| Duplication 8q12: confirmation of a novel recognizable phenotype with duane retraction syndrome and developmental delay. | |
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MedLine Citation:
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PMID: 22258531 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Duane retraction syndrome (DRS) is a rare congenital strabismus condition with genetic heterogeneity. DRS associated with intellectual disability or developmental delay is observed in several genetic diseases: syndromes such as Goldenhar or Wildervanck syndrome and chromosomal anomalies such as 12q12 deletion. We report on the case of a patient with DRS, developmental delay and particular facial features (horizontal and flared eyebrows, long and smooth philtrum, thin upper lip, full lower lip and full cheeks). We identified a duplication of the long arm of chromosome 8 (8q12) with SNP-array. This is the third case of a patient with common clinical features and 8q12 duplication described in the literature. The minimal critical region is 1.2 Mb and encompasses four genes: CA8, RAB2, RLBP1L1 and CHD7. To our knowledge, no information is available in the literature regarding pathological effects caused by to overexpression of these genes. However, loss of function of the CHD7 gene leads to CHARGE syndrome, suggesting a possible role of the overexpression of this gene in the phenotype observed in 8q12 duplication patients. We have observed that patients with 8q12 duplication share a common recognizable phenotype characterized by DRS, developmental delay and facial features. Such data combined to the literature strongly suggest that this entity may define a novel syndrome. We hypothesize that CHD7 duplication is responsible for a part of the features observed in 8q12.2 duplication.European Journal of Human Genetics advance online publication, 18 January 2012; doi:10.1038/ejhg.2011.243. |
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Authors:
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Cyril Amouroux; Marie Vincent; Patricia Blanchet; Jacques Puechberty; Anouck Schneider; Anne Marie Chaze; Manon Girard; Magali Tournaire; Christian Jorgensen; Denis Morin; Pierre Sarda; Geneviève Lefort; David Geneviève |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-1-18 |
Journal Detail:
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Title: European journal of human genetics : EJHG Volume: - ISSN: 1476-5438 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-1-19 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9302235 Medline TA: Eur J Hum Genet Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Département de Pédiatrie spécialisée, Unité de Néphrologie et Endocrinologie pédiatrique, CHRU Montpellier, Faculté de Médecine de Montpellier-Nîmes, Université Montpellier 1, Montpellier, France. |
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