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Related Concept Videos

T Cell Types and Functions01:24

T Cell Types and Functions

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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.
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Regulation of Hematopoietic Stem Cells01:01

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All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
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Cells of the Adaptive Immune Response01:23

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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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Cells of the Innate Immune Response01:28

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The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
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B Cell Activation and Differentiation01:24

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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.
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Isolation of Murine Lymph Node Stromal Cells
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Dynamic STING repression orchestrates immune cell development and function.

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  • 1Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX, USA.

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Summary
This summary is machine-generated.

Regulating STING (stimulator of interferon genes) is crucial for immune cell development. Controlled STING expression prevents inflammatory disease and T cell dysfunction, highlighting its importance in immunity and cancer.

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Area of Science:

  • Immunology
  • Molecular Biology
  • Cancer Research

Background:

  • STING (stimulator of interferon genes) is a key innate immune sensor, but its normal expression and regulation remain unclear.
  • Understanding STING regulation is vital for immune cell development and function.

Purpose of the Study:

  • To investigate the homeostatic expression patterns and regulatory mechanisms of STING in immune cells.
  • To determine the impact of STING dysregulation on immune cell development, function, and disease.

Main Methods:

  • Utilized Sting1 reporter and conditional Sting1 transgenic mouse models.
  • Analyzed STING expression during T lymphocyte development and in the tumor microenvironment.
  • Investigated epigenetic silencing mechanisms involving DNA methyltransferase 1.

Main Results:

  • STING expression is repressed in neutrophils; forced expression causes systemic inflammation.
  • Epigenetic silencing of STING occurs during T cell development, impacting lineage commitment.
  • CD8+ T cells in tumors suppress STING, correlating with T cell exhaustion in mice and human colorectal cancer.

Conclusions:

  • Controlled, rather than ubiquitous, STING expression is essential for immune homeostasis.
  • STING dysregulation contributes to inflammatory diseases and impaired adaptive immunity.
  • STING regulation in the tumor microenvironment represents a novel aspect of STING pathobiology and T cell exhaustion.