title: Induction of transplantation tolerance to fully mismatched cardiac allografts by T cell mediated delivery of alloantigen.
abstract: Induction of transplantation tolerance has the potential to allow for allograft acceptance without the need for life-long immunosuppression. Here we describe a novel approach that uses delivery of alloantigen by mature T cells to induce tolerance to fully allogeneic cardiac grafts. Adoptive transfer of mature alloantigen-expressing T cells into myeloablatively conditioned mice results in long-term acceptance of fully allogeneic heart transplants without evidence of chronic rejection. Since myeloablative conditioning is clinically undesirable we further demonstrated that adoptive transfer of mature alloantigen-expressing T cells alone into mice receiving non-myeloablative conditioning resulted in long-term acceptance of fully allogeneic heart allografts with minimal evidence of chronic rejection. Mechanistically, tolerance induction involved both deletion of donor-reactive host T cells and the development of regulatory T cells. Thus, delivery of alloantigen by mature T cells induces tolerance to fully allogeneic organ allografts in non-myeloablatively conditioned recipients, representing a novel approach for tolerance induction in transplantation.
authors.affiliation: Brigham and Women's Hospital and Children's Hospital Boston, Harvard Medical School, Boston, MA, USA.
authors.forename: Chaorui
authors.initials: C
authors.lastname: Tian
authors.forename: Xueli
authors.initials: X
authors.lastname: Yuan
authors.forename: Peter T
authors.initials: PT
authors.lastname: Jindra
authors.forename: Jessamyn
authors.initials: J
authors.lastname: Bagley
authors.forename: Mohamed H
authors.initials: MH
authors.lastname: Sayegh
authors.forename: John
authors.initials: J
authors.lastname: Iacomini
mesh_terms: D019264:Adoptive Transfer; D000818:Animals; D051858:Forkhead Transcription Factors / Q000235:genetics / Q000378:metabolism; D005786:Gene Expression Regulation; D006084:Graft Rejection / Q000276:immunology / Q000517:prevention & control*; D016027:Heart Transplantation / Q000276:immunology*; D007519:Isoantigens / Q000008:administration & dosage* / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D013601:T-Lymphocytes / Q000276:immunology*; D013997:Time Factors; D023001:Transplantation Tolerance / Q000276:immunology*; D014184:Transplantation, Homologous / Q000276:immunology*; D014916:Whole-Body Irradiation
chemical_list: D051858:Forkhead Transcription Factors; C498833:Foxp3 protein, mouse; D007519:Isoantigens
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