Cytotoxic Cd8 T Cells
Cytotoxic Cd8 T Cells - Related Videos
05:04
An In Vitro Assay for Studying the Cytotoxicity of Pre-Activated CD8+ T Cells against Cancer Cells
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2025
This video showcases an apoptosis assay in cancer cells induced by pre-activated effector T cells. By co-culturing these cells with cancer cells marked with fluorescent nuclei, a caspase-cleavable fluorogenic substrate is added. Apoptotic cancer cells will display a different color in their nuclei, leading to dual fluorescence. This dual fluorescence is indicative of cancer cells undergoing apoptosis.
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.
06:20
An Assay for Cell Cycle Analysis of Antigen-Specific CD8+ T Cells
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2025
This video demonstrates an assay to analyze antigen-specific CD8+ T cells in different cell cycle stages. Fluorescently-labeled viable cells are selected using flow cytometry, and the cells in the different cell cycle stages are identified by their DNA content using antibodies against cell proliferation-associated nuclear protein and a nucleic acid stain.
05:41
Nanoparticle-Based Enrichment and Expansion of Antigen-Specific CD8+ T Cells
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2025
This video describes a protocol for isolating rare-antigen-specific CD8+ T cells using magnetic nanoparticle-based artificial antigen-presenting cells (aAPCs) functionalized with antigenic peptide-loaded MHC-Igs and anti-CD28 antibodies. Interaction of the aAPCs with CD8+ T cells specifically expressing the antigenic peptide-targeting T cell receptors, followed by their expansion in vitro, results in the enrichment and expansion of this CD8+ T cell population.
03:50
An Ex Vivo Technique to Induce Neuronal Death via Oligodendrocyte-Specific CD8+ T Cells
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2025
This video demonstrates an ex vivo technique to induce brain cell death mediated through cytotoxic CD8+ T cells. Upon obtaining brain slices, activated oligodendrocyte-directed CD8+ T cells are transferred onto the slices to target the myelin sheath and oligodendrocytes. Post-incubation, the damage to myelin and neuronal death can be assessed histologically in the regions of interest.
FAQs
Specificity comes from the pairing between a CD8 T-cell receptor and a particular peptide presented by a major histocompatibility complex class I molecule. This molecular match helps distinguish relevant target cells from others and initiates formation of an immunological synapse, a structured contact site that focuses the cell’s destructive activity on the recognized target.
Cytotoxic CD8 T cells can trigger target-cell apoptosis through more than one mechanism. Perforin and granzymes support a release-based pathway at the immunological synapse, whereas Fas ligand activates a death-receptor pathway through Fas. The presence of these complementary routes allows research to distinguish how target-cell destruction is initiated after recognition.
Their activity connects recognition of infected cells with the outcome of intracellular infection. When research examines whether pathogens are cleared, controlled, or persist, these cells provide a framework for analyzing how peptide presentation, target recognition, and apoptotic elimination contribute to cellular defense. This makes them especially relevant to infection models involving intracellular threats.
Studies of these cells help relate antigen-specific cellular responses to viral clearance and immune protection. By examining how infected targets are recognized and eliminated, researchers can investigate why an immune response contains infection in some settings or permits persistence in others. These findings provide immunological context for understanding protective responses against viral disease.
Vaccine research can use these cells to consider cellular immunity alongside other forms of protection. Because their response depends on recognition of specific peptides displayed by class I molecules, studying their targets and activity helps place antigen selection and infection control in an immunological context. The resulting information supports investigation of vaccines intended to promote protection against intracellular pathogens.
Cancer immunotherapy research focuses on harnessing immune activity against abnormal cells, making cytotoxic CD8 T-cell recognition and killing directly relevant. Their peptide-dependent targeting, synapse formation, and apoptosis-inducing mechanisms provide a framework for studying how cellular defenses might act against cancerous targets and how immune responses could be evaluated in that setting.
In transplant biology, cytotoxic CD8 T cells offer a model for examining how cellular recognition and target-cell elimination may affect transplanted tissue. The same killing mechanisms studied during infection can also inform research on immune-mediated tissue damage. This broader context helps investigators connect protective cytotoxicity with situations in which immune activity may harm tissues.