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1. Defining the phenotypical spectrum associated with variants in TUBB2A

Author

Brock, S. (Stefanie), Vanderhasselt, T. (Tim), Vermaning, S. (Sietske), Keymolen, K. (Kathelijn), Régal, L. (Luc), Romaniello, R. (Romina), Wieczorek, D. (Dagmar), Storm, T.M. (Tim Matthias), Schaeferhoff, K. (Karin), Hehr, U. (Ute), Kuechler, A. (Alma), Krägeloh-Mann, I. (Ingeborg), Haack, T.B. (Tobias B.), Kasteleijn, E. (Esmee), Schot, R. (Rachel), Mancini, G.M.S. (Grazia), Webster, R. (Richard), Mohammad, S. (Shekeeb), Leventer, R.J. (Richard), Mirzaa, G.M. (Ghayda), Dobyns, W.B. (William), Bahi-Buisson, N. (Nadia), Meuwissen, M.E.C. (Marije), Jansen, A.C. (Anna C.), Stouffs, K. (Katrien), Brock, S. (Stefanie), Vanderhasselt, T. (Tim), Vermaning, S. (Sietske), Keymolen, K. (Kathelijn), Régal, L. (Luc), Romaniello, R. (Romina), Wieczorek, D. (Dagmar), Storm, T.M. (Tim Matthias), Schaeferhoff, K. (Karin), Hehr, U. (Ute), Kuechler, A. (Alma), Krägeloh-Mann, I. (Ingeborg), Haack, T.B. (Tobias B.), Kasteleijn, E. (Esmee), Schot, R. (Rachel), Mancini, G.M.S. (Grazia), Webster, R. (Richard), Mohammad, S. (Shekeeb), Leventer, R.J. (Richard), Mirzaa, G.M. (Ghayda), Dobyns, W.B. (William), Bahi-Buisson, N. (Nadia), Meuwissen, M.E.C. (Marije), Jansen, A.C. (Anna C.), and Stouffs, K. (Katrien)

Abstract

BACKGROUND: Variants in genes belonging to the tubulin superfamily account for a heterogeneous spectrum of brain malformations referred to as tubulinopathies. Variants in TUBB2A have been reported in 10 patients with a broad spectrum of brain imaging features, ranging from a normal cortex to polymicrogyria, while one patient has been reported with progressive atrophy of the cerebellar vermis. METHODS: In order to further refine the phenotypical spectrum associated with TUBB2A, clinical and imaging features of 12 patients with pathogenic TUBB2A variants, recruited via the international network of the authors, were reviewed. RESULTS: We report 12 patients with eight novel and one recurrent variants spread throughout the TUBB2A gene but encoding for amino acids clustering at the protein surface. Eleven patients (91.7%) developed seizures in early life. All patients suffered from intellectual disability, and 11 patients had severe motor developmental delay, with 4 patients (36.4 %) being non-ambulatory. The cerebral cortex was normal in five individuals and showed dysgyria of variable severity in seven patients. Associated brain malformations were less frequent in TUBB2A patients compared with other tubulinopathies. None of the patients had progressive cerebellar atrophy. CONCLUSION: The imaging phenotype associated with pathogenic v

Published
2020
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2. The ARID1B spectrum in 143 patients: from nonsyndromic intellectual disability to Coffin–Siris syndrome

