Abstract
Lichen planus (LP) is a chronic inflammatory mucocutaneous disease. The inflammatory status of LP may be related to S100A8 (myeloid-related protein 8; MRP8) activation of cytotoxic cells. The aims of this study were to evaluate S100A8 expression in skin lesions and the in vitro effects of S100A8 on CD8+ T cells and natural killer (NK) cells in LP. Increased levels of S100A8/S100A9 were detected in the skin lesions as well as in the sera of subjects with LP. S100A8 expression induced an increased cytotoxic response by peripheral blood CD8+CD107a+ T cells as well as by NK CD56bright cells in patients with LP. Increased expression of interleukin (IL)-1β, tumour necrosis factor (TNF) and IL-6 in the CD8+ T cells of patients with LP was induced by S100A8, in contrast to the control group that produced IL- 10 and interferon (IFN) type I genes. These data suggest that, in individuals with LP, S100A8 may exert distinct immunomodulatory and cytotoxicity functions.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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CD56 Antigen / immunology
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CD56 Antigen / metabolism
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CD8-Positive T-Lymphocytes / immunology
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CD8-Positive T-Lymphocytes / metabolism*
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Calgranulin A / immunology
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Calgranulin A / metabolism*
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Calgranulin B / immunology
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Calgranulin B / metabolism
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Case-Control Studies
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Cells, Cultured
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Cytokines / genetics
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Cytokines / immunology
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Cytokines / metabolism*
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Humans
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Inflammation Mediators / immunology
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Inflammation Mediators / metabolism*
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Killer Cells, Natural / immunology
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Killer Cells, Natural / metabolism
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Lichen Planus / genetics
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Lichen Planus / immunology
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Lichen Planus / metabolism*
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Lichen Planus / pathology
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Lysosomal-Associated Membrane Protein 1 / immunology
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Lysosomal-Associated Membrane Protein 1 / metabolism
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Signal Transduction
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Skin / immunology
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Skin / metabolism*
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Skin / pathology
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Toll-Like Receptor 4 / immunology
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Toll-Like Receptor 4 / metabolism
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Up-Regulation
Substances
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CD56 Antigen
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Calgranulin A
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Calgranulin B
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Cytokines
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Inflammation Mediators
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Lysosomal-Associated Membrane Protein 1
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NCAM1 protein, human
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TLR4 protein, human
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Toll-Like Receptor 4