High frequency of submicroscopic chromosomal imbalances in patients with syndromic craniosynostosis detected by a combined approach of microsatellite segregation analysis, multiplex ligation-dependent probe amplification and array-based comparative genome hybridisation
- F S Jehee1,
- A C V Krepischi-Santos1,
- K M Rocha1,
- D P Cavalcanti2,
- C A Kim3,
- D R Bertola3,
- L G Alonso4,
- C S D’Angelo1,
- J F Mazzeu1,
- G Froyen5,6,
- D Lugtenberg7,
- A M Vianna-Morgante1,
- C Rosenberg1,
- M R Passos-Bueno1
- 1Centro de Estudos do Genoma Humano, Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo, Brazil
- 2Depto de Genética Médica, Faculdade de Ciências Médicas, UNICAMP, Campinas, São Paulo, Brazil
- 3Instituto da Criança do Hospital das Clinicas, Faculdade de Medicina, USP, São Paulo, Brazil
- 4Centro de Genética Médica, Departamentos de Morfologia e Pediatria, UNIFESP-EPM, São Paulo, Brazil
- 5Human Genome Laboratory, Department of Human Genetics, KU Leuven, Leuven, Belgium
- 6Department for Molecular and Developmental Genetics, VIB, Leuven, Belgium
- 7Department of Human Genetics, Radboud University Nijmegen Medical Centre,Nijmegen, The Netherlands
- Dr M R Passos-Bueno, Centro de Estudos do Genoma Humano, Departamento de Biologia, Instituto de Biociências, Universidade de São Paulo, Rua do Matão 277, sala 200 CEP 05508-900, São Paulo, SP, Brazil; passos{at}ib.usp.br
- Received 19 December 2007
- Revised 28 March 2008
- Accepted 1 April 2008
- Published Online First 2 May 2008
Abstract
We present the first comprehensive study, to our knowledge, on genomic chromosomal analysis in syndromic craniosynostosis. In total, 45 patients with craniosynostotic disorders were screened with a variety of methods including conventional karyotype, microsatellite segregation analysis, subtelomeric multiplex ligation-dependent probe amplification) and whole-genome array-based comparative genome hybridisation. Causative abnormalities were present in 42.2% (19/45) of the samples, and 27.8% (10/36) of the patients with normal conventional karyotype carried submicroscopic imbalances. Our results include a wide variety of imbalances and point to novel chromosomal regions associated with craniosynostosis. The high incidence of pure duplications or trisomies suggests that these are important mechanisms in craniosynostosis, particularly in cases involving the metopic suture.
Footnotes
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Competing interests: None.
