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Investigation of Synaptic Tagging/Capture and Cross-capture using Acute Hippocampal Slices from Rodents
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Behavioral tagging and capture: long-term memory decline in middle-aged rats.
Alexandra Gros1, Szu-Han Wang2
1Centre for Clinical Brain Sciences, The University of Edinburgh, Edinburgh, Scotland, UK.
Neurobiology of Aging
|April 3, 2018
Summary
Early aging impairs memory persistence mechanisms like behavioral tagging and capture (BTC). However, memory reactivation can restore long-term memory in middle-aged rats, suggesting a weakened but not absent plasticity.
Area of Science:
- Neuroscience
- Cognitive Aging
- Memory Research
Background:
- Cognitive decline, including spatial memory loss, is typical in later aging.
- The impact of early-stage aging on memory persistence modulation is understudied.
- Behavioral tagging and capture (BTC) enhances memory persistence in young animals via novelty.
Purpose of the Study:
- To investigate how early aging (10-13 months) affects BTC in spatial memory.
- To determine if memory reactivation can enhance memory persistence in aging rats.
Main Methods:
- An appetitive delayed-matching-to-place task was used to train young and middle-aged rats.
- Spatial novelty was introduced during memory encoding to test BTC.
- Memory reactivation was employed after learning to assess its effect on persistence.
Main Results:
- Novelty enhanced long-term memory persistence in young rats but not in middle-aged rats.
- Re-exposure to the learning environment (reactivation) improved memory persistence in middle-aged rats.
- Combined BTC and reactivation facilitated memory persistence through reconsolidation in aging rats.
Conclusions:
- Early aging weakens the behavioral tagging and capture (BTC) mechanism.
- Memory reactivation can overcome age-related deficits in memory persistence.
- Impaired BTC occurs before significant reductions in plasticity-related proteins in early aging.
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