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749 results on '"Pfundt R"'

1. Myoclonic-Atonic Epilepsy Caused by a Novel de Novo Heterozygous Missense Variant in the SLC6A1 Gene: Brief Discussion of the Literature and Detailed Case Description of a Severely Intellectually Disabled Adult Male Patient

Author: Verhoeven W, Zuijdam J, Scheick A, van Nieuwenhuijsen F, Zwemer AS, Pfundt R, and Egger J
Subjects: myoclonic-atonic epilepsy, slc6a1, missense variant, intellectual disability, epilepsy, autism., Medicine (General), R5-920
Abstract: Willem Verhoeven,1– 3 José Zuijdam,4 Anneke Scheick,4 Frederiek van Nieuwenhuijsen,5 Anne-Suus Zwemer,5 Rolph Pfundt,6,7 Jos Egger3,6,7 1Department of Psychiatry, Erasmus University Medical Center, Rotterdam, the Netherlands; 2Centre for Consultation and Expertise, Utrecht, the Netherlands; 3Vincent van Gogh Centre of Excellence for Neuropsychiatry, Venray, the Netherlands; 4Raphael Institute Breidablick, Centre for People with Intellectual Disabilities, Middenbeemster, the Netherlands; 5ASVZ, Centre for People with Intellectual Disabilities, Sliedrecht, the Netherlands; 6Department of Human Genetics, Radboud University Medical Centre, Nijmegen, the Netherlands; 7Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, the NetherlandsCorrespondence: Willem Verhoeven, Centre of Excellence for Neuropsychiatry, Stationsweg 46, Venray, 5803 AC, the Netherlands, Tel +31651156556, Fax +31478584765, Email wmaverhoeven@planet.nlIntroduction: Diagnostic exome sequencing has yielded over the past decades a great number of molecular diagnoses for genetic disorders in which both intellectual disability and epilepsy are present. One of these syndromes is myoclonic-atonic epilepsy (MAE) that is caused by pathogenic variants in the SLC6A1 gene located at 3p25.3. The most relevant clinical characteristics are intellectual disability, several forms of mostly treatment-resistant epilepsy starting at young age, serious disinhibitory behavioural problems, language impairment, higher pain tolerance, and symptoms from the autism spectrum, all in the absence of any consistent dysmorphism or malformation.Methods: After an overview of the literature, here, the developmental trajectory of a 55-year-old severely intellectually disabled male with therapy-resistant epilepsy and aggressive outburst is reported in detail, in whom no etiological diagnosis had been performed. Next to genetic, neurological, and neuropsychiatric examination, psychological assessment with validated instruments was performed.Results: Exome sequencing and targeted analysis of the patient and both his parents demonstrated a de novo missense variant in the SLC6A1 gene which was never before described in the literature nor in control databases. The phenotypical presentation of the patient with treatment-resistant epilepsy, especially absences and myoclonic seizures, as well as sleep disturbances and autism, corresponds with a diagnosis of MAE.Discussion: This case stresses that exome sequencing should be the first-tier diagnostic test for patients with unexplained neurodevelopmental disorders, regardless of their age, and that as yet the most suitable approach is the formation of an interdisciplinary team for treatment design and clinical management.Keywords: myoclonic-atonic epilepsy, SLC6A1, missense variant, intellectual disability, epilepsy, autism
Published: 2022

2. A Patient with Moderate Intellectual Disability and 49, XXXYY Karyotype

Author: Verhoeven WMA, Egger JIM, Mergler S, Meijer TAA, Pfundt R, and Willemsen MH
Subjects: 49, xxxyy pentasomy, klinefelter syndrome, testosterone, autism, treatment design, Medicine (General), R5-920
Abstract: Willem MA Verhoeven,1– 3 Jos IM Egger,3– 5 Sandra Mergler,6 Ton AA Meijer,7 Rolph Pfundt,4,8 Marjolein H Willemsen8 1Department of Psychiatry, Erasmus University Medical Center, Rotterdam, The Netherlands; 2Centre for Consultation and Expertise, Utrecht, The Netherlands; 3Vincent van Gogh Centre of Excellence for Neuropsychiatry, Venray, The Netherlands; 4Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, The Netherlands; 5Stevig, Specialized and Forensic Care for People with Intellectual Disabilities, Dichterbij, Oostrum, The Netherlands; 6ASVZ, Centre for People with Intellectual Disabilities, Sliedrecht, The Netherlands; 7Department of Internal Medicine, Albert Schweitzer Hospital, Dordrecht, The Netherlands; 8Department of Human Genetics, Radboud University Medical Centre, Nijmegen, The NetherlandsCorrespondence: Willem MA Verhoeven, Centre of Excellence for Neuropsychiatry, Stationsweg 46, Venray, 5803 AC, The Netherlands, Tel +31651156556, Fax +31478584765, Email wmaverhoeven@planet.nlAbstract: Klinefelter syndrome is a chromosomal disorder in which one extra X chromosome is present (47,XXY). Several other numeric variants of this syndrome are described that comprise one or more additional sex chromosomes such as 48,XXXY, 48,XXYY and 49,XXXXY. These rare conditions are often associated with increased risk for congenital malformations, additional medical problems, and a more complex psychological phenotype. Since 1963, apart from two infants, only four adult patients with a XXXYY pentasomy have been published as case report. The present paper critically reviews the existing literature and provides detailed assessments of a 25-year-old male with intellectual disability and autism. For the first time, this very rare pentasomy is now recorded using all information about developmental history as well as findings from genetic, somatic, endocrinological and neuropsychological examination. It is concluded that children born with abnormalities of the external genitalia should always be evaluated for genetic abnormalities in order to avoid unwanted delay of appropriately designed multidisciplinary medical and psychological treatment.Keywords: 49, XXXYY pentasomy, Klinefelter syndrome, testosterone, autism, treatment design
Published: 2022

3. A de novo CTNNB1 Novel Splice Variant in an Adult Female with Severe Intellectual Disability

Author: Verhoeven WMA, Egger JIM, Jongbloed RE, Meijer van Putten M, de Bruin-van Zandwijk M, Zwemer AS, Pfundt R, and Willemsen MH
Subjects: heterozygous splice site variant, ctnnb1, nedsdv, autism, intellectual disability, distal spastic tetraparesis, Medicine (General), R5-920
Abstract: Willem MA Verhoeven,1– 3 Jos IM Egger,3– 5 Rob E Jongbloed,6 Marloes Meijer van Putten,6 Marieke de Bruin-van Zandwijk,7 Anne-Suus Zwemer,7 Rolph Pfundt,4,8 Marjolein H Willemsen8 1Department of Psychiatry, Erasmus University Medical Center, Rotterdam, the Netherlands; 2Centre for Consultation and Expertise, Utrecht, the Netherlands; 3Vincent van Gogh Centre of Excellence for Neuropsychiatry, Venray, the Netherlands; 4Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, the Netherlands; 5Stevig, Specialized and Forensic Care for People with Intellectual Disabilities, Dichterbij, Oostrum, the Netherlands; 6Raphael Institute Scorlewald, Centre for People with Intellectual Disabilities, Schoorl, the Netherlands; 7ASVZ, Centre for People with Intellectual Disabilities, Sliedrecht, the Netherlands; 8Department of Human Genetics, Radboud University Medical Centre, Nijmegen, the NetherlandsCorrespondence: Willem MA VerhoevenVincent Van Gogh Centre of Excellence for Neuropsychiatry, Stationsweg 46, 5803 AC, Venray, the NetherlandsTel +31 651156556Fax +31 478584765Email wmaverhoeven@planet.nlAbstract: The catenin beta-1 (CTNNB1) gene, encoding a sub-unit of the cadherin/catenin protein complex that is involved in the Wnt signalling pathway important for proper interneuron development, is considered to be causative for the rare autosomal dominant mental retardation syndrome, formerly called MRD19 but later renamed neurodevelopmental disorder with spastic diplegia and visual defects (NEDSDV). Its main characteristics are moderate to severe intellectual disability (ID), disruptive autistic behaviours, microcephaly, absent or limited speech, facial dysmorphisms, peripheral hypertonia/spasticity, motor delay and visual defects. So far, 35 patients have been reported with a de novo loss-of-function variant in CTNNB1. In two other patients, a deletion comprising the full gene was found. Four out of the 37 patients were of adult age (range: 27– 51 years), while the majority was infant or adolescent (range: 0– 20 years). Here, a 32-year-old severely intellectually disabled female patient is described in whom exome sequencing disclosed a de novo heterozygous splice site variant in the CTNNB1 gene [Chr3(GRCh37): g.41267064G>T; NM_001904.3: 23. c.734+1G>T; r. spl?]. Somatic investigation disclosed significant microcephaly and minor facial dysmorphisms. Neurological examination demonstrated severe kyphoscoliosis, distal spastic tetraparesis, especially of the legs with increased tendon reflexes and bilateral Babinski sign, resulting in severely impaired walking capability with a broad-based gait. Apart from strabismus, no ophthalmological abnormalities were found. Here, the reported variant in the CTNNB1 gene was not published earlier nor is included in the international databases. This specific variant is considered to be causative for the severe ID, autism and the somato-neurological phenotype of the patient and corresponds with a diagnosis of NEDSDV.Keywords: heterozygous splice site variant, CTNNB1, NEDSDV, autism, intellectual disability, distal spastic tetraparesis
Published: 2020

