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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

Estrogen receptor mutations and changes in downstream gene expression and signaling

Ines Barone1, Lauren Brusco, Suzanne A W Fuqua

  • 1Centro Sanitario and Department of Cellular Biology, University of Calabria, Arcavacata di Rende, Cosenza, Italy.

Clinical Cancer Research : an Official Journal of the American Association for Cancer Research
|April 30, 2010
PubMed

Insights

Variant estrogen receptors (ERalpha) contribute to endocrine therapy resistance in ERalpha-positive breast cancer. Understanding these variants and their signaling pathways is key to developing new treatment strategies.

Area of Science:

  • Oncology
  • Endocrinology
  • Molecular Biology

Background:

  • Estrogen receptor alpha (ERalpha) is crucial in ERalpha-positive breast cancer growth.
  • Standard treatments include anti-estrogens (tamoxifen) and aromatase inhibitors (letrozole, anastrozole, exemestane).
  • Resistance to endocrine therapy (de novo and acquired) limits treatment efficacy.

Purpose of the Study:

  • To review variant estrogen receptors (ERalpha) and their role in endocrine therapy resistance.
  • To explore the molecular cross-talk of variant receptors with growth factor receptors and signaling components.
  • To highlight the clinical relevance of understanding these mechanisms for novel therapeutic strategies.

Main Methods:

  • Review of scientific literature on estrogen receptor variants and endocrine resistance.
  • Analysis of molecular mechanisms, including alternative splicing and gene mutations.
  • Examination of cross-talk between ERalpha variants and signaling pathways.

Main Results:

  • Variant ERalpha forms arise from alternative splicing or gene mutations.
  • These variants contribute to both de novo and acquired resistance to endocrine therapies.
  • Molecular cross-talk with growth factor receptors and signaling pathways is implicated in resistance.

Conclusions:

  • Variant ERalpha receptors are clinically relevant in endocrine therapy resistance.
  • Understanding receptor-mediated signaling complexity offers potential for new combined therapeutic options.
  • Targeting receptor cross-talk may lead to more effective blockade strategies for ERalpha-positive breast cancer.

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