Distinct genetic architectures for syndromic and nonsyndromic congenital heart defects identified by exome sequencing.

Distinct genetic architectures for syndromic and nonsyndromic congenital heart defects identified by exome sequencing.

<p>Congenital heart defects (CHDs) have a neonatal incidence of 0.8–1% (refs. 1,2). Despite abundant examples of monogenic CHD in humans and mice, CHD has a low absolute sibling recurrence risk (~2.7%), suggesting a considerable role for de novo mutations (DNMs) and/or incomplete penetrance. D...

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Main Authors: Sifrim, A, Hitz, M, Wilsdon, A, Breckpot, J, Al Turki, S, Thienpont, B, McRae, J, Fitzgerald, T, Singh, T, Swaminathan, G, Prigmore, E, Rajan, D, Abdul-Khaliq, H, Banka, S, Bauer, U, Bentham, J, Berger, F, Bhattacharya, S, Bu'Lock, F, Canham, N, Colgiu, I, Cosgrove, C, Cox, H, Daehnert, I, Daly, A, Danesh, J, Fryer, A, Gewillig, M, Hobson, E, Hoff, K, Homfray, T, Kahlert, A, Ketley, A, Kramer, H, Lachlan, K, Lampe, A, Louw, J, Manickara, A, Manase, D, McCarthy, K, Metcalfe, K, Moore, C, Newbury-Ecob, R, Omer, S, Ouwehand, W, Park, S, Parker, M, Pickardt, T, Pollard, M, Robert, L, Roberts, D, Sambrook, J, Setchfield, K, Stiller, B, Thornborough, C, Toka, O, Watkins, H, Williams, D, Wright, M, Mital, S, Daubeney, P, Keavney, B, Goodship, J, Abu-Sulaiman, R, Klaassen, S, Wright, C, Firth, H, Barrett, J, Devriendt, K, FitzPatrick, D, Brook, J, Hurles, M
Format: Journal article
Language:English
Published: Nature Publishing Group 2016
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Summary:<p>Congenital heart defects (CHDs) have a neonatal incidence of 0.8–1% (refs. 1,2). Despite abundant examples of monogenic CHD in humans and mice, CHD has a low absolute sibling recurrence risk (~2.7%), suggesting a considerable role for de novo mutations (DNMs) and/or incomplete penetrance. De novo proteintruncating variants (PTVs) have been shown to be enriched among the 10% of ‘syndromic’ patients with extra-cardiac manifestations . We exome sequenced 1,891 probands, including both syndromic CHD (S-CHD, n = 610) and nonsyndromic CHD (NS-CHD, n = 1,281). In S-CHD, we confirmed a significant enrichment of de novo PTVs but not inherited PTVs in known CHD-associated genes, consistent with recent findings. Conversely, in NS-CHD we observed significant enrichment of PTVs inherited from unaffected parents in CHD-associated genes. We identified three genome-wide significant S-CHD disorders caused by DNMs in CHD4, CDK13 and PRKD1. Our study finds evidence for distinct genetic architectures underlying the low sibling recurrence risk in S-CHD and NS-CHD.</p>

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