4. Phenotypic characterization of an older adult male with late-onset epilepsy and a novel mutation in ASXL3 shows overlap with the associated Bainbridge-Ropers syndrome

Author: Verhoeven W, Egger J, Räkers E, van Erkelens A, Pfundt R, and Willemsen MH
Subjects: Bainbridge-Ropers syndrome, ASLX3, frameshift mutation, epilepsy, intellectual disability., Neurosciences. Biological psychiatry. Neuropsychiatry, RC321-571, Neurology. Diseases of the nervous system, RC346-429
Abstract: Willem Verhoeven,1,2 Jos Egger,1,3 Emmy Räkers,4 Arjen van Erkelens,5 Rolph Pfundt,5 Marjolein H Willemsen5 1Vincent van Gogh Institute for Psychiatry, Centre of Excellence for Neuropsychiatry, Venray, the Netherlands; 2Department of Psychiatry, Erasmus University Medical Centre, Rotterdam, the Netherlands; 3Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, the Netherlands; 4ASVZ, Centre for People with Intellectual Disabilities, Sliedrecht, the Netherlands; 5Department of Human Genetics, Radboud University Medical Centre, Nijmegen, the Netherlands Abstract: The additional sex combs like 3 gene is considered to be causative for the rare Bainbridge-Ropers syndrome (BRPS), which is characterized by severe intellectual disability, neonatal hypotonia, nearly absent development of speech and language as well as several facial dysmorphisms. Apart from disruptive autistiform behaviors, sleep disturbances and epileptic phenomena may be present. Here, a 47-year-old severely intellectually disabled male is described in whom exome sequencing disclosed a novel heterozygous frameshift mutation in the ASXL3 gene leading to a premature stopcodon in the last part of the last exon. Mutations in this very end 3' of the gene have not been reported before in BRPS. The phenotypical presentation of the patient including partially therapy-resistant epilepsy starting in later adulthood shows overlap with BRPS, and it was therefore concluded that the phenotype is likely explained by the identified mutation in ASXL3. Keywords: Bainbridge-Ropers syndrome, ASLX3, frameshift mutation, epilepsy, intellectual disability, array analysis, whole exome sequencing, autism spectrum disorder
Published: 2018

5. Copy number variants in a sample of patients with psychotic disorders: is standard screening relevant for actual clinical practice?

Author: Van de Kerkhof NW, Feenstra I, van der Heijden FM, De Leeuw N, Pfundt R, Stöber G, Egger JI, and Verhoeven WM
Subjects: Neurosciences. Biological psychiatry. Neuropsychiatry, RC321-571, Neurology. Diseases of the nervous system, RC346-429
Abstract: Noortje WA Van de Kerkhof,1 Ilse Feenstra,2 Jos IM Egger,1,3,4 Nicole de Leeuw,2 Rolph Pfundt,2 Gerald Stöber,5 Frank MMA van der Heijden,1 Willem MA Verhoeven1,61Vincent van Gogh Institute for Psychiatry, Centre of Excellence for Neuropsychiatry, Venray, The Netherlands; 2Radboud University Nijmegen Medical Centre, Department of Human Genetics, Nijmegen, The Netherlands; 3Donders Institute for Brain, Cognition and Behaviour, 4Behavioural Science Institute, Radboud University, Nijmegen, The Netherlands; 5University of Würzburg, Department of Psychiatry, Psychosomatics and Psychotherapy, Würzburg, Germany; 6Erasmus University Medical Centre, Department of Psychiatry, Rotterdam, The NetherlandsAbstract: With the introduction of new genetic techniques such as genome-wide array comparative genomic hybridization, studies on the putative genetic etiology of schizophrenia have focused on the detection of copy number variants (CNVs), ie, microdeletions and/or microduplications, that are estimated to be present in up to 3% of patients with schizophrenia. In this study, out of a sample of 100 patients with psychotic disorders, 80 were investigated by array for the presence of CNVs. The assessment of the severity of psychiatric symptoms was performed using standardized instruments and ICD-10 was applied for diagnostic classification. In three patients, a submicroscopic CNV was demonstrated, one with a loss in 1q21.1 and two with a gain in 1p13.3 and 7q11.2, respectively. The association between these or other CNVs and schizophrenia or schizophrenia-like psychoses and their clinical implications still remain equivocal. While the CNV affected genes may enhance the vulnerability for psychiatric disorders via effects on neuronal architecture, these insights have not resulted in major changes in clinical practice as yet. Therefore, genome-wide array analysis should presently be restricted to those patients in whom psychotic symptoms are paired with other signs, particularly dysmorphisms and intellectual impairment.Keywords: schizophrenia, psychotic disorders, microarray, copy number variants, 1q21, 7q11.2, 1p13.3
Published: 2012

6. ARID1B-related disorder in 87 adults: Natural history and self-sustainability

Author: van der Sluijs, P.J., Gösgens, M., Dingemans, A.J.M., Striano, P., Riva, A., Mignot, C., Faudet, A., Vasileiou, G., Walther, M., Schrier Vergano, S.A., Alders, M., Alkuraya, F.S., Alorainy, I., Alsaif, H.S., Anderlid, B., Bache, I., van Beek, I., Blanluet, M., van Bon, B.W., Brunet, T., Brunner, H., Carriero, M.L., Charles, P., Chatron, N., Coccia, E., Dubourg, C., Earl, R.K., Eichler, E.E., Faivre, L., Foulds, N., Graziano, C., Guerrot, A.M., Hashem, M.O., Heide, S., Heron, D., Hickey, S.E., Hopman, S.M.J., Kattentidt-Mouravieva, A., Kerkhof, J., Klein Wassink-Ruiter, J.S., Kurtz-Nelson, E.C., Kušíková, K., Kvarnung, M., Lecoquierre, F., Leszinski, G.S., Loberti, L., Magoulas, P.L., Mari, F., Maystadt, I., Merla, G., Milunsky, J.M., Moortgat, S., Nicolas, G., Leary, M.O.’, Odent, S., Ozmore, J.R., Parbhoo, K., Pfundt, R., Piccione, M., Pinto, A.M., Popp, B., Putoux, A., Rehm, H.L., Reis, A., Renieri, A., Rosenfeld, J.A., Rossi, M., Salzano, E., Saugier-Veber, P., Seri, M., Severi, G., Sonmez, F.M., Strobl-Wildemann, G., Stuurman, K.E., Uctepe, E., Van Esch, H., Vitetta, G., de Vries, B.B.A., Wahl, D., Wang, T., Zacher, P., Heitink, K.R., Ropers, F.G., Steenbeek, D., Rybak, T., and Santen, G.W.E.
Published: 2024
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7. De novo variants in MED12 cause X-linked syndromic neurodevelopmental disorders in 18 females

Author: Polla, D. L., Bhoj, E. J., Verheij, J. B. G. M., Wassink-Ruiter, J. S. Klein, Reis, A., Deshpande, C., Gregor, A., Hill-Karfe, K., Silfhout, A. T. Vulto-van, Pfundt, R., Bongers, E. M. H. F., Hakonarson, H., Berland, S., Gradek, G., Banka, S., Chandler, K., Gompertz, L., Huffels, S. C., Stumpel, C. T. R. M., Wennekes, R., Stegmann, A. P. A., Reardon, W., Leenders, E. K. S. M., de Vries, B. B. A., Li, D., Zackai, E., Ragge, N., Lynch, S. A., Cuddapah, S., van Bokhoven, H., Zweier, C., and de Brouwer, A. P. M.
Published: 2021
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8. A Solve-RD ClinVar-based reanalysis of 1522 index cases from ERN-ITHACA reveals common pitfalls and misinterpretations in exome sequencing

