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Mutations in a TGF-? Ligand, TGFB3, Cause Syndromic Aortic Aneurysms and Dissections #MMPMID25835445
Bertoli-Avella AM; Gillis E; Morisaki H; Verhagen JM; de Graaf BM; van de Beek G; Gallo E; Kruithof BP; Venselaar H; Myers LA; Laga S; Doyle AJ; Oswald G; van Cappellen GW; Yamanaka I; van der Helm RM; Beverloo B; de Klein A; Pardo L; Lammens M; Evers C; Devriendt K; Dumoulein M; Timmermans J; Bruggenwirth HT; Verheijen F; Rodrigus I; Baynam G; Kempers M; Saenen J; Van Craenenbroeck EM; Minatoya K; Matsukawa R; Tsukube T; Kubo N; Hofstra R; Goumans MJ; Bekkers JA; Roos-Hesselink JW; van de Laar IM; Dietz HC; Van Laer L; Morisaki T; Wessels MW; Loeys BL
J Am Coll Cardiol 2015[Apr]; 65 (13): 1324-36 PMID25835445show ga
Background: Aneurysms affecting the aorta are a common condition associated with high mortality as a result of aortic dissection or rupture. Investigations of the pathogenic mechanisms involved in syndromic types of thoracic aortic aneurysms, such as Marfan and Loeys-Dietz syndromes, have revealed an important contribution of disturbed transforming growth factor (TGF)-? signaling. Objectives: This study sought to discover a novel gene causing syndromic aortic aneurysms in order to unravel the underlying pathogenesis. Methods: We combined genome-wide linkage analysis, exome sequencing, and candidate gene Sanger sequencing in a total of 470 index cases with thoracic aortic aneurysms. Extensive cardiological examination, including physical examination, electrocardiography, and transthoracic echocardiography was performed. In adults, imaging of the entire aorta using computed tomography or magnetic resonance imaging was done. Results: Here, we report on 43 patients from 11 families with syndromic presentations of aortic aneurysms caused by TGFB3 mutations. We demonstrate that TGFB3 mutations are associated with significant cardiovascular involvement, including thoracic/abdominal aortic aneurysm and dissection, and mitral valve disease. Other systemic features overlap clinically with Loeys-Dietz, Shprintzen-Goldberg, and Marfan syndromes, including cleft palate, bifid uvula, skeletal overgrowth, cervical spine instability and clubfoot deformity. In line with previous observations in aortic wall tissues of patients with mutations in effectors of TGF-? signaling (TGFBR1/2, SMAD3, and TGFB2), we confirm a paradoxical up-regulation of both canonical and noncanonical TGF-? signaling in association with up-regulation of the expression of TGF-? ligands. Conclusions: Our findings emphasize the broad clinical variability associated with TGFB3 mutations and highlight the importance of early recognition of the disease because of high cardiovascular risk.
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J+Am+Coll+Cardiol 2015 ; 65 (13): 1324-36
