NDLI: Aortic root aortopathy in bicuspid aortic valve associated with high genetic risk

Content Provider	Springer Nature : BioMed Central
Author	Ma, Mingjia Li, Zongzhe Mohamed, Mohamed Abdulkadir Liu, Ligang Wei, Xiang
Abstract	Background The bicuspid aortic valve (BAV) is prone to ascending aortic dilatation (AAD) involving both the tubular segment and the aortic root. The genetic factor was proposed as one of the most important mechanisms for AAD. We hypothesized that the rare genetic variants mainly contribute to the pathogenesis of aortic roots in affected individuals. Methods The diameter of aortic root or ascending aorta ≥ 40 mm was counted as AAD. The targeted next-generation sequencing of 13 BAV-associated genes were performed on a continuous cohort of 96 unrelated BAV patients. The rare variants with allele frequency < 0.05% were selected and analyzed. Variants frequency was compared against the Exome aggregation consortium database. The pathogenicity of the genetic variants was evaluated according to the American College of Medical Genetics and Genomics guidelines. Results A total of 27 rare nonsynonymous coding variants involving 9 genes were identified in 25 individuals. The burden analysis revealed that variants in GATA5, GATA6, and NOTCH1 were significantly associated with BAV. Eighty percent of the pathogenic variants were detected in root group. The detection rate of rare variants was higher in root dilatation group (71.4%) compared with normal aorta (29.0%) and tubular dilatation groups (29.6%) (P = 0.018). The rare variant was identified as the independent risk factor of root dilatation [P = 0.014, hazard ratio = 23.9, 95% confidence interval (1.9–302.9)]. Conclusions Our results presented a broad genetic spectrum in BAV patients. The rare variants of BAV genes contribute the most to the root phenotype among BAV patients.
Related Links	https://bmccardiovascdisord.biomedcentral.com/counter/pdf/10.1186/s12872-021-02215-y.pdf
Ending Page	9
Page Count	9
Starting Page	1
File Format	HTM / HTML
ISSN	14712261
DOI	10.1186/s12872-021-02215-y
Journal	BMC Cardiovascular Disorders
Issue Number	1
Volume Number	21
Language	English
Publisher	BioMed Central
Publisher Date	2021-08-30
Access Restriction	Open
Subject Keyword	Cardiology Cardiac Surgery Angiology Blood Transfusion Medicine Internal Medicine Medicine Public Health Bicuspid aortic valve Next generation sequencing Aortopathy Rare variant Medicine/Public Health
Content Type	Text
Resource Type	Article
Subject	Cardiology and Cardiovascular Medicine
Journal Impact Factor	2/2023
5-Year Journal Impact Factor	2.3/2023

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