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Related Concept Videos

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...
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...
Co-activators and Co-repressors02:04

Co-activators and Co-repressors

Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
Inflammatory Response01:28

Inflammatory Response

An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
Receptor Downregulation in MVBs01:15

Receptor Downregulation in MVBs

Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that  lead to cell proliferation, migration, and differentiation. Overexpression of EGFR  stimulates cells to proliferate. Excessive  EGFR activation may...
Transducer Mechanism: Nuclear Receptors01:31

Transducer Mechanism: Nuclear Receptors

Nuclear receptors, or NRs, are unique transcription factors that regulate gene transcription and affect the cellular pathways involved in reproduction, development, or metabolism. Their ability to be stimulated by small lipophilic ligands and control vital cellular processes makes them ideal drug targets. Nearly 10-15% of currently prescribed drugs target these receptors.
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:

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Related Experiment Video

Updated: May 21, 2026

Phenotypic and Functional Analysis of Activated Regulatory T Cells Isolated from Chronic Lymphocytic Choriomeningitis Virus-infected Mice
07:17

Phenotypic and Functional Analysis of Activated Regulatory T Cells Isolated from Chronic Lymphocytic Choriomeningitis Virus-infected Mice

Published on: June 22, 2016

Aryl hydrocarbon receptor controls regulatory CD4+ T cell function.

Caroline Pot1

  • 1Division of Neurology, Geneva University Hospital and Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland. Caroline.Pot@unige.ch

Swiss Medical Weekly
|June 2, 2012
PubMed
Summary
This summary is machine-generated.

The aryl hydrocarbon receptor (AhR) regulates immune responses and immune tolerance. AhR ligands show potential for treating autoimmune diseases by modulating regulatory T cells.

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Generation of Human Chimeric Antigen Receptor Regulatory T Cells
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Generation of Human Chimeric Antigen Receptor Regulatory T Cells

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Phenotypic and Functional Analysis of Activated Regulatory T Cells Isolated from Chronic Lymphocytic Choriomeningitis Virus-infected Mice
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Phenotypic and Functional Analysis of Activated Regulatory T Cells Isolated from Chronic Lymphocytic Choriomeningitis Virus-infected Mice

Published on: June 22, 2016

Generation of Human Chimeric Antigen Receptor Regulatory T Cells
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Generation of Human Chimeric Antigen Receptor Regulatory T Cells

Published on: January 3, 2025

Area of Science:

  • Immunology
  • Toxicology
  • Pharmacology

Background:

  • The aryl hydrocarbon receptor (AhR) was historically studied as a dioxin receptor in toxicology.
  • Emerging research highlights AhR's crucial role in regulating innate and adaptive immune responses.

Purpose of the Study:

  • To review new insights into AhR signaling and its ligands in immune system regulation.
  • To focus on the modulation of regulatory T cells (Tregs) by AhR for immune tolerance.
  • To explore the therapeutic potential of AhR ligands for autoimmune diseases.

Main Methods:

  • Literature review of recent studies on AhR signaling pathways.
  • Analysis of AhR's role in the development of regulatory T cell subsets.
  • Discussion of pharmacological profiles of different AhR ligands.

Main Results:

  • AhR modulates the development of induced regulatory T cells (iTregs) and type 1 regulatory T (Tr1) cells.
  • AhR influences these regulatory T cell subsets through distinct signaling pathways.
  • AhR ligands exhibit diverse pharmacological properties.

Conclusions:

  • AhR is a key regulator of immune tolerance through its effects on regulatory T cells.
  • Targeting AhR and its ligands offers promising new strategies for treating human autoimmune diseases.