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Related Concept Videos

Special Features of Adaptive Immunity01:20

Special Features of Adaptive Immunity

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The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
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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.
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Related Experiment Video

Updated: Jan 2, 2026

Examination of Thymic Positive and Negative Selection by Flow Cytometry
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New insights on T-cell self-tolerance.

Jaeu Yi1, Takeshi Kawabe2, Jonathan Sprent3

  • 1Division of Rheumatology, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA.

Current Opinion in Immunology
|December 2, 2019
PubMed
Summary

T regulatory cells (Tregs) maintain T cell self-tolerance by controlling naive and memory T cell populations. Tregs influence T cell compartmentalization, ensuring immune homeostasis and preventing autoimmunity.

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Area of Science:

  • Immunology
  • Cellular Biology
  • T cell biology

Background:

  • Self-tolerance in T cells is crucial for preventing autoimmune diseases.
  • T regulatory cells (Tregs) and thymic negative selection are key mechanisms for maintaining T cell self-tolerance.
  • Recognition of self MHC ligands drives both thymic selection and Treg function.

Purpose of the Study:

  • To review the role of T regulatory cells (Tregs) in shaping T cell populations.
  • To discuss how Tregs contribute to the compartmentalization of T cells into naive and memory phenotypes.
  • To explore the mechanisms by which Tregs influence T cell differentiation and homeostasis.

Main Methods:

  • Literature review of T cell immunology and T regulatory cell function.
  • Analysis of mechanisms underlying T cell tolerance and differentiation.
  • Synthesis of current understanding of Treg-mediated immune regulation.

Main Results:

  • Treg function, alongside thymic negative selection, is essential for maintaining T cell self-tolerance.
  • Tregs ensure most T cells remain quiescent as naive cells.
  • Tregs also facilitate the proliferation and differentiation of some T cells into memory phenotype (MP) cells.

Conclusions:

  • T regulatory cells play a critical role in orchestrating the balance between naive and memory T cell subsets.
  • This Treg-driven compartmentalization is vital for immune homeostasis.
  • Understanding Treg function provides insights into maintaining immune tolerance and preventing disease.