Transplant nephrectomy after allograft failure is associated with allosensitization

Area of Science:

• Nephrology
• Immunology
• Transplantation

Background:

• Renal allograft failure necessitates management strategies to address immunological challenges.
• Understanding the impact of transplant nephrectomy (TN) on antibody levels is crucial for managing sensitized patients.

Purpose of the Study:

• To evaluate the effect of transplant nephrectomy (TN) on panel reactive antibody (%PRA) and donor-specific antibody (DSA) levels in patients with renal allograft failure.

Main Methods:

• Retrospective review of patients undergoing TN for failed kidney transplants (2000-2007).
• Analysis of pre- and post-TN serum samples for human leukocyte antigen (HLA) typing, %PRA, and DSA levels using serologic techniques and solid-phase assays.
• Statistical comparison using Wilcoxon signed rank test and multivariate regression analysis.

Main Results:

• Mean %PRA significantly increased post-TN for both class I (33.4% to 75.6%) and class II (38.9% to 60.6%) antigens.
• Mean DSA levels also significantly increased post-TN for class I (33,518 to 121,457 MESF) and class II (45,459 to 126,968 MESF) antigens.
• Rejection episodes and TN within 10 months of graft failure were associated with greater increases in %PRA and DSA levels.

Conclusions:

• Transplant nephrectomy in patients with renal allograft failure leads to increased %PRA and DSA levels, indicating sensitization.
• Rejection episodes and early TN post-graft failure may exacerbate this sensitization.