[Hereditary cerebral arteriopathy]

W Rein Gustavsen1, Kristin Eiklid

  • 1Nevrologisk avdeling, Sykehuset Østfold Fredrikstad, 1603 Fredrikstad. w-rei@online.no

Insights

Cerebral autosomal dominant arteriopathy with subcortical infarcts and leucoencephalopathy (CADASIL) is a genetic neurovascular disorder. This study identified the R182C mutation in two Norwegian families, confirming its role in CADASIL.

Area of Science:

  • Neurology
  • Genetics
  • Neuroscience

Background:

  • Cerebral autosomal dominant arteriopathy with subcortical infarcts and leucoencephalopathy (CADASIL) is a hereditary neurovascular disease.
  • It is caused by mutations in the NOTCH3 gene and presents with diverse neurological symptoms.
  • Diagnostic methods include genetic testing, MRI, and skin biopsy.

Observation:

  • Two Norwegian families with suspected CADASIL were studied.
  • Eight family members exhibited symptoms consistent with the disease.
  • Genetic analysis was performed on affected and unaffected individuals.

Findings:

  • The R182C mutation in the NOTCH3 gene was identified in seven out of eight tested family members.
  • This specific mutation was found in exon 4.
  • Two asymptomatic brothers also carried the R182C mutation, suggesting incomplete penetrance or pre-symptomatic status.

Implications:

  • This finding reinforces the R182C mutation as a cause of CADASIL.
  • It highlights the importance of genetic screening in families with a history of stroke or dementia.
  • The identification of asymptomatic carriers underscores the complexity of CADASIL and may inform future diagnostic and therapeutic strategies.

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