Berberine attenuates convulsing behavior and extracellular glutamate and aspartate changes in ۴-aminopyridine treated rats

سال انتشار: 1396
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 156

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شناسه ملی سند علمی:

JR_IJBMS-20-5_016

تاریخ نمایه سازی: 28 مهر 1400

چکیده مقاله:

Objective(s): K+ channel blocker ۴-aminopyridine (۴-AP) stimulates the release of glutamate from nerve terminals and induces seizures. Berberine as a potential herbal drug exerts several pharmacological actions on the central nervous system including anxiolytic, anticonvulsant, and neuroprotective properties. The present study aimed to investigate the effect of berberine on seizure onset and time course of the extracellular levels of excitatory amino acids (EAA), glutamate and aspartate, changes produced by ۴-AP in rat hippocampus. Materials and Methods: The rats were given either saline or berberine (۵۰, ۱۰۰ and ۲۰۰ mg/kg, IP) ۴۰ min before administration of ۴-AP (۱۵ mg/kg, IP) and the onset of seizure was recorded. A group of rats also received diazepam (DZP, ۱۵ mg/kg, IP) ۲۰ min prior to ۴-AP administration. Hippocampal extracellular levels of EAA were also measured using microdialysis assay. Analysis of the dialysate samples was performed by reversed-phase high performance liquid chromatography (HPLC) with precolumn derivatization with o-phthaldialdehyde and fluorescence detection. Results: Our findings suggest that berberine significantly delayed the seizure onset following ۴-AP injection. There was a considerable increase in the extracellular glutamate and aspartate levels in ۴-AP treated rats and ۴-AP-evoked release of EAA was sharply reduced (about ۴-۵ fold especially at ۲۰ min after ۴-AP administration) in berberine treatment groups. Conclusion: The results of present study show that berberine attenuates ۴-AP induced seizures by decreasing hippocampal aspartate and glutamate release in rats.

نویسندگان

Hamid Reza Sadeghnia

Neurocognitive Research Center, Mashhad University of Medical Sciences, Mashhad, Iran

Ali Reza Taji

Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran

Fatemeh Forouzanfar

Neurocognitive Research Center, Mashhad University of Medical Sciences, Mashhad, Iran

Hossein Hosseinzadeh

Pharmaceutical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran

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