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- W1511580600 abstract "Abstract Donor-specific allograft tolerance can be induced in the adult rat by pregraft donor-specific blood transfusion (DST). This tolerance appeared to be mediated by regulatory cells and to the production of the suppressive cytokine TGF-β1. A potential immunoregulatory CD8+ clone bearing a Vβ18-Dβ1-Jβ2.7 TCR gene rearrangement was previously identified in DST-treated recipients. To assess the functional role of this T cell clone in the induction of tolerance by DST, we have vaccinated DST-treated recipients with a plasmid construct encoding for the Vβ18-Dβ1-Jβ2.7 TCR β-chain. DST-induced allograft tolerance was abolished by anti-TCR Vβ18-Dβ1-Jβ2.7 DNA vaccination in six of seven recipients, whereas vaccination with the vector alone, or with the construct encoding a TCR Vβ13 β-chain, had no effect. However, the transcript number of the Vβ18-Dβ1-Jβ2.7 chain was unchanged in allografts from vaccinated DST-treated rats, suggesting that this clone was not depleted by vaccination, but rather was altered in its function. Moreover, TCR Vβ18-Dβ1-Jβ2.7 DNA vaccination restored the anti-donor alloantibody production, partially restore the capacity of spleen cells from tolerized recipients to proliferate in vitro against donor cells, and decreased the inhibitory effect of TGF-β1, seen in DST-treated recipients, in spleen cells from vaccinated DST-treated ones. This study strongly suggests that this CD8+ TCR Vβ18-Dβ1-Jβ2.7 T cell clone has an effective immunoregulatory function in allograft tolerance induced by DST." @default.
- W1511580600 created "2016-06-24" @default.
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- W1511580600 date "2000-07-01" @default.
- W1511580600 modified "2023-10-17" @default.
- W1511580600 title "Anti-TCR-Specific DNA Vaccination Demonstrates a Role for a CD8+ T Cell Clone in the Induction of Allograft Tolerance by Donor-Specific Blood Transfusion" @default.
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- W1511580600 doi "https://doi.org/10.4049/jimmunol.165.1.96" @default.
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