Refined techniques for intestinal transplantation in rat

Area of Science:

• Surgical Innovation
• Transplantation Biology
• Gastroenterology

Background:

• Intestinal transplantation (IT) faces significant challenges, including rejection, graft-versus-host disease (GVHD), and infection, leading to disappointing human outcomes.
• Studying IT in animal models is crucial for advancing the field.
• Existing IT models often require complex surgical techniques and specialized equipment.

Purpose of the Study:

• To develop and validate a simplified surgical technique for orthotopic intestinal transplantation (OIT) in a rat model.
• To improve the success rate and reduce complications associated with intestinal transplantation.
• To provide a reproducible model for studying IT challenges.

Main Methods:

• A simplified
• three cuffs
• technique for vascular reconstruction was developed, eliminating the need for a microscope and traditional sutures.
• (1) A
• double cuffs
• technique was used for the graft aorta.
• (2) A portal cuff anastomosis was created for physiologic portal graft drainage.
• (3) Large volumes of crystalloid or whole blood were administered to maintain blood pressure and minimize ischemic injury.

Main Results:

• The simplified OIT technique resulted in a high recipient survival rate of 87.5% (21 out of 24 rats).
• The average blood loss during surgery was minimal, less than 1 mL.
• The cold ischemic time for the graft was maintained at an average of 50 +/- 11 minutes.

Conclusions:

• The simplified
• three cuffs
• technique offers a reproducible and effective method for rat intestinal transplantation.
• This improved surgical model facilitates further research into overcoming major obstacles in IT.
• The technique's high success rate and minimal complications demonstrate its potential for advancing IT research.