FcγRIIa-H ADCP Bioassay

Measure Potency and Stability of Biologics that Bind and Activate FcyRIIa-H

Antibody-dependent cell-mediated phagocytosis (ADCP) is an important mechanism of action (MOA) of therapeutic antibodies. In vivo, ADCP can be mediated by monocytes, macrophages, neutrophils and dendritic cells via FcγRIIa, FcγRI and FcγRIIIa. While all three receptors can participate in ADCP, FcγRIIa is believed to be the predominant Fcγ receptor involved in this process.

The FcγRIIa-H ADCP Reporter Bioassay is a biologically relevant MOA-based assay that can be used to measure the potency and stability of antibodies and other biologics that specifically bind and activate FcγRIIa. The assay consists of Jurkat cells stably expressing human FcγRIIa-H (the high-affinity H131 variant) and NFAT-induced luciferase.

The bioassay workflow is simple and robust, compatible with 96-well and 384-well plate formats, and unlike traditional primary cell-based assays, amenable for use in quality-controlled drug development settings.

The Workflow

Standard bioassay workflow with cultured cells

Improved bioassay workflow with thaw-and-use cells

Standardized Reagents Improve Results

Thaw-and-use cell format provides significant time and labor savings over traditional methods while reducing variability.
Kit includes all of the required reagents in standardized formats.
Easily amenable to high-throughput workflows.

The Assay Principle

The Fc Effector Reporter Bioassays use an alternative readout from traditional primary cell based assays: the FcγR and NFAT-mediated activation of luciferase activity in the effector cells. Primary cells are replaced with a Jurkat cell line stably expressing human FcγRIIa H-131and NFAT-induced luciferase.

Luminescent Assay Monitors Fc Effector Activity

Following engagement with the Fc region of a relevant antibody bound to a Target Cell, ADCP Bioassay Effector Cells expressing FcγRIIa-H131 with transduce intracellular signals resulting in NFAT-RE-mediated luciferase activity that can be easily quantified.

Assay Performance Data

Accuracy and Precision are critical to bioassays and the development of new biologics. The ADCP Reporter Bioassays are both accurate and precise and have been prequalified according to ICH guidelines and show the precision, accuracy and linearity required for routine use in potency and stability studies. Accuracy is a measure of how close results are to a target or reference value. Precision is a measure of repeatability.

Accuracy: Measure of ability to replicate 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.

ADCP Reporter Bioassay Shows Precision, Accuracy and Linearity

Raji Target Cells

Parameter	Results
Accuracy	% Expected Relative Potency	% Recovery
	50	99.1
	75	102.7
	150	105.0
	200	99.1
Repeatability (% CV)	100% (Reference)	6.5
Intermediate Precision (% CV)		3.5
Linearity (r²)		0.997 (50–200% range)
Linearity (y = mx + b)		y = 0.997x + 1.95
A 50–200% theoretical relative potency series of the ADCP Control Ab, anti-CD20 (IgG1), was analyzed in triplicate in three independent experiments performed on three days. Luciferase activity was quantified using the Bio-Glo™ Reagent. Data were analyzed and relative potencies calculated after parallelism determination using JMP® software. Data were generated using thaw-and-use cells.

The ADCP Bioassay reflects the MOA and specificity of antibodies designed to bind and activate FcγRIIa-H

13449MA-W-a — Increasing concentrations of trastuzumab (anti-HER2) or rituximab (anti-CD20) were incubated with SKBR3 (HER2+) target cells and FcγRIIa-H Effector Cells.

13449MA-W-b — Increasing concentrations of trastuzumab (anti-HER2) or rituximab (anti-CD20) were incubated with Raji (CD20+) target cells and FcγRIIa-H Effector Cells.

13449MA-W-c — Increasing concentrations of rituximab were incubated with Raji target cells and NFAT-RE effector cells either with or without FcγRIIa-H expression. Bio-Glo™ Reagent was added, and luminescence was measured. Data were fitted to a 4PL curve using GraphPad Prism® software.

Product Format

Complete Kit

Includes FcγRIIa-H Effector Cells, Target Cells (Raji), Control Antibody, Cell Culture Medium and Assay Reagents.
Recommended for use as a starter kit.

Core Kit

Includes FcγRIIa-H Effector Cells, Cell Culture Medium and Assay Reagents.
Recommended for routine use with customer-defined antibody and target cells.
Available in 1X and 5X sizes.

Cell Propagation Model

Includes FcγRIIa-H Effector Cells (CPM); these are cryopreserved cells that can be thawed, propagated and banked for long-term use.
Use to measure the potency and stability of antibodies and other biologics with Fc domains that specifically bind and activate FcγRIIa.

Protocols

Complete Protocol

Fc(gamma)RIIa-H ADCP Reporter Bioassay, Complete Kit PDF (1362 KB) – English

Fc(gamma)RIIa-H ADCP Reporter Bioassay, Core Kit Technical ManualPDF (1358 KB) – English

FcγRIIa-H ADCP Bioassay Effector Cells, Propagation Model Technical ManualPDF (1106 KB) – English

What's in the box?

Item	Part #	Size
FcγRIIa-H Effector Cells	G988A	1 × 0.62ml
Target Cells (Raji)	G960A	1 × 0.55ml
ADCP Control Ab, Anti-CD20	G989A	1 × 2.5μg
Low IgG Serum	G711A	1 × 4ml
RPMI 1640 Medium	G708A	1 × 36ml
Bio-Glo™ Luciferase Assay Buffer	G719A	1 × 10ml
Bio-Glo™ Luciferase Assay Substrate	G720A	1 × 1 vial

SDS

Search for SDS

Certificate of Analysis

Search by lot number

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 propagate, modify, derivatize, genetically engineer or otherwise create variations of the cells or genes stably transfected within the cells. 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.

U.S. Pat. No. 10,077,244 and other patents.

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.

Product cannot be used for proficiency testing.

What's in the box?

Item	Part #	Size
FcγRIIa-H Effector Cells	G988A	1 × 0.62ml
Low IgG Serum	G711A	1 × 4ml
RPMI 1640 Medium	G708A	1 × 36ml
Bio-Glo™ Luciferase Assay Buffer	G719A	1 × 10ml
Bio-Glo™ Luciferase Assay Substrate	G720A	1 × 1 vial

SDS

Search for SDS

Certificate of Analysis

Search by lot number

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 propagate, modify, derivatize, genetically engineer or otherwise create variations of the cells or genes stably transfected within the cells. 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.

U.S. Pat. No. 10,077,244 and other patents.

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.

Product cannot be used for proficiency testing.

What's in the box?

Item	Part #	Size
FcγRIIa-H Effector Cells	G988A	5 × 0.62ml
Low IgG Serum	G711A	5 × 4ml
RPMI 1640 Medium	G708A	5 × 36ml
Bio-Glo™ Luciferase Assay Buffer	G719A	5 × 10ml
Bio-Glo™ Luciferase Assay Substrate	G720A	5 × 1 vial

SDS

Search for SDS

Certificate of Analysis

Search by lot number

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 propagate, modify, derivatize, genetically engineer or otherwise create variations of the cells or genes stably transfected within the cells. 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.

U.S. Pat. No. 10,077,244 and other patents.

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.

Product cannot be used for proficiency testing.

What's in the box?

Item	Part #	Size
FcγRIIa-H Effector Cells (CPM)	G987A	2 × 1ml

SDS

Search for SDS

Certificate of Analysis

Search by lot number

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.

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.

Product cannot be used for proficiency testing.

FcγRIIa-H ADCP Bioassay

Measure Potency and Stability of Biologics that Bind and Activate ADCP through FcγRIIa-H