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DYNC1H1-related epilepsy: Genotype-phenotype correlation.

Wenwei Liu1, Miaomiao Cheng1, Ying Zhu2

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|September 29, 2022
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Summary
This summary is machine-generated.

DYNC1H1 variants are linked to epilepsy, often presenting as West syndrome and malformations of cortical development. Continuous spikes and waves during slow sleep (CSWS) may be a new phenotype.

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Area of Science:

  • Neurogenetics
  • Epileptology
  • Developmental Neuroscience

Background:

  • DYNC1H1 gene mutations are associated with neurological disorders, including epilepsy.
  • Understanding the genotype-phenotype correlation is crucial for diagnosing and managing DYNC1H1-related epilepsy.

Purpose of the Study:

  • To delineate the phenotypic spectrum of epilepsy associated with DYNC1H1 variants.
  • To refine the genotype-phenotype correlation in DYNC1H1-related epilepsy.
  • To identify potential new phenotypes associated with DYNC1H1 variants.

Main Methods:

  • Retrospective analysis of clinical data from 15 patients with epilepsy and DYNC1H1 variants in a single cohort.
  • Systematic review and meta-analysis of 50 additional patients from 24 published studies.
  • Evaluation of seizure types, developmental outcomes, neuroimaging findings, and genetic variant locations.

Main Results:

  • Epilepsy was identified in nearly 40% of individuals with DYNC1H1 variants.
  • Common phenotypes included multiple seizure types (epileptic spasms, focal, tonic, myoclonic seizures), developmental delay, and malformation of cortical development (MCD) in 92% of cases.
  • West syndrome was diagnosed in over 10% of patients, and continuous spikes and waves during slow sleep (CSWS) emerged as a potential new phenotype.

Conclusions:

  • DYNC1H1-related epilepsy presents with a broad phenotype, frequently involving MCD and developmental delay.
  • West syndrome is a common epileptic syndrome in this cohort.
  • CSWS represents a novel phenotype, expanding the understanding of DYNC1H1-related epilepsy spectrum.