The effect of NOTCH3 pathogenic variant position on CADASIL disease severity: NOTCH3 EGFr 1–6 pathogenic variant are associated with a more severe phenotype and lower survival compared with EGFr 7–34 pathogenic variant

Purpose: CADASIL is a small-vessel disease caused by a cysteine-altering pathogenic variant in one of the 34 epidermal growth factor-like repeat (EGFr) domains of the NOTCH3 protein. We recently found that pathogenic variant in EGFr domains 7\u201334 have an unexpectedly high frequency in the general population (1:300). We hypothesized that EGFr 7\u201334 pathogenic variant more frequently cause a much milder phenotype, thereby explaining an important part of CADASIL disease variability. Methods: Age at first stroke, survival and white matter hyperintensity volume were compared between 664 CADASIL patients with either a NOTCH3 EGFr 1\u20136 pathogenic variant or an EGFr 7\u201334 pathogenic variant. The frequencies of NOTCH3 EGFr 1\u20136 and EGFr 7\u201334 pathogenic variant were compared between individuals in the genome Aggregation Database and CADASIL patients. Results: CADASIL patients with an EGFr 1\u20136 pathogenic variant have a 12-year earlier onset of stroke than those with an EGFr 7\u201334 pathogenic variant, lower survival, and higher white matter hyperintensity volumes. Among diagnosed CADASIL patients, 70% have an EGFr 1\u20136 pathogenic variant, whereas EGFr 7\u201334 pathogenic variant strongly predominate in the population. Conclusion: NOTCH3 pathogenic variant position is the most important determinant of CADASIL disease severity, with EGFr 7\u201334 pathogenic variant predisposing to a later onset of stroke and longer survival

Eighteen-year disease progression and survival in CADASIL

Neuro Imaging Researc

Correction to: The effect of NOTCH3 pathogenic variant position on CADASIL disease severity: NOTCH3 EGFr 1–6 pathogenic variant are associated with a more severe phenotype and lower survival compared with EGFr 7–34 pathogenic variant

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