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Related Concept Videos

T Cell Types and Functions01:24

T Cell Types and Functions

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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...
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T Cell Activation and Clonal Selection01:22

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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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Cell-mediated Immune Responses01:40

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Immune Response Against Viral Pathogens01:29

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The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
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Special Features of Adaptive Immunity01:20

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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.
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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Cells of the Adaptive Immune Response01:23

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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...
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Related Experiment Video

Updated: Nov 24, 2025

Adenoviral Transduction of Naive CD4 T Cells to Study Treg Differentiation
15:33

Adenoviral Transduction of Naive CD4 T Cells to Study Treg Differentiation

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Tregs self-organize into a computing ecosystem and implement a sophisticated optimization algorithm for mediating

Robert Marsland1, Owen Howell2, Andreas Mayer3

  • 1Department of Physics, Boston University, Boston, MA 02215; pankajm@bu.edu marsland@bu.edu.

Proceedings of the National Academy of Sciences of the United States of America
|December 29, 2020
PubMed
Summary
This summary is machine-generated.

Regulatory T cells (Tregs) maintain self-tolerance by inhibiting T cell proliferation. Lowering Treg diversity can trigger a transition to autoimmunity, impacting adaptive immunity.

Keywords:
Tregsadaptive immunitybiophysicsecologyoptimization

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Last Updated: Nov 24, 2025

Adenoviral Transduction of Naive CD4 T Cells to Study Treg Differentiation
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Adenoviral Transduction of Naive CD4 T Cells to Study Treg Differentiation

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Area of Science:

  • Immunology
  • Computational Biology
  • Theoretical Ecology

Background:

  • Regulatory T cells (Tregs) are vital for immune response and self-tolerance.
  • An algorithmic understanding of Treg function in adaptive immunity is needed.

Purpose of the Study:

  • To develop a biophysically realistic model of Treg-mediated self-tolerance.
  • To investigate the relationship between Treg diversity, self-antigen concentration, and autoimmune responses.

Main Methods:

  • A computational model simulating Treg-antigen interactions and T cell proliferation.
  • Exploitation of a duality between ecological dynamics and constrained optimization.
  • Analysis of Treg tiling of antigen space and activation profile overlap.

Main Results:

  • Tregs tile the antigen space and minimize overlap in activation profiles.
  • High Treg diversity ensures robustness to self-antigen fluctuations.
  • Reduced Treg diversity leads to a sharp transition to autoimmunity.

Conclusions:

  • Treg diversity is critical for maintaining self-tolerance.
  • A sharp transition exists, beyond which self-antigen fluctuations can cause autoimmunity.
  • The study proposes an experimental validation and discusses implications for autoimmune diseases.