Author

van der Sluijs, E.P.J. (Eline (P.J.)), Jansen, S. (Sandra), Vergano, S.A. (Samantha A.), Adachi-Fukuda, M. (Miho), Alanay, Y. (Yasemin), AlKindy, A. (Adila), Baban, A. (Anwar), Bayat, A. (Allan), Beck-Wödl, S. (Stefanie), Berry, K. (Katherine), Bijlsma, E.K. (Emilia), Bok, L.A. (Levinus), Brouwer, A.F.J. (Alwin F. J.), Burgt, I. (Ineke) van der, Campeau, P.M. (Philippe M.), Canham, N. (Natalie), Chrzanowska, K.H. (Krystyna), Chu, Y.W.Y. (Yoyo W. Y.), Chung, B.H.Y. (Brain H. Y.), Dahan, K. (Karin), De Rademaeker, M. (Marjan), Destrée, A. (Anne), Dudding-Byth, T. (Tracy), Earl, R. (Rachel), Elcioglu, N.H. (Nursel), Elias, E.R. (Ellen R.), Fagerberg, C. (Christina), Gardham, A. (Alice), Gener, B. (Blanca), Gerkes, E.H. (Erica H), Grasshoff, U. (Ute), Haeringen, A. (Arie) van, Heitink, K.R. (Karin R.), Herkert, J.C. (Johanna), Hollander, N.S. (Nicolette) den, Horn, D. (Denise), Hunt, D. (David), Kant, S.G. (Sarina), Kato, M. (Mitsuhiro), Kayserili, H. (Hülya), Kersseboom, R. (Rogier), Kilic, E. (Esra), Krajewska-Walasek, M. (Malgorzata), Lammers, K. (Kylin), Laulund, L.W. (Lone W.), Lederer, D. (Damien), Lees, M.M. (Melissa), López-González, V. (V.), Maas, S.M. (Saskia), Mancini, G.M.S. (Grazia), Marcelis, C.L.M. (Carlo), Martinez, F. (Francisco), Maystadt, I. (Isabelle), McGuire, M. (Marianne), McKee, S., Mehta, S. (Sarju), Metcalfe, K. (Kay), Milunsky, J.M. (Jeff), Mizuno, S. (Seiji), Moeschler, J.B. (John B.), Netzer, C. (Christian), Ockeloen, C. (Charlotte), Oehl-Jaschkowitz, B. (Barbara), Okamoto, N. (Nobuhiko), Olminkhof, S.N.M. (Sharon N. M.), Orellana, C. (Carmen), Pasquier, L. (Laurent), Pottinger, C. (Caroline), Riehmer, V. (Vera), Robertson, S.P. (Stephen), Roifman, M. (Maian), Rooryck, C. (Caroline), Ropers, F.G. (Fabienne G.), Rosello, M. (Monica), Ruivenkamp, C.A. (Claudia), Sagiroglu, M.S. (Mahmut S.), Sallevelt, S.C.E.H. (Suzanne), Sanchis Calvo, A. (Amparo), Simsek-Kiper, P.O. (P.), Soares, G. (Gabriela), Solaeche, L. (Lucia), Mujgan Sonmez, F. (Fatma), Splitt, M. (M.), Steenbeek, D. (Duco), Stegmann, A.P.A. (Alexander P. A.), Stumpel, C. (Connie), Tanabe, S. (Saori), Uctepe, E. (Eyyup), Utine, G.E. (G. Eda), Veenstra-Knol, H.E. (Hermine), Venkateswaran, S. (Sunita), Vilain, C. (Catheline), Vincent-Delorme, C. (Catherine), Vulto-van Silfhout, A.T. (Anneke), Wheeler, P. (Patricia), Wilson, G.N. (Golder N.), Wilson, L.C. (Louise), Wollnik, B. (Bernd), Kosho, T. (Tomoki), Wieczorek, D. (Dagmar), Eichler, E.E. (Evan), Pfundt, R. (Rolph), Vries, B. (Boukje) de, Clayton-Smith, J., Santen, G.W.E. (Gijs), van