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Estrogen Receptor Alpha and its Ubiquitination in Breast Cancer Cells

Angeles C Tecalco-Cruz1, Josué O Ramírez-Jarquín2, Eduardo Cruz-Ramos1

  • 1Instituto de Investigaciones Biomedicas. Universidad Nacional Autonoma de Mexico. Mexico City, 04510, Mexico.

Current Drug Targets
|October 17, 2018
PubMed

Insights

Ubiquitin protein (Ub) interactions with estrogen receptor alpha (ERα) impact breast cancer cell growth and endocrine therapy resistance. Understanding these Ub-dependent pathways offers new therapeutic targets for breast cancer treatment.

Area of Science:

  • Molecular Biology
  • Oncology
  • Biochemistry

Background:

  • Estrogen receptor alpha (ERα) drives proliferation in over 70% of breast cancers.
  • ERα signaling is crucial for breast cancer cell growth and endocrine therapy resistance.
  • Posttranslational modifications and protein interactions regulate ERα activity.

Purpose of the Study:

  • To investigate the role of ubiquitin protein (Ub) in modulating estrogen receptor alpha (ERα) activity in breast cancer.
  • To explore Ub-ERα interactions in the context of breast cancer progression.
  • To identify Ub-dependent pathways as potential therapeutic targets.

Main Methods:

  • Literature review focusing on ubiquitin-ERα interactions.
  • Analysis of molecular mechanisms governing ERα ubiquitination.
  • Examination of signaling pathways affected by Ub-ERα binding.

Main Results:

  • Ubiquitin can bind to ERα covalently or non-covalently.
  • These interactions lead to either proteolytic degradation or non-proteolytic functional modulation of ERα.
  • Ubiquitin-dependent pathways significantly influence ERα signaling in breast cancer cells.

Conclusions:

  • Ubiquitin conjugation plays a critical role in regulating ERα function in breast cancer.
  • Ub-ERα interactions are implicated in breast cancer progression and endocrine resistance.
  • Targeting Ub-dependent pathways modulating ERα presents a promising therapeutic strategy.
Keywords:
Estrogen receptor alphabreast cancerendocrine therapymonoubiquitinationnon-covalent ubiquitin bindingpolyubiquitination.

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