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Genetic diversity and pathogenic variants as possible predictors of severity in a French sample of nonsyndromic heritable thoracic aortic aneurysms and dissections (nshTAAD).
Genetics in Medicine ( IF 6.6 ) Pub Date : 2019-02-11 , DOI: 10.1038/s41436-019-0444-y
Pauline Arnaud 1, 2, 3 , Nadine Hanna 1, 2, 3 , Louise Benarroch 2 , Mélodie Aubart 2 , Laurence Bal 4 , Patrice Bouvagnet 5 , Tiffany Busa 6 , Yves Dulac 7 , Sophie Dupuis-Girod 8 , Thomas Edouard 9 , Laurence Faivre 10 , Laurent Gouya 3 , Didier Lacombe 11, 12 , Maud Langeois 3 , Bruno Leheup 13 , Olivier Milleron 3 , Sophie Naudion 11 , Sylvie Odent 14 , Maria Tchitchinadze 3 , Jacques Ropers 15 , Guillaume Jondeau 2, 3 , Catherine Boileau 1, 2, 3
Affiliation  

PURPOSE Heritable thoracic aortic aneurysms and dissections (hTAAD) are life-threatening complications of well-known syndromic diseases or underdiagnosed nonsyndromic heritable forms (nshTAAD). Both have an autosomal dominant transmission and are genetically heterogeneous. Our objective was to describe the relevance of molecular diagnosis in these patients and the contribution of each gene in nshTAAD. METHODS Two hundred twenty-six consecutive nshTAAD probands, either young (<45 years) sporadic or familial cases were included. A next-generation sequencing capture panel comprising 23 known disease-causing genes was performed. RESULTS Class 4 or 5 variants were identified in 18% of the nshTAAD probands, while class 3 variants were found in 10% of them. The yield in familial cases was greater than in sporadic cases. SMAD3 and FBN1 genes were the major disease-causing genes. Unexpectedly, no premature termination codon variant was identified in the FBN1 gene. Furthermore, we report for the first time that aortic dissection or surgery occurred significantly more often and earlier in probands with a class 4 or 5 pathogenic variant. CONCLUSION This study indicates that genetic screening using NGS is efficient in young and familial nshTAAD. The presence of a pathogenic variant has a possible predictive value, which needs to be further investigated because it may influence care.

中文翻译:

遗传多样性和致病变异作为法国非综合征遗传性胸主动脉瘤和夹层 (nshTAAD) 样本中严重程度的可能预测因子。

目的 遗传性胸主动脉瘤和夹层 (hTAAD) 是众所周知的综合征疾病或诊断不足的非综合征遗传形式 (nshTAAD) 的危及生命的并发症。两者都具有常染色体显性遗传,并且具有遗传异质性。我们的目标是描述这些患者中分子诊断的相关性以及每个基因在 nshTAAD 中的贡献。方法 纳入了 226 名连续 nshTAAD 先证者,包括年轻(<45 岁)散发或家族性病例。进行了包含 23 个已知致病基因的下一代测序捕获组。结果 在 18% 的 nshTAAD 先证者中发现了第 4 类或第 5 类变异,而在其中 10% 中发现了第 3 类变异。家族性病例的产量高于散发病例。SMAD3 和 FBN1 基因是主要的致病基因。出乎意料的是,在 FBN1 基因中没有发现提前终止密码子变体。此外,我们首次报告主动脉夹层或手术在具有 4 级或 5 级致病性变异的先证者中发生得更频繁和更早。结论 本研究表明,使用 NGS 进行基因筛查在年轻和家族性 nshTAAD 中是有效的。致病性变异的存在具有可能的预测价值,需要进一步研究,因为它可能会影响护理。结论 本研究表明,使用 NGS 进行基因筛查在年轻和家族性 nshTAAD 中是有效的。致病性变异的存在具有可能的预测价值,需要进一步研究,因为它可能会影响护理。结论 本研究表明,使用 NGS 进行基因筛查在年轻和家族性 nshTAAD 中是有效的。致病性变异的存在具有可能的预测价值,需要进一步研究,因为它可能会影响护理。
更新日期:2019-02-11
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