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Published on: May 16, 2025
Novel LTBP3 mutations associated with thoracic aortic aneurysms and dissections
Guoyan Zhu1, Mingyao Luo2, Qianlong Chen1
1State Key Laboratory of Cardiovascular Disease, Beijing Key Laboratory for Molecular Diagnostics of Cardiovascular Diseases, Diagnostic Laboratory Service, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China.
Genetic analysis identified new mutations in the LTBP3 gene in patients with thoracic aortic aneurysm and dissection (TAAD). This finding expands the known genetic causes of TAAD and suggests LTBP3 should be included in routine genetic testing for the condition.
Area of Science:
- Genetics
- Cardiovascular Medicine
- Medical Genomics
Background:
- Thoracic aortic aneurysm and dissection (TAAD) is a serious condition with varied genetic causes.
- LTBP3 gene variants were previously uncertainly linked to TAAD, with known associations to dental and skeletal issues.
Purpose of the Study:
- To investigate the role of LTBP3 variants in TAAD.
- To identify novel genetic contributors to TAAD in a cohort of patients without mutations in known genes.
Main Methods:
- Whole-exome sequencing (WES) was performed on 266 TAAD probands.
- Analysis focused on identifying rare variants within the LTBP3 gene.
Main Results:
- Two compound heterozygous mutations (c.625dup and c.1965del) in LTBP3 were found in an Asian TAAD patient with short stature and dental problems.
- Several rare heterozygous LTBP3 variants were identified in other sporadic TAAD cases.
Conclusions:
- This study provides further clinical evidence supporting LTBP3 as a gene associated with TAAD.
- Incorporating LTBP3 into routine genetic analysis may improve TAAD diagnosis and understanding of its phenotypic spectrum.
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