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Schneider A, Puechberty J, Ng BL, Coubes C, Gatinois V, Tournaire M, Girard M, Dumont B, Bouret P, Magnetto J, Baghdadli A, Pellestor F, Geneviève D. Identification of disrupted AUTS2 and EPHA6 genes by array painting in a patient carrying a de novo balanced translocation t(3;7) with intellectual disability and neurodevelopment disorder. Am J Med Genet A 2015; 167A:3031-7. [PMID: 26333717 DOI: 10.1002/ajmg.a.37350] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Accepted: 08/12/2015] [Indexed: 11/09/2022]
Abstract
Intellectual disability (ID) is a frequent feature but is highly clinically and genetically heterogeneous. The establishment of the precise diagnosis in patients with ID is challenging due to this heterogeneity but crucial for genetic counseling and appropriate care for the patients. Among the etiologies of patients with ID, apparently balanced de novo rearrangements represent 0.6%. Several mechanisms explain the ID in patients with apparently balanced de novo rearrangement. Among them, disruption of a disease gene at the breakpoint, is frequently evoked. In this context, technologies recently developed are used to characterize precisely such chromosomal rearrangements. Here, we report the case of a boy with ID, facial features and autistic behavior who is carrying a de novo balanced reciprocal translocation t(3;7)(q11.2;q11.22)dn. Using microarray analysis, array painting (AP) technology combined with molecular study, we have identified the interruption of the autism susceptibility candidate 2 gene (AUTS2) and EPH receptor A6 gene (EPHA6). We consider that the disruption of AUTS2 explains the phenotype of the patient; the exact role of EPHA6 in human pathology is not well defined. Based on the observation of recurrent germinal and somatic translocations involving AUTS2 and the molecular environment content, we put forward the hypothesis that the likely chromosomal mechanism responsible for the translocation could be due either to replicative stress or to recombination-based mechanisms.
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Affiliation(s)
- Anouck Schneider
- Laboratoire de Génétique Chromosomique, Plateforme de puces à ADN, CHRU de Montpellier, France
| | | | - Bee Ling Ng
- Cytometry Core Facility, The Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, United Kingdom
| | | | - Vincent Gatinois
- Laboratoire de Génétique Chromosomique, Plateforme de puces à ADN, CHRU de Montpellier, France
| | - Magali Tournaire
- Laboratoire de Génétique Chromosomique, Plateforme de puces à ADN, CHRU de Montpellier, France
| | - Manon Girard
- Laboratoire de Génétique Chromosomique, Plateforme de puces à ADN, CHRU de Montpellier, France
| | - Bruno Dumont
- Laboratoire de Génétique Chromosomique, Plateforme de puces à ADN, CHRU de Montpellier, France
| | - Pauline Bouret
- Laboratoire de Génétique Chromosomique, Plateforme de puces à ADN, CHRU de Montpellier, France
| | - Julia Magnetto
- CRA, Département de Psychiatrie de l'Enfant et de l'Adolescent, Centre de Ressources Autisme, CHRU de Montpellier, France
| | - Amaria Baghdadli
- CRA, Département de Psychiatrie de l'Enfant et de l'Adolescent, Centre de Ressources Autisme, CHRU de Montpellier, France
| | - Franck Pellestor
- Laboratoire de Génétique Chromosomique, Plateforme de puces à ADN, CHRU de Montpellier, France
| | - David Geneviève
- Laboratoire de Génétique Chromosomique, Plateforme de puces à ADN, CHRU de Montpellier, France.,Département de Génétique Médicale, CHRU de Montpellier, France
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