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Updated: Nov 9, 2025

Systems Biology of Metabolic Regulation by Estrogen Receptor Signaling in Breast Cancer
Published on: March 17, 2016
Endocrine Therapy-related Endocrinopathies-Biology, Prevalence and Implications for the Management of Breast Cancer
Kristy A Brown1, Eleni Andreopoulou1, Panagiota Andreopoulou1
1Department of Medicine, Weill Cornell Medicine, New York, NY, USA.
Abstract:
Nearly 270,000 new breast cancer cases are predicted to be diagnosed in the USA in 2019 with more than 70% being estrogen receptor positive and treated using endocrine therapy. The suppression of estrogen biosynthesis or action via the use of ovarian suppression, aromatase inhibitors and selective estrogen receptor modulators/degraders, respectively, is effective in approximately 70% of women. The systemic inhibition of estrogen during breast cancer treatment is also associated with side effects due to the important endocrine functions of this steroid hormone, including its role in the maintenance of energy homeostasis and bone health. The current work will present perspectives of the impact of endocrine therapy from the point of view of breast medical oncology, endocrinology, and basic science.
Insights
Endocrine therapy effectively treats estrogen receptor-positive breast cancer but can cause side effects. This review explores the impact of estrogen suppression from multiple scientific perspectives.
Area of Science:
- Oncology
- Endocrinology
- Basic Science
Background:
- Nearly 270,000 new breast cancer cases in the USA (2019), with over 70% being estrogen receptor-positive.
- Endocrine therapy, targeting estrogen, is a primary treatment for estrogen receptor-positive breast cancer.
- Estrogen's vital roles in energy homeostasis and bone health necessitate careful consideration during treatment.
Purpose of the Study:
- To present a multidisciplinary perspective on the impact of endocrine therapy for breast cancer.
- To consolidate insights from breast medical oncology, endocrinology, and basic science.
Main Methods:
- Review of current perspectives on endocrine therapy in breast cancer treatment.
- Integration of knowledge from clinical and basic science research.
Main Results:
- Endocrine therapy is effective in approximately 70% of women with estrogen receptor-positive breast cancer.
- Systemic estrogen inhibition can lead to significant side effects due to estrogen's broader physiological functions.
Conclusions:
- A comprehensive understanding of endocrine therapy's impact requires integrating clinical and basic science viewpoints.
- Further research is needed to mitigate side effects while maintaining treatment efficacy.
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