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Intercellular adhesion molecule-1 (ICAM-1) expression and cell signaling cascades

A K Hubbard1, R Rothlein

  • 1Department of Pharmaceutical Sciences, University of Connecticut, Storrs, CT 06269, USA. Hubbard@uconnvm.uconn.edu

Free Radical Biology & Medicine
|August 5, 2000
PubMed

Insights

Intercellular adhesion molecules (ICAMs), particularly ICAM-1, mediate cell interactions and inflammation. ICAM-1 expression increases with cytokines, influencing immune cell trafficking and signaling pathways.

Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • Cell-cell interactions are crucial for biological processes.
  • Adhesion molecules, including Intercellular Adhesion Molecules (ICAMs), mediate these interactions.
  • ICAMs are ligands for beta2 integrins on leukocytes.

Purpose of the Study:

  • To review the role of ICAMs, with a focus on ICAM-1.
  • To understand ICAM-1 expression regulation and functions.
  • To explore ICAM-1's involvement in cellular signaling.

Main Methods:

  • Literature review of studies on ICAMs and ICAM-1.
  • Analysis of ICAM-1 expression patterns under various conditions.
  • Examination of ICAM-1's downstream signaling effects.

Main Results:

  • ICAM-1 is a key adhesion molecule, part of the immunoglobulin supergene family.
  • Its expression is upregulated by cytokines (TNFalpha, IL-1, IFNgamma) and reactive oxygen species.
  • ICAM-1 engagement triggers signaling cascades, affecting gene expression, protein levels, and cell proliferation.

Conclusions:

  • ICAM-1 plays a significant role in inflammatory cell trafficking and antigen presentation.
  • ICAM-1 mediates outside-in signaling, impacting cellular functions.
  • Understanding ICAM-1 is vital for comprehending immune responses and pathogenesis.

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