[Cyclic AMP responsive element- and activator protein 1 DNA-binding activities in epilepsy model mice]

Area of Science:

• Neuroscience
• Molecular Biology
• Epilepsy Research

Context:

• Convulsive seizures are known to activate transcription factors like AP-1 in the brain.
• Previous studies indicated elevated AP-1 binding in absence seizures.
• The specific brain regions and transcription factors involved in convulsive seizures require further characterization.

Purpose:

• To investigate the correlation between convulsive seizures and inducible transcription factors.
• To determine the regional changes in AP-1 and CRE DNA-binding activities following different types of seizures.
• To differentiate the molecular responses to convulsive versus absence seizures.

Summary:

• Convulsive seizures induced by pentylentetrazole, kainic acid, and maximal electric shock (MES) increased AP-1 and CRE DNA-binding activities in the cerebral cortex and hippocampus.
• These increases were not observed in other brain regions.
• The anticonvulsant sodium phenobarbital suppressed both MES-induced seizures and the associated increases in DNA-binding activities, while ethosuximide did not.
• These findings suggest that convulsive seizures specifically enhance AP-1 and CRE binding in the cortex and hippocampus.

Impact:

• The study highlights regional differences in transcription factor activation between convulsive and absence seizures.
• This suggests distinct neural pathways are involved in the generation and spread of different seizure types.
• Provides insights into the molecular mechanisms underlying seizure-induced brain activity.