Promega's Cookie Policy

We use cookies and similar technologies to make our website work, run analytics, improve our website, and show you personalized content and advertising. Some of these cookies are essential for our website to work. For others, we won’t set them unless you accept them. To find out more about cookies and how to manage cookies, read our Cookie Policy.

Membrane TNFα Target Cells

Click here to customize this product
Click here to customize this product

Assess the Mechanism of Action of Biologics Designed to Affect TNFα Signaling

  • Prequalified according to ICH guidelines
  • 96- and 384-well plate formats
  • No primary cell culture required
  • Supplied in convenient thaw-and-use format; also available in cell propagation model (CPM) format

Choose a Product Format

Size

Catalog number selected: J3331

$ 400.00
Your price:
Add to Cart
This product is discontinued
This product is available under our Early Access program - Learn More
This product is available under our Catalog (FT) program - Learn More
Membrane TNFα Target Cells
Thaw and Use/1X Each Component
$ 400.00
Your price: Log in
Change Configuration

Measure Effector Functions and Antibody Binding Affinity

Tumor necrosis factor alpha (TNFα) is a key cytokine involved in immune and inflammatory responses. TNFα is produced primarily by macrophages, but it can be generated by other leukocytes as well as endothelial cells, cardiomyocytes and other cell types. TNFα binding to its receptors, TNF receptor type 1 (TNFR1) and TNFR2, induces a myriad of cellular responses that are cell-context dependent. Typically, TNFα binding to TNFR1 and/or TNFR2 induces pro-inflammatory responses, such as immune cell activation, promotion of effector functions and cytokine production, as well as the acute phase response. TNFα exists in both a trimeric membrane-bound form (mTNFα) and as a soluble protein. Binding of TNFα-targeted antibodies to mTNFα-expressing cells can induce effector functions such as antibody-dependent cell-mediated cytotoxicity (ADCC) or complement-dependent cytotoxicity (CDC) to destroy the mTNFα-expressing inflammatory cells. However, such studies are hampered by the lack of model cell lines naturally expressing mTNFα.

mTNFα Target Cells are a genetically engineered cell line stably expressing TNFα on the cell surface. They are designed to be used as target cells in assays that measure the effector functions, such as ADCC and CDC, of anti-TNFα blockers. In addition, they can be used to measure antibody binding affinity to mTNFα.

Assay Components

Membrane TNFα Target Cells are provided in thaw-and-use format (Cat.# J3331, J3335). These cryopreserved cells are ready to be thawed for use in assays that measure the effector functions of anti-TNFα blockers.

Membrane TNFα Target Cells are also available in Cell Propagation Model (CPM) format (Cat.# J3322). These cryopreserved cells can be thawed, propagated and banked for long-term use.

Workflow

Standard bioassay workflow with cultured cells
Improved bioassay workflow with thaw-and-use cells

Standardized Reagents Improve Results

  • Thaw-and-use format provides significant time and labor savings over traditional methods while reducing variability.
  • Easily amenable to high-throughput workflows.

Assay Principle

17870ma

mTNFα Target Cells used to measure ADCC with the ADCC Reporter Bioassay. Following engagement with the Fc region of a relevant antibody bound to a Target Cell, ADCC Bioassay Effector Cells expressing the FcγR will transduce intracellular signals, resulting in NFAT-mediated luciferase activity that can be easily quantified.

17871ma

mTNFα Target Cells used to measure CDC with the CytoTox-Glo™ Assay. The assay measures dead-cell protease activity, and the amount of luminescence directly correlates with the percentage of cells undergoing cytotoxic stress.

Assay Performance Data

Accuracy and precision are critical to bioassays and the development of biologics. This assay was developed and prequalified according to ICH guidelines for accuracy and precision. giving it the performance characteristics required for many applications of a bioassay used for antibody drug discovery research and development.

Accuracy: Measure of how close results are to a reference or "target" value.

IntraLab Precision: Measure of repeatability from multiple assays of the same homogeneous sample under the same operating conditions over a short time (same analyst; same lab; same day).

