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Case Reports
Letter
Array-CGH detection of a de novo 0.8Mb deletion in 19q13.32 associated with mental retardation, cardiac malformation, cleft lip and palate, hearing loss and multiple dysmorphic features.
European Journal of Medical Genetics 2009 January
We report on a 28-year old woman carrying a 0.8 Mb de novo interstitial deletion in 19q13.32 detected by high-resolution array-CGH. She has severe mental retardation, tetralogy of Fallot, cleft lip and palate, deafness, megacolon and other dysmorphic features. Only a few cases of constitutional deletions located at the long arm of chromosome 19 have been previously described and this is the first report involving 19q13.32. The deleted region encompasses 15 genes, among which 3 candidate genes for genotype-phenotype correlation could be delineated. Since SLC8A2 is broadly expressed in brain and plays a potential role during embryonic development, its haploinsufficiency could possibly be related to mental retardation; as it is also expressed in aortic and intestinal smooth muscles, SLC8A2 could be related to the aortic defect of the complex cardiac malformation and to the megacolon. SAE1, a SUMO-1 activating enzyme subunit, may be related to cleft lip and palate. KPTN coding region may be a candidate gene for hearing loss. Further experimental studies on either in vivo models or diagnostic materials are needed to elucidate the role of these potential candidate genes for the phenotypic abnormalities observed in the investigated patient.
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