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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...
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
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,...
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...

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Related Experiment Video

Updated: May 28, 2026

Development of Stem Cell-derived Antigen-specific Regulatory T Cells Against Autoimmunity
10:10

Development of Stem Cell-derived Antigen-specific Regulatory T Cells Against Autoimmunity

Published on: November 8, 2016

Immunoplasticity--triggers of regulatory function.

Adrian M Moser1, Helmut J F Salzer, Robert Krause

  • 1Department of Internal Medicine, Elisabethinen Hospital Graz, A-8010 Graz, Austria. adrianm.moser@hotmail.com

Medical Hypotheses
|October 5, 2011
PubMed
Summary

Regulatory T cells (Tregs) are influenced by many factors. Understanding how these combined triggers affect Treg activity is crucial for immune system control and public health.

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Generation of Induced Regulatory T Cells from Primary Human Naïve and Memory T Cells
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Generation of Induced Regulatory T Cells from Primary Human Naïve and Memory T Cells

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Last Updated: May 28, 2026

Development of Stem Cell-derived Antigen-specific Regulatory T Cells Against Autoimmunity
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Generation of Induced Regulatory T Cells from Primary Human Naïve 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

Area of Science:

  • Immunology
  • Endocrinology
  • Neuroscience

Background:

  • Regulatory T cells (Tregs) are vital immune system components.
  • Tregs are influenced by diverse factors like nerve activity, hormones (vitamin D, glucocorticoids), melatonin, sunlight, and microbes.
  • While single-factor effects on Tregs are known, the impact of combined triggers is less understood.

Purpose of the Study:

  • To highlight the complexity of Treg regulation by multiple coexistent factors.
  • To emphasize the need for research into the dynamics of Treg activity under combined influences.
  • To advocate for a holistic approach to understanding immunoregulatory mechanisms.

Main Methods:

  • Review of existing literature on Treg function and regulation.
  • Analysis of the interplay between various exogenous and endogenous factors affecting Tregs.
  • Conceptual framework development for multi-factorial Treg modulation.

Main Results:

  • Identified numerous factors (autonomous nerve activity, melatonin, vitamin D, glucocorticoids, sunlight, microorganisms) influencing Treg function.
  • Highlighted the complex, interactive, and often indirect effects of these factors on Treg dynamics.
  • Emphasized the knowledge gap regarding the cumulative impact of multiple simultaneous triggers on Treg activity.

Conclusions:

  • The dynamics of Treg activity are critical for immune system homeostasis.
  • A translational, multi- and interdisciplinary research approach is essential for a comprehensive understanding.
  • Holistic research on Treg regulation is vital for advancing public health strategies.