Author: Denomme-Pichon A. -S., Bruel A. -L., Duffourd Y., Safraou H., Thauvin-Robinet C., Tran Mau-Them F., Philippe C., Vitobello A., Jean-Marcais N., Moutton S., Thevenon J., Faivre L., Matalonga L., de Boer E., Gilissen C., Hoischen A., Kleefstra T., Pfundt R., de Vries B. B. A., Willemsen M. H., Vissers L. E. L. M., Jackson A., Banka S., Clayton-Smith J., Benetti E., Fallerini C., Renieri A., Ciolfi A., Dallapiccola B., Pizzi S., Radio F. C., Tartaglia M., Ellwanger K., Graessner H., Haack T. B., Zurek B., Havlovicova M., Macek M., Ryba L., Schwarz M., Votypka P., Lopez-Martin E., Posada M., Mencarelli M. A., Rooryck C., Trimouille A., Verloes A., Abbott K. M., Kerstjens M., Martin E. L., Maystadt I., Morleo M., Nigro V., Pinelli M., Riess O., Agathe J. -M. D. S., Santen G. W. E., Thauvin C., Torella A., Vissers L., Zguro K., Boer E. D., Cohen E., Danis D., Gao F., Horvath R., Johari M., Johanson L., Li S., Morsy H., Nelson I., Paramonov I., te Paske I. B. A. W., Robinson P., Savarese M., Steyaert W., Topf A., van der Velde J. K., Vandrovcova J., Ossowski S., Demidov G., Sturm M., Schulze-Hentrich J. M., Schule R., Xu J., Kessler C., Wayand M., Synofzik M., Wilke C., Traschutz A., Schols L., Hengel H., Lerche H., Kegele J., Heutink P., Brunner H., Scheffer H., Hoogerbrugge N., 't Hoen P. A. C., Sablauskas K., de Voer R. M., Kamsteeg E. -J., van de Warrenburg B., van Os N., Paske I. T., Janssen E., Steehouwer M., Yaldiz B., Brookes A. J., Veal C., Gibson S., Maddi V., Mehtarizadeh M., Riaz U., Warren G., Dizjikan F. Y., Shorter T., Straub V., Bettolo C. M., Manera J. D., Hambleton S., Engelhardt K., Alexander E., Peyron C., Pelissier A., Beltran S., Gut I. G., Laurie S., Piscia D., Papakonstantinou A., Bullich G., Corvo A., Fernandez-Callejo M., Hernandez C., Pico D., Lochmuller H., Gumus G., Bros-Facer V., Rath A., Hanauer M., Lagorce D., Hongnat O., Chahdil M., Lebreton E., Stevanin G., Durr A., Davoine C. -S., Guillot-Noel L., Heinzmann A., Coarelli G., Bonne G., Evangelista T., Allamand V., Ben Yaou R., Metay C., Eymard B., Atalaia A., Stojkovic T., Turnovec M., Thomasova D., Kremlikova R. P., Frankova V., Liskova P., Dolezalova P., Parkinson H., Keane T., Freeberg M., Thomas C., Spalding D., Robert G., Costa A., Patch C., Hanna M., Houlden H., Reilly M., Efthymiou S., Cali E., Magrinelli F., Sisodiya S. M., Rohrer J., Muntoni F., Zaharieva I., Sarkozy A., Timmerman V., Baets J., de Vries G., De Winter J., Beijer D., de Jonghe P., Van de Vondel L., De Ridder W., Weckhuysen S., Mutarelli M., Varavallo A., Banfi S., Musacchia F., Piluso G., Ferlini A., Selvatici R., Gualandi F., Bigoni S., Rossi R., Neri M., Aretz S., Spier I., Sommer A. K., Peters S., Oliveira C., Pelaez J. G., Matos A. R., Jose C. S., Ferreira M., Gullo I., Fernandes S., Garrido L., Ferreira P., Carneiro F., Swertz M. A., Johansson L., van der Vries G., Neerincx P. B., Ruvolo D., Kerstjens Frederikse W. S., Zonneveld-Huijssoon E., Roelofs-Prins D., van Gijn M., Kohler S., Metcalfe A., Drunat S., Heron D., Mignot C., Keren B., Lacombe D., Capella G., Valle L., Holinski-Feder E., Laner A., Steinke-Lange V., Cilio M. -R., Carpancea E., Depondt C., Lederer D., Sznajer Y., Duerinckx S., Mary S., Macaya A., Cazurro-Gutierrez A., Perez-Duenas B., Munell F., Jarava C. F., Maso L. B., Marce-Grau A., Colobran R., Hackman P., Udd B., Hemelsoet D., Dermaut B., Schuermans N., Poppe B., Verdin H., Osorio A. N., Depienne C., Roos A., Cordts I., Deschauer M., Striano P., Zara F., Riva A., Iacomino M., Uva P., Scala M., Scudieri P., Basak A. N., Claeys K., Boztug K., Haimel M., W. E G., Ruivenkamp C. A. L., Natera de Benito D., Thompson R., Polavarapu K., Grimbacher B., Zaganas I., Kokosali E., Lambros M., Evangeliou A., Spilioti M., Kapaki E., Bourbouli M., Balicza P., Molnar M. J., De la Paz M. P., Sanchez E. B., Delgado B. M., Alonso Garcia de la Rosa F. J., Schrock E., Rump A., Mei D., Vetro A., Balestrini S., Guerrini R., Chinnery P. F., Ratnaike T., Schon K., Maver A., Peterlin B., Munchau A., Lohmann K., Herzog R., Pauly M., May P., Beeson D., Cossins J., Furini S., Afenjar A., Goldenberg A., Masurel A., Phan A., Dieux-Coeslier A., Fargeot A., Guerrot A. -M., Toutain A., Molin A., Sorlin A., Putoux A., Jouret B., Laudier B., Demeer B., Doray B., Bonniaud B., Isidor B., Gilbert-Dussardier B., Leheup B., Reversade B., Paul C., Vincent-Delorme C., Neiva C., Poirsier C., Quelin C., Chiaverini C., Coubes C., Francannet C., Colson C., Desplantes C., Wells C., Goizet C., Sanlaville D., Amram D., Lehalle D., Genevieve D., Gaillard D., Zivi E., Sarrazin E., Steichen E., Schaefer E., Lacaze E., Jacquemin E., Bongers E., Kilic E., Colin E., Giuliano F., Prieur F., Laffargue F., Morice-Picard F., Petit F., Cartault F., Feillet F., Baujat G., Morin G., Diene G., Journel H., Perthus I., Lespinasse J., Alessandri J. -L., Amiel J., Martinovic J., Delanne J., Albuisson J., Lambert L., Perrin L., Ousager L. B., Van Maldergem L., Pinson L., Ruaud L., Samimi M., Bournez M., Bonnet-Dupeyron M. N., Vincent M., Jacquemont M. -L., Cordier-Alex M. -P., Gerard-Blanluet M., Willems M., Spodenkiewicz M., Doco-Fenzy M., Rossi M., Renaud M., Fradin M., Mathieu M., Holder-Espinasse M. H., Houcinat N., Hanna N., Leperrier N., Chassaing N., Philip N., Boute O., Van Kien P. K., Parent P., Bitoun P., Sarda P., Vabres P., Jouk P. -S., Touraine R., El Chehadeh S., Whalen S., Marlin S., Passemard S., Grotto S., Bellanger S. A., Blesson S., Nambot S., Naudion S., Lyonnet S., Odent S., Attie-Bitach T., Busa T., Drouin-Garraud V., Layet V., Bizaoui V., Cusin V., Capri Y., Alembik Y., Unión Europea. Comisión Europea. H2020, Unión Europea. Comisión Europea. 7 Programa Marco, Instituto de Salud Carlos III, Instituto Nacional de Bioinformatica (España), Ministry of Health (República Checa), Ministry of Education, Youth and Sports (República Checa), Denomme-Pichon, A. -S., Bruel, A. -L., Duffourd, Y., Safraou, H., Thauvin-Robinet, C., Tran Mau-Them, F., Philippe, C., Vitobello, A., Jean-Marcais, N., Moutton, S., Thevenon, J., Faivre, L., Matalonga, L., de Boer, E., Gilissen, C., Hoischen, A., Kleefstra, T., Pfundt, R., de Vries, B. B. A., Willemsen, M. H., Vissers, L. E. L. M., Jackson, A., Banka, S., Clayton-Smith, J., Benetti, E., Fallerini, C., Renieri, A., Ciolfi, A., Dallapiccola, B., Pizzi, S., Radio, F. C., Tartaglia, M., Ellwanger, K., Graessner, H., Haack, T. B., Zurek, B., Havlovicova, M., Macek, M., Ryba, L., Schwarz, M., Votypka, P., Lopez-Martin, E., Posada, M., Mencarelli, M. A., Rooryck, C., Trimouille, A., Verloes, A., Abbott, K. M., Kerstjens, M., Martin, E. L., Maystadt, I., Morleo, M., Nigro, V., Pinelli, M., Riess, O., Agathe, J. -M. D. S., Santen, G. W. E., Thauvin, C., Torella, A., Vissers, L., Zguro, K., Boer, E. D., Cohen, E., Danis, D., Gao, F., Horvath, R., Johari, M., Johanson, L., Li, S., Morsy, H., Nelson, I., Paramonov, I., te Paske, I. B. A. W., Robinson, P., Savarese, M., Steyaert, W., Topf, A., van der Velde, J. K., Vandrovcova, J., Ossowski, S., Demidov, G., Sturm, M., Schulze-Hentrich, J. M., Schule, R., Xu, J., Kessler, C., Wayand, M., Synofzik, M., Wilke, C., Traschutz, A., Schols, L., Hengel, H., Lerche, H., Kegele, J., Heutink, P., Brunner, H., Scheffer, H., Hoogerbrugge, N., 't Hoen, P. A. C., Sablauskas, K., de Voer, R. M., Kamsteeg, E. -J., van de Warrenburg, B., van