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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: Dec 31, 2025

Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets

Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets

Published on: April 16, 2015

CD4⁺ T-Cell Differentiation In Vitro.

Wenyong Yang¹, Xueying Chen¹, Hongbo Hu²

¹Department of Rheumatology and Immunology, State Key Laboratory of Biotherapy and Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, China.

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

|January 15, 2020

Summary

This summary is machine-generated.

This study details protocols for in vitro differentiation of CD4+ T helper cells into Th1, Th2, Th17, and Treg lineages. These methods are essential for studying T-cell regulation and function in adaptive immunity.

Keywords:

CD4+ T cells Cytokines Flow cytometry T-cell differentiation TCR activation

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In Vitro Differentiation of Human CD4⁺FOXP3⁺ Induced Regulatory T Cells (iTregs) from Naïve CD4⁺ T Cells Using a TGF-β-containing Protocol

Published on: December 30, 2016

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Last Updated: Dec 31, 2025

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In Vitro Differentiation of Human CD4+FOXP3+ Induced Regulatory T Cells (iTregs) from Naïve CD4+ T Cells Using a TGF-β-containing Protocol

In Vitro Differentiation of Human CD4⁺FOXP3⁺ Induced Regulatory T Cells (iTregs) from Naïve CD4⁺ T Cells Using a TGF-β-containing Protocol

Published on: December 30, 2016

Area of Science:

Immunology
Cell Biology

Background:

CD4+ T helper cells are vital for adaptive immunity and immune homeostasis.
Naïve CD4+ T cells differentiate into distinct lineages (Th1, Th2, Th17, Treg) based on cytokine signals.
Understanding T helper cell differentiation is crucial for studying immune responses.

Purpose of the Study:

To establish reliable in vitro protocols for differentiating naïve CD4+ T cells.
To enable the study of T helper cell lineage-specific mechanisms and functions.
To provide methods for investigating immune responses in vitro.

Main Methods:

Activation of T-cell receptor (TCR) signaling in naïve CD4+ T cells.
Culture with specific combinations of cytokines and blocking antibodies.
Induction of differentiation into Th1, Th2, Th17, and Treg lineages.
Assessment of differentiation efficiency via hallmark cytokine and transcription factor expression.

Main Results:

Established protocols successfully induce CD4+ T-cell differentiation into specified lineages.
Demonstrated the ability to generate distinct Th cell populations in vitro.
Validated differentiation efficiency through molecular markers.

Conclusions:

The described in vitro methods are effective for generating specific T helper cell subsets.
These protocols facilitate research into T cell-mediated immunity and immune regulation.
This work provides a foundation for further investigation of T helper cell biology.