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Updated: Jun 19, 2026
06:18
An In Vivo Estrogen Deficiency Mouse Model for Screening Exogenous Estrogen Treatments of Cardiovascular Dysfunction After Menopause
Published on: August 13, 2019
Cell proliferation regulated by estradiol receptor: Therapeutic implications
Gabriella Castoria1, Antimo Migliaccio, Pia Giovannelli
1Dipartimento di Patologia Generale, II Università di Napoli, Via L. De Crecchio 7, 80138 Naples, Italy.
Steroids
|November 3, 2009
Summary
Estrogen receptor (ER) plays a key role in breast cancer cell growth. Beyond its known function, ER also triggers rapid signaling pathways, contributing to tumor progression and therapy resistance in breast cancer.
Area of Science:
- Oncology
- Molecular Biology
- Endocrinology
Background:
- Estrogen receptor (ER) is a critical regulator of human breast cancer cell proliferation, expressed in 60-70% of cases.
- Despite therapeutic advances, many breast cancer patients develop resistance to treatments, leading to metastatic disease.
- The precise mechanisms driving hormone-dependent breast tumor progression and therapy resistance remain under investigation.
Purpose of the Study:
- To investigate the non-transcriptional roles of Estrogen Receptor (ER) in breast cancer.
- To explore how ER signaling contributes to tumor progression and therapeutic resistance.
- To identify novel therapeutic strategies targeting rapid ER-mediated responses.
Main Methods:
- Analysis of signaling pathways activated by ER in breast cancer cells.
- Investigation of ER's role in response to ligand binding and growth factors.
- Development and testing of novel compounds targeting rapid ER-mediated signaling.
Main Results:
- ER activation, beyond transcriptional regulation, stimulates rapid proliferative and anti-apoptotic signaling pathways in breast cancer cells.
- These rapid responses are triggered by both ligand binding and growth factors.
- Evidence supports ER's involvement in mechanisms of therapeutic resistance and tumor progression.
Conclusions:
- ER exerts rapid, non-transcriptional effects that promote breast cancer cell proliferation and survival.
- These findings necessitate a re-evaluation of current breast cancer treatment modalities.
- Targeting these rapid ER-mediated signaling pathways offers a promising avenue for novel breast cancer therapies.
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