Cytotoxic T Cells
Cytotoxic T Cells - 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...
08:04
Cytotoxic Efficacy of Photodynamic Therapy in Osteosarcoma Cells In Vitro
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Cited by 8 •
2014
The protocol reported here allows the evaluation of the efficacy of photodynamic therapy (PDT) in cell lines and the optimization of the PDT settings before applying the therapy in animal models.
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.
09:28
Quantitative High-throughput Single-cell Cytotoxicity Assay For T Cells
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Cited by 25 •
2013
We describe a single-cell high-throughput assay to measure cytotoxicity of T cells when incubated with tumor target cells. This method employs a dense, elastomeric array of sub-nanoliter wells (~100,000 wells/array) to spatially confine the T cells and target cells at defined ratios and is coupled to fluorescence microscopy to monitor effector-target conjugation and subsequent apoptosis.
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
The key recognition condition is presentation of a specific antigen by major histocompatibility complex class I molecules. This requirement gives the response antigen-specific direction rather than indiscriminate activity. In biology research, examining which antigen is displayed with class I molecules helps explain why a cytotoxic response is focused on particular infected, damaged, or abnormal cells.
The immunological synapse provides the organized contact between a cytotoxic T cell and its target. Within this interaction, release of perforin and granzymes is directed toward the recognized cell, linking antigen recognition to the target’s loss of viability. Studying this interface helps connect cell-cell recognition with the downstream elimination response.
Perforin and granzymes act as a linked effector system rather than unrelated secretions. Their activity produces membrane disruption and triggers programmed cell death, giving the response two described consequences at the target-cell level. This distinction matters when interpreting cytotoxicity experiments, because target-cell damage and programmed death represent related but separable outcomes.
Cytotoxic T cells are especially relevant when adaptive cellular immunity must control viral infection or monitor abnormal cells. Their activity can therefore be examined in both infectious-disease models and tumor biology. The same killing capacity also creates a risk: if regulation fails, healthy tissues may be damaged, making response control an important research question.
In cancer biology, investigators study these cells to understand immune surveillance against tumors and to explore T cell-based therapies. In infectious-disease research, the focus can shift toward cellular responses that help control viral infections. Across both areas, the central outcomes are target-cell elimination, immune control, and the consequences of insufficient or excessive activity.
Their relevance extends beyond infection and cancer because cytotoxic activity can influence transplantation and tissue injury. Researchers may therefore examine whether responses are appropriately directed toward abnormal targets or instead affect healthy tissue. This context connects cellular mechanism with research questions about immune surveillance, dysregulated responses, and the design of T cell-based therapies.