Abdominal Wall Transplantation: Skin as a Sentinel Marker for Rejection

Area of Science:

• Transplantation immunology
• Gastroenterology
• Surgical innovation

Background:

• Abdominal wall transplantation (AWTX) is a key technique for complex abdominal closure post-intestinal transplantation (ITX).
• The immunological role of the transplanted abdominal wall (AW) in diagnosing post-transplant bowel dysfunction requires further investigation.

Purpose of the Study:

• To evaluate the impact of AWTX on patient and graft survival after ITX.
• To determine if the AW skin serves as a sentinel marker for immunological activity and aids in differential diagnosis of bowel dysfunction.

Main Methods:

• Retrospective analysis of 29 intestinal transplantations in 28 patients (2008-2014).
• Comparison between a solid organ transplant (SOT) group and a SOT-AWTX group.
• Standardized induction (alemtuzumab) and maintenance (tacrolimus) immunosuppression protocols were used.

Main Results:

• Patient survival was similar (67% vs. 61%) between groups.
• The SOT-AWTX group demonstrated faster recovery, superior graft survival (79% vs. 60%), and lower rejection rates (7% vs. 27%).
• The SOT-AWTX group had fewer misdiagnoses of viral infection as rejection (14% vs. 33%).

Conclusions:

• AWTX is associated with improved intestinal graft survival and reduced rejection rates.
• The AW skin functions as an immune modulator and sentinel marker, crucial for accurate diagnosis and optimizing immunosuppression.
• This approach aids in preventing graft rejection and avoiding over-immunosuppression for non-graft-related bowel dysfunction.