Paracrine effect of TGF-beta1 on downregulation of gap junctional intercellular communication between human dermal

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Published on: October 27, 2020

Dominik Stuhlmann1, Holger Steinbrenner, Bernhard Wendlandt

  • 1Institute for Biochemistry and Molecular Biology I, Heinrich-Heine-University, D-40225 Düsseldorf, Germany.

Biochemical and Biophysical Research Communications
|June 5, 2004
PubMed

Insights

Transforming growth factor-beta1 (TGF-beta1) from tumor cells downregulates gap junctional intercellular communication (GJIC) in stromal fibroblasts. Antioxidants prevent this TGF-beta1 effect, suggesting a role for reactive oxygen species in tumor-stroma communication.

Area of Science:

  • Oncology
  • Cell Biology
  • Carcinogenesis

Background:

  • Disruption of gap junctional intercellular communication (GJIC) is linked to cancer progression.
  • Tumor cells interact with stromal environments via growth factors, facilitating invasion.

Purpose of the Study:

  • To investigate the role of growth factors in downregulating GJIC in dermal fibroblasts (stromal model).
  • To identify specific growth factors involved in this communication disruption.

Main Methods:

  • Examined the effect of tumor-derived growth factors on GJIC in dermal fibroblasts.
  • Investigated the mechanism involving reactive oxygen species (ROS) and antioxidants.

Main Results:

  • Transforming growth factor-beta1 (TGF-beta1) was identified as a key factor downregulating GJIC.
  • TGF-beta1 increased ROS levels in fibroblasts, leading to reduced intercellular communication.
  • Antioxidants, like N-acetyl-L-cysteine, blocked TGF-beta1's inhibitory effect on GJIC.

Conclusions:

  • TGF-beta1 contributes to tumor progression by disrupting stromal cell communication via ROS.
  • Targeting ROS may offer a strategy to restore GJIC and inhibit tumor invasion.

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