Identification of genes involved in growth inhibition of breast cancer cells transduced with estrogen receptor

Anne Licznar, Simona Caporali, Annick Lucas, Alessandro Weisz, Françoise Vignon, Gwendal Lazennec

Research output: Contribution to journalArticlepeer-review

Abstract

Estrogen receptor α (ERα)-negative breast cancer cells display an aggressive phenotype. We previously showed that adenoviral expression of ERα in ER-negative breast cancer cells leads to an estrogen-dependent down-regulation of the proliferation, which could be of interest to control the growth of such cells. In this study, we observed an increase in protein levels of p21 and p27 cyclin-dependent kinase inhibitors, whereas pRb phosphorylation is strongly decreased. Flow cytometry experiments showed a slower transit of cells in G1 (hormone-independent), a hormone-induced accelerated transit through S phase and a possible arrest in G2/M phase. In addition, ERα-expressing cells were undergoing apoptosis. By using cDNA macroarrays, we identified a novel collection of genes regulated by liganded ERα potentially regulating cell cycle, apoptosis, cell signalling, stress response and DNA repair.

Original languageEnglish
Pages (from-to)445-450
Number of pages6
JournalFEBS Letters
Volume553
Issue number3
DOIs
Publication statusPublished - Oct 23 2003

Keywords

  • cDNA array
  • Estrogen
  • Proliferation
  • Receptor

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Molecular Biology

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