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Updated: Aug 10, 2026

Assay of Adhesion Under Shear Stress for the Study of T Lymphocyte-Adhesion Molecule Interactions
07:40

Assay of Adhesion Under Shear Stress for the Study of T Lymphocyte-Adhesion Molecule Interactions

Published on: June 29, 2016

Inflammatory cytokines up-regulate intercellular adhesion molecule-1 expression on primary cultured mouse hepatocytes

M Morita1, Y Watanabe, T Akaike

  • 1Department of Biomolecular Engineering, Tokyo Institute of Technology, Yokohama, Japan.

Hepatology (Baltimore, Md.)
|February 1, 1994
PubMed

Insights

Inflammatory cytokines like TNF-alpha and IFN-gamma increase intercellular adhesion molecule-1 on hepatocytes, boosting T-lymphocyte adhesion. This mechanism is crucial for understanding hepatitis development.

Area of Science:

  • Immunology
  • Hepatology
  • Cell Biology

Background:

  • Intercellular adhesion molecule-1 (ICAM-1) plays a role in immune cell interactions.
  • Inflammatory cytokines are key mediators in liver inflammation and injury.

Purpose of the Study:

  • To investigate the impact of inflammatory cytokines on ICAM-1 expression in primary murine hepatocytes.
  • To determine the role of ICAM-1 in T-lymphocyte adhesion to hepatocytes.

Main Methods:

  • Primary murine hepatocytes were cultured and stimulated with various cytokines (TNF-alpha, IFN-gamma, IL-1 alpha, IL-6).
  • Intercellular adhesion molecule-1 expression was quantified.
  • T-lymphocyte binding assays were performed on stimulated hepatocytes.
  • Inhibition studies used cycloheximide, actinomycin D, and specific antibodies (anti-ICAM-1, anti-LFA-1, anti-CD44).

Main Results:

  • Tumor necrosis factor-alpha, interferon-gamma, and interleukin-1 alpha dose-dependently upregulated ICAM-1 expression on hepatocytes, peaking at 24 hours.
  • Interleukin-6 did not affect ICAM-1 expression.
  • T-lymphocyte adhesion to hepatocytes increased significantly after stimulation with TNF-alpha and IFN-gamma.
  • Antibodies against ICAM-1 and lymphocyte function-associated antigen-1 (LFA-1) inhibited this adhesion.

Conclusions:

  • Inflammatory cytokines, specifically TNF-alpha and IFN-gamma, enhance T-lymphocyte adhesion to hepatocytes by upregulating ICAM-1 expression via a de novo synthesis pathway.
  • This cytokine-induced ICAM-1 upregulation and subsequent T-lymphocyte adhesion mechanism is likely important in the pathogenesis of hepatitis.

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