Abstract
Schinzel-Giedion syndrome is characterized by severe mental retardation, distinctive facial features and multiple congenital malformations; most affected individuals die before the age of ten. We sequenced the exomes of four affected individuals (cases) and found heterozygous de novo variants in SETBP1 in all four. We also identified SETBP1 mutations in eight additional cases using Sanger sequencing. All mutations clustered to a highly conserved 11-bp exonic region, suggesting a dominant-negative or gain-of-function effect.
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Acknowledgements
We thank the subjects and their parents for participation in this study. We thank S. Keijzers-Vloet, J. de Ligt, N. Leijsten and personnel from the Sequencing Facility Nijmegen for technical assistance and I. Saleem for referring patient 3 to us. This study was financially supported by the Netherlands Organization for Health Research and Development (ZonMW grants 917-66-36 and 911-08-025 to J.A.V. and 917-86-319 to B.B.A.d.V.), the EU-funded TECHGENE project (Health-F5-2009-223143 to P.A. and J.A.V.) and the AnEUploidy project (LSHG-CT-2006-37627 to A.Hoischen, B.W.M.v.B., H.G.B., B.B.A.d.V. and J.A.V.).
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A. Hoischen, B.W.M.v.B., C.G., H.G.B., B.B.A.d.V. and J.A.V. conceived the project and planned the experiments. B.W.M.v.B., H.G.B. and B.B.A.d.V. performed review of phenotypes and sample collection. G.M., K.D., M.Z.A., N.R., A.K., M.B., A.T., J.S., C.O., A. Henderson, I.M.H. and E.M.T. clinically characterized the Schinzel-Giedion syndrome cases and collected blood samples. A. Hoischen, P.A. and B.v.L. performed next-generation sequencing experiments. M.S. and P.d.V. performed validation experiments. C.G., R.d.R. and N.W. analyzed and interpreted the data. A. Hoischen, B.W.M.v.B., C.G. and J.A.V. prepared the draft manuscript. All authors contributed to the final manuscript.
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Hoischen, A., van Bon, B., Gilissen, C. et al. De novo mutations of SETBP1 cause Schinzel-Giedion syndrome. Nat Genet 42, 483–485 (2010). https://doi.org/10.1038/ng.581
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DOI: https://doi.org/10.1038/ng.581
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