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- W2011502022 abstract "Dendritic cells (DC) are the most potent presenters of alloantigens and therefore are responsible for the induction of allograft rejection. Genetic modifications of DC allowing the expression of a tolerogenic molecule may render them immunosuppressive. We transduced bone marrow-derived DC with recombinant MFG retrovirus encoding either viral interleukin (vIL)-10 or Fas ligand (FasL) to induce transplantation tolerance. Up to 10 ng/ml of bioactive vIL-10 was produced by DC after transfer of the corresponding gene. Although the inhibitory properties of vIL-10-transduced DC were revealed in vitro in a mixed lymphocyte culture, no clear down-regulation of the allogeneic response was observed in vivo after single or multiple injections of those DC overexpressing vIL-10. When we transduced wild-type bone marrow-derived DC with recombinant MFG retrovirus encoding murine FasL, cells quickly died, probably because of suicidal or fratricidal Fas-dependent death. Indeed, only DC from Fas-deficient lpr mice survived to FasL gene transfer. Those FasL-transduced lpr DC exhibited a strong cytotoxic activity against Fas-positive targets in vitro. DC overexpressing FasL did not behave as immunosuppressive DC in vivo. The subcutaneous injection of FasL+ lpr DC in MHC class II-disparate mice hyperactivated the allospecific proliferation of T cells in the draining lymph nodes compared with mice treated with control-transduced DC. These results argue against the development of FasL+ DC or vIL-10-secreting DC as immunosuppressive tools in vivo. The alternative pathways of T-cell activation triggered by these genetically modified DC need to be investigated." @default.
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- W2011502022 date "2002-01-01" @default.
- W2011502022 modified "2023-10-16" @default.
- W2011502022 title "DENDRITIC CELLS TRANSDUCED WITH VIRAL INTERLEUKIN 10 OR FAS LIGAND: NO EVIDENCE FOR INDUCTION OF ALLOTOLERANCE IN VIVO" @default.
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- W2011502022 doi "https://doi.org/10.1097/00007890-200201151-00010" @default.
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