Cytotoxic Molecule Release
Cytotoxic Molecule Release - Related Videos
11:48
Assay for Cell Death: Chromium Release Assay of Cytotoxic Ability
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2023
Source: Frances V. Sjaastad1,2, Whitney Swanson2,3, and Thomas S. Griffith1,2,3,4 1 Microbiology, Immunology, and Cancer Biology Graduate Program, University of Minnesota, Minneapolis, MN 55455 2 Center for Immunology, University of Minnesota, Minneapolis, MN 55455 3 Department of Urology, University of Minnesota, Minneapolis, MN 55455 4 Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455 One of the main functions of the cells of the immune system is to remove target cells...
03:50
A Technique to Generate a Novel Delivery Platform for a Delayed Burst Release of Molecules
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2025
This video demonstrates a method for the generation of a polymer bubble or polybubble-based novel platform that enables delayed burst release. Polyester-based polymers are used to form the polybubbles with core-shell structure, and small molecules and antigens can be used as cargo.
11:31
Determining Optimal Cytotoxic Activity of Human Her2neu Specific CD8 T cells by Comparing the Cr51 Release Assay to the xCELLigence System
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Cited by 37 •
2012
The chromium release assay, a common assay for detecting cytotoxic T cell activity, has several limitations. Using antigen-specific CD8 T cells and the human breast cancer tumor line, SKBR3, in the present article, an impedance-based approach was examined for the capability of detecting cell killing.
02:55
An In Vitro Assay for Evaluating Natural Killer Cell Cytotoxicity against Cancer Cells
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2025
This video demonstrates performing a lactate dehydrogenase release assay to determine the cytotoxicity of natural killer (NK) cells against the target cancer cells. The assay quantifies the release of the cytoplasmic lactate dehydrogenase enzyme from cancer cells by measuring the absorbance of the red-colored product formed.
02:58
Evaluating Cytotoxicity and Membrane Integrity in Lung Slices via Lactate Dehydrogenase Assay
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2025
This video demonstrates the lactate dehydrogenase, LDH assay to measure the cytotoxic effect of a test substance and its effect on the membrane integrity in human precision-cut lung slices. The assay provides a quantitative measure of cell death or damage in the sample.
FAQs
The immunological synapse organizes contact between a natural killer cell or cytotoxic T lymphocyte and its target before secretion occurs. This focused interaction enables directed degranulation, concentrating cytotoxic molecules at the target-cell interface rather than releasing them indiscriminately. Such spatial control supports efficient elimination of infected or abnormal cells while contributing to immune-cell functional assessment.
Perforin and granzymes act in a coordinated sequence. Perforin helps create pores in the target-cell membrane, providing a route for granzymes to act inside the cell. Granzymes then activate programmed cell death, so membrane disruption and intracellular death signaling work together rather than representing separate killing mechanisms.
Directed degranulation aligns the discharge of cytotoxic granules with the previously formed target-cell contact site. This organization links immune recognition to the delivery of perforin and granzymes, supporting a controlled response against the selected cell. The mechanism is especially relevant when immune cells must remove infected or damaged targets without broadly affecting neighboring cells.
By eliminating infected host cells, cytotoxic molecule release can interrupt cellular environments that support viral or intracellular pathogen replication. Natural killer cells and cytotoxic T lymphocytes therefore contribute to limiting pathogen spread through targeted cell removal. The outcome depends on the immune response identifying affected cells and executing the coordinated death-inducing mechanism.
Measurements of cytotoxic molecule release provide an indication of whether relevant immune cells can execute their killing response. Researchers can use this functional information to investigate how effectively cells respond during infection or whether cytotoxic activity is impaired. The readout therefore adds information about immune performance beyond simply identifying the presence of immune cells.
Immunodeficiency research can examine cytotoxic molecule release to determine whether defects affect the immune system’s ability to eliminate infected or abnormal cells. Reduced or altered release may help investigators characterize impaired immune-cell function and its consequences for pathogen control. This makes the process a useful functional focus when studying deficiencies in cellular immune responses.
Researchers can measure cytotoxic molecule release when evaluating immunotherapies designed to enhance or control cytotoxic immune responses. Changes in release can indicate whether an intervention influences the functional activity of natural killer cells or cytotoxic T lymphocytes. This helps connect treatment effects with the immune mechanisms responsible for removing targeted cells.