Caffeine intoxication: Behavioral and electrocorticographic patterns in Wistar rats

Area of Science:

• Neuroscience
• Pharmacology

Background:

• Caffeine is a widely consumed psychoactive substance.
• Understanding caffeine's pro-convulsant effects is crucial for public health.
• Previous research indicates potential links between caffeine and seizure activity.

Purpose of the Study:

• To investigate the behavioral and electrocorticographic (ECoG) effects of toxic caffeine doses in rats.
• To compare caffeine-induced seizures with those induced by pentylenetetrazole.
• To evaluate the efficacy of specific antiepileptic drugs against caffeine-induced seizures.

Main Methods:

• Administered a toxic dose of caffeine (150 mg/kg) intraperitoneally to 63 rats.
• Recorded behavioral seizure patterns and ECoG.
• Compared ECoG patterns between caffeine and pentylenetetrazole-induced seizures.
• Assessed the response to diazepam, phenytoin, and phenobarbital.

Main Results:

• Caffeine induced tonic-clonic seizures with a mean latency of 365.8 seconds.
• ECoG showed seizure development with rapid evolution and burst potentials, correlating with observed behaviors.
• Caffeine-induced seizures exhibited significant ECoG differences compared to pentylenetetrazole.
• Beta-band oscillations were the predominant brain activity during seizures.
• Diazepam demonstrated anticonvulsant effects, while phenytoin and phenobarbital were ineffective.

Conclusions:

• Caffeine at toxic doses can trigger seizure-like activity in rats.
• Diazepam is effective in managing caffeine-induced seizures, suggesting a specific therapeutic pathway.
• Findings inform potential treatments for caffeine intoxication, especially in susceptible individuals.