Hereditary Influence in Thoracic Aortic Aneurysm and Dissection

Circulation. 2016 Jun 14;133(24):2516-28. doi: 10.1161/CIRCULATIONAHA.116.009762.


Thoracic aortic aneurysm is a potentially life-threatening condition in that it places patients at risk for aortic dissection or rupture. However, our modern understanding of the pathogenesis of thoracic aortic aneurysm is quite limited. A genetic predisposition to thoracic aortic aneurysm has been established, and gene discovery in affected families has identified several major categories of gene alterations. The first involves mutations in genes encoding various components of the transforming growth factor beta (TGF-β) signaling cascade (FBN1, TGFBR1, TGFBR2, TGFB2, TGFB3, SMAD2, SMAD3 and SKI), and these conditions are known collectively as the TGF-β vasculopathies. The second set of genes encode components of the smooth muscle contractile apparatus (ACTA2, MYH11, MYLK, and PRKG1), a group called the smooth muscle contraction vasculopathies. Mechanistic hypotheses based on these discoveries have shaped rational therapies, some of which are under clinical evaluation. This review discusses published data on genes involved in thoracic aortic aneurysm and attempts to explain divergent hypotheses of aneurysm origin.

Keywords: Marfan syndrome; aorta; aortic disease.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Aortic Aneurysm, Thoracic / genetics*
  • Aortic Aneurysm, Thoracic / pathology
  • Aortic Dissection / etiology
  • Aortic Dissection / genetics*
  • Genetic Predisposition to Disease
  • Humans
  • Risk Factors