Key Product Details

Species Reactivity

Validated:

Human

Cited:

Human

Applications

Validated:

ELISA, Intracellular Staining by Flow Cytometry, Immunocytochemistry, CyTOF-ready

Cited:

Immunocytochemistry

Label

Unconjugated

Antibody Source

Monoclonal Mouse IgG1 Clone # 925008

View all IL-18/IL-1F4 Antibodies »

Product Specifications

Immunogen

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

Specificity

Detects Rhesus monkey and Human IL-18/IL-1F4 in direct ELISAs.

Clonality

Monoclonal

Host

Mouse

Isotype

IgG1

Scientific Data Images for Human IL-18/IL-1F4 Antibody

IL-18/IL-1F4 antibody in Splenocytes by Immunocytochemistry (ICC).

Detection of IL‑18/IL‑1F4 in Human PBMC's.

IL-18/IL-1F4 was detected in immersion fixed human PBMC’s using Mouse Anti-Human IL-18/IL-1F4 Monoclonal Antibody (Catalog # MAB2548) at 25 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Mouse IgG Secondary Antibody (red; NL007) and counterstained with DAPI (blue). Specific staining was localized to cytoplasm. View our protocol for Fluorescent ICC Staining of Non-adherent Cells.
Detection of IL-18/IL-1F4 antibody in Human THP-1 cell line antibody by Flow Cytometry.

Detection of IL‑18/IL‑1F4 in Human THP-1 cell line by Flow Cytometry.

THP-1 Human acute monocytic leukemia cell line was stained with Mouse Anti-Human IL-18/IL-1F4 Monoclonal Antibody (Catalog # MAB2548, filled histogram) or isotype control antibody (MAB002, open histogram), followed by PE-conjugated Anti-Mouse IgG Secondary Antibody (F0102B). To facilitate intracellular staining, cells were fixed with paraformaldehyde and permeabilized with saponin. View our protocol for Staining Intracellular Molecules.
Human IL-18/IL-1F4 Antibody in ELISA Standard Curve.

Human IL‑18/IL‑1F4 ELISA Standard Curve.

Recombinant Human IL-18/IL-1F4 protein was serially diluted 2-fold and captured by Rabbit Anti-Human IL-18/IL-1F4 Monoclonal Antibody (MAB91243) coated on a Clear Polystyrene Microplate (DY990). Mouse Anti-Human IL-18/IL-1F4 Monoclonal Antibody (Catalog # MAB2548) was biotinylated and incubated with the protein captured on the plate. Detection of the standard curve was achieved by incubating Streptavidin-HRP (DY998) followed by Substrate Solution (DY999) and stopping the enzymatic reaction with Stop Solution (DY994).

Applications for Human IL-18/IL-1F4 Antibody

Application
Recommended Usage

CyTOF-ready

Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.

ELISA

This antibody functions as an ELISA detection antibody when paired with Rabbit Anti-Human IL‑18/IL‑1F4 Monoclonal Antibody (Catalog # MAB91243).

This product is intended for assay development on various assay platforms requiring antibody pairs. We recommend the Human Total IL-18 DuoSet ELISA Kit (Catalog # DY318-05) for convenient development of a sandwich ELISA or the Human Total IL-18/IL-1F4 Quantikine ELISA Kit (Catalog # DL180) for a complete optimized ELISA.

Immunocytochemistry

5-25 µg/mL
Sample: Immersion fixed human PBMC's 

Intracellular Staining by Flow Cytometry

0.25 µg/106 cells
Sample: THP-1 Human acute monocytic leukemia cell line fixed with paraformaldehyde and permeabilized with saponin.

Formulation, Preparation, and Storage

Purification

Protein A or G purified from hybridoma culture supernatant

Reconstitution

Reconstitute at 0.5 mg/mL in sterile PBS. For liquid material, refer to CoA for concentration.

Reconstitution Buffer Available:
Size / Price
Qty

Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.

Shipping

Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store immediately at the temperature recommended below.

Stability & Storage

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.

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

    Product Documents for Human IL-18/IL-1F4 Antibody

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