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Interstitial deletions at 6q14.1-q15 associated with obesity, developmental delay and a distinct clinical phenotype
Umeå University, Faculty of Medicine, Department of Medical Biosciences, Medical and Clinical Genetics.
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2010 (English)In: Molecular syndromology, ISSN 1661-8777, Vol. 1, no 2, 75-81 p.Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: Interstitial deletions of the long arm of chromosome 6 have been described in several patients with obesity and a Prader-Willi-like phenotype. Haploinsufficiency of the SIM1 gene located at 6q16.3 is suggested as being responsible for the regulation of body weight. Here we report on 2 patients with interstitial deletions at 6q14.1-q15 presenting with obesity and symptoms strikingly similar to those reported for deletions involving the SIM1 gene despite not having a deletion of this gene.

METHODS: Array comparative genomic hybridisation was used to diagnose 2 children with obesity and developmental delay, revealing 2 interstitial deletions at 6q14.1-q15 of 8.73 and 4.50 Mb, respectively, and a region of overlap of 4.2-Mb.

RESULTS: The similar phenotype in the 2 patients was most likely due to a 4.2-Mb common microdeletion at 6q14.1-q15. Another patient has previously been described with an overlapping deletion. The 3 patients share several features, such as developmental delay, obesity, hernia, rounded face with full cheeks, epicanthal folds, short palpebral fissures, bulbous nose, large ears, and syndactyly between toes II and III.

CONCLUSIONS: Together with a previously reported patient, our study suggests that the detected deletions may represent a novel clinically recognisable microdeletion syndrome caused by haploinsufficiency of dosage-sensitive genes in the 6q14.1-q15 region.

Place, publisher, year, edition, pages
2010. Vol. 1, no 2, 75-81 p.
Keyword [en]
6q Deletion, Learning disability, Mental retardation, Obesity
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:umu:diva-39240DOI: 10.1159/000314025PubMedID: 21045960OAI: oai:DiVA.org:umu-39240DiVA: diva2:389373
Available from: 2011-01-19 Created: 2011-01-19 Last updated: 2011-12-06Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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