1. Transcranial focal electrical stimulation reduces seizure activity and hippocampal glutamate release during status epilepticus
- Author
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Michael Tamayo, Víctor Manuel Magdaleno-Madrigal, Luisa Rocha, César Emmanuel Santana-Gómez, Ivette Bañuelos-Cabrera, Hiram Luna-Munguia, Walter G. Besio, and David Alcantara-Gonzalez
- Subjects
medicine.medical_specialty ,Transcranial direct-current stimulation ,Chemistry ,medicine.medical_treatment ,Pilocarpine ,Glutamate receptor ,Glutamic Acid ,Hippocampus ,Stimulation ,Status epilepticus ,Hippocampal formation ,Transcranial Direct Current Stimulation ,Neuroprotection ,Rats ,Status Epilepticus ,Endocrinology ,Internal medicine ,medicine ,Animals ,medicine.symptom ,Neuroscience ,gamma-Aminobutyric Acid ,medicine.drug - Abstract
Previously we demonstrated that noninvasive transcranial focal electrical stimulation (TFS) with sub-effective doses of diazepam reduces status epilepticus (SE)-induced neuronal damage. However, it was unclear if this neuroprotective effect is a consequence of the decrease in the glutamate release. The aim of the present study was to evaluate the effects of TFS on γ-Aminobutyric acid (GABA) and glutamate release in the hippocampus during pilocarpine-induced SE. After pilocarpine administration, the rats showed progressive behavioral changes that culminated in SE with a significant increase of GABA and glutamate (95 and 128% respectively), even more evident at the end of the experiment (120 and 182% respectively), 5 hours after pilocarpine injection and was associated with the prevalence of high-voltage rhythmic spikes and increased spectral power in the 4-90 Hz bands. The TFS application during the SE decreased the convulsive expression, the prevalence of high-voltage rhythmic spikes and spectral power in 4-8 Hz and 30-90 Hz bands. These effects were associated with lower release of GABA and glutamate in the hippocampus. These results support the anticonvulsive and neuroprotective effects induced by TFS.
- Published
- 2015
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