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Related Concept Videos

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...
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview
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...
Antigens Involved in Adaptive Immunity01:26

Antigens Involved in Adaptive Immunity

An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
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: May 29, 2026

Generation of Human Monocyte-derived Dendritic Cells from Whole Blood
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Generation of Human Monocyte-derived Dendritic Cells from Whole Blood

Published on: December 24, 2016

Dendritic cells: indispensable?

Gerold Schuler1

  • 1Department of Dermatology, University Hospital Erlangen, Germany. gerold.schuler@uk-erlangen.de

Cancer Journal (Sudbury, Mass.)
|September 29, 2011
PubMed
Summary
This summary is machine-generated.

Dendritic cells (DCs) regulate T cell responses, promoting tolerance or immunity. Understanding DC subsets and maturation is key to optimizing vaccine development and immunotherapy strategies.

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Last Updated: May 29, 2026

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Study of Dendritic Cell Development by Short Hairpin RNA-Mediated Gene Knockdown in a Hematopoietic Stem and Progenitor Cell Line In vitro

Published on: March 7, 2022

Area of Science:

  • Immunology
  • Cell Biology
  • Vaccinology

Background:

  • Dendritic cells (DCs) are critical regulators of adaptive immunity, controlling T cell initiation and differentiation.
  • In physiological conditions, DCs maintain immune tolerance.
  • Immune activation requires the maturation of DCs, often induced by adjuvants, to overcome their tolerogenic functions.

Purpose of the Study:

  • To explore the distinct subsets of dendritic cells and their unique roles in T cell polarization.
  • To understand how dendritic cell properties can be leveraged for vaccine optimization.
  • To investigate the mechanisms by which dendritic cells switch from tolerance to immunity.

Main Methods:

  • Analysis of dendritic cell subsets based on endocytic and signaling receptor expression.
  • Assessment of T cell differentiation and polarization capacities of different DC subsets.
  • Evaluation of antigen cross-presentation by DCs for CD8+ T cell expansion.

Main Results:

  • Dendritic cell subsets exhibit differential expression of receptors, influencing their functional specialization.
  • Distinct DC subsets possess varying abilities to differentiate and polarize T cells.
  • Specific DC subsets are more effective at cross-presenting antigens to expand CD8+ T cells.

Conclusions:

  • Dendritic cells represent a heterogeneous system with subset-specific functions crucial for immune responses.
  • Targeting the unique biological properties of dendritic cell subsets offers a promising strategy for enhancing vaccine efficacy.
  • Modulating dendritic cell maturation and function is essential for effective immunization and immunotherapy.