Increased frequency of FBN1 truncating and splicing variants in Marfan syndrome patients with aortic events

Linnea M. Baudhuin, Katrina E. Kotzer, Susan A. Lagerstedt

Research output: Contribution to journalArticle

33 Scopus citations

Abstract

Purpose: Marfan syndrome is a systemic disorder that typically involves FBN1 mutations and cardiovascular manifestations. We investigated FBN1 genotype-phenotype correlations with aortic events (aortic dissection and prophylactic aortic surgery) in patients with Marfan syndrome. Methods: Genotype and phenotype information from probands (n = 179) with an FBN1 pathogenic or likely pathogenic variant were assessed. Results: A higher frequency of truncating or splicing FBN1 variants was observed in Ghent criteria-positive patients with an aortic event (n = 34) as compared with all other probands (n = 145) without a reported aortic event (79 vs. 39%; P < 0.0001), as well as Ghent criteria-positive probands (n = 54) without an aortic event (79 vs. 48%; P = 0.0039). Most probands with an early aortic event had a truncating or splicing variant (100% (n = 12) and 95% (n = 21) of patients younger than 30 and 40 years old, respectively). Aortic events occurred at a younger median age in patients with truncating/splicing variants (29 years) as compared with those with missense variants (51 years). A trend toward a higher frequency of truncating/splicing variants in patients with aortic dissection (n = 21) versus prophylactic surgery (n = 13) (85.7 vs. 69.3%; not significant) was observed. Conclusion: These aortic event- and age-associated findings may have important implications for the management of Marfan syndrome patients with FBN1 truncating and splicing variants.

Original languageEnglish (US)
Pages (from-to)177-187
Number of pages11
JournalGenetics in Medicine
Volume17
Issue number3
DOIs
StatePublished - Mar 1 2015

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Keywords

  • aortic dissection
  • aortic surgery
  • FBN1
  • fibrillin-1
  • Marfan syndrome

ASJC Scopus subject areas

  • Genetics(clinical)
  • Medicine(all)

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