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1. Natural history of KBG syndrome in a large European cohort

Author

Loberti, L. (Lorenzo), Bruno, L. P. (Lucia Pia), Granata, S. (Stefania), Doddato, G. (Gabriella), Resciniti, S. (Sara), Fava, F. (Francesca), Carullo, M. (Michele), Rahikkala, E. (Elisa), Jouret, G. (Guillaume), Menke, L. A. (Leonie A.), Lederer, D. (Damien), Vrielynck, P. (Pascal), Ryba, L. (Lukáš), Brunetti-Pierri, N. (Nicola), Lasa-Aranzasti, A. (Amaia), Cueto-González, A. M. (Anna Maria), Trujillano, L. (Laura), Valenzuela, I. (Irene), Tizzano, E. F. (Eduardo F.), Spinelli, A. M. (Alessandro Mauro), Bruno, I. (Irene), Currò, A. (Aurora), Stanzial, F. (Franco), Benedicenti, F. (Francesco), Lopergolo, D. (Diego), Santorelli, F. M. (Filippo Maria), Aristidou, C. (Constantia), Tanteles, G. A. (George A.), Maystadt, I. (Isabelle), Tkemaladze, T. (Tinatin), Reimand, T. (Tiia), Lokke, H. (Helen), Õunap, K. (Katrin), Haanpää, M. K. (Maria K.), Holubová, A. (Andrea), Zoubková, V. (Veronika), Schwarz, M. (Martin), Žordania, R. (Riina), Muru, K. (Kai), Roht, L. (Laura), Tihveräinen, A. (Annika), Teek, R. (Rita), Thomson, U. (Ulvi), Atallah, I. (Isis), Superti-Furga, A. (Andrea), Buoni, S. (Sabrina), Canitano, R. (Roberto), Scandurra, V. (Valeria), Rossetti, A. (Annalisa), Grosso, S. (Salvatore), Battini, R. (Roberta), Baldassarri, M. (Margherita), Mencarelli, M. A. (Maria Antonietta), Lo Rizzo, C. (Caterina), Bruttini, M. (Mirella), Mari, F. (Francesca), Ariani, F. (Francesca), Renieri, A. (Alessandra), Pinto, A. M. (Anna Maria), Loberti, L. (Lorenzo), Bruno, L. P. (Lucia Pia), Granata, S. (Stefania), Doddato, G. (Gabriella), Resciniti, S. (Sara), Fava, F. (Francesca), Carullo, M. (Michele), Rahikkala, E. (Elisa), Jouret, G. (Guillaume), Menke, L. A. (Leonie A.), Lederer, D. (Damien), Vrielynck, P. (Pascal), Ryba, L. (Lukáš), Brunetti-Pierri, N. (Nicola), Lasa-Aranzasti, A. (Amaia), Cueto-González, A. M. (Anna Maria), Trujillano, L. (Laura), Valenzuela, I. (Irene), Tizzano, E. F. (Eduardo F.), Spinelli, A. M. (Alessandro Mauro), Bruno, I. (Irene), Currò, A. (Aurora), Stanzial, F. (Franco), Benedicenti, F. (Francesco), Lopergolo, D. (Diego), Santorelli, F. M. (Filippo Maria), Aristidou, C. (Constantia), Tanteles, G. A. (George A.), Maystadt, I. (Isabelle), Tkemaladze, T. (Tinatin), Reimand, T. (Tiia), Lokke, H. (Helen), Õunap, K. (Katrin), Haanpää, M. K. (Maria K.), Holubová, A. (Andrea), Zoubková, V. (Veronika), Schwarz, M. (Martin), Žordania, R. (Riina), Muru, K. (Kai), Roht, L. (Laura), Tihveräinen, A. (Annika), Teek, R. (Rita), Thomson, U. (Ulvi), Atallah, I. (Isis), Superti-Furga, A. (Andrea), Buoni, S. (Sabrina), Canitano, R. (Roberto), Scandurra, V. (Valeria), Rossetti, A. (Annalisa), Grosso, S. (Salvatore), Battini, R. (Roberta), Baldassarri, M. (Margherita), Mencarelli, M. A. (Maria Antonietta), Lo Rizzo, C. (Caterina), Bruttini, M. (Mirella), Mari, F. (Francesca), Ariani, F. (Francesca), Renieri, A. (Alessandra), and Pinto, A. M. (Anna Maria)

