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Exome sequencing reveals a novel Fanconi group defined by XRCC2 mutation
  1. Hanan E Shamseldin1,
  2. Mohamed Elfaki2,
  3. Fowzan S Alkuraya1,2,3
  1. 1Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
  2. 2Department of Pediatrics, King Khalid University Hospital and College of Medicine, King Saud University, Riyadh, Saudi Arabia
  3. 3Department of Anatomy and Cell Biology, College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
  1. Correspondence to Dr Fowzan S Alkuraya, Developmental Genetics Unit, King Faisal Specialist Hospital and Research Center, MBC-03 PO Box 3354, Riyadh 11211, Saudi Arabia; falkuraya{at}kfshrc.edu.sa

Abstract

Background Fanconi anaemia (FA) is a group of disorders characterised by progressive bone marrow failure and a characteristic but variable craniofacial and skeletal involvement. Recessive mutations in any of 15 genes linked to FA lead to the pathognomonic increased susceptibility to double-strand DNA breaks.

Methods Autozygome and exome analysis of a patient with classic FA phenotype

Results The authors identified a novel truncating mutation in XRCC2. Consistent with the proposed causal link to FA, this gene is an essential non-redundant component of the RAD51 family of homologous repair proteins and its deficiency in a murine model has been shown to lead to a highly similar phenotype to that of this patient both at the cellular and organismal level.

Conclusion This study implicates XRCC2 in the pathogenesis of FA and calls for further investigation of the potential contribution of XRCC2 mutations to the overall mutational load of FA.

  • Autozygome
  • double-strand DNA breaks
  • Fanconi anaemia
  • genetics
  • RAD51

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Footnotes

  • Funding This study was funded in part by KACST grant 09-MED941-20 (FSA), and a Dubai-Harvard Foundation for Medical Research Collaborative Grant (FSA).

  • Competing interests None.

  • Patient consent Obtained.

  • Ethics approval Ethics approval was provided by the King Faisal Specialist Hospital and Research Center Institutional Review Board.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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