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Updated: Jun 1, 2025

Systems Biology of Metabolic Regulation by Estrogen Receptor Signaling in Breast Cancer
Published on: March 17, 2016
Targeting Oestrogen Receptor Signalling in Breast Cancer Therapy
Sacha J Howell1,2,3, Anthony Howell4,5,6
1Division of Cancer Sciences, University of Manchester, Manchester, UK. sacha.howell@nhs.net.
Abstract:
There has been over 130 years of research into the treatment of breast cancer using approaches that target oestrogen receptor signalling. Here, we summarise the development of the key pillars of such endocrine therapy, namely, oestrogen deprivation, achieved through ovarian suppression and/or aromatase inhibition, and oestrogen receptor blockade, through selective oestrogen receptor modulators, downregulators and novel compounds entering early phase development. The translation of these compounds from advanced to early breast cancer settings is discussed with a focus on the placebo-controlled breast cancer prevention studies to most accurately describe the side effect profiles of the main approaches.
Insights
For over 130 years, endocrine therapies for breast cancer have evolved, targeting oestrogen receptor signalling. This review covers oestrogen deprivation and receptor blockade strategies, including their translation to early breast cancer prevention.
Area of Science:
- Oncology
- Endocrinology
- Pharmacology
Background:
- Breast cancer treatment has a 130-year history of targeting oestrogen receptor signalling.
- Endocrine therapy remains a cornerstone in managing oestrogen receptor-positive breast cancer.
Purpose of the Study:
- To summarise the development of key endocrine therapy pillars for breast cancer.
- To discuss the translation of these therapies from advanced to early breast cancer settings.
Main Methods:
- Review of oestrogen deprivation strategies (ovarian suppression, aromatase inhibition).
- Review of oestrogen receptor blockade strategies (SERMs, SERDs, novel compounds).
- Analysis of placebo-controlled breast cancer prevention studies for side effect profiles.
Main Results:
- Key endocrine therapy pillars include oestrogen deprivation and receptor blockade.
- Novel compounds are entering early phase development for breast cancer treatment.
- Prevention studies provide accurate side effect profiles for these approaches.
Conclusions:
- Endocrine therapy has significantly advanced over 130 years.
- The translation to early breast cancer settings is crucial for prevention.
- Understanding side effect profiles is vital for patient management and therapy selection.
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