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Published on: January 29, 2018
Clinical and Genetic Characteristics of KCNT1-Related Epilepsy in Infancy
Fatema K1, Akhter Ku1, Alam St1
1Department of Pediatric Neurology, Bangladesh Medical University, Dhaka, Bangladesh.
Insights
Mutations in the KCNT1 gene are linked to infant epilepsy. This study details the genetic and clinical features of KCNT1-related epilepsies in infants, aiding diagnosis and understanding.
Area of Science:
- Genetics
- Neurology
- Pediatrics
Background:
- KCNT1 gene encodes sodium-gated potassium channels.
- KCNT1 mutations are associated with various epilepsies and neurological disorders.
- Infantile epilepsy presents a significant diagnostic and therapeutic challenge.
Purpose of the Study:
- To provide an overview of the phenotype and genotype of KCNT1-related epilepsies in infancy.
- To characterize seizure types and developmental outcomes in affected infants.
- To highlight the role of genetic testing in diagnosing KCNT1-related epilepsy.
Main Methods:
- Observational, cross-sectional study.
- Inclusion of six pediatric patients with suspected KCNT1 mutations.
- Utilized electroencephalogram (EEG), magnetic resonance imaging (MRI), and targeted next-generation sequencing (NGS) for genetic analysis.
Main Results:
- Identified KCNT1 gene mutations in all six patients with developmental epileptic encephalopathy.
- Observed diverse seizure types including focal seizures, focal with bilateral tonic-clonic seizures, epileptic spasms, and status epilepticus.
- Most patients presented with global developmental delay and normal birth histories.
Conclusions:
- KCNT1 mutations are a significant cause of infantile epilepsy.
- Detailed genotype-phenotype correlation is crucial for understanding KCNT1-related epilepsy.
- Early genetic diagnosis facilitates appropriate management and counseling for affected families.
Background And Purpose:
KCNT1, a gene which encodes sodium gated potassium channels, is associated with a spectrum of epilepsies and neurological disorders. This study has been done to overview the phenotype and genotype of KCNT1 related epilepsies in infancy.
Method:
This observational, cross-sectional study was conducted in the Department of Pediatric Neurology, Bangladesh Medical University. Detailed history taking and clinical examinations were done. Electroencephalogram and magnetic resonance imaging of the brain were done in each patient. The classification and description of seizures and epilepsy was done according to the international league against epilepsy guideline. Genetic test was done by targeted next-generation sequencing.
Result:
This study included six patients with developmental epileptic encephalopathy with KCNT1 gene mutation. The children had various types of seizures, mostly focal seizure, focal with bilateral tonic-clonic seizure, epileptic spasm and status epilepticus. Most patients had global developmental delay with normal birth history. In all patients, whole exome sequencing was done and KCNT1 mutation had been found.
Conclusions:
This study describes the genotype and phenotype of KCNT1 related epilepsy in infancy.
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