Journal
BMC MEDICAL GENETICS
Volume 15, Issue -, Pages -Publisher
BMC
DOI: 10.1186/1471-2350-15-23
Keywords
Bicuspid aortic valve; Aortic disease; Aneurysm; Marfan syndrome; Fibrillin-1
Categories
Funding
- Ente Cassa di Risparmio di Firenze to Fiorgen Foundation, Florence, Italy
- University of Florence
Ask authors/readers for more resources
Background: Bicuspid aortic valve (BAV) is the most frequent congenital heart disease with frequent involvement in thoracic aortic dilatation, aneurysm and dissection. Although BAV and Marfan syndrome (MFS) share some clinical features, and some MFS patients with BAV display mutations in FBN1, the gene encoding fibrillin-1, the genetic background of isolated BAV is poorly defined. Methods: Ten consecutive BAV patients [8 men, age range 24-42 years] without MFS were clinically characterized. BAV phenotype and function, together with evaluation of aortic morphology, were comprehensively assessed by Doppler echocardiography. Direct sequencing of each FBN1 exon with flanking intron sequences was performed on eight patients. Results: We detected three FBN1 mutations in two patients (aged 24 and 25 years) displaying aortic root aneurysm >= 50 mm and moderate aortic regurgitation. In particular, one patient had two mutations (p.Arg2726Trp and p.Arg636Gly) one of which has been previously associated with variable Marfanoid phenotypes. The other patient showed a pArg529Gln substitution reported to be associated with an incomplete MFS phenotype. Conclusions: The present findings enlarge the clinical spectrum of isolated BAV to include patients with BAV without MFS who have involvement of FBN1 gene. These results underscore the importance of accurate phenotyping of BAV aortopathy and of clinical characterization of BAV patients, including investigation of systemic connective tissue manifestations and genetic testing.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available