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Pretransplantation blood transfusion revisited
E van Twuyver1, R J Mooijaart, I J ten Berge
1Central Laboratory of The Netherlands Red Cross Blood Transfusion Service, Amsterdam.
The New England Journal of Medicine
|October 24, 1991
Summary
Blood transfusions before kidney transplants can induce tolerance if the donor and recipient share Human Leukocyte Antigen (HLA) types. This finding may improve transplant success by guiding donor selection and transfusion strategies.
Area of Science:
- Immunology
- Transplantation Science
- Genetics
Background:
- Pre-transplant blood transfusions improve organ survival, but the underlying mechanisms remain unclear.
- Murine models suggest shared histocompatibility antigens between blood donors and recipients promote allograft tolerance.
Purpose of the Study:
- To investigate how Human Leukocyte Antigen (HLA) compatibility between blood donors and recipients influences the induction of allograft tolerance.
- To determine the frequency of cytotoxic T-lymphocyte precursors specific for donor cells post-transfusion in renal transplant candidates.
Main Methods:
- Assessed cytotoxic T-lymphocyte precursor frequencies in 23 renal transplant patients before and after blood transfusion.
- Correlated T-cell responses with the presence of shared HLA antigens between blood donors and recipients.
Main Results:
- Ten of 23 patients developed T-cell nonresponsiveness to donor cells post-transfusion.
- Tolerance was observed when donors and recipients shared an HLA haplotype or specific HLA-B and HLA-DR antigens.
- Late-developing (1-2 months) and long-lasting tolerance was noted in compatible cases; no tolerance occurred in incompatible cases.
Conclusions:
- Blood transfusions with shared HLA haplotypes or antigens can induce tolerance to donor antigens.
- This discovery could inform new strategies for inducing transplant tolerance.
- Future donor selection may involve HLA matching and consideration of transfusion-induced T-cell nonresponsiveness.