Related Experiment Video
Updated: Aug 1, 2026
09:04
DNBS/TNBS Colitis Models: Providing Insights Into Inflammatory Bowel Disease and Effects of Dietary Fat
Published on: February 27, 2014
Clinical models of intestinal adaptation
J D Schulzke1, H Schmitz, M Fromm
1Department of Gastroenterology, Universitätsklinikum Benjamin Franklin, Freie Universität Berlin, Germany.
Annals of the New York Academy of Sciences
|February 3, 1999
Summary
Small intestine mucosal adaptation shows three patterns: atrophy, hyperplasia, and hyperregeneration. Hyperregenerative mucosa in celiac sprue has reduced tight junctions, unlike blind loop models, suggesting cytokine involvement.
Area of Science:
- Gastroenterology
- Cell Biology
- Physiology
Background:
- Small intestine mucosal adaptation exhibits three distinct morphological patterns: atrophy, hyperplasia, and hyperregeneration.
- Functional and barrier properties of the intestinal mucosa vary significantly across these adaptive states.
Purpose of the Study:
- To investigate the differential functional and barrier adaptations of small intestine mucosa in various conditions.
- To explore the mechanisms underlying heterogeneous tight junction adaptation in hyperregenerative states.
Main Methods:
- Comparative analysis of mucosal adaptation patterns in experimental short bowel syndrome, self-filling blind loop, and celiac sprue.
- Assessment of epithelial barrier properties and cotransport functions (Na-glucose, NaCl).
- Evaluation of tight junction complexity and investigation of cytokine effects (TNF-alpha) on tight junctions in cell models.
Main Results:
- Hyperplastic mucosa in short bowel syndrome maintained barrier function with increased Na-glucose cotransport.
- Hyperregenerative mucosa in blind loops showed impaired Na-glucose cotransport but enhanced barrier function via increased tight junction complexity.
- Hyperregenerative mucosa in celiac sprue exhibited reduced tight junction complexity.
- Tumor necrosis factor-alpha was identified as a potential factor downregulating tight junctions in intestinal cells.
Conclusions:
- Small intestine mucosal adaptation involves distinct functional and barrier changes depending on the pattern (hyperplasia vs. hyperregeneration).
- Tight junction adaptation in hyperregenerative states is heterogeneous, potentially influenced by factors like cytokines.
- Cytokines, such as tumor necrosis factor-alpha, may play a critical role in regulating intestinal epithelial barrier integrity.
