Browsing by Author "Wieczorek, Dagmar"

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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.
Haploinsufficiency of a Spliceosomal GTPase Encoded by EFTUD2 Causes Mandibulofacial Dysostosis with Microcephaly
(CELL PRESS, 2012-01-01) Lines, Matthew A.; Huang, Lijia; Schwartzentruber, Jeremy; Douglas, Stuart L.; Lynch, Danielle C.; Beaulieu, Chandree; Guion-Almeida, Maria Leine; Zechi-Ceide, Roseli Maria; Gener, Blanca; Gillessen-Kaesbach, Gabriele; Nava, Caroline; Baujat, Genevieve; Horn, Denise; Kini, Usha; Caliebe, Almuth; Alanay, Yasemin; Utine, Gulen Eda; Lev, Dorit; Kohlhase, Jurgen; Grix, Arthur W.; Lohmann, Dietmar R.; Hehr, Ute; Boehm, Detlef; Majewski, Jacek; Bulman, Dennis E.; Wieczorek, Dagmar; Boycott, Kym M.; Consortium, F.O.R.G.E. Canada
Mandibulofacial dysostosis with microcephaly (MFDM) is a rare sporadic syndrome comprising craniofacial malformations, microcephaly, developmental delay, and a recognizable dysmorphic appearance. Major sequelae, including choanal atresia, sensorineural hearing loss, and cleft palate, each occur in a significant proportion of affected individuals. We present detailed clinical findings in 12 unrelated individuals with MFDM
RAP1-mediated MEK/ERK pathway defects in Kabuki syndrome
(AMER SOC CLINICAL INVESTIGATION INC, 2015-01-01) Boegershausen, Nina; Tsai, I.-Chun; Pohl, Esther; Kiper, Pelin Ozlem Simsek; Beleggia, Filippo; Percin, E. Ferda; Keupp, Katharina; Matchan, Angela; Milz, Esther; Alanay, Yasemin; Kayserili, Hulya; Liu, Yicheng; Banka, Siddharth; Kranz, Andrea; Zenker, Martin; Wieczorek, Dagmar; Elcioglu, Nursel; Prontera, Paolo; Lyonnet, Stanislas; Meitinger, Thomas; Stewart, A. Francis; Donnai, Dian; Strom, Tim M.; Boduroglu, Koray; Yigit, Goekhan; Li, Yun; Katsanis, Nicholas; Wollnik, Bernd
The genetic disorder Kabuki syndrome (KS) is characterized by developmental delay and congenital anomalies. Dominant mutations in the chromatin regulators lysine (K)-specific methyltransferase 2D (KMT2D) (also known as MLL2) and lysine (K)-specific demethylase 6A (KDM6A) underlie the majority of cases. Although the functions of these chromatin-modifying proteins have been studied extensively, the physiological systems regulated by them are largely unknown. Using whole-exome sequencing, we identified a mutation in RAP1A that was converted to homozygosity as the result of uniparental isodisomy (UPD) in a patient with KS and a de novo, dominant mutation in RAP1B in a second individual with a KS-like phenotype. We elucidated a genetic and functional interaction between the respective KS-associated genes and their products in zebrafish models and patient cell lines. Specifically, we determined that dysfunction of known KS genes and the genes identified in this study results in aberrant MEK/ERK signaling as well as disruption of F-actin polymerization and cell intercalation. Moreover, these phenotypes could be rescued in zebrafish models by rebalancing MEK/ERK signaling via administration of small molecule inhibitors of MEK. Taken together, our studies suggest that the KS pathophysiology overlaps with the RASopathies and provide a potential direction for treatment design.
The ARID1B spectrum in 143 patients: from nonsyndromic intellectual disability to Coffin-Siris syndrome
(SPRINGERNATURE, 2019-01-01) van der Sluijs, Pleuntje J.; Jansen, Sandra; Vergano, Samantha A.; Adachi-Fukuda, Miho; Alanay, Yasemin; AlKindy, Adila; Baban, Anwar; Bayat, Allan; Beck-Woedl, Stefanie; Berry, Katherine; Bijlsma, Emilia K.; Bok, Levinus A.; Brouwer, Alwin F. J.; van der Burgt, Ineke; Campeau, Philippe M.; Canham, Natalie; Chrzanowska, Krystyna; Chu, Yoyo W. Y.; Chung, Brain H. Y.; Dahan, Karin; De Rademaeker, Marjan; Destree, Anne; Dudding-Byth, Tracy; Earl, Rachel; Elcioglu, Nursel; Elias, Ellen R.; Fagerberg, Christina; Gardham, Alice; Gener, Blanca; Gerkes, Erica H.; Grasshoff, Ute; van Haeringen, Arie; Heitink, Karin R.; Herkert, Johanna C.; den Hollander, Nicolette S.; Horn, Denise; Hunt, David; Kant, Sarina G.; Kato, Mitsuhiro; Kayserili, Hulya; Kersseboom, Rogier; Kilic, Esra; Krajewska-Walasek, Malgorzata; Lammers, Kylin; Laulund, Lone W.; Lederer, Damien; Lees, Melissa; Lopez-Gonzalez, Vanesa; Maas, Saskia; Mancini, Grazia M. S.; Marcelis, Carlo; Martinez, Francisco; Maystadt, Isabelle; McGuire, Marianne; McKee, Shane; Mehta, Sarju; Metcalfe, Kay; Milunsky, Jeff; Mizuno, Seiji; Moeschler, John B.; Netzer, Christian; Ockeloen, Charlotte W.; Oehl-Jaschkowitz, Barbara; Okamoto, Nobuhiko; Olminkhof, Sharon N. M.; Orellana, Carmen; Pasquier, Laurent; Pottinger, Caroline; Riehmer, Vera; Robertson, Stephen P.; Roifman, Maian; Rooryck, Caroline; Ropers, Fabienne G.; Rosello, Monica; Ruivenkamp, Claudia A. L.; Sagiroglu, Mahmut S.; Sallevelt, Suzanne C. E. H.; Sanchis Calvo, Amparo; Simsek-Kiper, Pelin O.; Soares, Gabriela; Solaeche, Lucia; Sonmez, Fatma Mujgan; Splitt, Miranda; Steenbeek, Duco; Stegmann, Alexander P. A.; Stumpel, Constance T. R. M.; Tanabe, Saori; Uctepe, Eyyup; Utine, G. Eda; Veenstra-Knol, Hermine E.; Venkateswaran, Sunita; Vilain, Catheline; Vincent-Delorme, Catherine; Vulto-van Silfhout, Anneke T.; Wheeler, Patricia; Wilson, Golder N.; Wilson, Louise C.; Wollnik, Bernd; Kosho, Tomoki; Wieczorek, Dagmar; Eichler, Evan; Pfundt, Rolph; de Vries, Bert B. A.; Clayton-Smith, Jill; Santen, Gijs W. E.