Intermediate Precision: Measure of repeatability of multiple assays of the same homogeneous sample with different analysts or equipment or on different days.

Linearity: Ability of the assay to provide measured values that are proportional to the concentration of the sample.

 

32454752-data-target-combined

The ADCC Reporter Bioassay using mTNFα Target Cells Shows Precision, Accuracy and Linearity.

Parameter Results
Accuracy % Expected Relative Potency % Recovery
50 49.1
70 72.0
100 100.9
140 150.1
200 213.4
Repeatability (% CV) 100% (Reference) 2.1
Intermediate Precision (% CV)   9.4
Linearity (r2)   0.9991
Linearity (y = mx + b)   y = 1.099x – 6.024
A 50–200% simulated potency series of infliximab was analyzed in triplicate in three independent experiments performed on three days by two analysts using mTNFα Target Cells in the ADCC Reporter Bioassay. Bio-Glo™ Reagent was added and luminescence quantified using the GloMax® Discover System. Data were analyzed and relative potencies calculated after parallelism determination using JMP® software. Data were generated using thaw-and-use cells.

 

17855ma

The ADCC Reporter Bioassay with mTNFα Target Cells measures the activity of the anti-TNFα antibodies infliximab (Panel A) and adalimumab (Panel B). mTNFα Target Cells were added to a 96-well assay plate 18 hours prior to the assay. On the day of the assay, ADCC Effector Cells and a titration of infliximab or adalimumab were added. After a 24-hour induction at 37°C, Bio-Glo™ Luciferase Reagent was added and luminescence measured using the GloMax® Discover System. Data were fitted to a four-parameter logistic curve using GraphPad Prism® software. The EC50 was 148ng/ml for infliximab and 10.7ng/ml for adalimumab. Fold induction was 4.9 and 2.9 for infliximab and adalimumab, respectively.

 

17856ma

A CDC assay measures the activity of the anti-TNFα antibodies infliximab (Panel A) and adalimumab (Panel B). mTNFα Target Cells were added to a 96-well assay plate 18 hours prior to the assay. On the day of assay, 10% CDC-Qualified Human Serum and a titration of infliximab or adalimumab were added. After a 6-hour induction at 37°C, CytoTox-Glo™ Cytotoxicity Reagent was added and luminescence measured using the GloMax® Discover System. Data were fitted to a four-parameter logistic curve using GraphPad Prism® software. Infliximab gave an EC50 of 0.73µg/ml, fold induction of 7.7 and specific lysis of 40.2%. With adalimumab, the EC50 was 0.19µg/ml, the fold induction was 15.7 and the specific lysis was 37.1%.

Specifications

You are viewing: J3331 Change Configuration

What's in the box?

Item Part # Size

Membrane TNFα Target Cells

J333A 1 × 0.5ml

Certificate of Analysis

Search by lot number

Use Restrictions

Not For Medical Diagnostic Use.

Storage Conditions

XX

Please see the Protocol for detailed storage conditions.

Patents and Disclaimers

NOT FOR MEDICAL DIAGNOSTIC USE. FOR IN VITRO USE ONLY. BY USE OF THIS PRODUCT, RECIPIENT AGREES TO BE BOUND BY THE TERMS OF THIS LIMITED USE STATEMENT. If the recipient is not willing to accept the conditions of this limited use statement, and the product is unused, Promega will accept return of the unused product and provide the recipient with a full refund.

This product may not be further sold or transferred by the recipient and may be used only by the recipient, and then only for (1) research use; (2) discovery, development and monitoring of biologic drugs and vaccines; (3) quality assurance testing of biologic drugs and vaccines; and (4) product release assays for biologic drugs and vaccines. No other commercial use is allowed. “Commercial use” means any and all uses of this product by recipient for monetary or other consideration, including providing a service, information or data to unaffiliated third parties, and resale of this product for any use. Recipient has no right to propagate, modify, derivatize, genetically engineer or otherwise create variations of the cells or genes stably transfected within the cells. In addition, recipient must use luminescent assay reagents purchased from Promega for all luminescence-based assays using this product, or contact Promega to obtain a license for use of this product with reagents other than Promega’s. PROMEGA MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING AS TO MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE WITH REGARDS TO THIS PRODUCT. The terms of this agreement shall be governed under the laws of the State of Wisconsin, USA.

