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Inhibition of gap-junctional intercellular communication between epithelial cells transformed by the activated

L Vanhamme1, S Rolin, C Szpirer

  • 1Département de Biologie Moléculaire, Université Libre de Bruxelles, Rhode-St-Genèse, Belgium.

Experimental Cell Research
|January 1, 1989
PubMed

Insights

An activated H-ras-1 oncogene significantly inhibits gap-junctional intercellular communication in epithelial cells. This oncogene may affect communication by altering the phosphorylation of key gap junction proteins.

Area of Science:

  • Cell Biology
  • Oncology
  • Molecular Biology

Background:

  • Gap-junctional intercellular communication (GJIC) is crucial for coordinating cellular functions.
  • Oncogenes, such as H-ras-1, can drive cellular transformation and alter cell behavior.

Purpose of the Study:

  • To investigate the impact of an activated H-ras-1 oncogene on GJIC.
  • To determine if H-ras-1 transformation affects intercellular communication in epithelial cells.

Main Methods:

  • Introduction of the EJ/T24 H-ras-1 oncogene into Clone 9-3 epithelial cells.
  • Assessment of GJIC in H-ras-1-transformed cell derivatives.

Main Results:

  • A significant reduction in GJIC was observed in H-ras-1-transformed Clone 9-3 cells.
  • Transformation by activated H-ras-1 oncogene inhibits GJIC.

Conclusions:

  • Activated H-ras-1 oncogene negatively regulates GJIC.
  • The H-ras-1 oncogene product may mediate this inhibition via phosphorylation changes in major gap junction proteins.

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