Fc Receptor Engagement
Fc Receptor Engagement - Related Videos
03:32
An In Vitro Artificial Activation Assay for Studying Fc Receptor Activation by Antibodies
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2025
This video demonstrates FcγRIIIa-driven events initiated by therapeutic antibodies in human natural killer cells. The artificial stimulation platform facilitates the exploration of downstream effector functions, encompassing cytoskeletal rearrangement, degranulation, chemokine/cytokine production, and signaling pathways mediated by the FcγRIIIa and Fc portions of antibodies involved in binding.
03:03
Measuring the Activation of Fc-Mediated Effector Functions by HA Antibodies
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2025
This video demonstrates an assay measuring the antibody-mediated activation of T cell effector functions. Adding an influenza virus hemagglutinin (HA)-specific monoclonal antibody to transfected mammalian cells expressing HA results in the formation of immune complexes with HA. Upon introducing engineered T cells expressing Fc receptors and a luciferase reporter, the T cells are activated by the antibody-HA complexes, and this activation is detected by adding a luciferase substrate and...
04:47
A Method to Assess Fc-mediated Effector Functions Induced by Influenza Hemagglutinin Specific Antibodies
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Cited by 6 •
2018
We describe a method to measure the activation of Fc-mediated effector functions by antibodies that target the influenza virus hemagglutinin. This assay can also be adapted to assess the ability of monoclonal antibodies or polyclonal sera targeting other viral surface glycoproteins to induce Fc-mediated immunity.
03:01
Evaluation of Immunomodulatory Activity of a Virally Encoded Bispecific T-Cell Engager
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2026
Source: Heidbuechel, J. P., et al. Paramyxoviruses for Tumor-targeted Immunomodulation: Design and Evaluation Ex Vivo. J. Vis. Exp. (2019).This video demonstrates a cell-based assay to evaluate the target-specific immunomodulatory activity of a virally encoded bispecific T-cell engager (BTE). The BTE links tumor cells expressing a target receptor with T cells, triggering tumor lysis and enzyme release. A colorimetric readout, based on substrate conversion, indicates T-cell activation. Higher...
10:33
Isolation and Characterization Of Chimeric Human Fc-expressing Proteins Using Protein A Membrane Adsorbers And A Streamlined Workflow
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Cited by 3 •
2014
Compared with traditional affinity chromatography using protein A agarose bead-packed columns, protein A membrane adsorbers can significantly speed laboratory-scale isolation of antibodies and other Fc fragment-expressing proteins. Appropriate analysis and quantification methods can further accelerate protein processing, allowing isolation/characterization to be completed in one workday, instead of 20+ work hours.
FAQs
Antibody isotype and Fc receptor class help determine which cellular response follows engagement. In the same antibody-coated target context, different receptor combinations can favor phagocytosis, antibody-dependent cellular cytotoxicity, cytokine release, or other effects. This dependence is important when interpreting immune activity, because receptor engagement does not produce a single universal outcome across antibodies or immune cells.
Clustering of Fc receptors helps convert antibody binding into an intracellular signal. When Fc regions on a coated microbe or infected cell bring receptors together, signaling pathways can activate cellular effector functions rather than leaving antibody attachment as a passive event. This mechanism explains how antibody organization on a target can influence the resulting cellular response.
The consequences extend beyond direct pathogen clearance because receptor-triggered responses can include cytokine release and other immune activities. Depending on the antibody isotype, receptor class, and responding cell, engagement may contribute to inflammation as well as antimicrobial defense. Studying these outcomes helps connect antibody activity with broader disease processes rather than viewing antibodies only as recognition molecules.
Measurements can indicate whether antibodies coating a microbe or infected cell are likely to recruit cellular effector functions. Researchers can compare engagement associated with phagocytosis, antibody-dependent cellular cytotoxicity, cytokine release, or other responses. These results provide a functional perspective on antibody activity that complements assessment of antigen recognition alone.
In vaccine research, Fc receptor engagement helps assess whether vaccine-induced antibodies can connect recognition of a microbial target with useful cellular responses. Evaluating activities such as phagocytosis, antibody-dependent cellular cytotoxicity, or cytokine release can therefore add functional context to antibody measurements. This approach supports investigation of how vaccination may contribute to pathogen clearance and immune protection.
Therapeutic antibody development can use Fc receptor engagement to examine whether an antibody elicits the intended cellular effector function after binding its target. Because outcomes depend on antibody isotype and receptor class, this analysis helps relate antibody design to activities such as cytotoxicity, phagocytosis, or cytokine release. It also provides a framework for studying how therapeutic antibodies may influence inflammation.
During infection, examining this interaction reveals how antibodies on microbes or infected cells recruit immune-cell functions and how those responses relate to pathogen clearance. Comparing engagement and downstream effects can also help investigate immune evasion, in which pathogens may limit the effectiveness of antibody-driven cellular responses. These studies connect molecular antibody activity with infection outcomes.