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Related Concept Videos

T Cell Activation and Clonal Selection01:22

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...
T Cell Types and Functions01:24

T Cell Types and Functions

When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview
Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Special Features of Adaptive Immunity01:20

Special Features of Adaptive Immunity

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.
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...

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Related Experiment Video

Updated: Jul 17, 2026

Generation of Induced Regulatory T Cells from Primary Human Naïve and Memory T Cells
14:23

Generation of Induced Regulatory T Cells from Primary Human Naïve and Memory T Cells

Published on: April 16, 2012

Treg cells: guardians for life.

Jonathan A Hill, Christophe Benoist, Diane Mathis

    Nature Immunology
    |January 24, 2007
    PubMed
    Summary

    Regulatory T cells, which express the Foxp3 transcription factor, prevent the immune system from attacking the body. These cells act as crucial guardians, protecting against self-harm and maintaining immune tolerance.

    Area of Science:

    • Immunology
    • Cell Biology
    • Molecular Biology

    Background:

    • Regulatory T cells (Tregs) are critical for immune system homeostasis.
    • The transcription factor Foxp3 is a key marker and functional regulator of Tregs.
    • Autoreactivity poses a significant threat to immune system integrity.

    Discussion:

    • This study highlights the indispensable role of Foxp3+ regulatory T cells in preventing autoimmune diseases.
    • Evidence suggests Tregs are essential for maintaining the 'horror autotoxicus' state, preventing self-attack.
    • The continuous surveillance by Tregs is vital for long-term immune tolerance.

    Key Insights:

    • Foxp3-expressing regulatory T cells are essential for controlling self-reactivity.
    • These regulatory T cells provide constant and robust protection against autoimmune responses.

    More Related Videos

    Regulatory T cells: Therapeutic Potential for Treating Transplant Rejection and Type I Diabetes
    16:26

    Regulatory T cells: Therapeutic Potential for Treating Transplant Rejection and Type I Diabetes

    Published on: August 20, 2007

    Related Experiment Videos

    Last Updated: Jul 17, 2026

    Generation of Induced Regulatory T Cells from Primary Human Naïve and Memory T Cells
    14:23

    Generation of Induced Regulatory T Cells from Primary Human Naïve and Memory T Cells

    Published on: April 16, 2012

    Regulatory T cells: Therapeutic Potential for Treating Transplant Rejection and Type I Diabetes
    16:26

    Regulatory T cells: Therapeutic Potential for Treating Transplant Rejection and Type I Diabetes

    Published on: August 20, 2007

  • The findings underscore the importance of Tregs in preventing the immune system from attacking the body's own tissues.

    • Outlook:

    • Further research into Treg function could reveal new therapeutic targets for autoimmune disorders.
    • Understanding Treg mechanisms may lead to strategies for enhancing immune tolerance.
    • Investigating the 'horror autotoxicus' concept in relation to Tregs offers new avenues for autoimmune disease research.