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Assessment of Memory Function in Pilocarpine-induced Epileptic Mice
Published on: June 4, 2020
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Temporal changes in mouse hippocampus transcriptome after pilocarpine-induced seizures.
Evgenya Y Popova1,2, Yuka Imamura Kawasawa3,4, Ming Leung4
1Department of Neural and Behavioral Sciences, Penn State University College of Medicine, Hershey, PA, United States.
Frontiers in Neuroscience
|July 23, 2024
Summary
Status epilepticus (SE) involves prolonged seizures and can lead to epilepsy. This study tracked hippocampal gene expression changes over time after induced seizures, revealing distinct molecular responses and potential therapeutic targets.
Area of Science:
- Neuroscience
- Molecular Biology
- Genomics
Background:
- Status epilepticus (SE) is a neurological emergency with severe consequences, including epilepsy.
- Understanding the molecular mechanisms underlying SE and epileptogenesis is crucial for developing effective treatments.
Purpose of the Study:
- To investigate the temporal changes in the hippocampal transcriptome following pilocarpine-induced status epilepticus in a mouse model.
- To identify key molecular pathways and potential therapeutic targets involved in the acute and latent phases of SE.
Main Methods:
- Mice were subjected to pilocarpine-induced status epilepticus.
- Hippocampal mRNA and microRNA sequencing (mRNA-seq and microRNA-seq) were performed at multiple time points (1, 8, 36, and 120 hours) post-treatment.
Main Results:
- Early changes (1h) included upregulation of immediate early genes and pathways like IGF-1 and ERK/MAPK.
- Later stages (8h, 36h, 120h) showed shifts towards oxidative stress, inflammation, cholesterol biosynthesis, ion transport, and synaptic function.
- Novel pathways, including ferroptosis and circadian rhythms, were implicated in SE and epileptogenesis.
Conclusions:
- Temporal transcriptomic alterations reflect an immediate injury response followed by recovery and regeneration.
- CREB was identified as a key upstream regulator.
- The findings provide insights into SE's molecular landscape and suggest potential therapeutic strategies targeting specific pathways.
