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Developing an animal model for infantile spasms: pathogenesis, problems and progress
Eric D Marsh1, Jeffrey A Golden
1Department of Neurology, Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA. marshe@email.chop.edu
Insights
Infantile spasms (IS), a common childhood epilepsy, causes significant disability. Research is needed to understand its biological basis and develop effective treatments using appropriate animal models.
Area of Science:
- Pediatric Neurology
- Epileptology
- Developmental Neuroscience
Background:
- Infantile spasms (IS), also known as West syndrome, is the most prevalent early epileptic encephalopathy.
- It is characterized by severe seizures, developmental delays, and a distinct EEG pattern, often progressing to Lennox-Gastaut syndrome.
- IS leads to lifelong epilepsy and intellectual disability, with its underlying biological mechanisms poorly understood.
Purpose of the Study:
- To review the clinical features and diverse etiologies of infantile spasms.
- To define the ideal characteristics for animal models of IS.
- To evaluate existing IS models and identify future research directions.
Main Methods:
- Literature review of clinical presentations and causes of IS.
- Analysis of criteria for effective IS modeling.
- Assessment of current animal models for IS research.
Main Results:
- IS presents with intractable seizures and poor developmental outcomes, impacting thousands of children annually.
- Diverse etiologies likely converge on a common pathway, necessitating specific models for study.
- Existing models are discussed concerning their limitations and potential for advancing IS research.
Conclusions:
- Understanding the biological basis of IS is crucial for developing targeted therapies.
- Appropriate animal models are essential for investigating infantile spasms' susceptibility in early childhood and cognitive deficits.
- Further research and improved models are needed to address the significant disability associated with IS.
Abstract:
Infantile spasms (IS), the most common of the early epileptic encephalopathies, afflicts thousands of children each year and results in significant disability. Also known as West syndrome, IS is characterized by intractable stereotyped seizures, poor developmental outcome and a characteristic electroencephalogram (EEG) pattern. IS often progresses into another epileptic encephalopathy known as Lennox-Gastaut syndrome, and continues with the patient being burdened by lifelong epilepsy and varying degrees of mental retardation. Little is known about the biological basis of IS. As the etiologies of IS are diverse, the multiple causes must converge into a final common pathway that results in this specific epilepsy phenotype. Finding a model or models to test this final pathway is necessary both to understand why the greatest susceptibility to seizure development occurs during infancy and early childhood, and what underlies the decreased cognitive potential associated with IS. Furthermore, appropriate models would permit better testing of potential therapies directed specifically at IS. This review will describe the clinical features and etiologies of IS; the ideal features that IS models should contain; and the IS models that exist currently. Finally, we will discuss the limitations of these models and the potential avenues for future research on IS.
