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Mechanisms of infantile epileptic spasms syndrome: What have we learned from animal models?
Andy Cheuk-Him Ng1,2, Anamika Choudhary1,2, Karlene T Barrett1,2
1Department of Pediatrics, Alberta Children's Hospital Research Institute, Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.
Insights
Infantile epileptic spasms syndrome (IESS) has many causes. Animal models are crucial for understanding IESS pathogenesis and developing new treatments for infantile spasms.
Area of Science:
- Neuroscience
- Developmental Biology
- Genetics
Background:
- Infantile epileptic spasms syndrome (IESS) is a severe developmental and epileptic encephalopathy with diverse etiologies.
- Stereotyped clinical and electrophysiologic findings suggest common underlying pathways in IESS pathogenesis.
- Identifying these pathways could reveal novel therapeutic targets for infantile spasms.
Purpose of the Study:
- To review the progress made in understanding IESS pathogenesis using animal models.
- To discuss the utility of animal models in identifying therapeutic targets for IESS.
- To explore future research directions for novel drug-resistant IESS treatments.
Main Methods:
- Review of existing literature on animal models of IESS.
- Analysis of findings from various IESS animal models.
- Synthesis of implicated molecular pathways in IESS development.
Main Results:
- Animal models have successfully recapitulated key aspects of human IESS.
- These models have implicated several distinct molecular pathways in infantile spasms.
- Previous research focused on neuroimaging and CSF analysis in human patients.
Conclusions:
- Animal models are valuable tools for investigating IESS pathogenesis.
- Further research using these models is essential for developing effective treatments for drug-resistant IESS.
- Identifying common pathways is critical for advancing IESS therapy.
Abstract:
The devastating developmental and epileptic encephalopathy of infantile epileptic spasms syndrome (IESS) has numerous causes, including, but not limited to, brain injury, metabolic, and genetic conditions. Given the stereotyped electrophysiologic, age-dependent, and clinical findings, there likely exists one or more final common pathways in the development of IESS. The identity of this final common pathway is unknown, but it may represent a novel therapeutic target for infantile spasms. Previous research on IESS has focused largely on identifying the neuroanatomic substrate using specialized neuroimaging techniques and cerebrospinal fluid analysis in human patients. Over the past three decades, several animal models of IESS were created with an aim to interrogate the underlying pathogenesis of IESS, to identify novel therapeutic targets, and to test various treatments. Each of these models have been successful at recapitulating multiple aspects of the human IESS condition. These animal models have implicated several different molecular pathways in the development of infantile spasms. In this review we outline the progress that has been made thus far using these animal models and discuss future directions to help researchers identify novel treatments for drug-resistant IESS.
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