Assessment Of Intestinal Permeability In Rats By Permeation Of Inulin-Fluorescein

M. Krimsky, A. Dagan, S. Yedgar*, L. Aptekar, M. Ligumsky

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The measurement of intestinal permeability is widely used to assess different aspects of mucosal barrier disorders and related disease states, and has been proposed for evaluation of disease activity. To provide a simple method for assessment of intestinal permeability, we examined the permeation of inulin-fluorescein (InFI) in rat models of small intestinal injury and colitis. Small intestinal or colonic inflammation was induced by either i.p. administration of indomethacin or rectal administration of trinitrobenzene sulfonic acid (TNBS), respectively. For monitoring of intestinal permeability, InFl was administered orally or rectally to rats with small intestinal or colonic inflammation, respectively, and its level in blood was determined by the fluorescence intensity in the plasma. In small intestinal injury, InFl reached its peak in plasma 3 h after oral administration, while in colitis the InFl peak was reached 1 h after rectal administration. The highest permeability was observed at 72 h or 12 h after induction of small intestinal or colonic inflammation, respectively. In small intestinal injury the InFl permeation, as measured by its plasma level prior to sacrifice, was in agreement with intestinal damage evaluated after sacrifice. In colitis, the permeability at 12 h after induction of the disease correlated well with mortality. These findings demonstrate that InFl can be used as a novel, safe and easy-to-use probe for the evaluation of gut permeation and follow-up of gastrointestinal injury.

Original languageEnglish
Pages (from-to)143-154
Number of pages12
JournalJournal of Basic and Clinical Physiology and Pharmacology
Volume11
Issue number2
DOIs
StatePublished - 2000

Keywords

  • colitis
  • indomethacin
  • inflammatory bowel disease
  • small intestine injury
  • trinitrobenzene sulfonic acid

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