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Audiogenic Epilepsy and Structural Features of Superior Colliculus in KM Rats
A V Revishchin1, G M Solus2, I I Poletaeva3
1Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334, Russia. revishchin@mail.ru.
Doklady. Biochemistry and Biophysics
|March 15, 2018
Summary
Audiogenic epilepsy (AE) prone rats have less glial neurotrophic factor (GDNF) and fewer cells in the superior colliculus (SC). These differences in the SC
Area of Science:
- Neuroscience
- Epilepsy Research
- Molecular Biology
Background:
- Audiogenic epilepsy (AE) is a neurological disorder characterized by seizures triggered by sound.
- Krushinsky-Molodkina (KM) rats are a genetic model for AE, exhibiting heightened seizure susceptibility.
- The superior colliculus (SC), a midbrain structure, plays a role in sensory processing and motor responses, potentially relevant to AE.
Purpose of the Study:
- To investigate potential differences in the superior colliculus (SC) of audiogenic epilepsy (AE) prone rats (KM strain) compared to non-prone rats ('0' strain).
- To examine the expression levels of glial neurotrophic factor (GDNF), beta-tubulin, and actin in the SC of KM and '0' rats.
- To assess the cellular structure of the SC in both rat strains using neuromorphological techniques.
Main Methods:
- Immunoblotting was used to quantify protein levels (GDNF, beta-tubulin, actin) in SC tissue.
- Neuromorphological techniques were employed to analyze the cellular composition and density of the SC.
- Comparison was made between KM rats (AE-prone) and '0' rats (non-prone).
Main Results:
- KM rats showed significantly lower levels of GDNF, beta-tubulin, and actin in the SC compared to '0' rats.
- Neuromorphological analysis revealed a significantly lower total cell number and neuron count in the SC of KM rats versus '0' rats.
- The most pronounced differences were observed in the deep layers of the SC, which receive terminals from the inferior colliculus.
Conclusions:
- The Krushinsky-Molodkina (KM) rat strain exhibits significant alterations in the superior colliculus (SC), including reduced levels of key proteins and fewer cells, particularly neurons.
- These structural and molecular differences in the SC may contribute to the audiogenic epilepsy (AE) phenotype in KM rats.
- Further investigation into midbrain structures is warranted to elucidate the neural networks involved in AE pathogenesis in KM rats.
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