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

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Item Type:	Article
Title:	Distinct genetic architectures for syndromic and nonsyndromic congenital heart defects identified by exome sequencing
Creators Name:	Sifrim, A., Hitz, M.P., Wilsdon, A., Breckpot, J., Turki, S.H.A., Thienpont, B., McRae, J., Fitzgerald, T.W., Singh, T., Swaminathan, G.J., Prigmore, E., Rajan, D., Abdul-Khaliq, H., Banka, S., Bauer, U.M.M., Bentham, J., Berger, F., Bhattacharya, S., Bu'Lock, F., Canham, N., Colgiu, I.G., Cosgrove, C., Cox, H., Daehnert, I., Daly, A., Danesh, J., Fryer, A., Gewillig, M., Hobson, E., Hoff, K., Homfray, T., Kahlert, A.K., Ketley, A., Kramer, H.H., Lachlan, K., Lampe, A.K., Louw, J.J., Manickara, A.K., Manase, D., McCarthy, K.P., Metcalfe, K., Moore, C., Newbury-Ecob, R., Omer, S.O., Ouwehand, W.H., Park, S.M., Parker, M.J., Pickardt, T., Pollard, M.O., Robert, L., Roberts, D.J., Sambrook, J., Setchfield, K., Stiller, B., Thornborough, C., Toka, O., Watkins, H., Williams, D., Wright, M., Mital, S., Daubeney, P.E.F., Keavney, B., Goodship, J., Abu-Sulaiman, R.M., Klaassen, S., Wright, C.F., Firth, H.V., Barrett, J.C., Devriendt, K., FitzPatrick, D.R., Brook, J.D. and Hurles, M.E.
Abstract:	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 protein-truncating 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.
Keywords:	Autoantigens, CDC2 Protein Kinase, Congenital Heart Defects, Exome, Mi-2 Nucleosome Remodeling and Deacetylase Complex, Mutation, Protein Conformation, Protein Kinase C, Sequence Deletion, Syndrome
Source:	Nature Genetics
ISSN:	1061-4036
Publisher:	Nature Publishing Group
Volume:	48
Number:	9
Page Range:	1060-1065
Date:	1 August 2016
Additional Information:	Copyright © 2016 Nature America, Inc. All rights reserved.
Official Publication:	https://doi.org/10.1038/ng.3627
External Fulltext:	View full text on PubMed Central
PubMed:	View item in PubMed

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