Abstract

KBG syndrome (KBGS) is characterized by distinctive facial gestalt, short stature and variable clinical findings. With ageing, some features become more recognizable, allowing a differential diagnosis. We aimed to better characterize natural history of KBGS. In the context of a European collaborative study, we collected the largest cohort of KBGS patients (49). A combined array- based Comparative Genomic Hybridization and next generation sequencing (NGS) approach investigated both genomic Copy Number Variants and SNVs. Intellectual disability (ID) (82%) ranged from mild to moderate with severe ID identified in two patients. Epilepsy was present in 26.5%. Short stature was consistent over time, while occipitofrontal circumference (median value: −0.88 SD at birth) normalized over years. Cerebral anomalies, were identified in 56% of patients and thus represented the second most relevant clinical feature reinforcing clinical suspicion in the paediatric age when short stature and vertebral/dental anomalies are vague. Macrodontia, oligodontia and dental agenesis (53%) were almost as frequent as skeletal anomalies, such as brachydactyly, short fifth finger, fifth finger clinodactyly, pectus excavatum/carinatum, delayed bone age. In 28.5% of individuals, prenatal ultrasound anomalies were reported. Except for three splicing variants, leading to a premature termination, variants were almost all frameshift. Our results, broadening the spectrum of KBGS phenotype progression, provide useful tools to facilitate differential diagnosis and improve clinical management. We suggest to consider a wider range of dental anomalies before excluding diagnosis and to perform a careful odontoiatric/ear-nose-throat (ENT) evaluation in order to look for even submucosal palate cleft given the high percentage of palate abnormalities. NGS approaches, following evidence of antenatal ultrasound anomalies, should include ANKRD11.

Published
2022

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. Genetic and phenotypic heterogeneity suggest therapeutic implications in SCN2A-related disorders

