Fc Gamma Receptor
Fc Gamma Receptor - 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.
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.
03:03
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...
01:32
Evoked Gamma Oscillations for the Treatment of Alzheimer’s Disease
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2025
Begin with a patient diagnosed with Alzheimer’s disease, wearing a gamma therapy stimulation device.The device consists of an eye-set and headphones.Using the controller, activate the device to deliver auditory and visual stimulation.The visual component emits flickering light at a gamma frequency, while the auditory component produces synchronized sound pulses.Gamma oscillations are brain waves generated by synchronized neuronal firing, crucial for cognition and memory.In AD, these...
05:47
Intravital Visualization of Gamma Delta Intraepithelial Lymphocytes
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2025
This video demonstrates the visualization of γδ intraepithelial lymphocytes (IELs) in transgenic mice using confocal microscopy. The surgical procedure involves creating a perforation line and making a longitudinal incision to expose the intestinal mucosa and villi. The transgenic mice express reporter proteins exclusively in γδ IELs, allowing their tracking. Intravital imaging captures the dynamic movement of green fluorescence-labeled γδ IELs along the intestinal epithelial cell's basement...
FAQs
The key distinction lies in the signaling motifs associated with each receptor. Immunoreceptor tyrosine-based activation motifs promote cellular responses such as phagocytosis, cytokine production, and antibody-dependent cellular cytotoxicity, whereas immunoreceptor tyrosine-based inhibition motifs reduce activation. This balance allows IgG-coated targets to stimulate defense while limiting excessive inflammatory activity.
IgG coating concentrates antibody Fc regions on a target surface, enabling neighboring receptors to bind and cluster. That organization initiates intracellular signaling through the receptors’ activation or inhibition motifs. The resulting response depends on which signaling pathway predominates, linking the distribution of antibody on a target to the strength and direction of cellular activity.
FcγR expression across these immune-cell types connects antibody recognition with several forms of host defense. Macrophages and neutrophils can contribute to removal of IgG-coated material, natural killer cells support antibody-dependent cellular cytotoxicity, and dendritic cells participate in immune regulation. Together, these cell-specific activities influence inflammation and immune-complex clearance.
Studies can evaluate whether receptor engagement produces phagocytosis, cytokine production, antibody-dependent cellular cytotoxicity, or reduced cellular activation. These outcomes reveal whether activating or inhibitory signaling dominates and help connect receptor behavior with broader processes such as target elimination, inflammatory regulation, and immune-complex clearance.
In infection research, FcγRs help explain how IgG-coated targets are handled by immune cells. In autoimmune disease, the same receptor system is relevant because immune-complex clearance and inflammatory regulation can shape host responses. Examining both activating and inhibitory pathways therefore provides context for understanding protective defense alongside potentially harmful inflammation.
Therapeutic antibody studies must consider how antibody binding to FcγRs may influence downstream cellular behavior. Receptor engagement can promote target-cell elimination, cytokine production, or reduced activation, depending on the signaling balance. This makes FcγR biology relevant to antibody design and to cancer immunology, where cellular responses against targets are central.