Thymic transplantation in miniature swine: III. Induction of tolerance by transplantation of composite thymokidneys across fully major histocompatibility complex-mismatched barriers

Kazuhiko Yamada, Parsia A. Vagefi, Ryu Utsugi, Hiroshi Kitamura, Rolf N. Barth, John C. LaMattina, David H. Sachs

Research output: Contribution to journalArticle

38 Scopus citations

Abstract

Background. This study determines whether composite thymokidney (TK) grafts, created by implantation of autologous thymic tissue beneath the donor's renal capsule before transplantation, could induce allogeneic transplantation tolerance across two-haplotype fully major histocompatibility complex (MHC)-mismatched barriers in juvenile MGH-miniature swine. Methods. TK grafts were prepared by implanting autologous thymic tissue under the renal capsule of donor animals 2 to 3 months before transplantation. Four recipients were treated with a T-cell-depleting immunotoxin and received fully MHC-mismatched TK grafts plus a 12-day course of cyclosporine A (CsA). Control animals were treated with CsA alone or both CsA and immunotoxin, but with a normal kidney or a kidney implanted with autologous lymph node rather than thymus. Renal graft function was assessed by plasma creatinine levels and histologic analyses. Immunologic status was monitored by cell-mediated lympholysis assays. Results. All four recipients of fully MHC-mismatched TK transplants treated with immunotoxin and a 12-day course of CsA accepted their composite renal allografts long-term. All control recipients receiving a TK and CsA alone, a normal kidney or a composite kidney containing lymph node tissue acutely rejected their grafts. Conclusions. To our knowledge, this is the first demonstration that functional vascularized thymic grafts can induce transplantation tolerance across fully MHC-mismatched barriers in a large animal model.

Original languageEnglish (US)
Pages (from-to)530-536
Number of pages7
JournalTransplantation
Volume76
Issue number3
DOIs
StatePublished - Aug 15 2003
Externally publishedYes

ASJC Scopus subject areas

  • Transplantation

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