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Endothelial chimerism after ABO-incompatible kidney transplantation.
Tatsu Tanabe1, Hideki Ishida, Shigeru Horita
1Department of Urology, Tokyo Women's Medical University, Tokyo, Japan. tanabetatsu@live.jp
Transplantation
|March 30, 2012
Summary
Endothelial chimerism in kidney transplants indicates significant immune responses like rejection, not tolerance. This finding impacts graft survival rates, highlighting the need for further research into its mechanisms and clinical implications.
Area of Science:
- Transplantation immunology
- Nephrology
- Histopathology
Background:
- Endothelial chimerism, recipient cells in donor organs, has unclear mechanisms.
- Its role in ABO-incompatible kidney transplantation requires investigation.
Purpose of the Study:
- Investigate endothelial chimerism in ABO-incompatible kidney transplant recipients.
- Analyze the association between chimerism and clinical outcomes/histopathology.
Main Methods:
- Immunohistochemical detection of blood group antigens in renal allografts.
- Assessment of chimerism, clinical course, and histopathological changes in 49 patients.
Main Results:
- Endothelial chimerism detected in 24.5% of patients.
- Chimerism associated with antibody-mediated rejection and calcineurin inhibitor toxicity.
- Significantly lower graft survival rates observed in patients with chimerism (P<0.0001).
Conclusions:
- Endothelial chimerism is a marker of intense immune or nonimmune responses.
- It is not indicative of transplant tolerance.
- Associated with poorer long-term graft survival in kidney transplantation.
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