Os, N., Paske, I. T., Janssen, E., Steehouwer, M., Yaldiz, B., Brookes, A. J., Veal, C., Gibson, S., Maddi, V., Mehtarizadeh, M., Riaz, U., Warren, G., Dizjikan, F. Y., Shorter, T., Straub, V., Bettolo, C. M., Manera, J. D., Hambleton, S., Engelhardt, K., Alexander, E., Peyron, C., Pelissier, A., Beltran, S., Gut, I. G., Laurie, S., Piscia, D., Papakonstantinou, A., Bullich, G., Corvo, A., Fernandez-Callejo, M., Hernandez, C., Pico, D., Lochmuller, H., Gumus, G., Bros-Facer, V., Rath, A., Hanauer, M., Lagorce, D., Hongnat, O., Chahdil, M., Lebreton, E., Stevanin, G., Durr, A., Davoine, C. -S., Guillot-Noel, L., Heinzmann, A., Coarelli, G., Bonne, G., Evangelista, T., Allamand, V., Ben Yaou, R., Metay, C., Eymard, B., Atalaia, A., Stojkovic, T., Turnovec, M., Thomasova, D., Kremlikova, R. P., Frankova, V., Liskova, P., Dolezalova, P., Parkinson, H., Keane, T., Freeberg, M., Thomas, C., Spalding, D., Robert, G., Costa, A., Patch, C., Hanna, M., Houlden, H., Reilly, M., Efthymiou, S., Cali, E., Magrinelli, F., Sisodiya, S. M., Rohrer, J., Muntoni, F., Zaharieva, I., Sarkozy, A., Timmerman, V., Baets, J., de Vries, G., De Winter, J., Beijer, D., de Jonghe, P., Van de Vondel, L., De Ridder, W., Weckhuysen, S., Mutarelli, M., Varavallo, A., Banfi, S., Musacchia, F., Piluso, G., Ferlini, A., Selvatici, R., Gualandi, F., Bigoni, S., Rossi, R., Neri, M., Aretz, S., Spier, I., Sommer, A. K., Peters, S., Oliveira, C., Pelaez, J. G., Matos, A. R., Jose, C. S., Ferreira, M., Gullo, I., Fernandes, S., Garrido, L., Ferreira, P., Carneiro, F., Swertz, M. A., Johansson, L., van der Vries, G., Neerincx, P. B., Ruvolo, D., Kerstjens Frederikse, W. S., Zonneveld-Huijssoon, E., Roelofs-Prins, D., van Gijn, M., Kohler, S., Metcalfe, A., Drunat, S., Heron, D., Mignot, C., Keren, B., Lacombe, D., Capella, G., Valle, L., Holinski-Feder, E., Laner, A., Steinke-Lange, V., Cilio, M. -R., Carpancea, E., Depondt, C., Lederer, D., Sznajer, Y., Duerinckx, S., Mary, S., Macaya, A., Cazurro-Gutierrez, A., Perez-Duenas, B., Munell, F., Jarava, C. F., Maso, L. B., Marce-Grau, A., Colobran, R., Hackman, P., Udd, B., Hemelsoet, D., Dermaut, B., Schuermans, N., Poppe, B., Verdin, H., Osorio, A. N., Depienne, C., Roos, A., Cordts, I., Deschauer, M., Striano, P., Zara, F., Riva, A., Iacomino, M., Uva, P., Scala, M., Scudieri, P., Basak, A. N., Claeys, K., Boztug, K., Haimel, M., W. E, G., Ruivenkamp, C. A. L., Natera de Benito, D., Thompson, R., Polavarapu, K., Grimbacher, B., Zaganas, I., Kokosali, E., Lambros, M., Evangeliou, A., Spilioti, M., Kapaki, E., Bourbouli, M., Balicza, P., Molnar, M. J., De la Paz, M. P., Sanchez, E. B., Delgado, B. M., Alonso Garcia de la Rosa, F. J., Schrock, E., Rump, A., Mei, D., Vetro, A., Balestrini, S., Guerrini, R., Chinnery, P. F., Ratnaike, T., Schon, K., Maver, A., Peterlin, B., Munchau, A., Lohmann, K., Herzog, R., Pauly, M., May, P., Beeson, D., Cossins, J., Furini, S., Afenjar, A., Goldenberg, A., Masurel, A., Phan, A., Dieux-Coeslier, A., Fargeot, A., Guerrot, A. -M., Toutain, A., Molin, A., Sorlin, A., Putoux, A., Jouret, B., Laudier, B., Demeer, B., Doray, B., Bonniaud, B., Isidor, B., Gilbert-Dussardier, B., Leheup, B., Reversade, B., Paul, C., Vincent-Delorme, C., Neiva, C., Poirsier, C., Quelin, C., Chiaverini, C., Coubes, C., Francannet, C., Colson, C., Desplantes, C., Wells, C., Goizet, C., Sanlaville, D., Amram, D., Lehalle, D., Genevieve, D., Gaillard, D., Zivi, E., Sarrazin, E., Steichen, E., Schaefer, E., Lacaze, E., Jacquemin, E., Bongers, E., Kilic, E., Colin, E., Giuliano, F., Prieur, F., Laffargue, F., Morice-Picard, F., Petit, F., Cartault, F., Feillet, F., Baujat, G., Morin, G., Diene, G., Journel, H., Perthus, I., Lespinasse, J., Alessandri, J. -L., Amiel, J., Martinovic, J., Delanne, J., Albuisson, J., Lambert, L., Perrin, L., Ousager, L. B., Van Maldergem, L., Pinson, L., Ruaud, L., Samimi, M., Bournez, M., Bonnet-Dupeyron, M. N., Vincent, M., Jacquemont, M. -L., Cordier-Alex, M. -P., Gerard-Blanluet, M., Willems, M., Spodenkiewicz, M., Doco-Fenzy, M., Rossi, M., Renaud, M., Fradin, M., Mathieu, M., Holder-Espinasse, M. H., Houcinat, N., Hanna, N., Leperrier, N., Chassaing, N., Philip, N., Boute, O., Van Kien, P. K., Parent, P., Bitoun, P., Sarda, P., Vabres, P., Jouk, P. -S., Touraine, R., El Chehadeh, S., Whalen, S., Marlin, S., Passemard, S., Grotto, S., Bellanger, S. A., Blesson, S., Nambot, S., Naudion, S., Lyonnet, S., Odent, S., Attie-Bitach, T., Busa, T., Drouin-Garraud, V., Layet, V., Bizaoui, V., Cusin, V., Capri, Y., Alembik, Y., and Luxembourg Centre for Systems Biomedicine (LCSB): Bioinformatics Core (R. Schneider Group) [research center]
Subjects: Exome reanalysis, Neurodevelopmental disorders Donders Center for Medical Neuroscience [Radboudumc 7], Multidisciplinaire, généralités & autres [D99] [Sciences de la santé humaine], Developmental disorder, lnfectious Diseases and Global Health Radboud Institute for Molecular Life Sciences [Radboudumc 4], Biology and Life Sciences, Metabolic Disorders Radboud Institute for Molecular Life Sciences [Radboudumc 6], ClinVar, Rare diseases, All institutes and research themes of the Radboud University Medical Center, Medicine and Health Sciences, Genetics & genetic processes [F10] [Life sciences], Génétique & processus génétiques [F10] [Sciences du vivant], Multidisciplinary, general & others [D99] [Human health sciences], Exome reanalysi, Genetics (clinical)
Abstract: Purpose: Within the Solve-RD project (https://solve-rd.eu/), the European Reference Network for Intellectual disability, TeleHealth, Autism and Congenital Anomalies aimed to investigate whether a reanalysis of exomes from unsolved cases based on ClinVar annotations could establish additional diagnoses. We present the results of the "ClinVar low-hanging fruit" reanalysis, reasons for the failure of previous analyses, and lessons learned. Methods: Data from the first 3576 exomes (1522 probands and 2054 relatives) collected from European Reference Network for Intellectual disability, TeleHealth, Autism and Congenital Anomalies was reanalyzed by the Solve-RD consortium by evaluating for the presence of single-nucleotide variant, and small insertions and deletions already reported as (likely) pathogenic in ClinVar. Variants were filtered according to frequency, genotype, and mode of inheritance and reinterpreted. Results: We identified causal variants in 59 cases (3.9%), 50 of them also raised by other approaches and 9 leading to new diagnoses, highlighting interpretation challenges: variants in genes not known to be involved in human disease at the time of the first analysis, misleading genotypes, or variants undetected by local pipelines (variants in off-target regions, low quality filters, low allelic balance, or high frequency). Conclusion: The "ClinVar low-hanging fruit" analysis represents an effective, fast, and easy approach to recover causal variants from exome sequencing data, herewith contributing to the reduction of the diagnostic deadlock. The Solve-RD project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement number 779257. Data were analyzed using the RD-Connect Genome-Phenome Analysis Platform, which received funding from the EU projects RD-Connect, Solve-RD, and European Joint Programme on Rare Diseases (grant numbers FP7 305444, H2020 779257, H2020 825575), Instituto de Salud Carlos III (grant numbers PT13/0001/0044, PT17/0009/0019; Instituto Nacional de Bioinformática), and ELIXIR Implementation Studies. The collaborations in this study were facilitated by the European Reference Network for Intellectual disability, TeleHealth, Autism and Congenital Anomalies, one of the 24 European Reference Networks approved by the European Reference Network Board of Member States, cofunded by the European Commission. This project was supported by the Czech Ministry of Health (number 00064203) and by the Czech Ministry of Education, Youth and Sports (number - LM2018132) to M.M. Sí
Published: 2023

