Syndromal obesity due to paternal duplication 6(q24.3‐q27)
Identifieur interne : 00AC63 ( Main/Curation ); précédent : 00AC62; suivant : 00AC64Syndromal obesity due to paternal duplication 6(q24.3‐q27)
Auteurs : Arabella Smith [Australie] ; Anna Jauch [Allemagne] ; Howard Slater [Australie] ; Lisa Robson [Australie] ; Tyls Sandanam [Australie]Source :
- American Journal of Medical Genetics [ 0148-7299 ] ; 1999-05-21.
Abstract
The likelihood of a paternally expressing imprinted gene in chromosome region 6(q23‐24) has been highlighted by cases of transient neonatal diabetes mellitus (TNDM) in which paternal uniparental disomy (UPD) for chromosome 6 or paternal duplication 6(q23‐qter) was detected. We present the case of a 38‐year‐old man with moderate to severe intellectual delay, short stature, small hands and feet, eye abnormality, small mouth, and obesity (without hyperphagia) beginning in mid‐childhood. The perinatal and neonatal histories were normal. The patient had a duplication within 6q. Fluorescence in situ hybrisation studies were performed with single and dual hybridisations using a chromosome 6 library probe, short and long arm subregional probes, 6q23‐24, 6q25.3‐6qter locus‐specific probes, and a 6q telomere probe. The hybridisation results defined an inverted duplication of 6q24.3 to 6q27. DNA studies with microsatellite markers from 6p and 6q showed regular biparental inheritance of chromosome 6 and confirmed that the duplication was paternal in origin. Our patient appears to be the first one known to have paternal duplication of chromosome area 6(q24‐q27) who did not have TNDM as an infant. He has remained nondiabetic, although obesity, without hyperphagia, has been a constant problem since its onset in mid‐childhood. Am. J. Med. Genet. 84:125–131, 1999. © 1999 Wiley‐Liss, Inc.
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DOI: 10.1002/(SICI)1096-8628(19990521)84:2<125::AID-AJMG8>3.0.CO;2-W
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<front><div type="abstract" xml:lang="en">The likelihood of a paternally expressing imprinted gene in chromosome region 6(q23‐24) has been highlighted by cases of transient neonatal diabetes mellitus (TNDM) in which paternal uniparental disomy (UPD) for chromosome 6 or paternal duplication 6(q23‐qter) was detected. We present the case of a 38‐year‐old man with moderate to severe intellectual delay, short stature, small hands and feet, eye abnormality, small mouth, and obesity (without hyperphagia) beginning in mid‐childhood. The perinatal and neonatal histories were normal. The patient had a duplication within 6q. Fluorescence in situ hybrisation studies were performed with single and dual hybridisations using a chromosome 6 library probe, short and long arm subregional probes, 6q23‐24, 6q25.3‐6qter locus‐specific probes, and a 6q telomere probe. The hybridisation results defined an inverted duplication of 6q24.3 to 6q27. DNA studies with microsatellite markers from 6p and 6q showed regular biparental inheritance of chromosome 6 and confirmed that the duplication was paternal in origin. Our patient appears to be the first one known to have paternal duplication of chromosome area 6(q24‐q27) who did not have TNDM as an infant. He has remained nondiabetic, although obesity, without hyperphagia, has been a constant problem since its onset in mid‐childhood. Am. J. Med. Genet. 84:125–131, 1999. © 1999 Wiley‐Liss, Inc.</div>
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