August 5, 2025

Actions of the antiseizure drug carbamazepine in the thalamic reticular nucleus: Potential mechanism of aggravating absence seizures.

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Carbamazepine increases absence seizure frequency and duration in the Scn8amed± mouse model.
Selective inhibition of tonic firing in thalamic reticular nucleus neurons was observed with carbamazepine.
GABAergic synaptic transmission is disrupted, particularly affecting somatostatin-expressing neurons.
Findings provide insights into why carbamazepine worsens absence seizures and suggest treatment optimization strategies.

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Electrophysiology shows carbamazepine exacerbates absence seizures in mice, indicating altered thalamic neuron excitability and GABA transmission.

Jang et al. (2025) studied this question.

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Electrophysiology shows carbamazepine exacerbates absence seizures in mice, indicating altered thalamic neuron excitability and GABA transmission.