Interleukin-18 binding protein: a novel modulator of the Th1 cytokine response.
Copyright policy )Interleukin-18 binding protein: a novel modulator of the Th1 cytokine response.
An interleukin-18 binding protein (IL-18BP) was purified from urine by chromatography on IL-18 beads, sequenced, cloned, and expressed in COS7 cells. IL-18BP abolished IL-18 induction of interferon-gamma (IFNgamma), IL-8, and activation of NF-kappaB in vitro. Administration of IL-18BP to mice abrogated circulating IFNgamma following LPS. Thus, IL-18BP functions as an inhibitor of the early Th1 cytokine response. IL-18BP is constitutively expressed in the spleen, belongs to the immunoglobulin superfamily, and has limited homology to the IL-1 type II receptor. Its gene was localized on human chromosome 11q13, and no exon coding for a transmembrane domain was found in an 8.3 kb genomic sequence. Several Poxviruses encode putative proteins highly homologous to IL-18BP, suggesting that viral products may attenuate IL-18 and interfere with the cytotoxic T cell response.
Lipopolysaccharides, DNA, Complementary, Interferon Inducers, Base Sequence, Poxviridae, Molecular Sequence Data, Interleukin-18, Exons, Introns, Recombinant Proteins, Interferon-gamma, Mice, COS Cells, Animals, Cytokines, Humans, Amino Acid Sequence, Cloning, Molecular, Carrier Proteins, Injections, Intraperitoneal
Lipopolysaccharides, DNA, Complementary, Interferon Inducers, Base Sequence, Poxviridae, Molecular Sequence Data, Interleukin-18, Exons, Introns, Recombinant Proteins, Interferon-gamma, Mice, COS Cells, Animals, Cytokines, Humans, Amino Acid Sequence, Cloning, Molecular, Carrier Proteins, Injections, Intraperitoneal
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