Igg-fc Fragment Antibodies
Igg-fc Fragment Antibodies - Related Videos
10:32
Generation of Recombinant Human IgG Monoclonal Antibodies from Immortalized Sorted B Cells
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Cited by 7 •
2015
Synthesis of human monoclonal antibodies is the first step in studies aimed at unraveling the pathophysiological mechanisms of auto-antibody-mediated immune responses. We have developed a protocol to generate recombinant human immunoglobulin G (IgG) monoclonal antibodies from blood sorted B cells, including B-cell isolation, antibody cloning and in vitro synthesis.
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.
03:32
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.
04:43
COVID-19 Seroprevalence Test for IgG Antibody Levels Among Healthy Donors Across Different Pandemic Phases in Jeddah
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2025
This study assessed COVID-19 seroprevalence in Jeddah, Saudi Arabia, among healthy blood donors across pre-lockdown, during-lockdown, and post-lockdown periods. Of 3,825 samples, 4.5% tested positive for IgG antibodies. Seroprevalence increased significantly post-lockdown, highlighting the role of asymptomatic transmission and the effectiveness of initial restrictions.
FAQs
Their binding is directed toward epitopes in the constant Fc region, so recognition does not depend on the antigen-binding Fab region of IgG. This allows the reagent to detect IgG across samples while retaining information about how much antibody is present and where it is distributed. That distinction is useful when the research question concerns antibody abundance rather than antigen specificity alone.
An Fc-specific reagent can bind IgG that has already participated in an assay, allowing the IgG to be detected without targeting its Fab-mediated antigen-binding site. This arrangement supports indirect measurement in enzyme-linked immunosorbent assays, immunoblotting, and immunofluorescence. In infection studies, it can therefore help reveal pathogen-specific antibody responses through the IgG associated with the experimental sample.
Fc targeting focuses on the shared constant portion of IgG, whereas Fab targeting would focus on the variable antigen-binding portion. Consequently, Fc-directed reagents are suited to detecting or capturing IgG as an antibody class or population, while Fab-directed recognition would emphasize antigen-binding features. This distinction helps investigators match reagent specificity to measurements of abundance, distribution, or immune response.
Because the Fc domain remains an identifiable part of IgG, Fc-specific antibodies can recognize IgG within antibody-containing complexes. Their use can help detect or capture those complexes in experimental assays without requiring recognition of the antigen-binding Fab region. This provides a way to examine the presence and distribution of IgG-associated material when studying humoral immune responses.
In an enzyme-linked immunosorbent assay, an Fc-specific reagent functions as a secondary antibody after IgG is present in the experimental assay. Its Fc binding supports detection of that IgG, enabling assessment of antibody abundance in the sample. When the IgG is pathogen-specific, the resulting measurement can contribute to characterization of an infection-related humoral immune response.
Researchers can choose Fc-specific detection when they need to identify IgG in immunoblotting or immunofluorescence while focusing on antibody distribution rather than Fab-region recognition. The reagent supports visualization or detection of IgG associated with the experimental material. This is relevant for comparing antibody presence across samples and examining how immune responses are represented in assay results.
Selective purification uses Fc recognition to enrich or isolate IgG from a sample based on its constant region. The resulting material can then support analysis of antibody abundance, distribution, or participation in antibody-containing complexes. In immunology and infection research, this approach is valuable when investigators need to examine IgG populations rather than only detect them within a mixed experimental sample.
Fc-directed antibodies provide a consistent way to examine IgG across diagnostic or experimental samples. Their applications include measuring pathogen-specific antibodies, characterizing humoral immune responses, analyzing antibody-containing complexes, and supporting detection or purification. Together, these uses connect assay-level observations with broader questions about how antibody abundance and distribution reflect immune activity during infection-related investigations.