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Identification of genes involved in growth inhibition of breast cancer cells transduced with estrogen receptor
Author(s) -
Licznar Anne,
Caporali Simona,
Lucas Annick,
Weisz Alessandro,
Vig Françoise,
Lazennec Gwendal
Publication year - 2003
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/s0014-5793(03)01090-1
Subject(s) - estrogen receptor , cancer research , biology , cell cycle , cell growth , cancer cell , estrogen receptor alpha , flow cytometry , estrogen , apoptosis , cyclin d1 , microbiology and biotechnology , breast cancer , cancer , endocrinology , genetics
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.