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Autophagy Enhances Memory Erasure through Synaptic Destabilization.

Mohammad Shehata1,2, Kareem Abdou3,2, Kiriko Choko3,2

  • 1Department of Biochemistry, Graduate School of Medicine and Pharmaceutical Sciences, inokuchi@med.u-toyama.ac.jp mohammad.shehata@gmail.com.

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PubMed
Summary
This summary is machine-generated.

Inducing autophagy enhances memory destabilization and overcomes reconsolidation resistance in fear memories. This suggests autophagy inducers may treat anxiety disorders by targeting synaptic protein degradation.

Keywords:
AMPA receptorsNMDA receptorslong-term potentiationpost-traumatic stress disorderprotein degradationreconsolidation

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Pharmacology

Background:

  • Memory reconsolidation is a therapeutic target for anxiety disorders like PTSD.
  • Reconsolidation resistance limits therapeutic applications due to constrained memory destabilization.
  • Synaptic protein degradation's role in memory destabilization remains unclear.

Purpose of the Study:

  • Investigate if autophagy modulation enhances memory destabilization upon retrieval.
  • Determine if autophagy can overcome reconsolidation-resistant memory conditions.
  • Explore autophagy's potential as a therapeutic strategy for anxiety disorders.

Main Methods:

  • Utilized auditory and contextual fear reconsolidation models in male mice.
  • Employed an in vivo long-term potentiation (LTP) reconsolidation model in male rats.
  • Assessed memory destabilization, synaptic changes, and protein degradation pathways (autophagy, AMPAR, NMDAR).

Main Results:

  • Autophagy induction enhanced memory destabilization in auditory and contextual fear models.
  • Autophagy facilitated the erasure of reconsolidation-resistant fear memories dependent on AMPAR endocytosis.
  • Autophagy induction promoted synaptic destabilization in an NMDAR-dependent manner in LTP models.

Conclusions:

  • Inducing synaptic protein degradation via autophagy enhances memory and synaptic destabilization.
  • Autophagy induction can overcome reconsolidation resistance in fear memories.
  • Autophagy inducers show potential as therapeutic agents for anxiety disorders.