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Characterization of interstitial Xp duplications in two families by tiling path array CGH

Item Type:Article
Title:Characterization of interstitial Xp duplications in two families by tiling path array CGH
Creators Name:Tzschach, A. and Chen, W. and Erdogan, F. and Hoeller, A. and Ropers, H.H. and Castellan, C. and Ullmann, R. and Schinzel, A.
Abstract:Duplications of the short arm of the X chromosome in male patients are rare. We report on the clinical features of mentally retarded patients in two families with different interstitial duplications of Xp and their characterization by tiling path array comparative genomic hybridization (array CGH). In Family A, we detected a duplication of 9.3 Mb in Xp11p21 in a male with severe mental retardation [karyotype 46,XY,dup(X)(p11.3p21.1)] and his healthy mother. The clinical features of this patient--severe mental retardation, obesity, macrocephaly--are in accordance with those of a previously reported patient with a similar duplication. In Family B, a duplication of 8.5 Mb was diagnosed in Xp22 in three male patients with mental retardation [karyotype 46,XY,dup(X)(p22.11p22.2)] and two healthy females. Characterization of the duplications by array CGH enabled the identification of the genes within these intervals. These comprise known mental retardation genes such as MAOA, NDP, TM4SF2, NDP, RSK2, and CDKL5. Duplication of MAOA will be discussed as a possible cause of obesity.
Keywords:Duplication Xp, Mental Retardation, Array CGH, MAOA, Obesity
Source:American Journal of Medical Genetics A
ISSN:1552-4825
Publisher:Wiley (U.S.A.)
Volume:146A
Number:2
Page Range:197-203
Date:15 January 2008
Official Publication:https://doi.org/10.1002/ajmg.a.32070
PubMed:View item in PubMed

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