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Wagenstaller, J. ; Spranger, S.* ; Lorenz-Depiereux, B. ; Kazmierczak, B.* ; Nathrath, M.* ; Wahl, D.* ; Heye, B.* ; Glaser, D.* ; Liebscher, V.* ; Meitinger, T. ; Strom, T.M.

Copy-number variations measured by single-nucleotide-polymorphism oligonucleotide arrays in patients with mental retardation.

Am. J. Hum. Genet. 81, 768-779 (2007)
DOI PMC
Open Access Green as soon as Postprint is submitted to ZB.
Whole-genome analysis using high-density single-nucleotide-polymorphism oligonucleotide arrays allows identification of microdeletions, microduplications, and uniparental disomies. We studied 67 children with unexplained mental retardation with normal karyotypes, as assessed by G-banded chromosome analyses. Their DNAs were analyzed with Affymetrix 100K arrays. We detected 11 copy-number variations that most likely are causative of mental retardation, because they either arose de novo (9 cases) and/or overlapped with known microdeletions (2 cases). The eight deletions and three duplications varied in size from 200 kb to 7.5 Mb. Of the 11 copy-number variations, 5 were flanked by low-copy repeats. Two of those, on chromosomes 15q25.2 and Xp22.31, have not been described before and have a high probability of being causative of new deletion and duplication syndromes, respectively. In one patient, we found a deletion affecting only a single gene, MBD5, which codes for the methyl-CpG-binding domain protein 5. In addition to the 67 children, we investigated 4 mentally retarded children with apparent balanced translocations and detected four deletions at breakpoint regions ranging in size from 1.1 to 14 Mb.
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Publication type Article: Journal article
Document type Scientific Article
Language english
Publication Year 2007
HGF-reported in Year 0
ISSN (print) / ISBN 0002-9297
e-ISSN 1537-6605
Journal American Journal of Human Genetics, The
Quellenangaben Volume: 81, Issue: 4, Pages: 768-779 Article Number: , Supplement: ,
Publisher Elsevier
Publishing Place New York, NY
Reviewing status Peer reviewed
Institute(s) Institute of Human Genetics (IHG)
POF-Topic(s) 30501 - Systemic Analysis of Genetic and Environmental Factors that Impact Health
Research field(s) Genetics and Epidemiology
PSP Element(s) G-500700-001
PubMed ID 17847001
DOI 10.1086/521274
WOS ID 000249307600017
Erfassungsdatum 2007-11-22
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