der Sluijs, E.P.J. (Eline (P.J.)), Jansen, S. (Sandra), Vergano, S.A. (Samantha A.), Adachi-Fukuda, M. (Miho), Alanay, Y. (Yasemin), AlKindy, A. (Adila), Baban, A. (Anwar), Bayat, A. (Allan), Beck-Wödl, S. (Stefanie), Berry, K. (Katherine), Bijlsma, E.K. (Emilia), Bok, L.A. (Levinus), Brouwer, A.F.J. (Alwin F. J.), Burgt, I. (Ineke) van der, Campeau, P.M. (Philippe M.), Canham, N. (Natalie), Chrzanowska, K.H. (Krystyna), Chu, Y.W.Y. (Yoyo W. Y.), Chung, B.H.Y. (Brain H. Y.), Dahan, K. (Karin), De Rademaeker, M. (Marjan), Destrée, A. (Anne), Dudding-Byth, T. (Tracy), Earl, R. (Rachel), Elcioglu, N.H. (Nursel), Elias, E.R. (Ellen R.), Fagerberg, C. (Christina), Gardham, A. (Alice), Gener, B. (Blanca), Gerkes, E.H. (Erica H), Grasshoff, U. (Ute), Haeringen, A. (Arie) van, Heitink, K.R. (Karin R.), Herkert, J.C. (Johanna), Hollander, N.S. (Nicolette) den, Horn, D. (Denise), Hunt, D. (David), Kant, S.G. (Sarina), Kato, M. (Mitsuhiro), Kayserili, H. (Hülya), Kersseboom, R. (Rogier), Kilic, E. (Esra), Krajewska-Walasek, M. (Malgorzata), Lammers, K. (Kylin), Laulund, L.W. (Lone W.), Lederer, D. (Damien), Lees, M.M. (Melissa), López-González, V. (V.), Maas, S.M. (Saskia), Mancini, G.M.S. (Grazia), Marcelis, C.L.M. (Carlo), Martinez, F. (Francisco), Maystadt, I. (Isabelle), McGuire, M. (Marianne), McKee, S., Mehta, S. (Sarju), Metcalfe, K. (Kay), Milunsky, J.M. (Jeff), Mizuno, S. (Seiji), Moeschler, J.B. (John B.), Netzer, C. (Christian), Ockeloen, C. (Charlotte), Oehl-Jaschkowitz, B. (Barbara), Okamoto, N. (Nobuhiko), Olminkhof, S.N.M. (Sharon N. M.), Orellana, C. (Carmen), Pasquier, L. (Laurent), Pottinger, C. (Caroline), Riehmer, V. (Vera), Robertson, S.P. (Stephen), Roifman, M. (Maian), Rooryck, C. (Caroline), Ropers, F.G. (Fabienne G.), Rosello, M. (Monica), Ruivenkamp, C.A. (Claudia), Sagiroglu, M.S. (Mahmut S.), Sallevelt, S.C.E.H. (Suzanne), Sanchis Calvo, A. (Amparo), Simsek-Kiper, P.O. (P.), Soares, G. (Gabriela), Solaeche, L. (Lucia), Mujgan Sonmez, F. (Fatma), Splitt, M. (M.), Steenbeek, D. (Duco), Stegmann, A.P.A. (Alexander P. A.), Stumpel, C. (Connie), Tanabe, S. (Saori), Uctepe, E. (Eyyup), Utine, G.E. (G. Eda), Veenstra-Knol, H.E. (Hermine), Venkateswaran, S. (Sunita), Vilain, C. (Catheline), Vincent-Delorme, C. (Catherine), Vulto-van Silfhout, A.T. (Anneke), Wheeler, P. (Patricia), Wilson, G.N. (Golder N.), Wilson, L.C. (Louise), Wollnik, B. (Bernd), Kosho, T. (Tomoki), Wieczorek, D. (Dagmar), Eichler, E.E. (Evan), Pfundt, R. (Rolph), Vries, B. (Boukje) de, Clayton-Smith, J., and Santen, G.W.E. (Gijs)

