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Effect of antiestrogens on EGF-mediated movement of human breast cancer cells

Gina M Tong1, Talitha T Rajah, Xiao-Ping Zang

  • 1Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73117, USA. tom-pento@ouhsc.edu

Pharmacology
|December 14, 2006
PubMed

Insights

Epidermal growth factor (EGF) increases breast cancer cell movement. Pretreatment with antiestrogens like tamoxifen completely blocks EGF-enhanced motility in MCF-7 cells.

Area of Science:

  • Oncology
  • Cell Biology
  • Endocrinology

Background:

  • Epidermal growth factor (EGF) has been shown to enhance the invasiveness of estrogen receptor-positive breast cancer cells.
  • Understanding factors influencing cancer cell motility is crucial for developing targeted therapies.

Purpose of the Study:

  • To investigate the effect of three distinct antiestrogens on EGF-mediated motility of human breast cancer cells.
  • To determine if antiestrogens can inhibit EGF-induced cell movement.

Main Methods:

  • Utilized time-lapse videomicroscopy (TLVM) to quantify the rate of movement of MCF-7 breast cancer cells.
  • Cells were pretreated with tamoxifen, ICI-182-780 (ICI), or a diarylcyclopropane derivative (AII) before EGF stimulation.

Main Results:

  • EGF significantly enhanced MCF-7 cell motility within 30-90 minutes.
  • Pretreatment with tamoxifen (TAM) and ICI-182-780 (ICI) completely inhibited EGF-mediated cell motility.
  • The diarylcyclopropane derivative (AII) also demonstrated inhibitory effects, though not explicitly quantified as complete inhibition in the abstract.

Conclusions:

  • EGF promotes the migration of MCF-7 breast cancer cells.
  • Antiestrogen pretreatment effectively inhibits EGF-induced breast cancer cell motility, suggesting a potential therapeutic strategy.

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