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Related Experiment Video

Updated: Jun 8, 2026

Detecting the Ligand-binding Domain Dimerization Activity of Estrogen Receptor Alpha Using the Mammalian Two-Hybrid Assay
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Published on: December 19, 2018

Estrogen receptor ß activity modulates synaptic signaling and structure.

Deepak P Srivastava1, Kevin M Woolfrey, Feng Liu

  • 1Department of Physiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, USA. d-srivastava@northwestern.edu

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|October 8, 2010
PubMed
Summary

Estrogen receptor β (ERβ) rapidly influences brain function by increasing dendritic spine density in cortical neurons. This occurs through a pathway involving p21-activated kinase (PAK) and extracellular signal-regulated kinase 1/2 (ERK1/2).

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Cell Biology

Background:

  • Brain-synthesized estrogen impacts synaptic structure, cognitive function, and neuronal processes.
  • Estrogen receptor β (ERβ) is present in cortical neurons and is crucial for cognitive functions.
  • The rapid molecular mechanisms of estrogen's effects on cortical dendritic spines remain unclear.

Purpose of the Study:

  • To investigate the rapid effects of ERβ signaling on dendritic spines in cortical neurons.
  • To identify the molecular pathways initiated by ERβ activation in the cortex.
  • To explore the role of brain-synthesized estrogen as a neuromodulator.

Main Methods:

  • Activation of ERβ using the specific agonist WAY-200070 in cultured cortical neurons.
  • Analysis of dendritic spine density and postsynaptic density-95 (PSD-95) accumulation.
  • Measurement of p21-activated kinase (PAK) and extracellular signal-regulated kinase 1/2 (ERK1/2) phosphorylation.
  • Localization of aromatase in presynaptic termini.

Main Results:

  • WAY-200070 activation of ERβ increased dendritic spine density and PSD-95 accumulation.
  • ERβ activation led to increased phosphorylation of PAK and ERK1/2.
  • Aromatase was detected at presynaptic termini, supporting brain estrogen synthesis.

Conclusions:

  • ERβ signaling controls dendritic spine morphology in cortical neurons.
  • A PAK/ERK1/2-dependent pathway mediates these rapid cellular effects of estrogen.
  • Brain-synthesized estrogen acts as a neuromodulator in the cortex via ERβ.