Abstract

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 (ARID1B-CSS) 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 web-based 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 ARID1B-ID 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.

Published
2018
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3. De Novo Mutations in SON Disrupt RNA Splicing of Genes Essential for Brain Development and Metabolism, Causing an Intellectual-Disability Syndrome

Author

Kim, J.-H. (Jung-Hyun), Shinde, D.N. (Deepali N.), Reijnders, M.R.F. (Margot R.F.), Hauser, N.S. (Natalie S.), Belmonte, R.L. (Rebecca L.), Wilson, G.R. (Gregory R.), Bosch, D.G.M. (Daniëlle G.M.), Bubulya, P.A. (Paula A.), Shashi, V. (Vandana), Petrovski, S. (Slavé), Stone, J.K. (Joshua K.), Park, E.Y. (Eun Young), Veltman, J.A. (Joris), Sinnema, M. (Margje), Stumpel, C. (Connie), Draaisma, J. (Jos), Nicolai, J. (Joost), Yntema, H.G., Lindstrom, K. (Kristin), Vries, B. (Boukje) de, Jewett, T. (Tamison), Santoro, S.L. (Stephanie L.), Vogt, J. (Julie), Bachman, K.K. (Kristine K.), Seeley, A.H. (Andrea ), Krokosky, A. (Alyson), Turner, C. (Clesson), Rohena, L. (Luis), Hempel, M. (Maja), Kortüm, F. (Fanny), Lessel, D. (Davor), Neu, A. (Axel), Strom, T.M. (Tim), Wieczorek, D. (Dagmar), Bramswig, N. (Nuria), Laccone, F.A. (Franco A.), Behunova, J. (Jana), Rehder, H. (Helga), Gordon, C.T. (Christopher T.), Rio, M. (Marlène), Romana, S. (Serge), Tang, S. (Sha), El-Khechen, D. (Dima), Cho, M.T. (Megan T.), McWalter, K. (Kirsty), Douglas, G. (Ganka), Baskin, B. (Berivan), Begtrup, A. (Amber), Funari, T. (Tara), Schoch, K. (Kelly), Stegmann, A.P.A. (Alexander P.A.), Stevens, S.J., Zhang, D.-E. (Dong-Er), Traver, D. (David), Yao, X. (Xu), MacArthur, D.G. (Daniel G.), Brunner, H.G., Mancini, G.M.S. (Grazia), Myers, R.H. (Richard), Owen, L.B. (Laurie B.), Lim, S.-T. (Ssang-Taek), Stachura, D.L. (David L.), Vissers, L.E.L.M., Ahn, E.-Y.E. (Eun-Young Erin), Kim, J.-H. (Jung-Hyun), Shinde, D.N. (Deepali N.), Reijnders, M.R.F. (Margot R.F.), Hauser, N.S. (Natalie S.), Belmonte, R.L. (Rebecca L.), Wilson, G.R. (Gregory R.), Bosch, D.G.M. (Daniëlle G.M.), Bubulya, P.A. (Paula A.), Shashi, V. (Vandana), Petrovski, S. (Slavé), Stone, J.K. (Joshua K.), Park, E.Y. (Eun Young), Veltman, J.A. (Joris), Sinnema, M. (Margje), Stumpel, C. (Connie), Draaisma, J. (Jos), Nicolai, J. (Joost), Yntema, H.G., Lindstrom, K. (Kristin), Vries, B. (Boukje) de, Jewett, T. (Tamison), Santoro, S.L. (Stephanie L.), Vogt, J. (Julie), Bachman, K.K. (Kristine K.), Seeley, A.H. (Andrea ), Krokosky, A. (Alyson), Turner, C. (Clesson), Rohena, L. (Luis), Hempel, M. (Maja), Kortüm, F. (Fanny), Lessel, D. (Davor), Neu, A. (Axel), Strom, T.M. (Tim), Wieczorek, D. (Dagmar), Bramswig, N. (Nuria), Laccone, F.A. (Franco A.), Behunova, J. (Jana), Rehder, H. (Helga), Gordon, C.T. (Christopher T.), Rio, M. (Marlène), Romana, S. (Serge), Tang, S. (Sha), El-Khechen, D. (Dima), Cho, M.T. (Megan T.), McWalter, K. (Kirsty), Douglas, G. (Ganka), Baskin, B. (Berivan), Begtrup, A. (Amber), Funari, T. (Tara), Schoch, K. (Kelly), Stegmann, A.P.A. (Alexander P.A.), Stevens, S.J., Zhang, D.-E. (Dong-Er), Traver, D. (David), Yao, X. (Xu), MacArthur, D.G. (Daniel G.), Brunner, H.G., Mancini, G.M.S. (Grazia), Myers, R.H. (Richard), Owen, L.B. (Laurie B.), Lim, S.-T. (Ssang-Taek), Stachura, D.L. (David L.), Vissers, L.E.L.M., and Ahn, E.-Y.E. (Eun-Young Erin)

