• Assay Type

  Solid Phase Sandwich ELISA

• Format

  96-well strip plate

• Range

  62.50 - 4,000 pg/mL

• Sufficient Materials

  For five 96-well plates*

• Specificity

  Please see the

* Provided that the recommended microplates, buffers, diluents, substrates and solutions are used, and the assay is run as summarized in the Assay Procedure provided.

Ancillary Reagent Kit Available  

DY008, DuoSet ELISA Ancillary Reagent Kit 2 -

This DuoSet ELISA Development kit contains the basic components required for the development of sandwich ELISAs to measure natural and recombinant human Interleukin 18/Interleukin 18 Binding Protein isoform a Complex (IL-18/IL-18 BPa Complex). The suggested diluent is suitable for the analysis of most cell culture supernate, serum, and plasma samples. Diluents for complex matrices, such as serum and plasma, should be evaluated prior to use in this DuoSet.

Product Features

• Optimized capture and detection antibody pairings with recommended concentrations save lengthy development time

• Development protocols are provided to guide further assay optimization

• Assay can be customized to your specific needs

• Economical alternative to complete kits

Kit Content

• Capture Antibody

• Detection Antibody

• Recombinant Standard

• Streptavidin conjugated to horseradish-peroxidase (Streptavidin-HRP)

Other Reagents Required

DuoSet Ancillary Reagent Kit 2 (5 plates): (Catalog # ) containing 96 well microplates, plate sealers, substrate solution, stop solution, plate coating buffer (PBS), wash buffer, and Reagent Diluent Concentrate 2.  
 
  The components listed above may be purchased separately:  
  PBS: (Catalog # ), or 137 mM NaCl, 2.7 mM KCl, 8.1 mM Na  ₂HPO  ₄, 1.5 mM KH  ₂PO  ₄, pH 7.2 - 7.4, 0.2 µm filtered  
 
  Wash Buffer: (Catalog # ), or 0.05% Tween  ^® 20 in PBS, pH 7.2-7.4  
  Reagent Diluent: (Catalog # ), or 1% BSA in PBS, pH 7.2-7.4, 0.2 µm filtered  
 
  Substrate Solution: 1:1 mixture of Color Reagent A (H  ₂O  ₂) and Color Reagent B (Tetramethylbenzidine) (Catalog # )  
 
  Stop Solution: 2 N H  ₂SO  ₄ (Catalog # )  
 
  Microplates: R&D Systems (Catalog # )  
 
  Plate Sealers: ELISA Plate Sealers (Catalog # )

Preparation and Storage

• Storage

  Store the unopened product at 2 - 8 °C. Do not use past expiration date.

Background: IL-18/IL-18 BPa Complex

Interleukin 18 (IL-18), also known as interferon-gamma-inducing factor (IGIF) and IL-1γ, is a cytokine which shares biologic activities with IL-12 and structural similarities with the IL-1 family of proteins. IL-18 was originally cloned from liver cells and has since been shown to be expressed by monocyte/macrophages, osteoblasts and keratinocytes. Caspase-1 (IL-1 beta-converting enzyme) has been implicated in the physiological processing of pro-IL-18 to IL-18. Similarly to IL-12, human IL-18 has been shown to enhance NK cell activity in PBMC cultures. Human IL-18 has also been found to induce the production IFN-γ and GM-CSF while inhibiting the production of IL-10 by PBMC. On enriched human T cells, human IL-18 can enhance Th1 cytokine production and stimulate cell proliferation via an IL-2-dependent pathway. In the mouse system, IL-18 has been shown to be a costimulatory factor for the activation of Th1, but not Th2, cells. IL-18 was found to selectively enhance the FasL-mediated cytotoxicity of Th1, but not Th0 or Th2, cells. IL-18 has also been shown to induce activated B cells to produce IFN-γ that inhibits IgE production.

• Long Name:

  Interleukin 18/Interleukin 18 Binding Protein Isoform a Complex

• Aliases:

  IL-18/IL-18 BPa Complex