9. Rapid exome sequencing as a first-tier test in neonates with suspected genetic disorder: results of a prospective multicenter clinical utility study in the Netherlands

Author: Olde Keizer, R.A.C.M., Marouane, A., Kerstjens-Frederikse, W.S., Deden, A.C., Lichtenbelt, K.D., Jonckers, T., Vervoorn, M., Vreeburg, M., Henneman, L., de Vries, L.S., Sinke, R.J., Pfundt, R., Stevens, S.J.C., Andriessen, P., van Lingen, R.A., Nelen, M., Scheffer, H., Stemkens, D., Oosterwijk, C., van Amstel, H.K.P., de Boode, W.P., van Zelst-Stams, W.A.G., Frederix, G.W.J., Vissers, L.E.L.M., RS: GROW - R4 - Reproductive and Perinatal Medicine, Genetica & Celbiologie, MUMC+: DA KG Polikliniek (9), and MUMC+: DA KG Lab Specialisten (9)
Subjects: Diagnostic workflow, All institutes and research themes of the Radboud University Medical Center, Neurodevelopmental disorders Donders Center for Medical Neuroscience [Radboudumc 7], Rapid exome sequencing, Other Research Radboud Institute for Health Sciences [Radboudumc 0], Vascular damage Radboud Institute for Health Sciences [Radboudumc 16], Metabolic Disorders Radboud Institute for Health Sciences [Radboudumc 6], Neonates, Clinical utility, Economic evaluation, COSTS
Abstract: Contains fulltext : 293809.pdf (Publisher’s version ) (Open Access) The introduction of rapid exome sequencing (rES) for critically ill neonates admitted to the neonatal intensive care unit has made it possible to impact clinical decision-making. Unbiased prospective studies to quantify the impact of rES over routine genetic testing are, however, scarce. We performed a clinical utility study to compare rES to conventional genetic diagnostic workup for critically ill neonates with suspected genetic disorders. In a multicenter prospective parallel cohort study involving five Dutch NICUs, we performed rES in parallel to routine genetic testing for 60 neonates with a suspected genetic disorder and monitored diagnostic yield and the time to diagnosis. To assess the economic impact of rES, healthcare resource use was collected for all neonates. rES detected more conclusive genetic diagnoses than routine genetic testing (20% vs. 10%, respectively), in a significantly shorter time to diagnosis (15 days (95% CI 10-20) vs. 59 days (95% CI 23-98, p
Published: 2023

10. Identification of new TRIP12 variants and detailed clinical evaluation of individuals with non-syndromic intellectual disability with or without autism

Author: Bramswig, Nuria C., Lüdecke, H.-J., Pettersson, M., Albrecht, B., Bernier, R. A., Cremer, K., Eichler, E. E., Falkenstein, D., Gerdts, J., Jansen, S., Kuechler, A., Kvarnung, M., Lindstrand, A., Nilsson, D., Nordgren, A., Pfundt, R., Spruijt, L., Surowy, H. M., de Vries, B. B. A., Wieland, T., Engels, H., Strom, T. M., Kleefstra, T., and Wieczorek, D.
Published: 2017
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11. Heterozygous ANKRD17 loss-of-function variants cause a syndrome with intellectual disability, speech delay, and dysmorphism

