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A novel immunoglobulin superfamily junctional molecule expressed by antigen presenting cells, endothelial cells and

F Malergue1, F Galland, F Martin

  • 1CIML INSERM-CNRS, Université de la Méditerranée, Case 906, Marseille, France.

Molecular Immunology
|July 8, 1999
PubMed

Insights

Researchers identified a novel membrane molecule involved in organizing cell junctions within lymphoid tissues. This molecule is expressed by endothelial cells, platelets, and antigen-presenting cells, suggesting a role in microenvironment architecture.

Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • Lymphoid microenvironments are crucial for immune responses and rely on intricate stromal cell interactions.
  • Understanding the molecular basis of these interactions is key to deciphering immune system organization.

Purpose of the Study:

  • To clone and characterize a novel membrane molecule involved in lymphoid microenvironment architecture.
  • To investigate the expression patterns of this molecule in various immune and non-immune cells.

Main Methods:

  • Cloning of a cDNA encoding a novel membrane molecule.
  • Expression analysis using techniques like immunohistochemistry or flow cytometry (inferred).

Main Results:

  • A novel membrane molecule with two external Ig-like domains was identified.
  • The molecule is expressed at endothelial cell junctions, including High Endothelial Venules (HEVs).
  • Expression was also observed on platelets and antigen-presenting cells (MHC class II+) in the thymus and peripheral lymphoid organs, including dendritic cells, epithelial cells, and macrophages.

Conclusions:

  • The novel molecule plays a potential role in organizing cell junctions within diverse microenvironments.
  • Its expression pattern suggests involvement in the structural organization of lymphoid tissues and potentially other cellular interfaces.

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