Development of a mouse intestinal transplantation model

Area of Science:

• Surgical Innovation
• Transplantation Research
• Gastroenterology

Background:

• Intestinal transplantation is crucial for treating end-stage intestinal failure.
• Existing animal models have limitations in studying graft immunology.
• A robust and reproducible model is needed to advance the field.

Purpose of the Study:

• To develop and validate a heterotopic mouse jejunal transplantation model.
• To identify key technical factors for successful intestinal allotransplantation.
• To establish a platform for molecular immunological studies of intestinal grafts.

Main Methods:

• Heterotopic transplantation of proximal donor jejunum into recipient mice.
• End-to-side vascular anastomoses (aorta-aorta, portal vein-inferior vena cava).
• Refinement of surgical techniques to mitigate shock, thrombosis, and sepsis.

Main Results:

• Initial high mortality was reduced through surgical technique improvements.
• Key factors for success include minimizing ischemia, optimized anastomosis, fluid management, and antibiotic prophylaxis.
• Isografts demonstrated normal intestinal function and histology one month post-transplant.

Conclusions:

• A successful and reproducible mouse jejunal transplantation model has been established.
• This model facilitates the investigation of intestinal graft rejection and acceptance.
• It serves as a valuable tool for molecular immunology research in transplantation.