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Genotype-phenotype correlation in vanishing white matter disease.

H D W van der Lei1, C G M van Berkel, W N van Wieringen

  • 1Department of Child Neurology, VU University Medical Center, Amsterdam, the Netherlands.

Neurology
|October 27, 2010
PubMed
Summary

The combination of mutations in the EIF2B5 gene influences the severity of vanishing white matter (VWM) disease. Females generally experience a milder disease course compared to males.

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Area of Science:

  • Neuroscience
  • Genetics
  • Biochemistry

Background:

  • Vanishing white matter (VWM) is a severe autosomal recessive leukoencephalopathy.
  • VWM results from mutations in eukaryotic initiation factor 2B (eIF2B) genes, crucial for protein translation.
  • Significant variability exists in VWM onset, severity, and progression, with genotype-phenotype correlations unclear.

Purpose of the Study:

  • To investigate the influence of specific EIF2B5 gene mutations on the clinical phenotype of VWM.
  • To determine the impact of mutation combinations and gender on disease severity and progression.

Main Methods:

  • Cross-sectional observational study of 184 VWM patients with defined EIF2B5 mutations.
  • Analysis included patients with homozygous or compound-heterozygous p.Arg113His and p.Thr91Ala mutations.
  • Clinical characteristics evaluated: gender, age at onset, motor milestones, and survival.

Main Results:

  • Homozygous p.Arg113His mutations were associated with a milder VWM phenotype compared to compound heterozygous p.Arg113His or homozygous p.Thr91Ala.
  • Patients with p.Arg113His/p.Arg339any showed milder phenotypes than those with p.Thr91Ala/p.Arg339any.
  • Females consistently exhibited a milder disease course than males.

Conclusions:

  • The specific combination of mutations in the EIF2B5 gene significantly shapes the clinical presentation of VWM.
  • Gender is a notable factor, with females generally experiencing a less severe disease course than males.