Author

Wolff, M. (Markus), Johannesen, K.M. (Katrine M.), Hedrich, U.B.S. (Ulrike B. S.), Masnada, S. (Silvia), Rubboli, G. (Guido), Gardella, E. (Elena), Lesca, G. (Gaetan), Ville, D. (Dorothée), Milh, M. (Mathieu), Villard, L. (Laurent), Afenjar, A. (Alexandra), Chantot-Bastaraud, S. (Sandra), Mignot, A., Lardennois, C. (Caroline), Nava, C. (Caroline), Schwarz, N. (Niklas), Gérard, M. (Marion), Perrin, L. (Laurence), Doummar, D. (Diane), Auvin, S. (Stéphane), Miranda, M.J. (Maria J.), Hempel, M. (Maja), Brilstra, E. (Eva), Knoers, N.V.A.M. (Nine), Verbeek, N.E. (Nienke), Kempen, M.J.A. (M. J A) van, Braun, K.P. (Kees P.), Mancini, G.M.S. (Grazia), Biskup, S. (Saskia), Hörtnagel, K. (Konstanze), Döcker, M. (Miriam), Bast, T. (Thomas), Loddenkemper, T. (Tobias), Wong-Kisiel, L. (Lily), Baumeister, F.M. (Friedrich M.), Fazeli, W. (Walid), Striano, P. (Pasquale), Dilena, R. (Robertino), Fontana, E. (Elena), Zara, F. (Federico), Kurlemann, G. (Gerhard), Klepper, J. (Joerg), Thoene, J.G. (Jess G.), Arndt, D.H. (Daniel H.), Deconinck, N. (Nicolas), Schmitt-Mechelke, T. (Thomas), Maier, O. (Oliver), Muhle, H. (Hiltrud), Wical, B. (Beverly), Finetti, C. (Claudio), Brückner, R. (Reinhard), Pietz, J. (Joachim), Golla, G. (Günther), Jillella, D. (Dinesh), Linnet, K.M. (Karen M.), Charles, P. (Perrine), Moog, U. (Ute), Õiglane-Shlik, E. (Eve), Mantovani, J.F. (John F.), Park, K. (Kristen), Deprez, M. (Marie), Lederer, D. (Damien), Mary, S. (Sandrine), Scalais, E. (Emmanuel), Selim, L. (Laila), Coster, R.N.A. (R. N A) van, Lagae, L. (Lieven), Nikanorova, M. (Marina), Hjalgrim, H. (Helle), Korenke, G.C. (Christoph), Trivisano, M. (Marina), Specchio, N. (Nicola), Ceulemans, B. (Berten), Dorn, T. (Thomas), Helbig, K.L. (Katherine L.), Hardies, K. (K.), Stamberger, H. (Hannah), Jonghe, P. (P.) de, Weckhuysen, S. (Sarah), Lemke, J.R. (Johannes R.), Krägeloh-Mann, I. (Ingeborg), Helbig, I. (Ingo), Kluger, G. (Gerhard), Lerche, H. (Holger), Møller, R.S. (Rikke), Wolff, M. (Markus), Johannesen, K.M. (Katrine M.), Hedrich, U.B.S. (Ulrike B. S.), Masnada, S. (Silvia), Rubboli, G. (Guido), Gardella, E. (Elena), Lesca, G. (Gaetan), Ville, D. (Dorothée), Milh, M. (Mathieu), Villard, L. (Laurent), Afenjar, A. (Alexandra), Chantot-Bastaraud, S. (Sandra), Mignot, A., Lardennois, C. (Caroline), Nava, C. (Caroline), Schwarz, N. (Niklas), Gérard, M. (Marion), Perrin, L. (Laurence), Doummar, D. (Diane), Auvin, S. (Stéphane), Miranda, M.J. (Maria J.), Hempel, M. (Maja), Brilstra, E. (Eva), Knoers, N.V.A.M. (Nine), Verbeek, N.E. (Nienke), Kempen, M.J.A. (M. J A) van, Braun, K.P. (Kees P.), Mancini, G.M.S. (Grazia), Biskup, S. (Saskia), Hörtnagel, K. (Konstanze), Döcker, M. (Miriam), Bast, T. (Thomas), Loddenkemper, T. (Tobias), Wong-Kisiel, L. (Lily), Baumeister, F.M. (Friedrich M.), Fazeli, W. (Walid), Striano, P. (Pasquale), Dilena, R. (Robertino), Fontana, E. (Elena), Zara, F. (Federico), Kurlemann, G. (Gerhard), Klepper, J. (Joerg), Thoene, J.G. (Jess G.), Arndt, D.H. (Daniel H.), Deconinck, N. (Nicolas), Schmitt-Mechelke, T. (Thomas), Maier, O. (Oliver), Muhle, H. (Hiltrud), Wical, B. (Beverly), Finetti, C. (Claudio), Brückner, R. (Reinhard), Pietz, J. (Joachim), Golla, G. (Günther), Jillella, D. (Dinesh), Linnet, K.M. (Karen M.), Charles, P. (Perrine), Moog, U. (Ute), Õiglane-Shlik, E. (Eve), Mantovani, J.F. (John F.), Park, K. (Kristen), Deprez, M. (Marie), Lederer, D. (Damien), Mary, S. (Sandrine), Scalais, E. (Emmanuel), Selim, L. (Laila), Coster, R.N.A. (R. N A) van, Lagae, L. (Lieven), Nikanorova, M. (Marina), Hjalgrim, H. (Helle), Korenke, G.C. (Christoph), Trivisano, M. (Marina), Specchio, N. (Nicola), Ceulemans, B. (Berten), Dorn, T. (Thomas), Helbig, K.L. (Katherine L.), Hardies, K. (K.), Stamberger, H. (Hannah), Jonghe, P. (P.) de, Weckhuysen, S. (Sarah), Lemke, J.R. (Johannes R.), Krägeloh-Mann, I. (Ingeborg), Helbig, I. (Ingo), Kluger, G. (Gerhard), Lerche, H. (Holger), and Møller, R.S. (Rikke)

Abstract

Mutations in SCN2A, a gene encoding the voltage-gated sodium channel Nav1.2, have been associated with a spectrum of epilepsies and neurodevelopmental disorders. Here, we report the phenotypes of 71 patients and review 130 previously reported patients. We found that (i) encephalopathies with infantile/childhood onset epilepsies (≥3 months of age) occur almost as often as those with an early infantile onset (<3 months), and are thus more frequent than previously reported; (ii) distinct phenotypes can be seen within the late onset group, including myoclonic-atonic epilepsy (two patients), Lennox-Gastaut not emerging from West syndrome (two patients), and focal epilepsies with an electrical status epilepticus during slow sleep-like EEG pattern (six patients); and (iii) West syndrome constitutes a common phenotype with a major recurring mutation (p.Arg853Gln: two new and four previously reported children). Other known phenotypes include Ohtahara syndrome, epilepsy of infancy with migrating focal seizures, and intellectual disability or autism without epilepsy. To assess the response to antiepileptic therapy, we retrospectively reviewed the treatme

Published
2017
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