Product cannot be used for proficiency testing.

Specifications

You are viewing: J3335 Change Configuration

What's in the box?

Item Part # Size

Membrane TNFα Target Cells

J333A 5 × 0.5ml

Certificate of Analysis

Search by lot number

Use Restrictions

Not For Medical Diagnostic Use.

Storage Conditions

XX

Please see the Protocol for detailed storage conditions.

Patents and Disclaimers

NOT FOR MEDICAL DIAGNOSTIC USE. FOR IN VITRO USE ONLY. BY USE OF THIS PRODUCT, RECIPIENT AGREES TO BE BOUND BY THE TERMS OF THIS LIMITED USE STATEMENT. If the recipient is not willing to accept the conditions of this limited use statement, and the product is unused, Promega will accept return of the unused product and provide the recipient with a full refund.

This product may not be further sold or transferred by the recipient and may be used only by the recipient, and then only for (1) research use; (2) discovery, development and monitoring of biologic drugs and vaccines; (3) quality assurance testing of biologic drugs and vaccines; and (4) product release assays for biologic drugs and vaccines. No other commercial use is allowed. “Commercial use” means any and all uses of this product by recipient for monetary or other consideration, including providing a service, information or data to unaffiliated third parties, and resale of this product for any use. Recipient has no right to propagate, modify, derivatize, genetically engineer or otherwise create variations of the cells or genes stably transfected within the cells. In addition, recipient must use luminescent assay reagents purchased from Promega for all luminescence-based assays using this product, or contact Promega to obtain a license for use of this product with reagents other than Promega’s. PROMEGA MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING AS TO MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE WITH REGARDS TO THIS PRODUCT. The terms of this agreement shall be governed under the laws of the State of Wisconsin, USA.

Product cannot be used for proficiency testing.

Specifications

You are viewing: J3322 Change Configuration

What's in the box?

Item Part # Size

Membrane TNFα Target Cells (CPM)

J332A 2 × 1ml

Certificate of Analysis

Search by lot number

Use Restrictions

Not For Medical Diagnostic Use.

Storage Conditions

XX

Please see the Protocol for detailed storage conditions.

Patents and Disclaimers

NOT FOR MEDICAL DIAGNOSTIC USE. FOR IN VITRO USE ONLY. BY USE OF THIS PRODUCT, RECIPIENT AGREES TO BE BOUND BY THE TERMS OF THIS LIMITED USE STATEMENT. If the recipient is not willing to accept the conditions of this limited use statement, and the product is unused, Promega will accept return of the unused product and provide the recipient with a full refund.

This product may not be further sold or transferred by the recipient and may be used only by the recipient, and then only for (1) research use; (2) discovery, development and monitoring of biologic drugs and vaccines; (3) quality assurance testing of biologic drugs and vaccines; and (4) product release assays for biologic drugs and vaccines. No other commercial use is allowed. “Commercial use” means any and all uses of this product by recipient for monetary or other consideration, including providing a service, information or data to unaffiliated third parties, and resale of this product for any use. Recipient has no right to modify, derivatize, genetically engineer or otherwise create variations of the cells or genes stably transfected within the cells except that recipient may propagate and store the cells for long-term use. In addition, recipient must use luminescent assay reagents purchased from Promega for all luminescence-based assays using this product, or contact Promega to obtain a license for use of this product with reagents other than Promega’s. PROMEGA MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING AS TO MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE WITH REGARDS TO THIS PRODUCT. The terms of this agreement shall be governed under the laws of the State of Wisconsin, USA.

Product cannot be used for proficiency testing.

Let's find the product that meets your needs.

Talk to a Scientist

Sylvia

Silvia

Italy