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Specific tolerance induction and organ transplantation
A de Vries-van der Zwan1, A C Besseling, M A van der Pol
1Department of Transplantation Immunology, Central Laboratory of the Netherlands Red Cross Blood Transfusion Service, University of Amsterdam.
Leukemia & Lymphoma
|August 28, 1998
Summary
This study shows a new method using anti-CD3, anti-CD4, low-dose total body irradiation (TBI), and bone marrow cells to achieve donor-specific transplant tolerance. This approach avoids long-term immunosuppression, reducing infection and malignancy risks.
Area of Science:
- Immunology
- Transplantation Biology
- Medical Research
Background:
- Long-term immunosuppression after organ transplantation increases infection and malignancy risks.
- Inducing donor-specific tolerance is crucial to eliminate the need for these drugs.
Purpose of the Study:
- To establish a murine model for inducing stable, donor-specific tolerance across major histocompatibility barriers.
- To assess the feasibility of a combined immunosuppressive and bone marrow transplantation regimen.
Main Methods:
- Utilized a single dose of anti-CD3 and anti-CD4 antibodies.
- Administered low-dose total body irradiation (TBI).
- Transplanted allogeneic bone marrow cells concurrently with skin grafting.
Main Results:
- Achieved stable multilineage mixed chimerism.
- Demonstrated sustained immunocompetence in recipients.
- Established permanent donor-specific skin graft tolerance across full MHC barriers.
- Showed that same-day preparative regimen and transplantation are effective.
- Indicated reduced irradiation dose is sufficient for haploidentical combinations.
Conclusions:
- The described protocol successfully induces donor-specific transplant tolerance in a murine model.
- This method offers a promising alternative to long-term immunosuppression.
- The protocol's adaptability, including reduced irradiation, moves it closer to clinical application.