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Related Experiment Video

Updated: May 29, 2026

Ex Vivo Optogenetic Dissection of Fear Circuits in Brain Slices
11:13

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Published on: April 5, 2016

Wnt signaling in amygdala-dependent learning and memory.

Kimberly A Maguschak1, Kerry J Ressler

  • 1Department of Psychiatry and Behavioral Sciences, Yerkes National Primate Research Center, Emory University, Atlanta, Georgia 30329, USA.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|September 16, 2011
PubMed
Summary

Wnt/β-catenin pathway modulation is crucial for forming long-term fear memories in the amygdala. Disrupting this signaling prevents memory consolidation without affecting initial learning or expression.

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Last Updated: May 29, 2026

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Published on: April 5, 2016

Trace Fear Conditioning in Mice
07:02

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Combined Optogenetic and Freeze-fracture Replica Immunolabeling to Examine Input-specific Arrangement of Glutamate Receptors in the Mouse Amygdala
09:49

Combined Optogenetic and Freeze-fracture Replica Immunolabeling to Examine Input-specific Arrangement of Glutamate Receptors in the Mouse Amygdala

Published on: April 15, 2016

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Synaptic Plasticity

Background:

  • The Wnt/β-catenin pathway is known for its roles in development and proliferation.
  • Emerging in vitro data suggest its involvement in synaptic plasticity.
  • In vivo evidence for Wnt signaling's role in learning and memory is lacking.

Purpose of the Study:

  • To investigate the necessity of Wnt signaling activity for in vivo learning and memory formation.
  • To examine the dynamic regulation of Wnt signaling genes in the amygdala during fear memory formation.

Main Methods:

  • Quantitative PCR and in situ hybridization to confirm Wnt mRNA regulation.
  • Stereotactic injection of Wnt signaling modulators (Dkk-1 antagonist, Wnt1 agonist) into the adult amygdala.
  • Behavioral analysis of locomotion, anxiety, fear acquisition, expression, and memory consolidation.

Main Results:

  • Wnt signaling genes showed dynamic regulation in the amygdala during fear memory consolidation.
  • Neither Wnt antagonist nor agonist affected locomotion, anxiety, fear acquisition, or expression.
  • Both Wnt modulators blocked long-term fear memory consolidation but not short-term memory.

Conclusions:

  • Dynamic modulation of the Wnt/β-catenin pathway during memory consolidation is critical for the structural basis of long-term memory.
  • Wnt signaling's role extends beyond development to include the formation of lasting memories.