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Related Experiment Videos

[CADASIL: genetics and physiopathology].

A Joutel1, A François, H Chabriat

  • 1Laboratoire INSERM EPI 99-21 et Laboratoire de Génétique de l'hôpital Lariboisière-2, rue Ambroise Paré-75475 Paris.

Bulletin De L'Academie Nationale De Medecine
|March 23, 2001
PubMed
Summary
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Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) is caused by mutations in the Notch3 gene. These mutations lead to protein accumulation, offering insights into disease mechanisms and potential therapies.

Area of Science:

  • Genetics
  • Neurology
  • Vascular Biology

Context:

  • Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) is a human genetic disorder affecting small cerebral arteries.
  • It is characterized by vascular smooth muscle cell lesions, leading to stroke and dementia.
  • The underlying pathology is a non-atherosclerotic, non-amyloid angiopathy.

Purpose:

  • To identify the genetic cause of CADASIL.
  • To investigate the molecular mechanisms linking Notch3 mutations to CADASIL.
  • To establish a molecular diagnostic test for CADASIL.

Summary:

  • Positional cloning identified mutations in the Notch3 gene on chromosome 19 as the cause of CADASIL.
  • Mutations are stereotyped, affecting the extracellular domain of the Notch3 receptor.

Related Experiment Videos

  • Notch3 expression is specific to vascular smooth muscle cells; CADASIL tissues show extracellular domain accumulation, suggesting proteolysis/clearance defects.

    • Impact:

    • Identified Notch3 as the causative gene for CADASIL, enabling molecular diagnostics.
    • Revealed Notch3's role in vascular smooth muscle cells and its involvement in arteriopathies.
    • Provided insights into CADASIL pathogenesis, paving the way for targeted therapeutic strategies.