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T Cell Activation and Clonal Selection

T Cell Activation and Clonal Selection

T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...

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Updated: Mar 6, 2026

Imaging the Human Immunological Synapse

Imaging the Human Immunological Synapse

Published on: December 26, 2019

Imaging the Effector CD8 Synapse.

Gordon L Frazer¹, Yukako Asano¹, Gillian M Griffiths²

¹Cambridge Institute for Medical Research, University of Cambridge, Cambridge, CB2 0XY, UK.

Methods in Molecular Biology (Clifton, N.J.)

|March 4, 2017

Summary

This summary is machine-generated.

This study visualizes effector CD8+ T cells interacting with target cells using 4D imaging. Researchers analyzed how internal cell compartments move to the contact site during cell killing.

Keywords:

4D object-based image analysis Imaris Nucleofection Time-lapse confocal imaging

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Last Updated: Mar 6, 2026

Imaging the Human Immunological Synapse

Imaging the Human Immunological Synapse

Published on: December 26, 2019

An Endothelial Planar Cell Model for Imaging Immunological Synapse Dynamics

An Endothelial Planar Cell Model for Imaging Immunological Synapse Dynamics

Published on: December 24, 2015

Imaging of HIV-1 Envelope-induced Virological Synapse and Signaling on Synthetic Lipid Bilayers

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Published on: March 8, 2012

Area of Science:

Immunology
Cell Biology
Microscopy

Background:

Effector CD8+ T cells are crucial for adaptive immunity.
Understanding T cell-mediated cytotoxicity requires detailed visualization of cellular interactions.
The dynamics of intracellular compartments during T cell conjugation are not fully understood.

Purpose of the Study:

To visualize and analyze the 4D dynamics of effector CD8+ T cell conjugation and killing of live targets.
To investigate the polarization and dynamics of intracellular compartments at the immune synapse.

Main Methods:

Utilized advanced 4D (three-dimensional space + time) imaging techniques.
Observed effector CD8+ T cells interacting with live target cells in vitro.
Analyzed the movement and polarization of intracellular compartments during cell-cell conjugation.

Main Results:

Successfully captured real-time 4D imaging of CD8+ T cell-target cell interactions.
Demonstrated the dynamic polarization of intracellular compartments towards the cell-cell interface.
Provided insights into the spatial and temporal regulation of cytotoxic T lymphocyte activity.

Conclusions:

4D imaging provides unprecedented resolution of cytotoxic T lymphocyte conjugation and killing.
Intracellular compartment polarization is a key feature of effector CD8+ T cell function.
This approach facilitates further investigation into immune synapse formation and function.