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- W2127940865 abstract "Abstract Tumor-targeted vaccines represent a strategy to enhance the graft-versus-leukemia effect after allogeneic blood and marrow transplantation (BMT). We have previously shown that graft-versus-host disease (GVHD) can negatively impact quantitative responses to vaccines. Using a minor histocompatibility Ag–mismatched BMT (B6→B6 × C3H.SW) followed by adoptive transfer of HY-specific T cells and HY-expressing dendritic cells, we assessed whether GVHD induced by donor lymphocyte infusion (DLI) affects the persistence, proliferation, and survival of vaccine-responding, nonalloantigen reactive T cells. Both CD8+ and CD4+ HY-specific T cells undergo less vaccine-driven proliferation in allogeneic recipients with GVHD. Although vaccine-responding CD8+ T cells show decreased IFN-γ and CD107a production, CD4+ T cells exhibit increased programmed death 1 and T cell Ig mucin-like domain 3 expression. In addition, the degree of apoptosis in vaccine-responding CD8+ T cells was higher in the presence of GVHD, but there was no difference in CD4+ T cell apoptosis. Using Fas ligand–deficient or TRAIL-deficient DLI had no impact on apoptosis of HY-specific T cells. However, perforin-deficient alloreactive DLI induced significantly less apoptosis of vaccine-responding CD8+ T cells and resulted in enhanced tumor protection. Thus, diminished vaccine responses during GVHD result from impaired proliferation of CD8+ and CD4+ T cells responding to vaccination, with an additional contribution from perforin-mediated CD8+ T cell apoptosis. These results provide important insights toward optimizing vaccine responses after allogeneic BMT." @default.
- W2127940865 created "2016-06-24" @default.
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- W2127940865 date "2013-02-01" @default.
- W2127940865 modified "2023-10-03" @default.
- W2127940865 title "Graft-versus-Host Disease Impairs Vaccine Responses through Decreased CD4+ and CD8+ T Cell Proliferation and Increased Perforin-Mediated CD8+ T Cell Apoptosis" @default.
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- W2127940865 doi "https://doi.org/10.4049/jimmunol.1200391" @default.
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