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Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy
Published on: September 20, 2024
Searching for new targets for treatment of pediatric epilepsy
Yoav Noam1, Yogendra H Raol, Gregory L Holmes
1Department of Anatomy & Neurobiology, University of California-Irvine, Irvine, CA, USA.
Insights
Early life seizures are common due to immature brain development and often resist treatment. New drugs and therapeutic targets are urgently needed for pediatric seizure management.
Area of Science:
- Neuroscience
- Pediatric Neurology
- Epileptology
Background:
- Seizures disproportionately affect infants, with the highest incidence in the first year of life.
- The immature brain's susceptibility stems from an excitation-inhibition imbalance.
- While etiology is key, frequent or prolonged seizures can cause lasting harm, necessitating treatment.
Purpose of the Study:
- To review the mechanisms underlying early-life seizures.
- To explore novel molecular targets for treating pediatric seizures.
- To address the unmet need for effective antiepileptic therapies in children.
Main Methods:
- Review of existing literature on early-life seizures.
- Focus on specific mechanisms like hypoxia-ischemia.
- Identification and discussion of potential molecular targets, including hyperpolarization-activated cyclic nucleotide-gated channels.
Main Results:
- Early-life seizures are driven by specific mechanisms, including hypoxia-ischemia.
- The immature brain's neurobiology presents unique challenges for seizure control.
- Novel targets like hyperpolarization-activated cyclic nucleotide-gated channels show promise.
Conclusions:
- Effective treatment for pediatric seizures remains a significant challenge.
- Further research into novel molecular targets is crucial for developing new antiepileptic drugs.
- Addressing the mechanisms of early-life seizures is key to improving outcomes for affected children.
Abstract:
The highest incidence of seizures in humans occurs during the first year of life. The high susceptibility to seizures in neonates and infants is paralleled by animal studies showing a high propensity to seizures during early life. The immature brain is highly susceptible to seizures because of an imbalance of excitation and inhibition. While the primary outcome determinant of early-life seizures is etiology, there is evidence that seizures which are frequent or prolonged can result in long-term adverse consequences, and there is a consensus that recurrent early-life seizures should be treated. Unfortunately, seizures in many neonates and children remain refractory to therapy. There is therefore a pressing need for new seizure drugs as well as antiepileptic targets in children. In this review, we focus on mechanisms of early-life seizures, such as hypoxia-ischemia, and novel molecular targets, including the hyperpolarization-activated cyclic nucleotide-gated channels.
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Seizures: Classification
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: