16p11.2 600 kb Duplications confer risk for typical and atypical Rolandic epilepsy

Reinthaler, Eva M; Lal, Dennis; Lebon, Sebastien; Hildebrand, Michael S; Dahl, Hans-Henrik M; Regan, Brigid M; Feucht, Martha; Steinböck, Hannelore; Neophytou, Birgit; Ronen, Gabriel M; Roche, Laurian; Gruber-Sedlmayr, Ursula; Geldner, Julia; Haberlandt, Edda; Hoffmann, Per; Herms, Stefan; Gieger, Christian; Waldenberger, Melanie; Franke, Andre; Wittig, Michael; ... (2014). 16p11.2 600 kb Duplications confer risk for typical and atypical Rolandic epilepsy. Human molecular genetics, 23(22), pp. 6069-6080. Oxford University Press 10.1093/hmg/ddu306

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Rolandic epilepsy (RE) is the most common idiopathic focal childhood epilepsy. Its molecular basis is largely unknown and a complex genetic etiology is assumed in the majority of affected individuals. The present study tested whether six large recurrent copy number variants at 1q21, 15q11.2, 15q13.3, 16p11.2, 16p13.11 and 22q11.2 previously associated with neurodevelopmental disorders also increase risk of RE. Our association analyses revealed a significant excess of the 600 kb genomic duplication at the 16p11.2 locus (chr16: 29.5-30.1 Mb) in 393 unrelated patients with typical (n = 339) and atypical (ARE; n = 54) RE compared with the prevalence in 65,046 European population controls (5/393 cases versus 32/65,046 controls; Fisher's exact test P = 2.83 × 10(-6), odds ratio = 26.2, 95% confidence interval: 7.9-68.2). In contrast, the 16p11.2 duplication was not detected in 1738 European epilepsy patients with either temporal lobe epilepsy (n = 330) and genetic generalized epilepsies (n = 1408), suggesting a selective enrichment of the 16p11.2 duplication in idiopathic focal childhood epilepsies (Fisher's exact test P = 2.1 × 10(-4)). In a subsequent screen among children carrying the 16p11.2 600 kb rearrangement we identified three patients with RE-spectrum epilepsies in 117 duplication carriers (2.6%) but none in 202 carriers of the reciprocal deletion. Our results suggest that the 16p11.2 duplication represents a significant genetic risk factor for typical and atypical RE.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR)
04 Faculty of Medicine > Department of Gynaecology, Paediatrics and Endocrinology (DFKE) > Clinic of Paediatric Medicine

UniBE Contributor:

Beckmann, Jacques

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0964-6906

Publisher:

Oxford University Press

Language:

English

Submitter:

André Schaller

Date Deposited:

19 Mar 2015 12:19

Last Modified:

19 Mar 2015 12:19

Publisher DOI:

10.1093/hmg/ddu306

PubMed ID:

24939913

URI:

https://boris.unibe.ch/id/eprint/65365

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