Abstract
Estrogen exerts a primary regulatory role on a wide variety of physiological processes in different tissues and organs. Agonistic ad antagonistic compounds are widely used in human health and, therefore, a deep understanding of their mechanisms of action at the molecular level is mandatory. The effect of 17β-estradiol and three antiestrogenic drugs, comprising two selective estrogen receptor modulator (SERM, 4-OH-tamoxifen, Raloxifene) and the pure antiestrogen ICI 182,780, on genome-wide gene expression levels was evaluated in breast carcinoma cell lines by DNA microarray analysis. Different clusters of genes, showing specific coregulation patterns, were found. First, several groups of genes displaying temporal-specific up- or down-regulation were characterized. Second, clusters of genes responding to different antiestrogenic drugs in either antagonstic or agonistic fashion, were found. Genes responding specifically to antiestrogens, but not to estrogen, were also identified. In addition, each individual compound exhibited a very specific gene regulation. Bioinformatic analysis was applied to the regulatory sequences of different groups of genes and confirmed that specific pathways and secondary responses are activated at each temporal point and in response to different compounds. Our results underline the complexity of genomic responses to estrogen in breast cancer cells and strongly suggest that the molecular characterization of estrogen agonists and antagonists used in human therapy should be carefully studied.
| Original language | English |
|---|---|
| Pages (from-to) | 50-55 |
| Number of pages | 6 |
| Journal | Maturitas |
| Volume | 57 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - May 20 2007 |
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Keywords
- Antagonists
- Estrogen
- Human therapy
ASJC Scopus subject areas
- Ageing
- Obstetrics and Gynaecology
Cite this
Influence of estrogens and antiestrogens on the expression of selected hormone-responsive genes. / Sismondi, Piero; Biglia, Nicoletta; Ponzone, Riccardo; Fuso, Luca; Scafoglio, Claudio; Cicatiello, Luigi; Ravo, Maria; Weisz, Alessandro; Cimino, Daniela; Altobelli, Gioia; Friard, Olivier; De Bortoli, Michele.
In: Maturitas, Vol. 57, No. 1, 20.05.2007, p. 50-55.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Influence of estrogens and antiestrogens on the expression of selected hormone-responsive genes
AU - Sismondi, Piero
AU - Biglia, Nicoletta
AU - Ponzone, Riccardo
AU - Fuso, Luca
AU - Scafoglio, Claudio
AU - Cicatiello, Luigi
AU - Ravo, Maria
AU - Weisz, Alessandro
AU - Cimino, Daniela
AU - Altobelli, Gioia
AU - Friard, Olivier
AU - De Bortoli, Michele
PY - 2007/5/20
Y1 - 2007/5/20
N2 - Estrogen exerts a primary regulatory role on a wide variety of physiological processes in different tissues and organs. Agonistic ad antagonistic compounds are widely used in human health and, therefore, a deep understanding of their mechanisms of action at the molecular level is mandatory. The effect of 17β-estradiol and three antiestrogenic drugs, comprising two selective estrogen receptor modulator (SERM, 4-OH-tamoxifen, Raloxifene) and the pure antiestrogen ICI 182,780, on genome-wide gene expression levels was evaluated in breast carcinoma cell lines by DNA microarray analysis. Different clusters of genes, showing specific coregulation patterns, were found. First, several groups of genes displaying temporal-specific up- or down-regulation were characterized. Second, clusters of genes responding to different antiestrogenic drugs in either antagonstic or agonistic fashion, were found. Genes responding specifically to antiestrogens, but not to estrogen, were also identified. In addition, each individual compound exhibited a very specific gene regulation. Bioinformatic analysis was applied to the regulatory sequences of different groups of genes and confirmed that specific pathways and secondary responses are activated at each temporal point and in response to different compounds. Our results underline the complexity of genomic responses to estrogen in breast cancer cells and strongly suggest that the molecular characterization of estrogen agonists and antagonists used in human therapy should be carefully studied.
AB - Estrogen exerts a primary regulatory role on a wide variety of physiological processes in different tissues and organs. Agonistic ad antagonistic compounds are widely used in human health and, therefore, a deep understanding of their mechanisms of action at the molecular level is mandatory. The effect of 17β-estradiol and three antiestrogenic drugs, comprising two selective estrogen receptor modulator (SERM, 4-OH-tamoxifen, Raloxifene) and the pure antiestrogen ICI 182,780, on genome-wide gene expression levels was evaluated in breast carcinoma cell lines by DNA microarray analysis. Different clusters of genes, showing specific coregulation patterns, were found. First, several groups of genes displaying temporal-specific up- or down-regulation were characterized. Second, clusters of genes responding to different antiestrogenic drugs in either antagonstic or agonistic fashion, were found. Genes responding specifically to antiestrogens, but not to estrogen, were also identified. In addition, each individual compound exhibited a very specific gene regulation. Bioinformatic analysis was applied to the regulatory sequences of different groups of genes and confirmed that specific pathways and secondary responses are activated at each temporal point and in response to different compounds. Our results underline the complexity of genomic responses to estrogen in breast cancer cells and strongly suggest that the molecular characterization of estrogen agonists and antagonists used in human therapy should be carefully studied.
KW - Antagonists
KW - Estrogen
KW - Human therapy
UR - http://www.scopus.com/inward/record.url?scp=34247115465&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34247115465&partnerID=8YFLogxK
U2 - 10.1016/j.maturitas.2007.02.019
DO - 10.1016/j.maturitas.2007.02.019
M3 - Article
VL - 57
SP - 50
EP - 55
JO - Maturitas
JF - Maturitas
SN - 0378-5122
IS - 1
ER -