Determination of the Relative Potency of an Anti-TNF Monoclonal Antibody (mAb) by Neutralizing TNF Using an <em>In Vitro </em>Bioanalytical Method

Lilia Tierrablanca-S&#225;nchez; V&#237;ctor P&#233;rez Medina Mart&#237;nez; Nancy D. Ram&#237;rez Iba&#241;ez; N&#233;stor O. P&#233;rez Ram&#237;rez; Francisco Luis Flores Ortiz; Emilio Medina-Rivero

doi:10.3791/55376

Determination of the Relative Potency of an Anti-TNF Monoclonal Antibody (mAb) by Neutralizing TN...

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Determination of the Relative Potency of an Anti-TNF Monoclonal Antibody (mAb) by Neutralizing TNF Using an In Vitro Bioanalytical Method

Determination of the Relative Potency of an Anti-TNF Monoclonal Antibody (mAb) by Neutralizing TNF Using an In Vitro Bioanalytical Method

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16:07 min

September 16, 2017

DOI: 10.3791/55376-v

Lilia Tierrablanca-Sánchez¹, Víctor Pérez Medina Martínez¹, Nancy D. Ramírez Ibañez¹, Néstor O. Pérez Ramírez¹, Francisco Luis Flores Ortiz¹, Emilio Medina-Rivero²

¹Research and Development,Probiomed, ²Bioprocess Research and Development Unit,Instituto Politecnico Nacional

Overview

This protocol outlines a method for assessing the relative potency of anti-TNF-alpha monoclonal antibodies using WEHI 164 cells. It provides a comparative analysis of the neutralization efficiency of a reference mAb against a sample mAb.

Key Study Components

Area of Science

Immunology
Cell Biology
Biotechnology

Background

Anti-TNF-alpha monoclonal antibodies are used to neutralize the effects of TNF-alpha.
WEHI 164 cells serve as a model for studying cytokine interactions.
Understanding neutralization efficiency is crucial for therapeutic applications.
Cells can be subjected to stress to evaluate their response to TNF-alpha.

Purpose of Study

To measure the relative potency of different anti-TNF-alpha mAbs.
To compare the neutralization efficiency of a reference mAb with a sample mAb.
To provide a detailed protocol for researchers in the field.

Methods Used

Cell culture of WEHI 164 cells.
Application of anti-TNF-alpha mAbs to the cultured cells.
Assessment of cell viability and apoptosis.
Comparison of neutralization potency between mAbs.

Main Results

Demonstrated differences in neutralization efficiency between mAbs.
Provided quantitative data on the anti-apoptotic activity of tested mAbs.
Established a reliable protocol for future studies.
Highlighted the importance of receptor interactions in TNF-alpha signaling.

Conclusions

The protocol is effective for comparing anti-TNF-alpha mAbs.
Understanding neutralization mechanisms can inform therapeutic strategies.
Further research is needed to explore additional mAb candidates.

Frequently Asked Questions

What is the significance of TNF-alpha in cell biology?

TNF-alpha is a cytokine involved in systemic inflammation and is a key player in immune responses.

How do anti-TNF-alpha mAbs work?

They bind to TNF-alpha, preventing it from interacting with its receptors, thereby inhibiting inflammatory responses.

What are WEHI 164 cells?

WEHI 164 cells are a murine cell line used for studying immune responses and cytokine interactions.

What factors can stress cells in this protocol?

Environmental factors such as starvation can be used to stress cells and evaluate their response to TNF-alpha.

Why is it important to compare mAbs?

Comparing mAbs helps identify the most effective therapeutic candidates for treating diseases associated with TNF-alpha.

A protocol for the determination of the relative anti-apoptotic activity of an anti-TNFα mAb using a neutralization mechanism with WEHI 164 cells is presented here. This protocol is useful for comparing the neutralization strength of different molecules with the same biological functionality.

The overall goal of this procedure is to measure the relative potency of anti-TNF-alpha molecules. In this example, we compare two anti-TNF-alpha monoclonal antibodies in order to determine the neutralization efficiency of one reference mAb versus a sample mAb under investigation. This tutorial shows detailed steps for the determination of the TNF-alpha neutralization potency, which are not included in the literature.

Cells can be stressed by different environmental factors, for instance, starvation. Each cell has different proteins on its surface called receptors. Some of them are specific for the cytokine TNF-alpha.

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