Optimal working dilution should be determined by the investigator.
Restrictions
For Research Use only
Concentration
1.0 mg/mL
Buffer
PBS containing 50 % glycerol, pH 7.2. No preservative is contained.
Preservative
Without preservative
Handling Advice
Avoid repeated freezing and thawing.
Storage
-20 °C
Storage Comment
Upon receipt, store (in aliqouts) at -20 °C.
Target
IL-18 (IL18)
(Interleukin 18 (IL18))
Alternative Name
Interleukin-18 / IL18
Background
Interleukin 18 (IL-18) is an 18- kDa cytokine which identified as a costimulatory factor for production of interferon-γ (IFN-γ) in response to toxic shock and shares functional similarities with IL-12. IL-18 is synthesized as a precursor 24- kDa molecule without a signal peptide and must be cleaved to produce an active molecule. IL-1 converting enzyme (ICE, Caspase-1) cleaves pro-IL-18 at aspartic acid in the P1 position, producing the mature, bioactive peptide that is readily released from the cells. It is reported that IL-18 is produced from Kupffer cells, activated macrophages, keratinocytes, intestinal epithelial cells, osteoblasts, adrenal cortex cells and murine diencephalon. IFN-γ is produced by activated T or NK cells and plays critical roles in the defense against microbiral pathogens. IFN-γ activates macrophages and enhances NK activity and B cell maturation, proliferation and Ig secretion. IFN-γ also induces expression of MHC class I and II antigens and inhibits osteoclast activation. IL-18 acts on T helper type-1 (Th1) T cells and in combination with IL-12 strongly induces them to produce IFN-γ. Pleiotropic effects of IL-18 have also been reported, such as, enhancement production of IFN-γ and GM-CSF in peripheral blood mononuclear cells, production of Th1 cytokines, IL-2, GM-CSF and IFN-γ in T cells, enhancement of Fas ligand expression by Th1 cells.Synonyms: IGIF, IL-1 gamma, IL-18, IL1 gamma, IL1F4, Iboctadekin, Interferon-gamma-inducing factor, Interleukin-1 gamma