Related Experiment Video

Updated: Jun 25, 2026

A Behavioral Screen for Heat-Induced Seizures in Mouse Models of Epilepsy
06:58

A Behavioral Screen for Heat-Induced Seizures in Mouse Models of Epilepsy

Published on: July 12, 2021

The role of interleukin-1beta in febrile seizures

James G Heida1, Solomon L Moshé, Quentin J Pittman

  • 1The Saul R. Korey Department of Neurology, Laboratory of Developmental Epilepsy, The Montefiore/Einstein Epilepsy Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA. heida@medicine.tamhsc.edu

Brain & Development
|February 17, 2009
PubMed

Insights

Interleukin-1beta (IL-1beta) plays a key role in fever-induced seizures (FS) in children. This pro-inflammatory cytokine increases seizure susceptibility, while its antagonist, IL-1ra, offers protection.

Area of Science:

  • Neuroscience
  • Immunology
  • Pediatrics

Background:

  • Febrile seizures (FS) are common in children but their underlying mechanisms are not fully understood.
  • Emerging research suggests immune factors, particularly cytokines, may contribute to FS development.
  • Interleukin-1beta (IL-1beta) and its antagonist, interleukin 1 receptor antagonist (IL-1ra), are key players in neuroinflammation.

Purpose of the Study:

  • To investigate the role of the IL-1beta/IL-1ra system in the development of FS using a novel animal model.
  • To determine if IL-1beta levels are altered in animals experiencing FS.
  • To assess the effects of administering IL-1beta and IL-1ra on seizure susceptibility.

Main Methods:

  • A physiological fever model was used in animals to induce FS.
  • Hippocampal and hypothalamic IL-1beta and IL-1ra levels were measured in animals with and without FS.
  • Intracerebroventricular (ICV) administration of IL-1beta and IL-1ra was performed to evaluate their effects on seizure occurrence.

Main Results:

  • Animals experiencing FS showed elevated IL-1beta levels in the hippocampus and hypothalamus, with hippocampal increases noted at seizure onset.
  • No significant differences in IL-1ra levels were observed between groups.
  • ICV administration of IL-1beta increased the incidence of FS, whereas IL-1ra demonstrated an anti-convulsant effect.

Conclusions:

  • The IL-1beta/IL-1ra system is implicated in the pathophysiology of FS.
  • Elevated IL-1beta appears to promote seizure generation, while IL-1ra may offer neuroprotection.
  • These findings support a critical role for neuroinflammation in the development of febrile seizures.

More Related Videos

Accurate and Simple Measurement of the Pro-inflammatory Cytokine IL-1β using a Whole Blood Stimulation Assay06:29

Accurate and Simple Measurement of the Pro-inflammatory Cytokine IL-1β using a Whole Blood Stimulation Assay

Published on: March 1, 2011

Behavioral Characterization of Pentylenetetrazole-induced Seizures: Moving Beyond the Racine Scale07:35

Behavioral Characterization of Pentylenetetrazole-induced Seizures: Moving Beyond the Racine Scale

Published on: July 8, 2025

Related Concept Videos

Increased Body Temperature01:25

Increased Body Temperature

A body temperature above  38°C  (100.4 °F) is known as fever or pyrexia, and a person with fever is termed 'febrile.' Typically, the hypothalamus, a part of the brain that acts as the body's thermostat, regulates body temperature through a thermoregulatory setpoint. It receives signals from cold and warm thermal receptors throughout the body and adjusts the body's temperature accordingly. Fever occurs when this hypothalamic setpoint is altered, usually in response to an infection or illness.
Seizures l: Introduction01:20

Seizures l: Introduction

Understanding seizures and epilepsy relies on key definitions that help in recognizing, classifying, and managing these disorders. These definitions provide a framework for recognizing, classifying, and managing seizure disorders.DefinitionsA seizure is a sudden, abnormal burst of electrical activity in the brain that can cause changes in awareness, movement, sensation, or behavior, depending on the area involved. Epilepsy is a chronic condition characterized by recurrent, unprovoked seizures,...
Encephalitis l: Introduction01:19

Encephalitis l: Introduction

Encephalitis is inflammation of the brain parenchyma, most often due to infections or autoimmune processes. It presents with neuropsychiatric features such as fever, altered mental status, behavioral changes, cognitive dysfunction, seizures, focal deficits, and sometimes autonomic instability. In some cases, the meninges are also involved, resulting in meningoencephalitis.Infectious CausesInfectious encephalitis is most commonly viral but can also result from bacterial, fungal, or parasitic...
Seizures: Classification01:13

Seizures: Classification

Epilepsy is primarily characterized by unpredictable seizures, either provoked by an identifiable factor, such as injury or illness, or unprovoked, occurring spontaneously without apparent cause.
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:
Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein01:20

Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein

Antiepileptic drugs, such as levetiracetam (Keppra) and brivaracetam (Briviact), have emerged as crucial tools in managing epilepsy. These medications exert their therapeutic effects by targeting the synaptic vesicle protein SV2A, a transmembrane glycoprotein primarily found in the brain.
SV2A is a transmembrane glycoprotein located predominantly in the brain, modulating the release of neurotransmitters for neuronal communication. Both levetiracetam and brivaracetam exhibit a high affinity for...
Epilepsy and Seizures: Overview01:24

Epilepsy and Seizures: Overview

Epilepsy is a chronic neurological disease marked by recurrent, unpredictable seizures. These seizures are caused by abnormal electrical discharges in the brain, leading to behavior, sensation, or consciousness alterations. They can also cause transient impairment of awareness, interfering with daily activities.
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...