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1School of Psychology, Psychiatry and Psychological Medicine, Monash University, 3800 Victoria, Australia. lucyverwey@hotmail.com
Neurobiology of Learning and Memory
|October 3, 2009
Summary
Astrocytic gap junctions are crucial for memory processing. Inhibiting these junctions with 18-alpha-glycyrrhetinic acid (alphaGA) or endothelin-1 (ET-1) impaired memory retention in a behavioral task.
Area of Science:
- Neuroscience
- Cell Biology
- Behavioral Science
Background:
- Gap junctions are vital for brain function but their role in behavior is under-investigated.
- Previous research suggests gap junctions may influence short-term memory (STM).
Purpose of the Study:
- To investigate the role of astrocytic gap junctions in memory processing.
- To determine the effects of gap junction inhibitors on memory retention.
Main Methods:
- A single trial discrimination avoidance task was employed.
- The effects of 18-alpha-glycyrrhetinic acid (alphaGA), endothelin-1 (ET-1), and tolbutamide on memory retention were assessed.
- Retention was measured at various time points post-training.
Main Results:
- Administration of alphaGA immediately post-training resulted in significant retention loss across all tested time points (10-180 min).
- Endothelin-1 (ET-1) treatment replicated the memory retention deficits observed with alphaGA.
- Tolbutamide effectively challenged the amnestic effects of ET-1, suggesting action on astrocytic gap junctions.
Conclusions:
- Astrocytic gap junctions play a significant role in memory processing.
- Inhibition of astrocytic gap junctions leads to impaired memory retention.
