indices in the neurally isolated jejunum. In contrast, single pressure waves and clustered contractions in the neurally isolated jejunum were not altered significantly in incidence or direction, distance, or velocity of spread. In situ neural isolation of the jejunoileum leads to temporal dissociation of the MMC between the transplanted segment (jejunum) and the duodenum but does not appear to alter markedly the characteristics of local contractile activity as measured by individual or grouped contractions. The occurrence of interdigestive jejunal motor patterns and the local organization of individual and grouped small intestinal contractions are not controlled by extrinsic innervation or intrinsic neural continuity with the duodenum.

Original languageEnglish (US)
Pages (from-to)884-893
Number of pages10
JournalDigestive diseases and sciences
Volume41
Issue number5
DOIs
StatePublished - 1996

Keywords

  • Contractions, clustered contractions
  • In situ neural isolation of the small intestine
  • Migrating motor complex
  • Motor patterns
  • Single pressure waves
  • Small intestinal motility

ASJC Scopus subject areas

  • Physiology
  • Gastroenterology

Fingerprint Dive into the research topics of 'Jejunoileal Transplantation: Effects on Characteristics of Canine Jejunal Motor Activity in Vivo'. Together they form a unique fingerprint.

  • Cite this