Purpose: Pathogenic variants in ARID1B are one of the most frequent causes of intellectual disability (ID) as determined by large-scale exome sequencing studies. Most studies published thus far describe clinically diagnosed Coffin-Siris patients (ARID1BCSS) and it is unclear whether these data are representative for patients identified through sequencing of unbiased ID cohorts (ARID1B-ID). We therefore sought to determine genotypic and phenotypic differences between ARID1B-ID and ARID1B-CSS. In parallel, we investigated the effect of different methods of phenotype reporting. Methods: Clinicians entered clinical data in an extensive webbased survey. Results: 79 ARID1B-CSS and 64 ARID1B-ID patients were included. CSS-associated dysmorphic features, such as thick eyebrows, long eyelashes, thick alae nasi, long and/or broad philtrum, small nails and small or absent fifth distal phalanx and hypertrichosis, were observed significantly more often (p < 0.001) in ARID1B-CSS patients. No other significant differences were identified. Conclusion: There are only minor differences between ARID1BID and ARID1B-CSS patients. ARID1B-related disorders seem to consist of a spectrum, and patients should be managed similarly. We demonstrated that data collection methods without an explicit option to report the absence of a feature (such as most Human Phenotype Ontology-based methods) tended to underestimate gene-related features.
The ARID1B spectrum in 143 patients: from nonsyndromic intellectual disability to Coffin-Siris syndrome (vol 21, pg 1295, 2019)
(NATURE PUBLISHING GROUP, 2019-01-01) van der Sluijs, Pleuntje J.; Jansen, Sandra; Vergano, Samantha A.; Adachi-Fukuda, Miho; Alanay, Yasemin; AlKindy, Adila; Baban, Anwar; Bayat, Allan; Beck-Woedl, Stefanie; Berry, Katherine; Bijlsma, Emilia K.; Bok, Levinus A.; Brouwer, Alwin F. J.; van der Burgt, Ineke; Campeau, Philippe M.; Canham, Natalie; Chrzanowska, Krystyna; Chu, Yoyo W. Y.; Chung, Brain H. Y.; Dahan, Karin; De Rademaeker, Marjan; Destree, Anne; Dudding-Byth, Tracy; Earl, Rachel; Elcioglu, Nursel; Elias, Ellen R.; Fagerberg, Christina; Gardham, Alice; Gener, Blanca; Gerkes, Erica H.; Grasshoff, Ute; van Haeringen, Arie; Heitink, Karin R.; Herkert, Johanna C.; den Hollander, Nicolette S.; Horn, Denise; Hunt, David; Kant, Sarina G.; Kato, Mitsuhiro; Kayserili, Hulya; Kersseboom, Rogier; Kilic, Esra; Krajewska-Walasek, Malgorzata; Lammers, Kylin; Laulund, Lone W.; Lederer, Damien; Lees, Melissa; Lopez-Gonzalez, Vanesa; Maas, Saskia; Mancini, Grazia M. S.; Marcelis, Carlo; Martinez, Francisco; Maystadt, Isabelle; McGuire, Marianne; Mckee, Shane; Mehta, Sarju; Metcalfe, Kay; Milunsky, Jeff; Mizuno, Seiji; Moeschler, John B.; Netzer, Christian; Ockeloen, Charlotte W.; Oehl-Jaschkowitz, Barbara; Okamoto, Nobuhiko; Olminkhof, Sharon N. M.; Orellana, Carmen; Pasquier, Laurent; Pottinger, Caroline; Riehmer, Vera; Robertson, Stephen P.; Roifman, Maian; Rooryck, Caroline; Ropers, Fabienne G.; Rosello, Monica; Ruivenkamp, Claudia A. L.; Sagiroglu, Mahmut S.; Sallevelt, Suzanne C. E. H.; Calvo, Amparo Sanchis; Simsek-Kiper, Pelin O.; Soares, Gabriela; Solaeche, Lucia; Sonmez, Fatma Mujgan; Splitt, Miranda; Steenbeek, Duco; Stegmann, Alexander P. A.; Stumpel, Constance T. R. M.; Tanabe, Saori; Uctepe, Eyyup; Utine, G. Eda; Veenstra-Knol, Hermine E.; Venkateswaran, Sunita; Vilain, Catheline; Vincent-Delorme, Catherine; Vulto-van Silfhout, Anneke T.; Wheeler, Patricia; Wilson, Golder N.; Wilson, Louise C.; Wollnik, Bernd; Kosho, Tomoki; Wieczorek, Dagmar; Eichler, Evan; Pfundt, Rolph; de Vries, Bert B. A.; Clayton-Smith, Jill; Santen, Gijs W. E.