Abstract
T-cell activation in the absence of costimulation is futile because T-cells deprived of costimulatory signals enter a state of unresponsiveness or anergy. The interaction of 4-1BB and 4-1BB ligand (4-1BBL) activates an important costimulatory pathway with diverse and important roles in immune regulation. Signals relayed through 4-1BB generate strong CD8(+) T-cell responses rather than CD4(+) T-cell responses; this action results in cytokine induction and promotes T-cell survival. In recent years, 4-1BB-mediated immune regulation has gained great significance because of the seemingly contradictory dual roles of agonistic anti-4-1BB in vivo disease models. To date, agonistic 4-1BB monoclonal antibody has shown therapeutic potential against a variety of tumors, CD4(+) T-cell-mediated autoimmune diseases, and chronic graft-versus-host disease. In addition, blockade of 4-1BB/4-1BBL interaction has produced therapeutic effects against coxsackievirus-induced myocardial inflammation, herpetic stromal keratitis, and graft rejection. We propose that the dual roles of agonistic anti-4-1BB--an enhanced effector function and a suppressor function--are mediated by a novel CD11c(+)CD8(+) T-cell population.
Publication types
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
MeSH terms
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4-1BB Ligand
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Animals
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Antibodies, Monoclonal / immunology
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Antibodies, Monoclonal / therapeutic use
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Antigens, CD / immunology*
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Autoimmune Diseases / drug therapy
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Autoimmune Diseases / immunology
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Autoimmune Diseases / pathology
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Cell Survival / drug effects
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Cell Survival / immunology
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Coxsackievirus Infections / drug therapy
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Coxsackievirus Infections / immunology
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Coxsackievirus Infections / pathology
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Graft Rejection / drug therapy
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Graft Rejection / immunology
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Graft Rejection / pathology
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Graft vs Host Disease / drug therapy
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Graft vs Host Disease / immunology
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Graft vs Host Disease / pathology
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Humans
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Immunotherapy*
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Lymphocyte Activation / drug effects
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Lymphocyte Activation / immunology*
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Neoplasms / drug therapy
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Neoplasms / immunology
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Neoplasms / pathology
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Receptors, Nerve Growth Factor / antagonists & inhibitors
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Receptors, Nerve Growth Factor / immunology*
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Receptors, Tumor Necrosis Factor / antagonists & inhibitors
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Receptors, Tumor Necrosis Factor / immunology*
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Signal Transduction / drug effects
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Signal Transduction / immunology*
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T-Lymphocyte Subsets / immunology*
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T-Lymphocyte Subsets / pathology
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Tumor Necrosis Factor Inhibitors
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Tumor Necrosis Factor Receptor Superfamily, Member 9
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Tumor Necrosis Factors / immunology*
Substances
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4-1BB Ligand
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Antibodies, Monoclonal
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Antigens, CD
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Receptors, Nerve Growth Factor
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Receptors, Tumor Necrosis Factor
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TNFRSF9 protein, human
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TNFSF9 protein, human
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Tumor Necrosis Factor Inhibitors
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Tumor Necrosis Factor Receptor Superfamily, Member 9
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Tumor Necrosis Factors