Three Cases of KCNT1 Mutations: Malignant Migrating Partial Seizures in Infancy with Massive Systemic to Pulmonary

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Yuki Kawasaki1, Ichiro Kuki2, Eiji Ehara1

  • 1Department of Pediatric Cardiology, Osaka City General Hospital, Osaka, Japan.

The Journal of Pediatrics
|October 9, 2017
PubMed

Insights

Gain-of-function KCNT1 mutations cause severe infantile epilepsy. This study links these mutations to life-threatening hemoptysis and heart failure in infants due to abnormal blood vessel development.

Area of Science:

  • Genetics
  • Neurology
  • Cardiology

Background:

  • KCNT1 gene mutations are associated with gain-of-function alterations in potassium channels.
  • These mutations are a known cause of severe early-onset epilepsy syndromes.

Observation:

  • Three infants presented with malignant migrating partial seizures.
  • These infants also exhibited massive systemic-to-pulmonary collateral arteries.
  • Life-threatening hemoptysis and heart failure were observed in these patients.

Findings:

  • The infants diagnosed with malignant migrating partial seizures carried KCNT1 mutations.
  • A strong correlation was identified between KCNT1 mutations and the development of extensive systemic-to-pulmonary collateral arteries.
  • The presence of these collateral arteries was linked to severe clinical manifestations including hemoptysis and heart failure.

Implications:

  • This research highlights a novel and severe phenotype associated with KCNT1 mutations.
  • Understanding this link is crucial for early diagnosis and management of affected infants.
  • Further research into the vascular complications of KCNT1 channelopathies is warranted.

Keywords:
epilepsygain-of-function mutationsheart failurehemoptysispotassium channel

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