Unknown

Dataset Information

0

Anticonvulsant effect of BmK IT2, a sodium channel-specific neurotoxin, in rat models of epilepsy.


ABSTRACT: BACKGROUND AND PURPOSE: The sodium channel is a primary target for treating central nervous system disorders such as epilepsy. In this study the anticonvulsant effect of BmK IT2, a sodium channel-specific neurotoxin, was evaluated in different animal models of epilepsy. EXPERIMENTAL APPROACH: Experiments were performed on freely moving rats made epileptic by administration of either pentylenetetrazole (PTZ) or pilocarpine. BmK IT2 (0.05-0.5 microg in 2 microl) was microinjected into the CA1 area and its effects on PTZ-induced widespread, seizure-like behaviour and cortex epileptiform EEG, as well as on pilocarpine-induced seizure-like behaviour and c-Fos expression were studied. KEY RESULTS: Intrahippocampal application of BmK IT2 dose-dependently inhibited PTZ-induced seizure-like behaviour, and reduced the numbers and duration of the high amplitude and frequency discharges (HAFDs) of the epileptiform EEG component induced by PTZ. Similarly, in the pilocarpine-induced status epilepticus (SE) model, BmK IT2 significantly prolonged the latency to onset of the SE, reduced the severity of SE and suppressed hippocampal c-Fos expression during SE. CONCLUSIONS AND IMPLICATIONS: BmK IT2 showed anticonvulsant activity as it inhibited the widespread seizures induced by PTZ and pilocarpine-induced SE in rats. This activity might be due to the modulation of sodium channels in the hippocampus. Hence, BmK IT2 could be used as a novel tool to explore the molecular and pathological mechanisms of epilepsy with regard to the involvement of sodium channels.

PROVIDER: S-EPMC2451059 | BioStudies | 2008-01-01

REPOSITORIES: biostudies

Similar Datasets

| S-EPMC6974466 | BioStudies
2012-01-01 | S-EPMC3525866 | BioStudies
| S-EPMC5131616 | BioStudies
| S-EPMC8551917 | BioStudies
| S-EPMC6281169 | BioStudies
| S-EPMC3021515 | BioStudies
| S-EPMC3253224 | BioStudies
| S-EPMC6493164 | BioStudies
| S-EPMC8390750 | BioStudies
2017-01-01 | S-EPMC5425926 | BioStudies