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Published on: July 8, 2015
Blocking SK channels impairs long-term memory formation in young chicks
Kathryn D Baker1, Thomas M Edwards, Nikki S Rickard
1School of Psychology and Psychiatry, Monash University, Clayton, 3800, Victoria, Australia. Kathryn.Baker@monash.edu
Abstract:
The role of small-conductance calcium-activated potassium (SK) channels in memory formation was explored in chicks trained on a single-trial discrimination avoidance task. Blockade of SK channels using apamin (1 nM, 0.02 ng/hem, i.c.) impaired long-term memory retention when administered between 10 min prior to, and 30 min after, training. Apamin (1 nM, 0.02 ng/hem, immediately post-training, i.c.) resulted in persistent impairment of retention during the long-term memory stage by 90 min post-training until at least 24 h post-training, indicating SK channels contribute to long-term memory.
Insights
Small-conductance calcium-activated potassium (SK) channels are crucial for memory formation. Blocking these channels with apamin significantly impairs long-term memory retention in chicks.
Area of Science:
- Neuroscience
- Molecular Biology
- Behavioral Science
Background:
- Small-conductance calcium-activated potassium (SK) channels are involved in neuronal excitability.
- Memory formation is a complex process involving synaptic plasticity and molecular changes.
Purpose of the Study:
- To investigate the role of SK channels in the formation and retention of long-term memory.
- To determine the temporal window for SK channel involvement in memory consolidation.
Main Methods:
- Chicks were trained on a single-trial discrimination avoidance task.
- SK channels were blocked using apamin (1 nM, 0.02 ng/hem, intracerebroventricularly).
- Memory retention was assessed at various time points post-training.
Main Results:
- Apamin administration between 10 minutes prior to and 30 minutes after training impaired long-term memory retention.
- Immediate post-training administration of apamin led to persistent memory impairment from 90 minutes to at least 24 hours post-training.
Conclusions:
- SK channels play a critical role in the consolidation and retention of long-term memory.
- The findings highlight SK channels as potential therapeutic targets for memory-related disorders.
