Viral Antigenic Studies
Viral Antigenic Studies - Related Videos
05:04
Viral Antigen Microarray Assay to Detect Antibody Isotypes in Serum Against Viral Antigen
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2025
In this video, we demonstrate the process for detecting antibody isotypes in multiple human serum samples using a microarray slide printed with antigenic subtypes of influenza virus strains.
02:50
Suppressing Hepatitis B Virus Replication Using Viral Antigen-Specific T Cells
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2025
The video demonstrates an assay using human induced pluripotent stem cell (iPSC)-derived CD8+ T cells to inhibit hepatitis B virus (HBV) replication in mice. These T cells, engineered with HBV-specific receptors, are transferred into transgenic mice. Replication-competent HBV genome plasmids are then injected directly into the liver, enabling viral DNA uptake. Once viral antigens are expressed and presented by hybrid MHC-I molecules, the engineered T cells recognize and bind to these complexes.
03:13
Immunostaining to Visualize Viral Antigen and Host Protein Colocalization in the Insect Gut
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2026
Source: Zhang, L., et al. Immunofluorescent Labeling of Plant Virus and Insect Vector Proteins in Hemipteran Guts. J. Vis. Exp. (2021)The video demonstrates the preparation of gut tissue from a plant virus–infected insect vector for fluorescence imaging. Fixed guts were washed, permeabilized, and incubated with two fluorescent antibodies in a blocking solution—one targeting a viral antigen in vesicles, the other a vesicle-associated membrane protein. The tissue was counterstained for actin...
06:57
Development of an Antigen-driven Colitis Model to Study Presentation of Antigens by Antigen Presenting Cells to T Cells
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Cited by 9 •
2016
In this antigen-driven colitis model, OT-II CD4+ T cells expressing a red fluorescent protein were adoptively transferred into RAG-/- mice that express a green fluorescent protein in mononuclear phagocytes (MPs). The hosts were challenged with Escherichia coli (E.coli) expressing the ovalbumin protein (OVA) fused to a cyan fluorescent protein (CFP).
05:22
Ex vivo Culture of Human Placental Explants for the Study of Viral Transmission Across the Maternal-Fetal Interface
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2025
This protocol describes the preparation of human placental tissue explants cultured at an air-liquid interface for the study of viral infections.
FAQs
Changes in antigenic sites can modify how antibodies bind to viral envelope or capsid proteins. Some alterations may reduce recognition by antibodies generated against an earlier strain, creating an antigenic difference between viruses. Comparing these changes helps determine whether strains remain immunologically similar or show evidence of immune escape that could affect infection patterns and protection.
These methods assess related but distinct aspects of antibody-virus interaction. Neutralization assays measure whether antibodies can block viral activity, hemagglutination inhibition examines antibody effects on a hemagglutination-related property, and serological profiling compares binding and cross-reactivity patterns. Together, their results help characterize antigenic relationships more comprehensively than relying on a single measurement.
Cross-reactivity indicates whether antibodies directed against one viral strain also recognize another. Stronger cross-reactivity suggests greater antigenic similarity, whereas limited cross-reactivity can signal meaningful differences in antigenic sites. This comparison helps researchers interpret how prior infection or vaccination may relate to recognition of other strains and identify patterns consistent with changing immune susceptibility.
Researchers compare antibody binding or functional responses across viral strains using neutralization assays, hemagglutination inhibition, or serological profiling. The resulting pattern shows which strains are recognized similarly and which differ antigenically. Examining these relationships allows scientists to organize strain comparisons around immune recognition rather than relying only on viral sequence or other characteristics not described by the antigenic measurements.
Antigenic comparisons can reveal relationships among circulating viral strains and identify changes in immune recognition over time. Surveillance teams can use these patterns to interpret whether newly observed strains resemble previously characterized viruses or differ in ways relevant to immune escape. This information supports broader analysis of infection patterns and helps connect viral evolution with host immunity.
Antigenic data help assess whether vaccine-induced antibodies recognize circulating viral strains and how closely those strains relate to existing vaccine targets. When comparisons show altered antigenic relationships or reduced cross-reactivity, the findings can support consideration of vaccine strain selection or updating. The approach therefore links laboratory measurements of immune recognition with evaluation of protection.