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Related Concept Videos

Epilepsy and Seizures: Overview01:24

Epilepsy and Seizures: Overview

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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...
352
Seizures: Classification01:13

Seizures: Classification

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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:
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Genetic Screens02:46

Genetic Screens

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Genetic screens are tools used to identify genes and mutations responsible for phenotypes of interest. Genetic screens help identify individuals or a group of people at risk of developing  genetic diseases and help them with early intervention, targeted therapy, and reproductive options.
Forward genetic screens
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which...
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Antiepileptic Drugs: GABAergic Pathway Potentiators01:18

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γ-aminobutyric acid or GABA, plays a pivotal role as an inhibitory neurotransmitter in the brain. GABA pathway potentiators, also known as GABAergic drugs, are a class of pharmaceutical agents designed to enhance the functioning of the GABAergic system. These medications primarily treat epilepsy, a neurological disorder characterized by recurrent seizures.
The key GABA pathway potentiators used in epilepsy management are as follows.
Benzodiazepines are a well-known class of drugs used for...
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Antiepileptic Drugs: Potassium Channel Activators01:20

Antiepileptic Drugs: Potassium Channel Activators

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Ezocgabine or retigabine, an antiepileptic drug of remarkable efficacy, has revolutionized the management of seizures. It is a potassium channel activator, explicitly targeting the family of Q subtype potassium channels. It enhances the transmembrane potassium currents, regulating neuronal excitability. This action stabilizes the resting membrane potential, a pivotal factor in mitigating the hyperexcitability that characterizes epilepsy.
Ezogabine has gained approval as an adjunctive treatment...
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Related Experiment Video

Updated: Oct 10, 2025

Identification and Classification of Position-specific GABAA Receptor Subunit Missense Variants for Their Role In Hippocampal Pyramidal Neurons
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Identification and Classification of Position-specific GABAA Receptor Subunit Missense Variants for Their Role In Hippocampal Pyramidal Neurons

Published on: June 6, 2025

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Genetic testing for the epilepsies: A systematic review.

Beth R Sheidley1, Jennifer Malinowski2, Amanda L Bergner3

  • 1Epilepsy Genetics Program, Division of Epilepsy and Neurophysiology, Department of Neurology, Boston Children's Hospital, Boston, Massachusetts, USA.

Epilepsia
|December 11, 2021
PubMed
Summary

Genetic testing for epilepsy shows a 17% overall diagnostic yield, with genome sequencing (GS) yielding the highest results. This systematic review aids in optimizing testing strategies and informing clinical decisions for epilepsy patients.

Keywords:
CGH/CMAclinical and/or personal utilityexome sequencinggenome sequencingmultigene panel

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A Novel Strategy Combining Array-CGH, Whole-exome Sequencing and In Utero Electroporation in Rodents to Identify Causative Genes for Brain Malformations
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Behavioral And Physiological Analysis In A Zebrafish Model Of Epilepsy
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A Novel Strategy Combining Array-CGH, Whole-exome Sequencing and In Utero Electroporation in Rodents to Identify Causative Genes for Brain Malformations
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Behavioral And Physiological Analysis In A Zebrafish Model Of Epilepsy
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Behavioral And Physiological Analysis In A Zebrafish Model Of Epilepsy

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Area of Science:

  • Medical Genetics
  • Neurology
  • Systematic Review and Meta-Analysis

Background:

  • Epilepsy diagnosis is increasingly utilizing genetic testing, yet optimal strategies remain unclear.
  • A decade of genetic testing advancements necessitates evidence-based guidelines for epilepsy management.

Purpose of the Study:

  • To systematically review and meta-analyze the diagnostic yield of various genetic tests for epilepsy.
  • To assess non-yield outcomes (NYOs) including treatment changes and prognostic information.

Main Methods:

  • A systematic evidence review (SER) adhering to PRISMA guidelines was conducted.
  • Meta-analyses estimated diagnostic yields for genome sequencing (GS), exome sequencing (ES), multigene panels (MGP), and chromosomal microarray (CGH/CMA).
  • Non-yield outcomes were synthesized narratively.

Main Results:

  • The overall diagnostic yield across all modalities was 17%.
  • Genome sequencing (GS) demonstrated the highest diagnostic yield (48%), followed by ES (24%), MGP (19%), and CGH/CMA (9%).
  • Developmental and epileptic encephalopathy and neurodevelopmental comorbidities were associated with increased yield.

Conclusions:

  • This SER provides a comparative assessment of genetic testing yields for epilepsy, informing clinical decision-making and policy.
  • Prospective evaluation of clinical and personal utility of genetic testing in epilepsy is needed.
  • Standardization in reporting patient characteristics for genetic testing studies is crucial.