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Spatial and Temporal Control of T Cell Activation Using a Photoactivatable Agonist
07:48

Spatial and Temporal Control of T Cell Activation Using a Photoactivatable Agonist

Published on: April 25, 2018

The activation antigen CD69

S F Ziegler1, F Ramsdell, M R Alderson

  • 1Department of Molecular Genetics, Immunex Research and Development Corporation, Seattle, Washington 98101.

Stem Cells (Dayton, Ohio)
|September 1, 1994
PubMed

Insights

CD69 is an early T cell activation marker that also functions as a costimulatory molecule. Its broad expression across immune cells suggests a key role in regulating immune responses.

Area of Science:

  • Immunology
  • Molecular Biology
  • Genetics

Background:

  • CD69 is an early cell surface antigen expressed on T cells after T cell receptor/CD3 complex ligation.
  • CD69 functions as a costimulatory molecule, enhancing T cell activation and proliferation.
  • CD69 expression is induced in various immune cells, including B cells, NK cells, monocytes, and neutrophils, and constitutively present on mature thymocytes and platelets.

Purpose of the Study:

  • To investigate the role of CD69 as a pleiotropic immune regulator.
  • To understand the structural, chromosomal, and functional characteristics of CD69.
  • To explore CD69's potential importance in NK cell function and hematopoietic cell differentiation.

Main Methods:

  • Isolation of cDNA clones encoding human and mouse CD69.
  • Gene mapping studies to determine chromosomal localization.
  • Analysis of CD69 expression patterns and functional assays.

Main Results:

  • CD69 was identified as a member of the C-type lectin superfamily.
  • Chromosomal localization placed CD69 near the NK gene complex on mouse chromosome 6 and human chromosome 12p13.
  • CD69's structure, localization, and expression suggest a role in immune regulation.

Conclusions:

  • CD69 is a pleiotropic immune regulator with potential roles beyond NK cells.
  • Its function impacts the activation and differentiation of diverse hematopoietic cells.
  • CD69 is a significant molecule in the broader immune system's regulatory network.

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