Journal Article

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

Klaassen, Sabine, Daly, Allan, Newbury-Ecob, Ruth, Ketley, Ami, Louw, Jacoba J, Bu'Lock, Frances, Watkins, Hugh, Mital, Seema, FitzPatrick, David R, Toka, Okan, Setchfield, Kerry, Manickara, Ashok Kumar, Metcalfe, Kay, Cosgrove, Catherine, Lampe, Anne Katrin, Sifrim, Alejandro, Devriendt, Koenraad, Hobson, Emma, Thornborough, Chris, Singh, Tarjinder, Williams, Denise, Breckpot, Jeroen, Goodship, Judith, Fitzgerald, Tomas W, Brook, J David, Abdul-Khaliq, Hashim, Hurles, Matthew E, Gewillig, Marc, Canham, Natalie, Swaminathan, Ganesh Jawahar, Park, Soo-Mi, Thienpont, Bernard, Sambrook, Jennifer, Robert, Leema, Wright, Michael, Hitz, Marc-Phillip, Cox, Helen, Wilsdon, Anna, Bauer, Ulrike M M, Ouwehand, Willem H, Prigmore, Elena, Colgiu, Irina-Gabriela, Fryer, Alan, Firth, Helen V, Bentham, Jamie, Abu-Sulaiman, Riyadh Mahdi, Bhattacharya, Shoumo, Danesh, John, Lachlan, Katherine, Daubeney, Piers E F, McRae, Jeremy, Kramer, Hans-Heiner, Omer, Seham Osman, Pollard, Martin O, Wright, Caroline F, Moore, Carmel, Banka, Siddharth, Parker, Michael J, Stiller, Brigitte, Barrett, Jeffrey C, Daehnert, Ingo, Pickardt, T

2016

Overview

Matthew Hurles and colleagues report exome sequencing of 1,891 individuals with syndromic or nonsyndromic congenital heart defects (CHD). They found that nonsyndromic CHD patients were enriched for protein-truncating variants in CHD-associated genes inherited from unaffected parents and identified three new syndromic CHD disorders caused by de novo mutations. 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%) 3 , suggesting a considerable role for de novo mutations (DNMs) and/or incomplete penetrance 4 , 5 . De novo protein-truncating variants (PTVs) have been shown to be enriched among the 10% of 'syndromic' patients with extra-cardiac manifestations 6 , 7 . 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 8 . 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.

• Publisher: Nature Publishing Group US,Nature Publishing Group
• Subject: 45 / 45/23 / 45/43 / 631/208/2489 / 692/308/2056 / 692/699/75/1539 / Agriculture / Animal Genetics and Genomics / Autism / Autoantigens - genetics / Biomedical research / Biomedicine / Cancer Research / CDC2 Protein Kinase - chemistry / CDC2 Protein Kinase - genetics / Congenital diseases / Congenital heart defects / Defects / Development and progression / Exome - genetics / Exome sequencing / Female / Funding / Gene Function / Genes / Genetic aspects / Genetic variation / Genomes / Genomics / Health aspects / Heart / Heart Defects, Congenital - genetics / Human Genetics / Humans / Identification and classification / Kinases / letter / Male / Medical research / Methods / Mi-2 Nucleosome Remodeling and Deacetylase Complex - genetics / Mutation / Mutation - genetics / Protein Conformation / Protein Kinase C - genetics / RNA polymerase / Sequence Deletion / Syndrome