Antigen-specific Cd8+ T Cells
Antigen-specific Cd8+ T Cells - Related Videos
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.
08:37
In Situ MHC-tetramer Staining and Quantitative Analysis to Determine the Location, Abundance, and Phenotype of Antigen-specific CD8 T Cells in Tissues
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Cited by 11 •
2017
Here, we describe a method that combines in situ MHC-tetramer staining with immunohistochemistry to determine localization, phenotype, and quantity of antigen-specific T cells in tissues. This protocol is used to determine the spatial and phenotypic characteristics of antigen-specific CD8 T cells relative to other cell type and structures in tissues.
03:32
A Technique for the Generation of Antigen-Specific CAR T Cells
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2025
This video demonstrates a technique for generating antigen-specific chimeric antigen receptor (CAR) T cells through retroviral transduction. Activated murine CD8+ T cells are added to a microwell plate coated with recombinant fibronectin fragments. Retroviral vectors containing transgenic RNA encoding an antigen-specific chimeric antigen receptor (CAR) are then introduced, and the plate is centrifuged to facilitate transduction. After incubation, the transduced cells express antigen-specific...
11:07
Whole-animal Imaging and Flow Cytometric Techniques for Analysis of Antigen-specific CD8+ T Cell Responses after Nanoparticle Vaccination
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Cited by 14 •
2015
We describe whole-animal imaging and flow cytometry-based techniques for monitoring expansion of antigen-specific CD8+ T cells in response to immunization with nanoparticles in a murine model of vaccination.
FAQs
Response specificity arises when a T-cell receptor binds a matching peptide presented by a major histocompatibility complex class I molecule. This interaction distinguishes cells displaying the relevant antigen from cells that do not. In infection and cancer studies, that selectivity allows researchers to examine responses directed toward particular pathogen-derived or tumor-associated peptide antigens.
Antigen recognition initiates clonal expansion, producing a larger population of cells with the same antigen-directed specificity. Activated cells also produce cytokines and acquire or intensify cytotoxic activity. Together, these changes increase the immune system’s capacity to respond to cells displaying the recognized peptide during an ongoing infection or tumor-associated immune response.
Perforin and granzymes provide the principal molecular tools for targeted cytotoxicity described for these cells. Following recognition of a relevant peptide-MHC class I display, perforin supports delivery of granzymes into the target cell, where they promote its destruction. This mechanism links precise antigen recognition with selective elimination of infected or abnormal cells.
After an infection, some antigen-specific CD8+ T cells persist as long-lived memory populations rather than disappearing with the initial response. Their persistence supports a faster response when the same antigen is encountered again. This feature makes memory-cell formation especially relevant when researchers assess lasting immunity after infection or vaccination.
Researchers study these cells to determine whether an immune response recognizes particular antigens and develops functional activity against them. Measurements of clonal expansion, cytokine production, cytotoxic activity, and memory formation can describe different aspects of the response. Such information helps evaluate immune responses to pathogens and assess outcomes associated with vaccines.
Changes in antigen-specific CD8+ T-cell responses can provide information about how immunity develops during disease. Their antigen recognition, expansion, cytokine production, targeted killing, and persistence as memory populations represent distinct features researchers can examine. Studying these features helps connect immune activity with pathogen-associated disease progression and the durability of the response.
Their defined antigen specificity and ability to kill recognized target cells make them important to therapeutic research. Adoptive T-cell therapies and other immunotherapies seek to apply or enhance these immune capabilities in disease settings, including cancer. Studying receptor recognition, cytotoxic function, and memory persistence helps researchers understand how such approaches may produce targeted immune effects.