Author: Chopra, M., McEntagart, M., Clayton-Smith, J., Platzer, K., Shukla, A., Girisha, K.M., Kaur, A., Kaur, P., Pfundt, R., Veenstra-Knol, H., Mancini, G.M.S., Cappuccio, G., Brunetti-Pierri, N., Kortum, F., Hempel, M., Denecke, J., Lehman, A., Kleefstra, T., Stuurman, K.E., Wilke, M., Thompson, M.L., Bebin, E.M., Bijlsma, E.K., Hoffer, M.J.V., Peeters-Scholte, C., Slavotinek, A., Weiss, W.A., Yip, T., Hodoglugil, U., Whittle, A., Monda, J., Neira, J., Yang, S., Kirby, A., Pinz, H., Lechner, R., Sleutels, F., Helbig, I., McKeown, S., Helbig, K., Willaert, R., Juusola, J., Semotok, J., Hadonou, M., Short, J., Yachelevich, N., Lala, S., Fernandez-Jaen, A., Pelayo, J.P., Klockner, C., Kamphausen, S.B., Abou Jamra, R., Arelin, M., Innes, A.M., Niskakoski, A., Amin, S., Williams, M., Evans, J., Smithson, S., Smedley, D., Burca, A., Kini, U., Delatycki, M.B., Gallacher, L., Yeung, A., Pais, L., Field, M., Martin, E., Charles, P., Courtin, T., Keren, B., Iascone, M., Cereda, A., Poke, G., Abadie, V., Chalouhi, C., Parthasarathy, P., Halliday, B.J., Robertson, S.P., Lyonnet, S., Amiel, J., Gordon, C.T., CAUSES Study, Genomics England Res Consortium, Clinical Genetics, Chopra, Maya, Mcentagart, Meriel, Clayton-Smith, Jill, Platzer, Konrad, Shukla, Anju, Girisha, Katta M, Kaur, Anupriya, Kaur, Parneet, Pfundt, Rolph, Veenstra-Knol, Hermine, Mancini, Grazia M S, Cappuccio, Gerarda, Brunetti-Pierri, Nicola, Kortüm, Fanny, Hempel, Maja, Denecke, Jona, Lehman, Anna, Kleefstra, Tjitske, Stuurman, Kyra E, Wilke, Martina, Thompson, Michelle L, Bebin, E Martina, Bijlsma, Emilia K, Hoffer, Mariette J V, Peeters-Scholte, Cacha, Slavotinek, Anne, Weiss, William A, Yip, Tiffany, Hodoglugil, Ugur, Whittle, Amy, Dimonda, Janette, Neira, Juanita, Yang, Sandra, Kirby, Amelia, Pinz, Hailey, Lechner, Rosan, Sleutels, Frank, Helbig, Ingo, Mckeown, Sarah, Helbig, Katherine, Willaert, Rebecca, Juusola, Jane, Semotok, Jennifer, Hadonou, Medard, Short, John, Yachelevich, Naomi, Lala, Sajel, Fernández-Jaen, Alberto, Pelayo, Janvier Porta, Klöckner, Chiara, Kamphausen, Susanne B, Abou Jamra, Rami, Arelin, Maria, Innes, A Micheil, Niskakoski, Anni, Amin, Sam, Williams, Maggie, Evans, Julie, Smithson, Sarah, Smedley, Damian, de Burca, Anna, Kini, Usha, Delatycki, Martin B, Gallacher, Lyndon, Yeung, Alison, Pais, Lynn, Field, Michael, Martin, Ellenore, Charles, Perrine, Courtin, Thoma, Keren, Bori, Iascone, Maria, Cereda, Anna, Poke, Gemma, Abadie, Véronique, Chalouhi, Christel, Parthasarathy, Padmini, Halliday, Benjamin J, Robertson, Stephen P, Lyonnet, Stanisla, Amiel, Jeanne, and Gordon, Christopher T
Subjects: Male, speech delay, Haploinsufficiency, Craniofacial Abnormalities, 0302 clinical medicine, Neurodevelopmental disorder, Loss of Function Mutation, Intellectual disability, Missense mutation, Ankyrin, Child, Genetics (clinical), Genetics, chemistry.chemical_classification, 0303 health sciences, RNA-Binding Proteins, Syndrome, Pedigree, ANKYRIN REPEAT, Phenotype, Child, Preschool, Speech delay, Female, medicine.symptom, Signal Transduction, Adult, Heterozygote, Adolescent, MASK, ANKRD17, dysmorphism, Biology, 03 medical and health sciences, Young Adult, All institutes and research themes of the Radboud University Medical Center, SDG 3 - Good Health and Well-being, Intellectual Disability, Report, medicine, Humans, Language Development Disorders, Yorkie, Loss function, 030304 developmental biology, HIPPO PATHWAY, Neurodevelopmental disorders Donders Center for Medical Neuroscience [Radboudumc 7], MUTATIONS, Infant, medicine.disease, GENE, neurodevelopmental syndrome, chemistry, Ankyrin repeat, 030217 neurology & neurosurgery
Abstract: ANKRD17 is an ankyrin repeat-containing protein thought to play a role in cell cycle progression, whose ortholog in Drosophila functions in the Hippo pathway as a co-factor of Yorkie. Here, we delineate a neurodevelopmental disorder caused by de novo heterozygous ANKRD17 variants. The mutational spectrum of this cohort of 34 individuals from 32 families is highly suggestive of haploinsufficiency as the underlying mechanism of disease, with 21 truncating or essential splice site variants, 9 missense variants, 1 in-frame insertion-deletion, and 1 microdeletion (1.16 Mb). Consequently, our data indicate that loss of ANKRD17 is likely the main cause of phenotypes previously associated with large multi-gene chromosomal aberrations of the 4q13.3 region. Protein modeling suggests that most of the missense variants disrupt the stability of the ankyrin repeats through alteration of core structural residues. The major phenotypic characteristic of our cohort is a variable degree of developmental delay/intellectual disability, particularly affecting speech, while additional features include growth failure, feeding difficulties, non-specific MRI abnormalities, epilepsy and/or abnormal EEG, predisposition to recurrent infections (mostly bacterial), ophthalmological abnormalities, gait/balance disturbance, and joint hypermobility. Moreover, many individuals shared similar dysmorphic facial features. Analysis of single-cell RNA-seq data from the developing human telencephalon indicated ANKRD17 expression at multiple stages of neurogenesis, adding further evidence to the assertion that damaging ANKRD17 variants cause a neurodevelopmental disorder.
Published: 2021

12. Expanding the genotype and phenotype spectrum of SYT1-associated neurodevelopmental disorder

Author: Melland, H, Bumbak, F, Kolesnik-Taylor, A, Ng-Cordell, E, John, A, Constantinou, P, Joss, S, Larsen, M, Fagerberg, C, Laulund, LW, Thies, J, Emslie, F, Willemsen, M, Kleefstra, T, Pfundt, R, Barrick, R, Chang, R, Loong, L, Alfadhel, M, van der Smagt, J, Nizon, M, Kurian, MA, Scott, DJ, Ziarek, JJ, Gordon, SL, Baker, K, Melland, H, Bumbak, F, Kolesnik-Taylor, A, Ng-Cordell, E, John, A, Constantinou, P, Joss, S, Larsen, M, Fagerberg, C, Laulund, LW, Thies, J, Emslie, F, Willemsen, M, Kleefstra, T, Pfundt, R, Barrick, R, Chang, R, Loong, L, Alfadhel, M, van der Smagt, J, Nizon, M, Kurian, MA, Scott, DJ, Ziarek, JJ, Gordon, SL, and Baker, K
Abstract: PURPOSE: Synaptotagmin-1 (SYT1) is a critical mediator of neurotransmitter release in the central nervous system. Previously reported missense SYT1 variants in the C2B domain are associated with severe intellectual disability, movement disorders, behavioral disturbances, and electroencephalogram abnormalities. In this study, we expand the genotypes and phenotypes and identify discriminating features of this disorder. METHODS: We describe 22 individuals with 15 de novo missense SYT1 variants. The evidence for pathogenicity is discussed, including the American College of Medical Genetics and Genomics/Association for Molecular Pathology criteria, known structure-function relationships, and molecular dynamics simulations. Quantitative behavioral data for 14 cases were compared with other monogenic neurodevelopmental disorders. RESULTS: Four variants were located in the C2A domain with the remainder in the C2B domain. We classified 6 variants as pathogenic, 4 as likely pathogenic, and 5 as variants of uncertain significance. Prevalent clinical phenotypes included delayed developmental milestones, abnormal eye physiology, movement disorders, and sleep disturbances. Discriminating behavioral characteristics were severity of motor and communication impairment, presence of motor stereotypies, and mood instability. CONCLUSION: Neurodevelopmental disorder-associated SYT1 variants extend beyond previously reported regions, and the phenotypic spectrum encompasses a broader range of severities than initially reported. This study guides the diagnosis and molecular understanding of this rare neurodevelopmental disorder and highlights a key role for SYT1 function in emotional regulation, motor control, and emergent cognitive function.
Published: 2022

13. ‘Splitting versus lumping’: Temple–Baraitser and Zimmermann–Laband Syndromes

Author: Bramswig, Nuria C., Ockeloen, C. W., Czeschik, J. C., van Essen, A. J., Pfundt, R., Smeitink, J., Poll-The, B. T., Engels, H., Strom, T. M., Wieczorek, D., Kleefstra, T., and Lüdecke, H.-J.
Published: 2015
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14. Congenital myopathy caused by a novel missense mutation in the CFL2 gene

Author: Ockeloen, C.W., Gilhuis, H.J., Pfundt, R., Kamsteeg, E.J., Agrawal, P.B., Beggs, A.H., Dara Hama-Amin, A., Diekstra, A., Knoers, N.V.A.M., Lammens, M., and van Alfen, N.
Published: 2012
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15. Clustered mutations in the GRIK2 kainate receptor subunit gene underlie diverse neurodevelopmental disorders (vol 108, pg 1692, 2021)

