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Updated: Aug 14, 2026
Murine Model of Intestinal Ischemia-reperfusion Injury
Published on: May 11, 2016
Transgenic mouse model of intestine-specific mucosal injury and repair
1Division of Rheumatic Diseases, Department of Medicine, University of Connecticut Health Center, Farmington 06030, USA. llefranc@neuron.uchc.edu
Abstract:
Most studies of injury and repair to mucosal tissue have used nonspecific mediators to induce injury. Damage to the mucosal epithelium resulting from chemical or radiation treatment associated with cancer therapy may fall into this category of injury. When such treatments are applied, it is generally not possible to predict or control the extent of possible injury. This fact makes analysis of inductive and reparative processes difficult. In addition, the role of the immune system in the etiology and subsequent healing of mucosal tissue following cancer therapy with or without bone marrow transplantation remains unclear. To study tissue- and antigen-specific immune damage of intestinal mucosal tissue, we generated transgenic mice that express a nominal antigen exclusively in intestinal epithelial cells. The transfer of antigen-specific CD8 T cells with concomitant virus infection resulted in the destruction of intestinal epithelial cells and disease. The destructive phase in some cases was followed by complete recovery and tolerance induction. This model will provide a system that can be regulated for analysis of the mediators of mucosa-specific tissue damage and repair.
Insights
Researchers developed a new model to study how the immune system damages and repairs intestinal mucosal tissue after cancer therapy. This model allows for controlled analysis of tissue-specific immune responses and healing processes.
Area of Science:
- Immunology
- Gastroenterology
- Oncology
Background:
- Current models for studying mucosal tissue injury use nonspecific mediators, making it difficult to analyze specific damage and repair processes.
- The role of the immune system in mucosal healing after cancer therapy, especially with bone marrow transplantation, is not well understood.
Purpose of the Study:
- To develop a novel, regulated model for investigating tissue- and antigen-specific immune damage and repair in the intestinal mucosa.
- To elucidate the mechanisms underlying mucosa-specific tissue damage and subsequent healing.
Main Methods:
- Generation of transgenic mice expressing a nominal antigen exclusively in intestinal epithelial cells.
- Induction of tissue damage via transfer of antigen-specific CD8 T cells and concomitant virus infection.
Main Results:
- The model successfully induced destruction of intestinal epithelial cells, leading to disease.
- In some cases, the destructive phase was followed by complete recovery and the induction of tolerance.
Conclusions:
- This new transgenic mouse model provides a controllable system for analyzing the mediators of mucosa-specific tissue damage and repair.
- The findings suggest a potential for immune-mediated recovery and tolerance following therapy-induced mucosal injury.
