Host Cell Infection
Host Cell Infection - Related Videos
04:15
Extracting Host Cell Lysate from Infected Host Cells Cultured in a Permeable Membrane System
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2025
This video demonstrates a permeable membrane insert system to investigate the impact of bacterial toxins on host cells in a controlled and isolated manner. This approach allows for the selective exposure of the cells to the toxins while maintaining a physical separation that mimics the natural host-pathogen interaction.
03:41
Isolation of Intracellular Pathogenic Bacteria from Infected Host Cells
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2026
Source: Sigal, N., et al. RNA Purification from Intracellularly Grown Listeria monocytogenes in Macrophage Cells. J. Vis. Exp. (2016).This video demonstrates the isolation of internalized pathogenic bacteria from infected bone marrow-derived macrophages (BMDMs). Bacteria are allowed to attach to host cells, and unattached bacteria are washed away. After internalization, an antibiotic is added to eliminate non-internalized bacteria. The host cells are lysed, centrifuged, and the supernatant is...
09:35
Using Click Chemistry to Measure the Effect of Viral Infection on Host-Cell RNA Synthesis
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Cited by 15 •
2013
This method describes the use of click chemistry to measure changes in host cell transcription after infection with the Rift Valley fever virus (RVFV) strain MP-12. Results can be visualized qualitatively via fluorescence microscopy or obtained quantitatively through flow cytometry. This method is adaptable for use with other viruses.
15:29
Microscopy-based Assays for High-throughput Screening of Host Factors Involved in Brucella Infection of Hela Cells
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Cited by 6 •
2016
Two assays for microscopy-based high-throughput screening of host factors involved in Brucella infection are described. The entry assay detects host factors required for Brucella entry and the endpoint assay those required for intracellular replication. While applicable for alternative approaches, siRNA screening in HeLa cells is used to illustrate the protocols.
05:28
A Bacterial Infection Assay for Studying Anaerobic Bacteria-Host Cell Interactions
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2025
This video demonstrates a technique for assessing the ability of Porphyromonas gingivalis, an anaerobic pathogenic bacterium, to adhere to and invade human umbilical vein endothelial cells (HUVECs). After infecting the host cells with the bacteria, the host cells are lysed to release both adhered and internalized bacteria. When the lysate is plated in an appropriate medium, the presence of colonies indicates successful bacteria-host cell interactions.
FAQs
Susceptibility depends in part on whether microbial surface molecules can bind receptors on a host cell. This interaction provides the initiating contact needed for entry and helps determine which cells can be infected. Examining receptor engagement therefore connects pathogen surface properties with cellular targeting, infection distribution, and the host tissues that may experience subsequent damage.
After attachment, pathogens may enter through membrane fusion, endocytosis, or other uptake pathways. These routes differ in how the pathogen crosses the cell boundary and gains access to the intracellular environment. Distinguishing them helps explain why entry is a critical stage of Host Cell Infection and identifies mechanisms that could be examined when seeking ways to limit infection.
Once inside a cell, a pathogen may use cellular resources to replicate or may evade cellular defenses. These activities influence how much infection develops and how strongly the host responds. Studying both processes is important because successful intracellular survival can support pathogen persistence, whereas effective immune recognition may restrict infection or contribute to tissue damage.
A useful investigation can follow the sequence from microbial attachment to host-cell receptors, through cellular entry, to intracellular replication or defense evasion. It should also consider the resulting innate and adaptive immune responses. Organizing observations around these stages connects molecular events with broader outcomes, including pathogen persistence, immune recognition, and tissue injury.
Research can identify the pathogen features and infection stages that are most relevant to immune recognition. Understanding how host cells detect infection and activate innate and adaptive responses provides scientific context for vaccine development. These findings can help relate pathogen exposure to protective immunity, while also clarifying mechanisms that may influence disease severity.
Mapping receptor binding, cellular entry, intracellular replication, and immune evasion reveals stages at which infection might be limited. Such mechanistic knowledge supports antimicrobial discovery and strategies intended to reduce infection. It also helps researchers connect cellular events with tissue damage and patient outcomes, providing a basis for evaluating approaches that may improve disease control.