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Induction of tolerance in quadruple chimeric mice
Tian-Xue Fan1, Hiroko Hisha, Tie-Nan Jin
1Department of Pathology, Kansai Medical University, Moriguchi, Osaka 570-8506, Japan.
Stem Cells (Dayton, Ohio)
|September 3, 2004
Summary
Combining cord blood (CB) from multiple donors can improve transplantation outcomes. This study demonstrates that mixed CB transplantation in mice successfully achieved reconstitution and induced tolerance, suggesting potential for human applications.
Area of Science:
- Immunology
- Hematology
- Transplantation Science
Background:
- Human cord blood (CB) is a source of hematopoietic stem cells but is limited in volume.
- Combining CB from multiple donors is necessary for widespread transplantation.
Purpose of the Study:
- To investigate the feasibility and efficacy of mixed cord blood transplantation.
- To assess hematopoietic reconstitution and immune tolerance in chimeric mice.
Main Methods:
- Mice received T cell-depleted bone marrow cells (BMCs) from three allogeneic strains.
- Hematopoietic organs and peripheral blood were analyzed post-transplantation.
- Mixed-lymphocyte reactions and PCR were used to assess immune tolerance.
Main Results:
- Triple BMC injection resulted in higher survival rates compared to single-strain injections.
- Mixed chimeric mice showed multi-lineage reconstitution and tolerance to donor and recipient major histocompatibility complex determinants.
- Donor-specific tolerance was maintained even when donor cells were undetectable in peripheral blood.
Conclusions:
- Mixed CB transplantation can achieve successful hemato-lymphoid reconstitution and stable tolerance.
- This approach indicates the potential for mixed CB transplantation in human therapies.