Author: Stolz, J.R., Foote, K.M., Veenstra-Knol, H.E., Pfundt, R., Broeke, S.W. ten, Leeuw, N. de, Roht, L., Pajusalu, S., Part, R., Rebane, I., Ounap, K., Stark, Z., Kirk, E.P., Lawson, J.A., Lunke, S., Christodoulou, J., Louie, R.J., Rogers, R.C., Davis, J.M., Innes, A.M., Wei, X.C., Keren, B., Mignot, C., Lebel, R.R., Sperber, S.M., Sakonju, A., Dosa, N., Barge-Schaapveld, D.Q.C.M., Peeters-Scholte, C.M.P.C.D., Ruivenkamp, C.A.L., Bon, B.W. van, Kennedy, J., Low, K.J., Ellard, S., Pang, L.W., Junewick, J.J., Mark, P.R., Carvill, G.L., and Swanson, G.T.
Published: 2021

16. Detectie van submicroscopische chromosomale afwijkingen door middel van array-diagnostiek: De meerwaarde en de valkuilen in de prenatale en postnatale diagnostiek

Author: Zwijnenburg, P.J.G., Lakeman, P., Pfundt, R., Klein Wassink-Ruiter, J.S., Kerstjens-Frederikse, W.S., and van Ravenswaaij-Arts, C.M.A.
Published: 2014
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17. The MECP2 variant c.925C>T (p.Arg309Trp) causes intellectual disability in both males and females without classic features of Rett syndrome

Author: Schönewolf-Greulich, B., Tejada, M.-I., Stephens, K., Hadzsiev, K., Gauthier, J., Brndum-Nielsen, K., Pfundt, R., Ravn, K., Maortua, H., Gener, B., Martínez-Bouzas, C., Piton, A., Rouleau, G., Clayton-Smith, J., Kleefstra, T., Bisgaard, A.-M., and Tümer, Z.
Published: 2016
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18. Extending the phenotype of recurrent rearrangements of 16p11.2: Deletions in mentally retarded patients without autism and in normal individuals

Author: Bijlsma, E.K., Gijsbers, A.C.J., Schuurs-Hoeijmakers, J.H.M., van Haeringen, A., Fransen van de Putte, D.E., Anderlid, B.-M., Lundin, J., Lapunzina, P., Pérez Jurado, L.A., Delle Chiaie, B., Loeys, B., Menten, B., Oostra, A., Verhelst, H., Amor, D.J., Bruno, D.L., van Essen, A.J., Hordijk, R., Sikkema-Raddatz, B., Verbruggen, K.T., Jongmans, M.C.J., Pfundt, R., Reeser, H.M., Breuning, M.H., and Ruivenkamp, C.A.L.
Published: 2009
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19. DLG4-related synaptopathy: a new rare brain disorder

Author: Rodríguez-Palmero, A., Boerrigter, M.M., Gómez-Andrés, D., Aldinger, K.A., Marcos-Alcalde, Í., Popp, B., Everman, D.B., Lovgren, A.K., Arpin, S., Bahrambeigi, V., Beunders, G., Bisgaard, A.M., Bjerregaard, V.A., Bruel, A.L., Challman, T.D., Cogné, B., Coubes, C., Man, S.A. de, Denommé-Pichon, A.S., Dye, T.J., Elmslie, F., Feuk, L., García-Miñaúr, S., Gertler, T., Giorgio, E., Gruchy, N., Haack, T.B., Haldeman-Englert, C.R., Haukanes, B.I., Hoyer, J., Hurst, A.C.E., Isidor, B., Soller, M.J., Kushary, S., Kvarnung, M., Landau, Y.E., Leppig, K.A., Lindstrand, A., Kleinendorst, L., Mackenzie, A., Mandrile, G., Mendelsohn, B.A., Moghadasi, S., Morton, J.E., Moutton, S., Müller, A.J., O'Leary, M., Pacio-Míguez, M., Palomares-Bralo, M., Parikh, S., Pfundt, R., Pode-Shakked, B., Rauch, A., Repnikova, E., Revah-Politi, A., Ross, M.J., Ruivenkamp, C.A.L., Sarrazin, E., Savatt, J.M., Schlüter, A., Schönewolf-Greulich, B., Shad, Z., Shaw-Smith, C., Shieh, J.T., Shohat, M., Spranger, S., Thiese, H., Mau-Them, F.T., Bon, B. van, Burgt, I. van der, Laar, I. van de, Drie, E. van, Haelst, M.M. van, Ravenswaaij-Arts, C.M.A. van, Verdura, E., Vitobello, A., Waldmüller, S., Whiting, S., Zweier, C., Prada, C.E., Vries, B.B. de, Dobyns, W.B., Reiter, S.F., Gómez-Puertas, P., Pujol, A., Tümer, Z., Rodríguez-Palmero, A., Boerrigter, M.M., Gómez-Andrés, D., Aldinger, K.A., Marcos-Alcalde, Í., Popp, B., Everman, D.B., Lovgren, A.K., Arpin, S., Bahrambeigi, V., Beunders, G., Bisgaard, A.M., Bjerregaard, V.A., Bruel, A.L., Challman, T.D., Cogné, B., Coubes, C., Man, S.A. de, Denommé-Pichon, A.S., Dye, T.J., Elmslie, F., Feuk, L., García-Miñaúr, S., Gertler, T., Giorgio, E., Gruchy, N., Haack, T.B., Haldeman-Englert, C.R., Haukanes, B.I., Hoyer, J., Hurst, A.C.E., Isidor, B., Soller, M.J., Kushary, S., Kvarnung, M., Landau, Y.E., Leppig, K.A., Lindstrand, A., Kleinendorst, L., Mackenzie, A., Mandrile, G., Mendelsohn, B.A., Moghadasi, S., Morton, J.E., Moutton, S., Müller, A.J., O'Leary, M., Pacio-Míguez, M., Palomares-Bralo, M., Parikh, S., Pfundt, R., Pode-Shakked, B., Rauch, A., Repnikova, E., Revah-Politi, A., Ross, M.J., Ruivenkamp, C.A.L., Sarrazin, E., Savatt, J.M., Schlüter, A., Schönewolf-Greulich, B., Shad, Z., Shaw-Smith, C., Shieh, J.T., Shohat, M., Spranger, S., Thiese, H., Mau-Them, F.T., Bon, B. van, Burgt, I. van der, Laar, I. van de, Drie, E. van, Haelst, M.M. van, Ravenswaaij-Arts, C.M.A. van, Verdura, E., Vitobello, A., Waldmüller, S., Whiting, S., Zweier, C., Prada, C.E., Vries, B.B. de, Dobyns, W.B., Reiter, S.F., Gómez-Puertas, P., Pujol, A., and Tümer, Z.
Abstract: Contains fulltext : 245031.pdf (Publisher’s version ) (Closed access), PURPOSE: Postsynaptic density protein-95 (PSD-95), encoded by DLG4, regulates excitatory synaptic function in the brain. Here we present the clinical and genetic features of 53 patients (42 previously unpublished) with DLG4 variants. METHODS: The clinical and genetic information were collected through GeneMatcher collaboration. All the individuals were investigated by local clinicians and the gene variants were identified by clinical exome/genome sequencing. RESULTS: The clinical picture was predominated by early onset global developmental delay, intellectual disability, autism spectrum disorder, and attention deficit-hyperactivity disorder, all of which point to a brain disorder. Marfanoid habitus, which was previously suggested to be a characteristic feature of DLG4-related phenotypes, was found in only nine individuals and despite some overlapping features, a distinct facial dysmorphism could not be established. Of the 45 different DLG4 variants, 39 were predicted to lead to loss of protein function and the majority occurred de novo (four with unknown origin). The six missense variants identified were suggested to lead to structural or functional changes by protein modeling studies. CONCLUSION: The present study shows that clinical manifestations associated with DLG4 overlap with those found in other neurodevelopmental disorders of synaptic dysfunction; thus, we designate this group of disorders as DLG4-related synaptopathy.
Published: 2021

20. Comprehensive study of 28 individuals with SIN3A-related disorder underscoring the associated mild cognitive and distinctive facial phenotype

