Browsing by Author "Thiele, Holger"

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    A comprehensive molecular study on Coffin-Siris and Nicolaides-Baraitser syndromes identifies a broad molecular and clinical spectrum converging on altered chromatin remodeling
    (OXFORD UNIV PRESS, 2013-01-01) Wieczorek, Dagmar; Boegershausen, Nina; Beleggia, Filippo; Steiner-Haldenstaett, Sabine; Pohl, Esther; Li, Yun; Milz, Esther; Martin, Marcel; Thiele, Holger; Altmueller, Janine; Alanay, Yasemin; Kayserili, Hulya; Klein-Hitpass, Ludger; Bohringer, Stefan; Wollstein, Andreas; Albrecht, Beate; Boduroglu, Koray; Caliebe, Almuth; Chrzanowska, Krystyna; Cogulu, Ozgur; Cristofoli, Francesca; Czeschik, Johanna Christina; Devriendt, Koenraad; Dotti, Maria Teresa; Elcioglu, Nursel; Gener, Blanca; Goecke, Timm O.; Krajewska-Walasek, Malgorzata; Guillen-Navarro, Encarnacion; Hayek, Joussef; Houge, Gunnar; Kilic, Esra; Simsek-Kiper, Pelin Ozlem; Lopez-Gonzalez, Vanesa; Kuechler, Alma; Lyonnet, Stanislas; Mari, Francesca; Marozza, Annabella; Dramard, Michele Mathieu; Mikat, Barbara; Morin, Gilles; Morice-Picard, Fanny; Ozkinay, Ferda; Rauch, Anita; Renieri, Alessandra; Tinschert, Sigrid; Utine, G. Eda; Vilain, Catheline; Vivarelli, Rossella; Zweier, Christiane; Nuernberg, Peter; Rahmann, Sven; Vermeesch, Joris; Luedecke, Hermann-Josef; Zeschnigk, Michael; Wollnik, Bernd
    Chromatin remodeling complexes are known to modify chemical marks on histones or to induce conformational changes in the chromatin in order to regulate transcription. Denovodominant mutations in different members of the SWI/SNF chromatin remodeling complex have recently been described in individuals with Coffin-Siris (CSS) and Nicolaides-Baraitser (NCBRS) syndromes. Using a combination of whole-exome sequencing, NGS-based sequencing of 23 SWI/SNF complex genes, and molecular karyotyping in 46 previously undescribed individuals with CSS and NCBRS, we identified a de novo 1-bp deletion (c.677delG, p.Gly226Glufs{*}53) and a de novo missense mutation (c.914G>T, p.Cys305Phe) in PHF6 in two individuals diagnosed with CSS. PHF6 interacts with the nucleosome remodeling and deacetylation ( NuRD) complex implicating dysfunction of a second chromatin remodeling complex in the pathogenesis of CSS-like phenotypes. Altogether, we identified mutations in 60\% of the studied individuals (28/46), located in the genes ARID1A, ARID1B, SMARCB1, SMARCE1, SMARCA2, and PHF6. We show that mutations in ARID1B are the main cause of CSS, accounting for 76\% of identified mutations. ARID1B and SMARCB1 mutations were also found in individuals with the initial diagnosis of NCBRS. These individuals apparently belong to a small subset who display an intermediate CSS/NCBRS phenotype. Our proposed genotype-phenotype correlations are important for molecular screening strategies.
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    Rare coding variants in genes encoding GABA(A) receptors in genetic generalised epilepsies: an exome-based case-control study
    (ELSEVIER SCIENCE INC, 2018-01-01) May, Patrick; Girard, Simon; Harrer, Merle; Bobbili, Dheeraj R.; Schubert, Julian; Wolking, Stefan; Becker, Felicitas; Lachance-Touchette, Pamela; Meloche, Caroline; Gravel, Micheline; Niturad, Cristina E.; Knaus, Julia; De Kovel, Carolien; Toliat, Mohamad; Polvi, Anne; Iacomino, Michele; Guerrero-Lopez, Rosa; Baulac, Stephanie; Marini, Carla; Thiele, Holger; Altmueller, Janine; Jabbari, Kamel; Ruppert, Ann-Kathrin; Jurkowski, Wiktor; Lal, Dennis; Rusconi, Raffaella; Cestele, Sandrine; Terragni, Benedetta; Coombs, Ian D.; Reid, Christopher A.; Striano, Pasquale; Caglayan, Hande; Siren, Auli; Everett, Kate; Moller, Rikke S.; Hjalgrim, Helle; Muhle, Hiltrud; Helbig, Ingo; Kunz, Wolfram S.; Weber, Yvonne G.; Weckhuysen, Sarah; De Jonghe, Peter; Sisodiya, Sanjay M.; Nabbout, Rima; Franceschetti, Silvana; Coppola, Antonietta; Vari, Maria S.; Trenite, Dorothee Kasteleijn-Nolst; Baykan, Betul; Ozbek, Ugur; Bebek, Nerses; Klein, Karl M.; Rosenow, Felix; Nguyen, Dang K.; Dubeau, Francois; Carmant, Lionel; Lortie, Anne; Desbiens, Richard; Clement, Jean-Francois; Cieuta-Walti, Cecile; Sills, Graeme J.; Auce, Pauls; Francis, Ben; Johnson, Michael R.; Marson, Anthony G.; Berghuis, Bianca; Sander, Josemir W.; Avbersek, Andreja; McCormack, Mark; Cavalleri, Gianpiero L.; Delanty, Norman; Depondt, Chantal; Krenn, Martin; Zimprich, Fritz; Peter, Sarah; Nikanorova, Marina; Kraaij, Robert; van Rooij, Jeroen; Balling, Rudi; Ikram, M. Arfan; Uitterlinden, Andre G.; Avanzini, Giuliano; Schorge, Stephanie; Petrou, Steven; Mantegazza, Massimo; Sander, Thomas; LeGuern, Eric; Serratosa, Jose M.; Koeleman, Bobby P. C.; Palotie, Aarno; Lehesjoki, Anna-Elina; Nothnagel, Michael; Nuernberg, Peter; Maljevic, Snezana; Zara, Federico; Cossette, Patrick; Krause, Roland; Lerche, Holger; Consortium, Epicure; Consortium, EuroEP.I.N.O.M.I.C.S. C. O. G. I. E.; Consortium, EpiPG. X.
    Background Genetic generalised epilepsy is the most common type of inherited epilepsy. Despite a high concordance rate of 80\% in monozygotic twins, the genetic background is still poorly understood. We aimed to investigate the burden of rare genetic variants in genetic generalised epilepsy. Methods For this exome-based case-control study, we used three different genetic generalised epilepsy case cohorts and three independent control cohorts, all of European descent. Cases included in the study were clinically evaluated for genetic generalised epilepsy. Whole-exome sequencing was done for the discovery case cohort, a validation case cohort, and two independent control cohorts. The replication case cohort underwent targeted next-generation sequencing of the 19 known genes encoding subunits of GABA(A) receptors and was compared to the respective GABA(A) receptor variants of a third independent control cohort. Functional investigations were done with automated two-microelectrode voltage clamping in Xenopus laevis oocytes. Findings Statistical comparison of 152 familial index cases with genetic generalised epilepsy in the discovery cohort to 549 ethnically matched controls suggested an enrichment of rare missense (Nonsyn) variants in the ensemble of 19 genes encoding GABA(A) receptors in cases (odds ratio {[}OR] 2.40 {[}95\% CI 1.41-4.10]