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Updated: Jun 7, 2026
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Electroconvulsive Seizures in Rats and Fractionation of Their Hippocampi to Examine Seizure-induced Changes in Postsynaptic Density Proteins
Published on: August 15, 2017
Decrease in dystrophin expression prior to disruption of brain-blood barrier within the rat piriform cortex following
Seung Hun Sheen1, Ji-Eun Kim, Hea Jin Ryu
1Department of Neurosurgery, College of Medicine, Hallym University, Chunchon 200-702, Republic of Korea.
Brain Research
|October 30, 2010
Summary
Brain-blood barrier (BBB) disruption in the piriform cortex (PC) following seizures is linked to astrocyte damage and increased vascular permeability. This leads to vasogenic edema, a key factor in epilepsy development.
Area of Science:
- Neuroscience
- Epilepsy Research
- Cerebrovascular Biology
Background:
- Increased brain-blood barrier (BBB) permeability in the piriform cortex (PC) is observed in temporal lobe epilepsy models.
- The precise mechanisms of BBB disruption during epileptogenic insults remain unclear.
Purpose of the Study:
- To investigate the association between changes in BBB-related molecules and vasogenic edema in the PC after status epilepticus (SE).
- To elucidate the role of endothelial and astroglial changes in BBB breakdown and subsequent edema formation.
Main Methods:
- Induction of status epilepticus (SE) in an animal model.
- Assessment of neuronal and astrocytic morphology (pyknotic nucleus, shrunken cytoplasm).
- Immunohistochemical analysis of BBB-related molecules: SMI-71, dystrophin, glial fibrillary acidic protein (GFAP), and glucose transporter-1 (GLUT1) at 12 hours and 1 day post-SE.
Main Results:
- Vasogenic edema, neuronal, and astrocytic damage were evident in the PC one day after SE.
- SMI-71 immunoreactivity decreased, while GLUT1 immunoreactivity increased at 12 hours and 1 day post-SE.
- Dystrophin immunoreactivity was lost in astrocytes by 12 hours post-SE, preceding edema formation; GFAP changes were minimal.
Conclusions:
- SE-induced dystrophin dysfunction in astrocytes may initiate endothelial and astroglial damage.
- This damage contributes to BBB breakdown, increased vascular permeability, and vasogenic edema.
- These processes are implicated in the pathogenesis of epileptogenesis.
