The authors declared they have no conflict of interest.
Clinical and genetic study of a family with a paternally inherited 15q11–q13 duplication
Article first published online: 30 APR 2013
Copyright © 2013 Wiley Periodicals, Inc.
American Journal of Medical Genetics Part A
Volume 161, Issue 6, pages 1459–1464, June 2013
How to Cite
2013. Clinical and genetic study of a family with a paternally inherited 15q11–q13 duplication. Am J Med Genet Part A 161A:1459–1464., , , , , , , , .
- Issue published online: 22 MAY 2013
- Article first published online: 30 APR 2013
- Manuscript Accepted: 25 JAN 2013
- Manuscript Received: 25 OCT 2012
- chromosome 15q11–q13;
- parental origin;
- intellectual disability
Interstitial chromosome 15q11–q13 duplications are associated with developmental delay, behavioral problems and additional manifestations, including epilepsy. In most affected individuals the duplicated chromosome is maternally derived, whereas paternal inheritance is more often associated with a normal phenotype. Seizures have not been described in patients with paternal dup 15q11–q13. We describe a family with five individuals in three generations with a paternally-inherited 15q11–q13 duplication, four of whom exhibited abnormal phenotypic characteristics, including seizures. The 18-year-old female proband presented with moderate intellectual disability, obesity, and epilepsy. Her brother manifested learning disability and behavioral problems. They both inherited the 15q11–q13 dup from their father who had a normal phenotype. Their paternal uncle and grandfather also had the duplication and were reported to have had seizures. Array-CGH and MLPA analyses showed that the duplication included the TUBGCP5, CYFIP1, MKRN3, MAGEL2, NDN, SNRPN, UBE3A, ATP10A, GABRB3, GABRA5, GABRG3, and OCA2 genes. This report provides evidence for intrafamilial phenotypic variability of paternal dup 15q11–q13, ranging from normal to intellectual disability and seizures, and potentially expanding the phenotype of paternal 15q11–q13 interstitial duplications. © 2013 Wiley Periodicals, Inc.