Abstract
Active human dendritic cells (DCs), which efficiently induce immune responses through their functions as antigen-presenting cells, exhibit direct anti-tumour killing activity in response to some pathogens and cytokines. These antigen-presenting and tumour killing abilities may provide a breakthrough in cancer immunotherapy. However, the mechanisms underlying this killer DC activity have not been fully proven, despite the establishment of interferon-α (IFN-α)-generated killer DCs (IFN-DCs). Here mature IFN-DCs (mIFN-DCs), generated from IFN-DCs primed with OK-432 (streptococcal preparation), exhibited elevated expression of CD86 and human leukocyte antigen-DR (minimum criteria for DC vaccine clinical trials) as well as antigen-presenting abilities comparable with those of mature IL-4-DCs (mIL-4-DCs). Interestingly, the killing activity of mIFN-DCs, which correlated with the expression of CD56 (natural killer cell marker) and was activated via the tumour necrosis factor-related apoptosis-inducing ligand (TRAIL) and Fas ligand pathway, was stronger than that of IFN-DCs and remarkably stronger than that of mIL-4-DCs. Therefore, mIFN-DCs exhibit great potential as an anti-cancer vaccine that would promote both acquired immunity and direct tumour killing.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Antigen Presentation
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B7-2 Antigen / genetics
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B7-2 Antigen / immunology
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CD56 Antigen / genetics
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CD56 Antigen / immunology
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Cancer Vaccines / biosynthesis
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Cell Differentiation / drug effects
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Cytotoxicity, Immunologic*
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Dendritic Cells / cytology
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Dendritic Cells / drug effects*
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Dendritic Cells / immunology
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Dinoprostone / pharmacology
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Fas Ligand Protein / genetics*
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Fas Ligand Protein / immunology
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Gene Expression Regulation
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Granulocyte-Macrophage Colony-Stimulating Factor / pharmacology
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HLA-DR Antigens / genetics
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HLA-DR Antigens / immunology
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Humans
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Immunophenotyping
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Interferon-alpha / pharmacology*
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Interleukin-4 / pharmacology*
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Monocytes / cytology
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Monocytes / drug effects
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Monocytes / immunology
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Picibanil / pharmacology*
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Primary Cell Culture
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Signal Transduction
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TNF-Related Apoptosis-Inducing Ligand / genetics*
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TNF-Related Apoptosis-Inducing Ligand / immunology
Substances
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B7-2 Antigen
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CD56 Antigen
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CD86 protein, human
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Cancer Vaccines
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FASLG protein, human
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Fas Ligand Protein
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HLA-DR Antigens
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IL4 protein, human
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Interferon-alpha
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NCAM1 protein, human
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TNF-Related Apoptosis-Inducing Ligand
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TNFSF10 protein, human
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Interleukin-4
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Picibanil
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Granulocyte-Macrophage Colony-Stimulating Factor
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Dinoprostone