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Updated: Dec 10, 2025

Systems Biology of Metabolic Regulation by Estrogen Receptor Signaling in Breast Cancer
10:36

Systems Biology of Metabolic Regulation by Estrogen Receptor Signaling in Breast Cancer

Published on: March 17, 2016

10.8K

Identification of Antiestrogen-Bound Estrogen Receptor α Interactomes in Hormone-Responsive Human Breast Cancer Cell

Valerio Gigantino1, Annamaria Salvati1, Giorgio Giurato1

  • 1Laboratory of Molecular Medicine and Genomics, Department of Medicine, Surgery and Dentistry 'Scuola Medica Salernitana', University of Salerno, Baronissi, Salerno, 84081, Italy.

Proteomics
|September 1, 2020
PubMed

Insights

Estrogen receptor alpha (ERα) interactomes were mapped using mass spectrometry. This reveals new insights into how antiestrogens control ERα function and offers strategies to overcome endocrine therapy resistance in cancer.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Endocrinology

Background:

  • Estrogen receptor alpha (ERα) is a key transcription factor in hormone-responsive tumors, targeted by therapies like Tamoxifen and Fulvestrant.
  • Understanding ERα's molecular response to different ligands is crucial for effective cancer therapy and overcoming acquired resistance.
  • Interaction proteomics offers a powerful approach to map protein-protein interactions and elucidate disease mechanisms.

Purpose of the Study:

  • To map the ERα interactomes in hormone-responsive breast cancer cells under the influence of two distinct classes of antiestrogens.
  • To gain molecular insights into how antiestrogens modulate ERα function.
  • To identify potential new strategies for overcoming endocrine therapy resistance in cancer.

Main Methods:

  • Utilized tandem affinity purification coupled with mass spectrometry (AP-MS).
  • Focused on mapping ERα protein-protein interactions within the nuclei of hormone-responsive breast cancer cells.
  • Analyzed ERα interactomes induced by two classes of antiestrogens (ERα antagonist ligands and selective estrogen receptor modulators/disruptors).

Main Results:

  • Successfully mapped the ERα interactomes in response to different antiestrogens.
  • Provided novel insights into the molecular mechanisms underlying antiestrogen-mediated ERα regulation.
  • Identified potential protein interactions that could be targeted to enhance endocrine therapy efficacy.

Conclusions:

  • The study elucidates the molecular basis of ERα control by antiestrogens.
  • Findings suggest new therapeutic avenues for overcoming endocrine resistance in breast cancer.
  • Interaction proteomics is a valuable tool for dissecting complex signaling pathways in cancer.
Keywords:
breast cancerendocrine therapyestrogen receptorinteraction proteomics

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