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  • 1
    ISSN: 1432-2277
    Keywords: Key words Thymus ; MHC antigen ; Heart transplantation ; Immunosuppression ; Gene therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Thymic selection of self and non-self-reactive lymphocytes is a process that may be targeted to induce donor-specific immunologic unresponsiveness in organ transplantation. In the present study, gene transfer was used to preexpose the recipient thymus to soluble donor-specific MHC class I molecules prior to heart transplantation in the high-responder ACI (RT1a) to Lewis (RT1l) rat strain combination. Specifically, cultured Lewis hepatocytes were transfected with DNA encoding a secreted form of the donor allo-MHC class I antigen, RT1.Aa. Seven days prior to ACI heart transplantation, genetically altered recipient-strain hepatocytes were injected into the thymus of Lewis recipients which also received a dose of antilymphocyte serum (ALS). Results showed that treatment with both ALS and soluble donor MHC-expressing hepatocytes prolonged transplant survival time by twofold, compared to injection of control hepatocytes and ALS. Therefore, intrathymic gene therapy delivery of soluble donor MHC molecules may be useful for promoting allograft survival in heart transplantation.
    Type of Medium: Electronic Resource
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