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• W2098772783 abstract "Suppression of dendritic cells (DCs) is a crucial mechanism by which tumor cells escape immune recognition and elimination. We have recently reported that MHC class I antigen processing machinery (APM) component expression in human DCs is down-regulated by tumor-derived gangliosides. However, the molecular mechanisms underlying this abnormality were not identified. Thus, the aim of this work was to analyze the role of interferon regulatory factor 8 (IRF-8) in APM protein expression and the antigen presenting capacity of DCs developed in the tumor microenvironment. We demonstrate that the expression of several MHC class I APM components, including delta, MB-1, LMP-10, ERp57, and tapasin, is significantly decreased in murine DCs generated in the presence of prostate cancer cells. APM component down-regulation was associated with decreased ability of DCs to present model antigen to antigen-specific T cells. Notable, impaired antigen-presenting activity of DCs co-cultured with tumor cells was accompanied by decreased levels of IRF-8. Transduction of DCs with the silencing RNA for the IRF-8 gene also led to reduced expression of APM components in DCs and decreased antigen presenting function. Together, our data suggest that tumor-induced inhibition of antigen processing and presenting function of DCs is mediated by IRF-8, a member of the interferon regulatory factor family. These results provide a new molecular target for optimizing the generation of efficient DC vaccines for cancer therapy." @default.
• W2098772783 created "2016-06-24" @default.
• W2098772783 creator A5009039504 @default.
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• W2098772783 date "2008-08-28" @default.
• W2098772783 modified "2023-10-16" @default.
• W2098772783 title "Interferon regulatory factor 8 mediates tumor-induced inhibition of antigen processing and presentation by dendritic cells" @default.
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• W2098772783 doi "https://doi.org/10.1007/s00262-008-0579-1" @default.
• W2098772783 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4006356" @default.
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