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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: Oct 15, 2025

Streamlined Single Cell TCR Isolation and Generation of Retroviral Vectors for In Vitro and In Vivo Expression of Human TCRs

Streamlined Single Cell TCR Isolation and Generation of Retroviral Vectors for In Vitro and In Vivo Expression of Human TCRs

Published on: September 10, 2017

An efficient single-cell based method for linking human T cell phenotype to T cell receptor sequence and specificity.

Ilka Wahl^1,2, Sandro Hoffmann¹, Rebecca Hundsdorfer¹

¹B Cell Immunology, German Cancer Research Center, Heidelberg, Germany.

European Journal of Immunology

|October 28, 2021

Summary

We developed a new platform for analyzing T cell receptor (TCR) repertoires, enabling paired full-length gene sequencing and linking TCR data to cell phenotypes for deeper immune insights.

Keywords:

T cell receptor expression cloning functional TCR analysis phenotype single cell

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Generation of Human Alloantigen-specific T Cells from Peripheral Blood

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Published on: November 21, 2014

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Last Updated: Oct 15, 2025

Streamlined Single Cell TCR Isolation and Generation of Retroviral Vectors for In Vitro and In Vivo Expression of Human TCRs

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Published on: September 10, 2017

Single-cell Screening Method for the Selection and Recovery of Antibodies with Desired Specificities from Enriched Human Memory B Cell Populations

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Published on: August 22, 2019

Generation of Human Alloantigen-specific T Cells from Peripheral Blood

Generation of Human Alloantigen-specific T Cells from Peripheral Blood

Published on: November 21, 2014

Area of Science:

Immunology
Molecular Biology
Genomics

Background:

Current T cell receptor (TCR) repertoire analysis methods often fail to pair full-length gene sequences.
Existing platforms lack the ability to link TCR repertoire data with specific cell phenotype information.
Characterizing TCRs is crucial for understanding immune responses in various diseases.

Purpose of the Study:

To establish a high-throughput platform for comprehensive human TCR repertoire analysis.
To enable quantitative and qualitative assessment of TCRs from phenotypically defined T cell subsets.
To link molecular TCR data with cellular phenotypes for functional insights.

Main Methods:

Development of a novel high-throughput platform for single-cell TCR gene amplification and sequencing.
Integration of phenotypic cell data with full-length paired TCR gene sequences.
Quantitative and qualitative analysis of TCR repertoires in human CD4+ and CD8+ αβ T cells.

Main Results:

The platform successfully generates paired full-length TCR gene products for expression cloning.
It enables the direct linking of TCR repertoire data to specific cell phenotype information.
Provides molecular and cellular level insights into the clonal and functional composition of T cell subsets.

Conclusions:

The developed platform overcomes limitations of existing TCR repertoire analysis methods.
It serves as a powerful tool for qualitatively assessing antigen receptor differences in phenotypically defined T cell subsets.
This strategy is valuable for studying immune responses in cancer, vaccination, infection, and autoimmune diseases.