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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.
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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.
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An Efficient and High Yield Method for Isolation of Mouse Dendritic Cell Subsets
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Published on: April 18, 2016

The CD8+ dendritic cell subset.

Ken Shortman1, William R Heath

  • 1The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia. shortman@wehi.edu.au

Immunological Reviews
|March 3, 2010
PubMed
Summary
This summary is machine-generated.

CD8 alpha(+) dendritic cells (DCs) in mice are key immune regulators. These cells present antigens, produce interleukin-12, and are crucial for effective vaccine responses against pathogens.

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Area of Science:

  • Immunology
  • Cell Biology

Background:

  • Dendritic cells (DCs) are critical immune regulators.
  • A distinct subset of mouse lymphoid DCs expresses CD8 alpha and specific pattern recognition receptors.
  • Similar CD8-negative DCs exist in humans.

Purpose of the Study:

  • To characterize the unique functions and origins of mouse CD8 alpha(+) DCs.
  • To understand their role in immune responses and tolerance.
  • To explore their potential in vaccine development.

Main Methods:

  • Flow cytometry to identify DC subsets.
  • Functional assays to assess antigen presentation and cytokine production.
  • In vivo studies to evaluate immune responses.

Main Results:

  • Mouse CD8 alpha(+) DCs are non-migrating, bone marrow-derived cells distinct from monocytes.
  • They efficiently cross-present exogenous antigens on MHC class I.
  • Activated CD8 alpha(+) DCs are major producers of interleukin-12 and stimulate inflammatory responses.
  • In steady state, they maintain self-tissue tolerance.
  • During infection, they promote CD8(+) T-cell responses.

Conclusions:

  • CD8 alpha(+) DCs are specialized immune cells with dual roles in tolerance and immunity.
  • Targeting antigens to CD8 alpha(+) DCs is a promising strategy for inducing cytotoxic T lymphocyte and antibody responses.
  • Further research into CD8 alpha(+) DC biology can advance vaccine design.