Human IL-18/IL-1F4 Alexa Fluor® 488-conjugated Antibody

R&D Systems, part of Bio-Techne | Catalog # IC2548G

R&D Systems, part of Bio-Techne

Key Product Details

Validated by

Biological Validation

Species Reactivity

Validated:

Human

Cited:

Human

Applications

Validated:

Intracellular Staining by Flow Cytometry

Cited:

Flow Cytometry

Label

Alexa Fluor 488 (Excitation = 488 nm, Emission = 515-545 nm)

Antibody Source

Monoclonal Mouse IgG1 Clone # 925008

View all IL-18/IL-1F4 Antibodies »

Product Specifications

Immunogen

E. coli-derived recombinant human IL-18/IL-1F4
Tyr37-Asp193
Accession # Q14116

Specificity

Detects human IL-18/IL-1F4 in direct ELISAs.

Clonality

Monoclonal

Host

Mouse

Isotype

IgG1

Scientific Data Images for Human IL-18/IL-1F4 Alexa Fluor® 488-conjugated Antibody

Detection of IL-18/IL-1F4 in THP-1 cell line treated with Brefeldin A by Flow Cytometry

THP-1 cell line treated with Brefeldin A (filled histogram) vs untreated (open histogram) were stained with Mouse Anti-Human IL-18/IL-1F4 Alexa Fluor® 488-conjugated Monoclonal Antibody (Catalog # IC2548G). To facilitate intracellular staining, cells were fixed with Flow Cytometry Fixation Buffer (Catalog # FC004) and permeabilized with Flow Cytometry Permeabilization/Wash Buffer I (Catalog # FC005). View our protocol for Staining Intracellular Molecules.

Applications for Human IL-18/IL-1F4 Alexa Fluor® 488-conjugated Antibody

Application
Recommended Usage

Intracellular Staining by Flow Cytometry

0.25-1 µg/106 cells
Sample: THP-1 Human acute monocytic leukemia cell line fixed with paraformaldehyde and permeabilized with saponin
Please Note: Optimal dilutions of this antibody should be experimentally determined.

Formulation, Preparation, and Storage

Purification

Protein A or G purified from hybridoma culture supernatant

Formulation

Supplied 0.2 mg/mL in a saline solution containing BSA and Sodium Azide.

Shipping

The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

Stability & Storage

Protect from light. Do not freeze.
  • 12 months from date of receipt, 2 to 8 °C as supplied.

Background: IL-18/IL-1F4

Interleukin-18 (IL-18), also known as IL-1F4 and IFN-gamma inducing factor (IGIF), is a member of the IL-1 family of cytokines and is a key molecule in the innate immune response (1). Rhesus IL-18 is synthesized as a 24 kDa proprotein that contains a 36 amino acid (aa) propeptide and a 157 aa mature region (2). Under inflammatory conditions, the propeptide is cleaved by Caspase-1 in the cytoplasm to liberate the mature nonglycosylated 18 kDa monomeric IL-18 (3, 4). Mature rhesus IL-18 shares 96% aa sequence identity with human IL-18 and 60-76% with mouse, rat, canine, feline, and porcine IL-18. IL-18 is secreted by a variety of cell types including macrophages, dendritic cells, and epithelial cells (1, 5). Circulating mature IL-18 is sequestered by soluble IL-18 binding proteins (IL-18 BP) that inhibit IL-18 bioactivity (6). IL-18 interacts with the widely expressed IL-18 R alpha which then recruits the signaling subunit IL-18 R beta (7, 8). The IL-1 family member IL-1F7 also binds to IL-18 R alpha but does not recruit IL-18 R beta or induce signaling (9). IL-1F7 binds IL-18 BP and enhances its neutralizing effect on IL-18 activity (9). IL-18 synergizes with other cytokines to activate NK, Th1, and Th17 cells and to increase the production of IFN-gamma (1, 5, 10-12). IL-18 can also promote Th2 cytokine release which reduces the effectiveness of antiviral responses (13, 14). Increased levels of active IL-18 contribute to the severity of autoimmunity and hypertension, while deficiency of IL-18 results in symptoms of metabolic syndrome (1, 5, 15, 16). In cancer, IL-18 stimulates Th1 and NK cells to target tumor cells, but it can also promote angiogenesis, metastasis, and tumor cell immune evasion (11).

References

  1. Arend, W.P. et al. (2008) Immunol. Rev. 223:20.
  2. Giavedoni, L.D. et al. (2001) J. Interferon Cytokine Res. 21:173.
  3. Ghayur, T. et al. (1997) Nature 386:619.
  4. Gu, Y. et al. (1997) Science 275:206.
  5. Boraschi, D. and C.A. Dinarello (2006) Eur. Cytokine Netw. 17:224.
  6. Novick, D. et al. (1999) Immunity 10:127.
  7. Torigoe, K. et al. (1997) J. Biol. Chem. 272:25737.
  8. Born, T.L. et al. (1998) J. Biol. Chem. 273:29445.
  9. Bufler, P. et al. (2002) Proc. Natl. Acad. Sci. USA 99:13723.
  10. Takeda, K. et al. (1998) Immunity 8:383.
  11. Park, S. et al. (2007) Cell. Mol. Immunol. 4:329.
  12. Yoshimoto, T. et al. (1998) J. Immunol. 161:3400.
  13. Hoshino, T. et al. (2001) J. Immunol. 166:7014.
  14. Iannello, A. et al. (2009) AIDS Rev. 11:115.
  15. Rabkin, S.W. (2009) Nat. Clin. Pract. Cardiovasc. Med. 6:192.
  16. Netea, M.G. et al. (2006) Nat. Med. 12:650.

    Long Name

    Interleukin 18

    Alternate Names

    IGIF, IL-1F4, IL-1g, IL18

    Entrez Gene IDs

    3606 (Human); 16173 (Mouse); 29197 (Rat); 397057 (Porcine); 574151 (Primate)

    Gene Symbol

    IL18

    UniProt

    Q14116

    Additional IL-18/IL-1F4 Products

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    Product Specific Notices for Human IL-18/IL-1F4 Alexa Fluor® 488-conjugated Antibody


    This product is provided under an agreement between Life Technologies Corporation and R&D Systems, Inc, and the manufacture, use, sale or import of this product is subject to one or more US patents and corresponding non-US equivalents, owned by Life Technologies Corporation and its affiliates. The purchase of this product conveys to the buyer the non-transferable right to use the purchased amount of the product and components of the product only in research conducted by the buyer (whether the buyer is an academic or for-profit entity). The sale of this product is expressly conditioned on the buyer not using the product or its components (1) in manufacturing; (2) to provide a service, information, or data to an unaffiliated third party for payment; (3) for therapeutic, diagnostic or prophylactic purposes; (4) to resell, sell, or otherwise transfer this product or its components to any third party, or for any other commercial purpose. Life Technologies Corporation will not assert a claim against the buyer of the infringement of the above patents based on the manufacture, use or sale of a commercial product developed in research by the buyer in which this product or its components was employed, provided that neither this product nor any of its components was used in the manufacture of such product. For information on purchasing a license to this product for purposes other than research, contact Life Technologies Corporation, Cell Analysis Business Unit, Business Development, 29851 Willow Creek Road, Eugene, OR 97402, Tel: (541) 465-8300. Fax: (541) 335-0354.

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