Modulatory effect of intestinal polyamines and trace amines on the spontaneous phasic contractions of the isolated ileum and colon rings of mice

  • Manuel Sánchez
  • Lorena Suárez
  • María Teresa Andrés
  • Blanca Henar Flórez
  • Javier Bordallo
  • Sabino Riestra
  • Begoña Cantabrana
Keywords: Food composition, polyamines, trace amines, intestinal motility

Abstract

Background : Gastrointestinal motility modulatory factors include substances of the intestinal content, such as polyamines and trace amines (TAs), the focus of this study.

Methods : The amines of food, intestinal content and from faecal bacteria of Swiss mice were determined by HPLC and functionally characterised in isolated distal ileum and medial colon rings.

Results : Mouse food and intestinal content contain polyamines (spermidine>putrescine>spermine) and TAs (isoamylamine>cadaverine). Intestinal bacteria mainly produce putrescine and cadaverine. The amines inhibited the spontaneous motility of the ileum (0.1-3 mM) and colon rings (0.01-3 mM, with lower IC 50 ), with: spermine~isoamylamine~spermidine. Spermine inhibition was tetrodotoxin (TTX)-insensitive, while isoamylamine was TTX-sensitive, suggesting neural control. Mainly in the ileum, isoamylamine (3 mM) elicited acute effects modified by TTX, atropine and propranolol, and suppressed by spermine (3 mM), not being localized at the smooth muscle level. The amines assayed (3 mM), except putrescine and cadaverine in the ileum and isoamylamine in the colon, antagonised acetylcholine (ACh, 0.1 mM)-elicited phasic contractions. Isoamylamine and spermine in colon relaxed KCl (100 mM)-elicited tonic contractions, suggesting an effect on smooth muscle, but did not justify the suppression of motility caused by spermine and isoamylamine.

Conclusions : Polyamines and TAs of the intestinal content might act on chemosensors and modulate intestinal peristalsis.

Downloads

Download data is not yet available.
Published
2017-05-26
How to Cite
1.
Sánchez M, Suárez L, Andrés MT, Flórez B, Bordallo J, Riestra S, Cantabrana B. Modulatory effect of intestinal polyamines and trace amines on the spontaneous phasic contractions of the isolated ileum and colon rings of mice. Food & Nutrition Research [Internet]. 26May2017 [cited 19Jul.2018];61. Available from: https://foodandnutritionresearch.net/index.php/fnr/article/view/1185
Section
Original Articles