Coronavirus Pseudovirus
Coronavirus Pseudovirus - Related Videos
04:56
Antibody-Mediated Neutralization of Coronavirus Spike Protein-Expressing Pseudoviruses Using Patient Serum
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2026
Source: Jamieson, T. R., et al. Detection of SARS-CoV-2 Neutralizing Antibodies using High-Throughput Fluorescent Imaging of Pseudovirus Infection. J. Vis. Exp. (2021)This video demonstrates the antibody-mediated neutralization of pseudoviruses carrying coronavirus spike proteins using patient serum, studied through high-throughput fluorescent imaging of infected epithelial cell monolayers.
02:45
Production and Collection of Pseudovirus Particles Using Mammalian Cell Culture
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2026
Source: Jamieson, T. R., et al. Detection of SARS-CoV-2 Neutralizing Antibodies using High-Throughput Fluorescent Imaging of Pseudovirus Infection. J. Vis. Exp. (2021)This video demonstrates the procedure for infecting mammalian cells with green fluorescent protein (GFP)-encoding pseudovirus, monitoring viral replication and spread by fluorescence microscopy, and collecting virus-containing supernatant for downstream applications.
03:25
Quantification of Pseudovirus Particles by Plaque Assay
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2026
Source: Jamieson, T. R., et al., Detection of SARS-CoV-2 Neutralizing Antibodies using High-Throughput Fluorescent Imaging of Pseudovirus Infection. J. Vis. Exp. (2021)This video describes the virus plaque assay using coronavirus pseudovirus particles. The diluted pseudovirus is added to a monolayer of mammalian cells, followed by incubation with a methylcellulose overlay. Plaques formed by infected cells are counted visually to determine the infectious virus titer.
02:01
Assessing Pseudovirus Infection Using Luciferase Reporter Assay
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2026
Source: Chang, X., et al. Preparation of Pseudo-Typed H5 Avian Influenza Viruses with Calcium Phosphate Transfection Method and Measurement of Antibody Neutralizing Activity. J. Vis. Exp. (2021).This video demonstrates a luciferase-based assay to quantify pseudovirus infection in epithelial cells. The pseudovirus encodes the luciferase gene, which is expressed in infected cells. After washing, and cells are incubated with lysis buffer at an ultra-low temperature, and then thawed to induce lysis.
02:22
Production of Pseudovirus Using Plasmid Transfection in Human Cells
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2026
Source: Chang, X., et al. Preparation of Pseudo-Typed H5 Avian Influenza Viruses with Calcium Phosphate Transfection Method and Measurement of Antibody Neutralizing Activity. J. Vis. Exp. (2021)This video demonstrates the production of influenza pseudoviruses in human cells using calcium phosphate-mediated plasmid transfection, enabling safe generation of single-cycle viral particles for downstream applications such as antibody neutralization assays under biosafety level 2 conditions.
FAQs
The displayed surface protein mediates the initial interaction with susceptible cells, allowing the particle to model coronavirus attachment and entry. Because the surrogate core carries a reporter rather than a complete replication program, the measured signal reflects successful entry-related events instead of production of infectious progeny. This makes receptor-dependent cell entry easier to examine under controlled biological conditions.
The surrogate core provides the structural vehicle for presenting coronavirus proteins and delivering the reporter system, while avoiding the full replication behavior of coronavirus. Lentivirus- or vesicular stomatitis virus-derived cores can therefore support entry studies without generating infectious coronavirus progeny. This separation lets investigators focus on surface-protein function and entry-associated responses rather than later stages of viral replication.
Results can vary with the coronavirus surface-protein variant, the susceptibility of the tested cells, and the presence of antibodies or antiviral compounds. Host factors that influence attachment or entry may increase or reduce the reporter signal, while sequence differences among variants can alter these interactions. Comparing conditions helps identify determinants of cell entry and susceptibility.
A reporter system converts successful delivery by the pseudovirus into a measurable signal. Stronger or weaker signals can be compared across cell types, coronavirus variants, antibody conditions, or treatment conditions to estimate differences in entry-related activity. The readout does not indicate production of infectious progeny, so interpretation should remain focused on attachment and entry rather than complete viral replication.
A typical study selects a coronavirus surface protein, incorporates it onto a replication-defective surrogate particle containing a reporter, and exposes susceptible cells to the engineered particles. Researchers then measure the resulting reporter signal and compare it across experimental conditions. This workflow supports tests of receptor-dependent entry, antibody inhibition, antiviral activity, or host-factor effects without requiring replication-competent coronavirus.
Researchers may choose coronavirus pseudovirus when they need to examine surface-protein-mediated entry, compare variants, or evaluate antibodies and antiviral candidates in a safer experimental format. Its replication-defective design avoids production of infectious progeny while preserving a measurable entry-related readout. The approach is therefore useful when the research question concerns early infection steps rather than the full viral life cycle.
In biology, coronavirus pseudovirus assays can support receptor-binding and cell-entry studies, investigation of host factors, and measurement of antibody-mediated neutralization. They also help compare viral variants and assess vaccine- or therapeutic-related activity through differences in reporter signal. These applications connect molecular interactions at the cell surface with experimentally measurable changes in coronavirus entry behavior.