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LAG-3/MHCII Blockade Bioassay, Cell Propagation Model


Allows Propagation and Banking of LAG-3/MHCII Blockade Bioassay

  • Prequalified according to ICH guidelines
  • Mechanism-of-action-based assay
  • No primary cell culture required


Catalog number selected: JA1112

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LAG-3/MHCII Blockade Bioassay, Cell Propagation Model
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Measure the ability of biologics to block immune checkpoint signals

The LAG-3/MHCII Blockade Bioassay is a bioluminescent cell-based assay that measures potency and stability of antibodies and other biologics designed to block the interaction of LAG-3 with its best characterized ligand, major histocompatibility complex II (MHCII). LAG-3, also known as CD223, is an immune checkpoint receptor expressed on activated CD4+ and CD8+ T cells and natural killer (NK) cells. LAG-3 plays a critical role in regulating immune responses to tumor antigens and autoantigens. Engagement of LAG-3 by MHCII inhibits TCR signaling, cytokine production and proliferation of activated T cells. Therapeutic antibodies designed to block the LAG-3/MHCII interaction show promising results in clinical trials for the treatment of a variety of cancers.

The LAG-3/MHCII Blockade Bioassay, Propagation Model (Cat.# JA1112) is a bioluminescent cell-based assay that measures the potency and stability of antibodies and biologics targeting LAG-3/MHCII and overcomes the limitations of existing assays. The LAG-3 Effector Cells and MHCII APC Cells are provided in a Cell Propagation Model (CPM) format, which includes cryopreserved cells that can be thawed, propagated and banked for long-term use (also offered in a thaw-and-use format; Cat.# JA1111, JA1115). 


What's in the box?

Item Part # SizeAvailable Separately

LAG-3 Effector Cells (CPM)

J245A 2 × 1ml

TCR Activating Antigen Stock Solution

K120B 1 × 500μl View Product


J246A 2 × 1ml

Certificate of Analysis

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Use Restrictions

Not For Medical Diagnostic Use.

Storage Conditions

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 Bio-Glo™ Luciferase Assay System purchased from Promega Corporation for all luminescence 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.

U.S. Pat. No. 8,008,006 and European Pat. No. 1341808.

Licensed from Lonza Cologne GmbH under U.S. Pat. Nos. 7,700,357, 8,192,990 and 8,003,389, European Pat. Nos. 1297119, 1522587, 1607484 and 1741778 and other pending and issued patents.

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