Cytotoxic T Cell Response
Cytotoxic T Cell Response - Related Videos
03:00
An Assay to Evaluate Immunodominance in Cytotoxic T Lymphocyte Responses
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2025
The video showcases a flow cytometry-based assay for assaying immunodominance in cytotoxic T lymphocytes or CTL responses. Injected fluorescent target cells exhibit varying fluorescence corresponding to immunogenic epitopes. Post-spleen collection and sorting reveal a reduction in high-intensity fluorescent cells, confirming immunodominance in CTL responses.
01:27
Cytotoxic T Cells-mediated Immune Response
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2024
Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce. Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
09:46
Accessing the Cytotoxicity and Cell Response to Biomaterials
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Cited by 15 •
2021
This methodology aims to evaluate biomaterial cytotoxicity through the preparation of soluble extracts, using viability assays and phenotypic analysis, including flow cytometry, RT-PCR, immunocytochemistry, and other cellular and molecular biology techniques.
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...
03:14
Obtaining Cytotoxic Amyloids Following Bacterial Infection of Rat Pulmonary Endothelial Cells
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2025
Source: Balczon, R., et al. Methods for Detecting Cytotoxic Amyloids Following Infection of Pulmonary Endothelial Cells by Pseudomonas aeruginosa. J. Vis. Exp. (2018)This video demonstrates the procedure for generating cytotoxic supernatant from pulmonary endothelial cells following infection with Pseudomonas aeruginosa. It outlines how bacterial effector proteins disrupt host cell structure and induce the release of cytotoxic amyloid oligomers into the supernatant.
FAQs
Recognition depends on antigenic peptides displayed by major histocompatibility complex class I molecules on the target cell. This presentation allows CD8+ T lymphocytes to distinguish cells carrying relevant intracellular infection or abnormality from other cells. The specificity of that recognition directs the response toward particular infected, cancerous, or otherwise abnormal cells rather than indiscriminate tissue destruction.
Two principal killing routes are described. Cytotoxic T cells can release perforin and granzymes, or they can activate Fas-mediated signaling in the contacted cell. Both pathways lead to apoptosis, a controlled form of cell death. Using these mechanisms allows the immune response to remove selected target cells while limiting the broader tissue disruption associated with uncontrolled cell injury.
Clonal expansion increases the number of activated T cells that recognize the relevant antigenic peptide. The expanded population can then generate effector cells capable of contacting and eliminating target cells. This amplification helps the response control intracellular pathogens or abnormal tissue, while regulation remains important because excessive or misdirected activity may produce immunopathology and tissue damage.
A typical analysis follows antigen recognition through class I presentation, activation, clonal expansion, effector-cell formation, target-cell contact, and apoptosis induction. Examining these stages helps distinguish whether a response is limited by recognition, expansion, execution of killing, or regulation. The sequence also connects cellular events with outcomes such as pathogen control, abnormal-cell removal, or tissue injury.
It is particularly relevant when researchers examine intracellular pathogens, because infected cells can display antigenic peptides through major histocompatibility complex class I molecules. The resulting response may help control infection by eliminating those cells. This makes cytotoxic T cell activity important for understanding antiviral immunity and for evaluating how immune responses contribute to infection control or immunopathology.
Studies of cytotoxic T cell responses support vaccine development by clarifying how antigen-specific cellular immunity is generated and regulated. They also inform cancer immunotherapy through analysis of abnormal-cell recognition and elimination. In immune-disease research, investigators can examine how excessive or misdirected cytotoxic activity damages tissues, linking protective immunity with potential immunopathology.