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Related Experiment Video

Updated: Feb 13, 2026

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Epidermal growth factor receptor function in the human urothelium.

C Wasén1, M Ekstrand2, M Levin2,3

  • 1Department of Pharmacology, The Sahlgrenska Academy, University of Gothenburg, Box 431, 405 30, Göteborg, Sweden.

International Urology and Nephrology
|March 7, 2018
PubMed
Summary

Epidermal growth factor receptor (EGFr) inhibition slows urothelial cell growth and disrupts 3D structure formation. This suggests EGFr plays a key role in urothelial cell proliferation and tissue organization.

Keywords:
Epidermal growth factor receptorOccludinProliferationThree-dimensional cell cultureUrothelium

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Area of Science:

  • Urothelial biology
  • Cancer research
  • Cell signaling

Background:

  • Epidermal growth factor receptor (EGFr) targeted therapy is a potential treatment for urinary bladder cancer.
  • Understanding EGFr's role in normal and malignant urothelium is crucial for developing effective therapies.

Purpose of the Study:

  • To investigate the role of EGFr in urothelial cell proliferation and migration.
  • To evaluate the effects of EGFr inhibition on normal (UROtsa) and malignant (T24) urothelial cells in 2D and 3D culture systems.

Main Methods:

  • Cultured normal (UROtsa) and malignant (T24) urothelial cells in collagen gel.
  • Assessed proliferation and migration with and without the EGFr inhibitor cetuximab.
  • Analyzed expression of key proteins including cytokeratins, EGFr, and tight junction proteins using immunohistochemistry and western blot.

Main Results:

  • Cetuximab inhibited proliferation and induced EGFr cleavage in both UROtsa and T24 cells.
  • Urothelial migration was not affected by cetuximab treatment.
  • Cetuximab treatment cleaved occludin and inhibited spheroid formation in UROtsa cells.

Conclusions:

  • EGFr signaling modulates urothelial proliferation and 3D structure formation, potentially via interaction with occludin.
  • A novel cell culture technique was established to differentiate normal urothelial cells into epithelial structures, unlike malignant cells.