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Extremely low frequency magnetic fields modulate bicuculline-induced-convulsion in rats
Ji Hoon Jeong1, Kyung Bum Choi, Hee Jung Choi
1Department of Pharmacology, College of Medicine, Chung Ang University, Seoul 156-756, Korea.
Archives of Pharmacal Research
|June 25, 2005
Summary
Extremely low frequency (ELF) magnetic fields (MFs) intensified bicuculline-induced seizures in rats by altering GABA neurotransmission. MFs affected GABA levels in brain regions, suggesting a role in seizure modulation.
Area of Science:
- Neuroscience
- Biophysics
Background:
- Convulsive seizures are a neurological disorder.
- GABA is the primary inhibitory neurotransmitter in the brain.
- Extremely low frequency (ELF) magnetic fields (MFs) are ubiquitous in modern environments.
Purpose of the Study:
- To investigate the effect of ELF MFs on bicuculline-induced convulsions in rats.
- To determine if MFs alter GABA concentrations in rat brains.
Main Methods:
- Rats were exposed to bicuculline alone or co-exposed to bicuculline and 60 Hz MFs.
- Convulsion onset and duration were recorded.
- GABA concentrations in brain tissue were measured using High-Performance Liquid Chromatography with Electrochemical Detection (HPLC-ECD).
Main Results:
- MFs significantly shortened the onset and lengthened the duration of bicuculline-induced convulsions.
- Co-exposure to MFs and bicuculline decreased GABA levels in the cortex, hippocampus, and hypothalamus.
- MFs alone reduced hippocampal GABA levels.
Conclusions:
- ELF MFs can modulate the severity of bicuculline-induced seizures in rats.
- The observed effects are likely mediated by alterations in GABAergic neurotransmission.
- These findings suggest potential neurological impacts of environmental MFs.