Lipopolysaccharide potentiates hyperthermia-induced seizures

Area of Science:

• Neuroscience
• Immunology
• Pediatrics

Background:

• Prolonged febrile seizures (FS) impact the developing brain.
• FS are often linked to peripheral infections.
• A need exists for preclinical models simulating fever and immune activation for targeted FS therapy.

Purpose of the Study:

• To develop a clinically relevant preclinical model of prolonged febrile seizures (FS).
• To investigate the synergistic effects of fever and peripheral inflammation on seizure activity.
• To assess seizure-induced immune responses in the developed model.

Main Methods:

• Administered lipopolysaccharide (LPS) to rat and mouse pups prior to hyperthermic seizures (HT).
• Quantified seizure latency, temperature threshold, and seizure frequency.
• Correlated behavioral seizures with EEG, assessed cytokine production, and quantified microglial activation.

Main Results:

• LPS priming increased susceptibility to hyperthermic seizures in rodents.
• Enhanced seizure-induced proinflammatory cytokine production was observed.
• Increased microglial activation in the hippocampus was detected.

Conclusions:

• Peripheral inflammation and hyperthermia act synergistically to potentiate seizures.
• The developed model simulates fever from immune challenges, offering clinical relevance for prolonged FS.
• This model facilitates research into targeted therapies for FS.