Modulation of individual components of gastric motor response to duodenal glucose

Adam M. Deane, Laura K. Besanko, Carly M. Burgstad, Marianne J. Chapman, Michael Horowitz, Robert J L Fraser

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)

Abstract

Aim: To evaluate individual components of the antropyloro-duodenal (APD) motor response to graded small intestinal glucose infusions in healthy humans. Methods: APD manometry was performed in 15 healthy subjects (12 male; 40 ± 5 years, body mass index 26.5 ± 1.6 kg/m2) during four 20-min intraduodenal infusions of glucose at 0, 0.5, 1.0 and 1.5 kcal/min, in a randomised double-blinded fashion. Glucose solutions were infused at a rate of 1 mL/min and separated by 40-min "wash-out" period. Data are mean ± SE. Inferential analyses are repeated measure analysis of variance with Bonferroni post-hoc testing. Results: At 0 kcal/min frequency of pressure waves were: antrum (7.5 ± 1.8 waves/20 min) and isolated pyloric pressure waves (IPPWs) (8.0 ± 2.3 waves/20 min) with pyloric tone (0.0 ± 0.9 mmHg). Intraduodenal glucose infusion acutely increased IPPW frequency (P < 0.001) and pyloric tone (P = 0.015), and decreased antral wave frequency (P = 0.007) in a dosedependent fashion. A threshold for stimulation was observed at 1.0 kcal/min for pyloric phasic pressure waves (P = 0.002) and 1.5 kcal/min for pyloric tone and antral contractility. Conclusion: There is hierarchy for the activation of gastrointestinal motor responses to duodenal glucose infusion. An increase in IPPWs is the first response observed.

Original languageEnglish
Pages (from-to)5863-5869
Number of pages7
JournalWorld Journal of Gastroenterology
Volume19
Issue number35
DOIs
Publication statusPublished - 21 Sep 2013
Externally publishedYes

Keywords

  • Antral
  • Blood glucose
  • Duodenum
  • Gastrointestinal motility
  • Glucose
  • Manometry
  • Motor activity
  • Pyloric

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