Abstract

The overall understanding of the molecular etiologies of intellectual disability (ID) and developmental delay (DD) is increasing as next-generation sequencing technologies identify genetic variants in individuals with such disorders. However, detailed analyses c

Published
2016
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4. WDR73 Mutations Cause Infantile Neurodegeneration and Variable Glomerular Kidney Disease

Author

Vodopiutz, J. (Julia), Seidl, R. (Rainer), Prayer, D. (Daniela), Khan, M.I. (M. Imran), Mayr, J.A. (Johannes A.), Streubel, B. (Berthold), Steiß, J.-O. (Jens-Oliver), Hahn, A. (Andreas), Csaicsich, D. (Dagmar), Castro, C. (Christel), Assoum, M. (Mirna), Müller, T. (Thomas), Wieczorek, D. (Dagmar), Mancini, G.M.S. (Grazia), Sadowski, C.E. (Carolin E.), Lévy, N. (Nicolas), Megarbane, A. (Andre), Godbole, K. (Koumudi), Schanze, D. (Denny), Hildebrandt, F. (Friedhelm), Delague, V. (Valérie), Janecke, A.R. (Andreas), Zenker, M. (Martin), Vodopiutz, J. (Julia), Seidl, R. (Rainer), Prayer, D. (Daniela), Khan, M.I. (M. Imran), Mayr, J.A. (Johannes A.), Streubel, B. (Berthold), Steiß, J.-O. (Jens-Oliver), Hahn, A. (Andreas), Csaicsich, D. (Dagmar), Castro, C. (Christel), Assoum, M. (Mirna), Müller, T. (Thomas), Wieczorek, D. (Dagmar), Mancini, G.M.S. (Grazia), Sadowski, C.E. (Carolin E.), Lévy, N. (Nicolas), Megarbane, A. (Andre), Godbole, K. (Koumudi), Schanze, D. (Denny), Hildebrandt, F. (Friedhelm), Delague, V. (Valérie), Janecke, A.R. (Andreas), and Zenker, M. (Martin)

Abstract

Infantile-onset cerebellar atrophy (CA) is a clinically and genetically heterogeneous trait. Galloway-Mowat syndrome (GMS) is a rare autosomal recessive disease, characterized by microcephaly with brain anomalies including CA in some cases, intellectual disability, and early-infantile-onset nephrotic syndrome. Very recently, WDR73 deficiency was identified as the cause of GMS in five individuals. To evaluate the role of WDR73 mutations as a cause of GMS and other forms of syndromic CA, we performed Sanger or exome sequencing in 51 unrelated patients with CA and variable brain anomalies and in 40 unrelated patients with a diagnosis of GMS. We identified 10 patients from three CA and from two GMS families with WDR73 mutations including the original family described with CA, mental retardation, optic atrophy, and skin abnormalities (CAMOS). There were five novel mutations, of which two were truncating and three were missense mutations affecting highly conserved residues. Individuals carrying homozygous WDR73 mutations mainly presented with a pattern of neurological and neuroimaging findings as well as intellectual disability, while kidney involvement was variable. We document postnatal onset of CA, a retinopathy, basal ganglia degeneration, and short stature as novel features of WDR73-related disease, and define WDR73-related disease as a new entity of infantile neurodegeneration.

Published
2015
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