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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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Related Experiment Video

Updated: Jan 7, 2026

Spatial and Temporal Control of T Cell Activation Using a Photoactivatable Agonist

Spatial and Temporal Control of T Cell Activation Using a Photoactivatable Agonist

Published on: April 25, 2018

Methods for Analyzing Human T Cell Activation Through TCR or CAR Engagement.

Loredana Saveanu¹, Irini Evnouchidou²

¹Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, Université Paris Cité, Paris, France.

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

|January 1, 2026

Summary

This study outlines methods for activating human T cells via T Cell Receptor (TCR) or Chimeric Antigen Receptors (CARs) for cancer immunotherapy. It details activation techniques and analysis methods like ELISA, Western blot, and flow cytometry.

Keywords:

CAR ELISA T cell activation TCR Western blot flow cytometry

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Last Updated: Jan 7, 2026

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Published on: April 25, 2018

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Published on: January 22, 2019

Area of Science:

Immunology
Cancer Immunotherapy
Cellular Biology

Background:

Chimeric Antigen Receptors (CARs) and T Cell Receptors (TCRs) are crucial for T cell activation in cancer immunotherapy.
CAR T-cell therapy is a promising approach for treating various cancers.

Purpose of the Study:

To describe fundamental methods for activating human T cells using TCR or CAR.
To present techniques for analyzing T cell activation.

Main Methods:

T cell activation using Antigen Presenting Cells (APCs) with natural antigens or superantigens.
Activation via soluble antibodies or antibody-coated beads.
Analysis of T cell activation through cytokine detection (ELISA), phosphoprotein analysis (Western blot), and cell surface marker expression (flow cytometry).

Main Results:

Successful activation of human T cells was achieved using the described methods.
Demonstrated feasibility of analyzing T cell activation through multiple techniques.

Conclusions:

The described methods provide a foundation for T cell activation and analysis in immunotherapy research.
These techniques are essential for developing and optimizing CAR T-cell therapies for cancer treatment.