iLite® TNF-alpha Assay Ready Cells


The Eagle Bio iLite Assay Ready Cells are designed for the specific detection of drug potency in serum/plasma as well as neutralizing antibodies in serum/plasma. They utilize an assay technique called reporter gene assay ( RPG ) to analyze serum/plasma samples. The reporter genes utilized are encoded with a bioluminescent luciferase (Firefly luciferase). Different levels of luminescence detected from each reporter gene cell indicates different levels of expression. The iLite® TNF-alpha Assay Ready Cells are for research use only and not for use in diagnostic procedures.

iLite® TNF-alpha Assay Ready Cells

For Research Use Only

The Eagle Biosciences iLite® TNF-alpha Assay Ready Cells that use luciferase generated bioluminescence are intended for:

    • screening assays for anti-TNF-alpha activity
    • testing NAb anti-TNF-alpha activity

Content: 1.5 ml of Assay Ready Cells suspended in RPMI 1640 with 20% heat inactivated fetal bovine serum (FBS), 10% glycerol, and 2.5% dimethyl sulfoxide (DMSO) .
Storage: -80°C, Cells should be used within 30 min of thawing.

Application notes for the following assays are available:

Product Developed and Manufactured by Svar Life Science

Additional Information


TNF-alpha promotes inflammatory responses, which, in turn, contribute to the clinical problems associated with many inflammatory disorders, including rheumatoid arthritis, ankylosing spondylitis, Crohn’s disease, psoriasis and refractory asthma. These diseases are sometimes treated with monoclonal anti-TNF-alpha antibody constructs, including infliximab (Remicade), adalimumab (Humira), etanercept (Enbrel), certolizumab pegol (Cimzia), or golimumab (Simponi). Prolonged therapies with these TNF-alpha inhibitors may lead to development of neutralizing antibodies (NAbs) which may counteract the TNF-alpha antagonist activity of the drugs. The iLite® TNF-alpha reporter cells are engineered cells for use in a normalized reporter gene bioassay for screening of anti-TNF-alpha activity in samples. The assay is a simple and easy test format which detects anti-TNF-alpha activity and, indirectly, the presence of anti-drug antibodies.

Why Choose the iLite® TNF-alpha Assay Ready Cells?

  • iLite technology employs the cells’ inherent signaling pathways – a true model of cellular events
  • Assay Ready Cells – no culturing required!
  • No protein tagging or labeling required
  • Short assay times
  • TNF-alpha inhibitor activity: 30min + 3h
  • Neutralizing antibodies: 30min + 30 min + 3h
  • Highly reproducible between batches
  • Normalization gene allows for consistent results
  • Adjusts for serum matrix effects and differences in cell number

Assay Range

  • anti TNF Drug Assays: IFX Drug 10-40ng/mL, ALD Drug 5-30 ng/mL, ETN Drug 2-10 ng/mL
  • Neutralizing antibodies to anti TNF drug: 20 – 2560 Antibody Titer. Samples can be further diluted to detect higher titer samples, there is no maximum range of detection.

Specificity of the response of the iLite TNF-alpha Assay Ready Cells

Key benefits of iLite® Assays

  • Highly specific reporter gene cell lines
  • Very sensitive cell line responses (>10 fold inductions)
  • Assay Ready Cells – ready-to-use from the freezer, without culturing of cells
  • Assays within a workday (typically 4-7 hour assays)
  • Normalization gene, which eliminates unwanted matrix effects


Product Manual


Article about iLite Assay Ready Cells

  • Quantification of the Neutralizing Antibody Response Using Reporter Gene Assay
  • References (using these cells)

    • Lallemand C, Kavrochorianou A, Steenholdt C, Bendtzen K, Ainsworth MA, Meritet J-F, Blanchard B, Lebon P, Taylor P, Charles P, Alzabin S, Tovey MG. Reporter gene assay for the quantification of the activity and neutralizing antibody response to TNF-alpha antagonists. J Immunol Meth. 2011, 373: 229-239.
    • Pavlov I, Carper J, Lázár-Molnár E, Delgado JC. Clinical laboratory application of a reporter-gene assay for measurement of functional activity and neutralizing antibody response to infliximab. Clinica Chimica Acta. 2016, 453:147-153.