Estrogen Receptor α (ERα) and Estrogen Related Receptor α (ERRα) are both transcriptional regulators of the Runx2-I

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Investigation of the Transcriptional Role of a RUNX1 Intronic Silencer by CRISPR/Cas9 Ribonucleoprotein in Acute Myeloid Leukemia Cells
09:16

Investigation of the Transcriptional Role of a RUNX1 Intronic Silencer by CRISPR/Cas9 Ribonucleoprotein in Acute Myeloid Leukemia Cells

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Martial Kammerer1, Sabine Gutzwiller, Daniela Stauffer

  • 1Novartis Institutes for BioMedical Research, Musculoskeletal Disease Unit, CH-4002 Basel, Switzerland.

Molecular and Cellular Endocrinology
|February 14, 2013
PubMed

Insights

Estrogen Receptor alpha (ERα) and Estrogen Related Receptor alpha (ERRα) regulate Runx2-I transcription, impacting bone development and cancer. Their interaction is modulated by PGC-1 coactivators, revealing complex hormonal control.

Area of Science:

  • Molecular Biology
  • Endocrinology
  • Oncology

Background:

  • Runx2 is a key regulator of bone development and an oncogene.
  • Estrogen Receptor alpha (ERα) and Estrogen Related Receptor alpha (ERRα) are involved in bone metabolism and breast cancer.
  • ERα and ERRα share common transcriptional targets.

Purpose of the Study:

  • To investigate the regulatory roles of ERα and ERRα on Runx2-I transcription.
  • To elucidate the cross-talk between ERα and ERRα in regulating Runx2-I.
  • To understand the influence of PGC-1 coactivators on this regulatory network.

Main Methods:

  • Analysis of Runx2-I promoter activity.
  • Investigating the interaction between ERα, ERRα, and PGC-1 coactivators.
  • Reporter gene assays to assess transcriptional regulation.

Main Results:

  • ERα positively regulates Runx2-I transcription.
  • ERRα acts as an activator with PGC-1α and a repressor with PGC-1β.
  • ERα and ERRα interact on a common element in the Runx2-I promoter.
  • Estrogen influences PGC-1β, which modulates ERα and ERRα activity.

Conclusions:

  • ERα and ERRα are critical regulators of Runx2-I, with context-dependent roles influenced by PGC-1 coactivators.
  • This study reveals a novel cross-talk mechanism between ERα and ERRα impacting Runx2-I.
  • Estrogen signaling pathways provide a complex regulatory network for Runx2-I expression.

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