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A major histocompatibility complex (MHC) class I-specific T cell receptor (TCR)-transgenic mouse was used to study classical-type transplantation tolerance in the adult. Engraftment of MHC class I-incompatible bone marrow and tolerance to donor-type skin grafts were obtained using dimethylmyeleran (DMM) as a myeloablative agent and a non-depleting anti-CD8 monoclonal antibody (mAb) as the sole immunosuppressant. Surprisingly, bone marrow engraftment was facilitated by host CD4+ T cells, a subset normally considered unable to reject class I MHC-incompatible grafts. A combination of mAb to interleukins (IL)-4 and -10 antagonized the "permissive" effects of host CD4+ T cells, indicating a possible role for Th2-type immunoregulation that can act on CD8+ T cells in this form of transplantation tolerance. The fate of graft-reactive T cells was monitored using anti-clonotypic antibodies. It was observed that bone marrow engraftment then led to peripheral deletion of mAb-blockaded, clonotype+ CD8+ T cells.

Original publication




Journal article


Eur J Immunol

Publication Date





1663 - 1670


Animals, Antibodies, Blocking, Antibodies, Monoclonal, Bone Marrow Transplantation, CD4-Positive T-Lymphocytes, CD8-Positive T-Lymphocytes, Clonal Deletion, Cytokines, Graft Enhancement, Immunologic, Graft Rejection, Immune Tolerance, Lymphocyte Activation, Lymphocyte Depletion, Mice, Mice, Inbred CBA, Skin Transplantation, Spleen, Th2 Cells