Small intestine transplant immunologic risk assessment: More data is needed

Area of Science:

• Transplantation Immunology
• Gastroenterology
• Organ Transplantation

Background:

• Intestinal transplantation (IT) is the sole option for irreversible intestinal failure unresponsive to parenteral nutrition.
• Donor-specific antibodies (DSA) are implicated in IT graft rejection, yet evidence is primarily from single-center studies.
• The International Intestinal Transplant Registry (IITR) offers a potential multicenter data source for immunologic analysis.

Purpose of the Study:

• To investigate the association between donor-specific antibodies (DSA) and intestinal transplant (IT) rejection using IITR data.
• To evaluate the impact of HLA mismatch and patient demographics on IT outcomes within the IITR.
• To assess the feasibility of multicenter immunologic research using the IITR database.

Main Methods:

• Data on demographics, outcomes, and HLA serology from donor/recipient pairs were extracted from the IITR.
• Analysis included rejection, graft survival, and patient survival, stratified by age, DSA status, and molecular HLA mismatch.
• Eplet mismatch analysis was conducted using HLAMatchmaker software.

Main Results:

• Significant limitations were identified in the granularity and completeness of immunological data within the IITR.
• The available data did not permit a thorough immunologic examination of IT rejection.
• HLA mismatch and DSA reporting showed variability, impacting detailed analysis.

Conclusions:

• The IITR database holds promise for multicenter analysis of intestinal transplantation (IT) outcomes.
• Current data limitations restrict comprehensive immunologic investigations, particularly regarding DSA and rejection.
• Improvements in data collection are needed to fully leverage the IITR for advancing IT research.