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Related Concept Videos

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,...
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...
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...
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview
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...

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Related Experiment Video

Updated: Jul 10, 2026

Generation of Induced Regulatory T Cells from Primary Human Na&iuml;ve 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

Generating intrathymic microenvironments to establish T-cell tolerance.

Graham Anderson1, Peter J L Lane, Eric J Jenkinson

  • 1MRC Centre for Immune Regulation, Institute for Biomedical Research, Medical School, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK. g.anderson@bham.ac.uk

Nature Reviews. Immunology
|November 10, 2007
PubMed
Summary
This summary is machine-generated.

This review explores the stromal microenvironments crucial for alphabeta T cell development and function. It details how thymic epithelial cells shape T cell tolerance and competence, impacting immune responses.

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Area of Science:

  • Immunology
  • Cell Biology
  • Developmental Biology

Background:

  • Alphabeta T cells require specific microenvironments for proper development and function.
  • The thymus is a primary lymphoid organ where T cells acquire self-tolerance and functional competence.
  • Secondary lymphoid organs are sites for primary and memory immune responses mediated by T cells.

Purpose of the Study:

  • To review the microenvironments that nurture T cell development.
  • To summarize knowledge on thymic epithelial cell microenvironment formation.
  • To highlight similarities between thymic and peripheral T cell-supporting environments.

Main Methods:

  • Literature review of T cell development and microenvironment research.
  • Synthesis of current knowledge on thymic epithelial cell microenvironments.
  • Comparative analysis of T cell nurturing environments.

Main Results:

  • T cell development involves distinct microenvironments in the thymus cortex (positive selection) and medulla (negative selection).
  • Stromal microenvironments are critical for T cell tolerance and functional competence acquisition.
  • Similarities exist between thymic developmental environments and those supporting T cells in immune responses.

Conclusions:

  • Microenvironments play a pivotal role in shaping the T cell repertoire and function.
  • Understanding thymic epithelial cell microenvironments is key to comprehending T cell education.
  • The study underscores the continuous importance of specific microenvironments throughout T cell lifespan and function.