De novo copy number variants are associated with congenital diaphragmatic hernia

Lan Yu, Julia Wynn, Lijiang Ma, Saurav Guha, George B. Mychaliska, Timothy M. Crombleholme, Kenneth S. Azarow, Foong Yen Lim, Dai H. Chung, Douglas Potoka, Brad W. Warner, Brian Bucher, Charles A. LeDuc, Katherine Costa, Charles Stolar, Gudrun Aspelund, Marc S. Arkovitz, Wendy K. Chung

Research output: Contribution to journalArticle

32 Scopus citations

Abstract

Background: Congenital diaphragmatic hernia (CDH) is a common birth defect with significant morbidity and mortality. Although the aetiology of CDH remains poorly understood, studies from animal models and patients with CDH suggest that genetic factors play an important role in the development of CDH. Chromosomal anomalies have been reported in CDH. Methods: In this study, the authors investigated the frequency of chromosomal anomalies and copy number variants (CNVs) in 256 parent-child trios of CDH using clinical conventional cytogenetic and microarray analysis. The authors also selected a set of CDH related training genes to prioritise the genes in those segmental aneuploidies and identified the genes and gene sets that may contribute to the aetiology of CDH. Results: The authors identified chromosomal anomalies in 16 patients (6.3%) of the series including three aneuploidies, two unbalanced translocation, and 11 patients with de novo CNVs ranging in size from 95 kb to 104.6 Mb. The authors prioritised the genes in the CNV segments and identified KCNA2, LMNA, CACNA1S, MYOG, HLX, LBR, AGT, GATA4, SOX7, HYLS1, FOXC1, FOXF2, PDGFA, FGF6, COL4A1, COL4A2, HOMER2, BNC1, BID, and TBX1 as genes that may be involved in diaphragm development. Gene enrichment analysis identified the most relevant gene ontology categories as those involved in tissue development (p=4.4×10-11) or regulation of multicellular organismal processes (p=2.8×10-10) and 'receptor binding' (p=8.7×10-14) and 'DNA binding transcription factor activity' (p=4.4×10-10). Conclusions: The present findings support the role of chromosomal anomalies in CDH and provide a set of candidate genes including FOXC1, FOXF2, PDGFA, FGF6, COL4A1, COL4A2, SOX7, BNC1, BID, and TBX1 for further analysis in CDH.

Original languageEnglish (US)
Pages (from-to)650-659
Number of pages10
JournalJournal of medical genetics
Volume49
Issue number10
DOIs
StatePublished - Oct 1 2012
Externally publishedYes

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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    Yu, L., Wynn, J., Ma, L., Guha, S., Mychaliska, G. B., Crombleholme, T. M., Azarow, K. S., Lim, F. Y., Chung, D. H., Potoka, D., Warner, B. W., Bucher, B., LeDuc, C. A., Costa, K., Stolar, C., Aspelund, G., Arkovitz, M. S., & Chung, W. K. (2012). De novo copy number variants are associated with congenital diaphragmatic hernia. Journal of medical genetics, 49(10), 650-659. https://doi.org/10.1136/jmedgenet-2012-101135