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Infantile Spasms: An Update on Pre-Clinical Models and EEG Mechanisms
Remi Janicot1, Li-Rong Shao1, Carl E Stafstrom1
1Division of Pediatric Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
Insights
Infantile spasms (IS) are a severe epilepsy syndrome in infants. Understanding the neurobiology of IS through preclinical models is crucial for developing effective treatments for this catastrophic condition.
Area of Science:
- Pediatric Neurology
- Epileptology
- Neuroscience
Background:
- Infantile spasms (IS) is a severe epileptic encephalopathy affecting infants.
- The pathophysiology of IS is poorly understood, despite over 200 known etiologies.
- The convergence of diverse etiologies to a similar clinical presentation remains unexplained.
Purpose of the Study:
- To review existing and novel preclinical models of Infantile Spasms.
- To advance the understanding of IS pathophysiology and neurobiology.
- To explore cellular mechanisms behind IS electrographic features.
Main Methods:
- Review of current preclinical models for Infantile Spasms.
- Description of novel preclinical models.
- Analysis of new data on cellular mechanisms in IS.
Main Results:
- Existing preclinical models provide insights into IS.
- Novel models are emerging to better represent IS heterogeneity.
- New data sheds light on the cellular basis of IS EEG patterns.
Conclusions:
- Preclinical models are essential for advancing knowledge of Infantile Spasms.
- Further research into IS pathophysiology is needed for novel treatment development.
- Understanding cellular mechanisms can improve therapeutic strategies for IS.
Abstract:
Infantile spasms (IS) is an epileptic encephalopathy with unique clinical and electrographic features, which affects children in the middle of the first year of life. The pathophysiology of IS remains incompletely understood, despite the heterogeneity of IS etiologies, more than 200 of which are known. In particular, the neurobiological basis of why multiple etiologies converge to a relatively similar clinical presentation has defied explanation. Treatment options for this form of epilepsy, which has been described as "catastrophic" because of the poor cognitive, developmental, and epileptic prognosis, are limited and not fully effective. Until the pathophysiology of IS is better clarified, novel treatments will not be forthcoming, and preclinical (animal) models are essential for advancing this knowledge. Here, we review preclinical IS models, update information regarding already existing models, describe some novel models, and discuss exciting new data that promises to advance understanding of the cellular mechanisms underlying the specific EEG changes seen in IS-interictal hypsarrhythmia and ictal electrodecrement.
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