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- W2134419903 abstract "Control of antidonor activated T cells involved in allograft rejection while preserving immunocompetence is a challenging goal in transplantation. Engineered T cells expressing a viral thymidine kinase (TK) suicide gene metabolize the nontoxic prodrug ganciclovir (GCV) into a metabolite toxic only to dividing cells. We evaluated this suicide gene strategy for inducing transplantation tolerance in mice.Transgenic mice expressing TK in mature T cells were analyzed for (i) specific T-cell depletion under GCV treatment upon various stimulations; (ii) outcome of allogeneic nonvascularized skin or heart allografts under a short 14-day GCV treatment initiated at the time of transplantation; and (iii) the capacities of T cells from such allotransplanted mice to proliferate in mixed lymphocyte reactions and to induce graft-versus-host disease in irradiated recipients with the genetic background of the donor allograft.Upon in vitro or in vivo GCV treatment, only activated dividing TK T cells but not B cells were efficiently depleted. Acute rejection of allogeneic grafts was prevented and a significant prolongation of graft survival was obtained, although associated with signs of chronic rejection. Prolonged skin graft survival correlated with decreased in vitro and in vivo T-cell reactivities against donor alloantigens, whereas overall immunocompetence was preserved.Efficient and specific depletion of alloreactive TK T cells can be achieved by administrating GCV. These results open new perspectives for the control of allogeneic graft rejection using suicide gene therapy." @default.
- W2134419903 created "2016-06-24" @default.
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- W2134419903 date "2000-05-01" @default.
- W2134419903 modified "2023-10-18" @default.
- W2134419903 title "PROLONGED ALLOGRAFT SURVIVAL THROUGH CONDITIONAL AND SPECIFIC ABLATION OF ALLOREACTIVE T CELLS EXPRESSING A SUICIDE GENE1" @default.
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- W2134419903 doi "https://doi.org/10.1097/00007890-200005270-00034" @default.
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