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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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Related Experiment Video

Updated: Jun 21, 2026

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Published on: October 18, 2016

The CD300 molecules regulate monocyte and dendritic cell functions.

Georgina J Clark1, Xinsheng Ju, Maryam Azlan

  • 1Mater Medical Research Institute, South Brisbane, Queensland, Australia. gclark@mmri.mater.org.au

Immunobiology
|July 14, 2009
PubMed
Summary
This summary is machine-generated.

The CD300 glycoproteins, crucial immune cell regulators, fine-tune monocyte and dendritic cell functions. Understanding these molecules offers therapeutic potential for inflammatory diseases and allergies.

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Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Biology

Background:

  • CD300 glycoproteins are a family of leukocyte surface molecules.
  • They possess paired triggering and inhibitory receptor functions.
  • All family members share a single Ig-V-like domain and common evolutionary origins.

Purpose of the Study:

  • To review CD300 family members and their expression.
  • To understand the consequences of CD300 expression on monocyte and dendritic cell lineages.
  • To explore therapeutic potential of CD300 molecules.

Main Methods:

  • Literature review of CD300 family members.
  • Analysis of CD300 expression patterns on immune cells.
  • Evaluation of functional consequences and evolutionary significance.

Main Results:

  • CD300 family members exhibit diverse expression on monocytes and dendritic cells.
  • At least one CD300 member shows significant positive selection, indicating essential function.
  • The precise roles of CD300 molecules in modulating cell processes are emerging.

Conclusions:

  • CD300 molecules play a key role in fine-tuning immune responses.
  • Targeting CD300 glycoproteins presents therapeutic opportunities for inflammatory and allergic diseases.