In Vitro Immunological Assay
In Vitro Immunological Assay - Related Videos
03:05
In Vitro Bacterial Transinfection of T Cells via Immunological Synapse Formation
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2025
Source: Cruz-Adalia, A., et al. T Cells Capture Bacteria by Transinfection from Dendritic Cells. J. Vis. Exp. (2016).This video demonstrates bacterial transinfection through antigen-specific T cell–dendritic cell interactions. Bacteria-infected dendritic cells presenting ovalbumin peptide are incubated with T cells, either directly or separated by a membrane. Direct contact allows immunological synapse formation, enabling bacterial transfer, while the membrane prevents interaction. Gentamicin...
09:55
In vitro Cell Migration and Invasion Assays
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Cited by 627 •
2014
Commonly used, highly accessible methods for examining cell migration and invasion in vitro are described. The first method is the cell wound closure assay that measures cell motility. The second method is the transwell migration and invasion assay that assesses the chemotactic and invasive capacity of cells.
03:31
Immunological Synapse Formation Between Helper T Cells and Antigen-Presenting Cells
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2025
This video demonstrates the in vitro study of immunological synapse formation between an antigen-presenting cell and helper T lymphocytes using a fluorescence microscope. T cell receptors of helper T lymphocytes interact with an antigen-MHC-II complex in antigen-presenting cells and form immunological synapses, followed by secretory vesicle movements toward the synapse, which is visualized by fluorescent microscopy.
01:23
Immunological Memory
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2024
Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases. What is Immunological Memory? Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature is...
08:56
Characterization of Thymic Settling Progenitors in the Mouse Embryo Using In Vivo and In Vitro Assays
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2015
This article describes in vivo and in vitro methodology to characterize the thymic settling progenitors by the analysis of the kinetics of generation, phenotype and numbers of their T cell progeny.
FAQs
The readout connects a defined immune interaction to a measurable result. Binding signals can indicate recognition between antibodies and antigens, while cellular readouts can reveal activation or cytokine release. Interpreting the signal requires relating it to the specific molecule, cell, or response being examined, allowing researchers to distinguish immune recognition from broader cellular activity.
Defined conditions isolate the interaction under investigation and reduce the influence of unrelated biological variables. This controlled design supports standardized comparisons between samples, treatments, or experimental groups. In immunology and infection research, consistent conditions make it easier to determine whether differences in binding, activation, or cytokine release reflect genuine changes in immune activity.
A biochemical readout is appropriate when the main question concerns interactions between immune molecules, such as antibody and antigen binding. A cellular readout becomes more useful when researchers need to examine immune-cell activation or cytokine release. The choice therefore depends on whether the study targets a molecular interaction or a response produced by immune cells.
A typical workflow begins by selecting the immune molecule, antigen, antibody, or cell response relevant to the research question. The components are then exposed to defined laboratory conditions, followed by detection of binding, activation, cytokine release, or another specified signal. Researchers compare the resulting measurements across samples to evaluate immune activity under controlled conditions.
Pathogen identification can rely on detecting immune recognition of pathogen-associated antigens or measuring immune responses directed toward them. An assay may therefore provide evidence that a sample contains a target recognized by an antibody or that immune cells respond to a relevant stimulus. This focused approach supports disease investigation by linking measurable immune signals with infection-related questions.
These assays can measure antibody responses, immune-cell activation, or cytokine release after exposure to a vaccine-related antigen or therapeutic condition. Comparing those readouts across experimental samples helps researchers assess whether an intervention produces the intended immune response or changes inflammation. The resulting data support standardized evaluation before relying exclusively on animal or clinical studies.
Inflammation research can use cellular and molecular readouts to examine immune activation and cytokine release under defined conditions. Measuring these responses helps investigators characterize how immune activity changes in relation to infection-related stimuli. Because the assay isolates selected interactions, it can support comparisons among samples and contribute to a clearer investigation of inflammatory mechanisms.