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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...
Antigen Presenting Cells01:22

Antigen Presenting Cells

The immune system is a complex network of cells and molecules that protects the body from foreign invaders. T cells, a type of white blood cell, play a crucial role in this process. They recognize and attack foreign substances, such as pathogens, that enter the body.
T cells require the help of antigen-presenting cells (APCs), which process foreign antigens into smaller fragments that can be recognized by T cells. These APCs are highly specialized cells that efficiently internalize antigens...
B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview
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...

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Related Experiment Video

Updated: May 16, 2026

T Cells Capture Bacteria by Transinfection from Dendritic Cells
11:39

T Cells Capture Bacteria by Transinfection from Dendritic Cells

Published on: January 13, 2016

Crosstalk between T lymphocytes and dendritic cells.

Claire Hivroz1, Karine Chemin, Marie Tourret

  • 1Institut Curie, Centre de Recherche, Pavilion Pasteur, 26 Rue d'ULM, Paris, F-75248, France. hivroz@curie.fr

Critical Reviews in Immunology
|December 11, 2012
PubMed
Summary

Dendritic cells (DCs) educate T cells through specialized interactions. These immunological synapses are crucial for adaptive immunity and T-cell tolerance, highlighting the DC-T cell crosstalk.

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Generation of Human Monocyte-derived Dendritic Cells from Whole Blood
07:35

Generation of Human Monocyte-derived Dendritic Cells from Whole Blood

Published on: December 24, 2016

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Last Updated: May 16, 2026

T Cells Capture Bacteria by Transinfection from Dendritic Cells
11:39

T Cells Capture Bacteria by Transinfection from Dendritic Cells

Published on: January 13, 2016

Generation of Human Monocyte-derived Dendritic Cells from Whole Blood
07:35

Generation of Human Monocyte-derived Dendritic Cells from Whole Blood

Published on: December 24, 2016

Area of Science:

  • Immunology
  • Cell Biology
  • T-cell Biology

Background:

  • Dendritic cells (DCs) are professional antigen-presenting cells (APCs) essential for initiating adaptive immune responses.
  • DCs prime and differentiate naïve T cells (CD4+ and CD8+) into effector cells.
  • DCs play a critical role in maintaining peripheral T-cell tolerance.

Purpose of the Study:

  • To explore the regulation of DC antigen presentation by CD4+ helper T cells.
  • To investigate the concept of DC "education" or "licensing" by T cells.
  • To discuss the role of immunological synapses in T-cell-DC crosstalk.

Main Methods:

  • Review of existing evidence on T-cell-DC interactions.
  • Analysis of molecular mechanisms governing DC function modulation by T cells.
  • Focus on the structural and functional aspects of immunological synapses.

Main Results:

  • T-cell interactions, including surface receptor-ligand binding and cytokine secretion, modify DC functions.
  • This T-cell-mediated "education" is vital for adaptive immunity.
  • Immunological synapses are key structures organizing these critical T-cell-DC interactions.

Conclusions:

  • The crosstalk between DCs and T lymphocytes, mediated by immunological synapses, is fundamental for effective adaptive immunity.
  • Understanding these organized interactions is crucial for deciphering immune responses and tolerance.
  • DC "education" by T cells is a critical regulatory mechanism in adaptive immunity.