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- W2022382385 abstract "Cells from many tumors produce transforming growth factor (TGF)-β which facilitates their escape from control by the immune system. We previously reported that nonimmunogenic cells from either of 2 transplantable mouse tumors became effective as therapeutic tumor vaccines after lentivirus-mediated shRNA interference to silence the TGF-β1 gene. We now show that cells from in vitro cultured human ovarian carcinomas (OvC) make large amounts of TGF-β1 and that this can be prevented by silencing the TGF-β1 gene. We further show that in vitro sensitization of peripheral blood mononuclear cells in the presence of either mitomycin-treated OvC cells whose TGF-β1 gene was silenced or in vitro matured dendritic cells that had been pulsed with homogenates from OvC cells with silenced TGF-β1 generated a stronger Th1/Tc1 immune response to the respective wild-type OvC and also to the OvC antigens mesothelin and HE4 as measured by ELIspot assays. The percentage of interferon-γ and tumor necrosis factor-α-producing CD4+ and CD8+ T cells increased while there were fewer cells expressing markers characteristic for regulatory T cells or myeloid-derived suppressor cells. Similar results were obtained when peripheral blood mononuclear cells from a patient with OvC were sensitized to dendritic cells pulsed with homogenate from autologous TGF-β1-silenced tumor cells, and a cytolytic lymphocyte response was generated to autologous OvC cells. Our results support clinical evaluation of TGF-β1-silenced tumor vaccines for immunotherapy of OvC." @default.
- W2022382385 created "2016-06-24" @default.
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- W2022382385 date "2012-04-01" @default.
- W2022382385 modified "2023-09-26" @default.
- W2022382385 title "Silencing of the TGF-β1 Gene Increases the Immunogenicity of Cells From Human Ovarian Carcinoma" @default.
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- W2022382385 doi "https://doi.org/10.1097/cji.0b013e31824d72ee" @default.
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