After reconstitution, the protein solution is stable at -20 degree C for 3 months, at 2-8 degree C for up to 1 week.
Background: Interleukin-18 (IL-18, also known as interferon-gamma inducing factor) is a proinflammatory cytokine that belongs to the IL-1 superfamily and is produced by macrophages and other cells. IL-18 activation is induced by infection or tissue damage and contributes to disease pathology in chronic inflammation. In the presence of IL-12 or IL-15, IL-18 enhances anti-viral Th1 immune responses by inducing IFN-gamma production and the cytolytic activity of CD8+ T cells and NK cells. In the absence of IL-12 or IL-15, however, IL-18 promotes production of the Th2 cytokines IL-4 and IL-13 by CD4+ T cells and basophils. In the presence of IL-1 beta or IL-23, IL-18 induces the antigen-independent production of IL-17 by gamma delta T cells and CD4+ T cells.IL-18 also promotes myeloid dendritic cell maturation and triggers neutrophil respiratory burst.In cancer, IL-18 exhibits diverse activities including enhancing anti-tumor immunity, inhibiting or promoting angiogenesis, and promoting tumor cell metastasis.
NCBI and Uniprot Product Information
NCBI Description
The protein encoded by this gene is a proinflammatory cytokine that augments natural killer cell activity in spleen cells, and stimulates interferon gamma production in T-helper type I cells. Alternatively spliced transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Aug 2011]
Uniprot Description
IL18: Augments natural killer cell activity in spleen cells and stimulates interferon gamma production in T-helper type I cells. Belongs to the IL-1 family.
Protein type: Cytokine
Chromosomal Location of Human Ortholog: 11q22.2-q22.3
Cellular Component: extracellular space; extracellular region; cytosol
Molecular Function: protein binding; cytokine activity
Biological Process: positive regulation of granulocyte macrophage colony-stimulating factor production; positive regulation of NK T cell proliferation; natural killer cell activation; positive regulation of NF-kappaB import into nucleus; positive regulation of activated T cell proliferation; chemokine biosynthetic process; cell-cell signaling; lipopolysaccharide-mediated signaling pathway; granulocyte macrophage colony-stimulating factor biosynthetic process; angiogenesis; inflammatory response; regulation of cell adhesion; positive regulation of interleukin-17 production; positive regulation of natural killer cell proliferation; T-helper 1 type immune response; interleukin-2 biosynthetic process; T-helper 2 type immune response; MAPKKK cascade; interleukin-13 biosynthetic process; sleep; positive regulation of tissue remodeling; positive regulation of interferon-gamma production; interferon-gamma biosynthetic process; immune response; negative regulation of myoblast differentiation; positive regulation of inflammatory response
Research Articles on IL-18
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Product Notes
The IL-18 il18 (Catalog #AAA9139609) is an Active Protein produced from E Coli and is intended for research purposes only. The product is available for immediate purchase. The amino acid sequence is listed below: YFGKLESKLS VIRNLNDQVL FIDQGNRPLF EDMTDSDCRD NAPRTIFIIS MYKDSQPRGM AVTISVKCEK ISTLSCENKI ISFKEMNPPD NIKDTKSDII FFQRSVPGHD NKMQFESSSY EGYFLACEKE RDLFKLILKK EDELGDRSIM FTVQNED. It is sometimes possible for the material contained within the vial of "IL-18, Active Protein" to become dispersed throughout the inside of the vial, particularly around the seal of said vial, during shipment and storage. We always suggest centrifuging these vials to consolidate all of the liquid away from the lid and to the bottom of the vial prior to opening. Please be advised that certain products may require dry ice for shipping and that, if this is the case, an additional dry ice fee may also be required.Precautions
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