Author: Balasubramanian, M. (Meena), Dingemans, A.J.M. (Alexander J. M.), Albaba, S. (Shadi), Richardson, R. (Ruth), Yates, T.M. (Thabo M.), Cox, H. (H.), Douzgou, S. (Sofia), Armstrong, R. (Ruth), Sansbury, F.H. (Francis H.), Burke, K.B. (Katherine B.), Fry, A.E. (Andrew E.), Ragge, N. (Nicola), Sharif, S. (Saba), Foster, A. (Alison), Sandre-Giovannoli, A. (Annachiara) de, Elouej, S. (Sahar), Vasudevan, P. (Pradeep), Mansour, S. (Sahar), Wilson, K. (Kate), Stewart, H. (Helen), Heide, S. (Solveig), Nava, C. (Caroline), Keren, B. (Boris), Demirdas, S. (Serwet), Brooks, A.S. (Alice S.), Vincent, M. (Marie), Isidor, B. (Bertrand), Küry, S. (Sebastien), Schouten, M. (Meyke), Leenders, E. (Erika), Chung, W. (Wendy), Haeringen, A. (Arie van), Scheffner, T. (Thomas), Debray, F.-G. (Francois-Guillaume), White, S.M. (Susan M.), Palafoll, M.I.V. (Maria Irene Valenzuela), Pfundt, R. (Rolph), Newbury-Ecob, R. (Ruth), Kleefstra, T. (Tjitske), Balasubramanian, M. (Meena), Dingemans, A.J.M. (Alexander J. M.), Albaba, S. (Shadi), Richardson, R. (Ruth), Yates, T.M. (Thabo M.), Cox, H. (H.), Douzgou, S. (Sofia), Armstrong, R. (Ruth), Sansbury, F.H. (Francis H.), Burke, K.B. (Katherine B.), Fry, A.E. (Andrew E.), Ragge, N. (Nicola), Sharif, S. (Saba), Foster, A. (Alison), Sandre-Giovannoli, A. (Annachiara) de, Elouej, S. (Sahar), Vasudevan, P. (Pradeep), Mansour, S. (Sahar), Wilson, K. (Kate), Stewart, H. (Helen), Heide, S. (Solveig), Nava, C. (Caroline), Keren, B. (Boris), Demirdas, S. (Serwet), Brooks, A.S. (Alice S.), Vincent, M. (Marie), Isidor, B. (Bertrand), Küry, S. (Sebastien), Schouten, M. (Meyke), Leenders, E. (Erika), Chung, W. (Wendy), Haeringen, A. (Arie van), Scheffner, T. (Thomas), Debray, F.-G. (Francois-Guillaume), White, S.M. (Susan M.), Palafoll, M.I.V. (Maria Irene Valenzuela), Pfundt, R. (Rolph), Newbury-Ecob, R. (Ruth), and Kleefstra, T. (Tjitske)
Abstract: Witteveen-Kolk syndrome (OMIM 613406) is a recently defined neurodevelopmental syndrome caused by heterozygous loss-of-function variants in SIN3A. We define the clinical and neurodevelopmental phenotypes related to SIN3A-haploinsufficiency in 28 unreported patients. Patients with SIN3A variants adversely affecting protein function have mild intellectual disability, growth and feeding difficulties. Involvement of a multidisciplinary team including a geneticist, paediatrician and neurologist should be considered in managing these patients. Patients described here were identified through a combination of clinical evaluation and gene matching strategies (GeneMatcher and Decipher). All patients consented to participate in this study. Mean age of this cohort was 8.2 years (17 males, 11 females). Out of 16 patients ≥ 8 years old assessed, eight (50%) had mild intellectual disability (ID), four had moderate ID (22%), and one had severe ID (6%). Four (25%) did not have any cognitive impairment. Other neurological symptoms such as seizures (4/28) and hypotonia (12/28) were common. Behaviour problems were reported in a minority. In patients ≥2 years, three were diagnosed with Autism Spectrum Disorder (ASD) and four with Attention Deficit Hyperactivity Disorder (ADHD). We report 27 novel variants and one previously reported variant. 24 were truncating variants; three were missense variants and one large in-frame gain including exons 10–12.
Published: 2021
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21. Comprehensive study of 28 individuals with SIN3A-related disorder underscoring the associated mild cognitive and distinctive facial phenotype

Author: Balasubramanian, M, Dingemans, AJM, Albaba, S, Richardson, R, Yates, TM, Cox, H, Douzgou, S, Armstrong, R, Sansbury, FH, Burke, KB, Fry, AE, Ragge, N, Sharif, S, Foster, A, De Sandre-Giovannoli, A, Elouej, S, Vasudevan, P, Mansour, S, Wilson, K, Stewart, H, Heide, S, Nava, C, Keren, B, Demirdas, S, Brooks, AS, Vincent, M, Isidor, B, Kury, S, Schouten, M, Leenders, E, Chung, WK, Haeringen, AV, Scheffner, T, Debray, F-G, White, SM, Palafoll, MIV, Pfundt, R, Newbury-Ecob, R, Kleefstra, T, Balasubramanian, M, Dingemans, AJM, Albaba, S, Richardson, R, Yates, TM, Cox, H, Douzgou, S, Armstrong, R, Sansbury, FH, Burke, KB, Fry, AE, Ragge, N, Sharif, S, Foster, A, De Sandre-Giovannoli, A, Elouej, S, Vasudevan, P, Mansour, S, Wilson, K, Stewart, H, Heide, S, Nava, C, Keren, B, Demirdas, S, Brooks, AS, Vincent, M, Isidor, B, Kury, S, Schouten, M, Leenders, E, Chung, WK, Haeringen, AV, Scheffner, T, Debray, F-G, White, SM, Palafoll, MIV, Pfundt, R, Newbury-Ecob, R, and Kleefstra, T
Abstract: Witteveen-Kolk syndrome (OMIM 613406) is a recently defined neurodevelopmental syndrome caused by heterozygous loss-of-function variants in SIN3A. We define the clinical and neurodevelopmental phenotypes related to SIN3A-haploinsufficiency in 28 unreported patients. Patients with SIN3A variants adversely affecting protein function have mild intellectual disability, growth and feeding difficulties. Involvement of a multidisciplinary team including a geneticist, paediatrician and neurologist should be considered in managing these patients. Patients described here were identified through a combination of clinical evaluation and gene matching strategies (GeneMatcher and Decipher). All patients consented to participate in this study. Mean age of this cohort was 8.2 years (17 males, 11 females). Out of 16 patients ≥ 8 years old assessed, eight (50%) had mild intellectual disability (ID), four had moderate ID (22%), and one had severe ID (6%). Four (25%) did not have any cognitive impairment. Other neurological symptoms such as seizures (4/28) and hypotonia (12/28) were common. Behaviour problems were reported in a minority. In patients ≥2 years, three were diagnosed with Autism Spectrum Disorder (ASD) and four with Attention Deficit Hyperactivity Disorder (ADHD). We report 27 novel variants and one previously reported variant. 24 were truncating variants; three were missense variants and one large in-frame gain including exons 10-12.
Published: 2021

22. Comprehensive study of 28 individuals with SIN3A-related disorder underscoring the associated mild cognitive and distinctive facial phenotype

Author: Balasubramanian M, Dingemans AJM, lbaba S, Richardson R, Yates TM, Cox H, Douzgou S, Armstrong R, Sansbury FH, Burke KB, Fry AE, Ragge N, Sharif S, Foster A, De Sandre-Giovannoli A, Elouej S, Vasudevan P, Mansour S, Wilson K, Stewart H, Heide S, Nava C, Keren B, Demirdas S, Brooks AS, Vincent M, Isidor B, Küry S, Schouten M, Leenders E, Chung WK, van Haeringen A, Scheffner T, Debray F, White SM, Valenzuela Palafoll MI, Pfundt R, Newbury-Ecob R, Kleefstra T, Balasubramanian M, Dingemans AJM, lbaba S, Richardson R, Yates TM, Cox H, Douzgou S, Armstrong R, Sansbury FH, Burke KB, Fry AE, Ragge N, Sharif S, Foster A, De Sandre-Giovannoli A, Elouej S, Vasudevan P, Mansour S, Wilson K, Stewart H, Heide S, Nava C, Keren B, Demirdas S, Brooks AS, Vincent M, Isidor B, Küry S, Schouten M, Leenders E, Chung WK, van Haeringen A, Scheffner T, Debray F, White SM, Valenzuela Palafoll MI, Pfundt R, Newbury-Ecob R, and Kleefstra T
Abstract: Witteveen-Kolk syndrome (OMIM 613406) is a recently defined neurodevelopmental syndrome caused by heterozygous loss-of-function variants in SIN3A. We define the clinical and neurodevelopmental phenotypes related to SIN3A-haploinsufficiency in 28 unreported patients. Patients with SIN3A variants adversely affecting protein function have mild intellectual disability, growth and feeding difficulties. Involvement of a multidisciplinary team including a geneticist, pediatrician and neurologist should be considered in managing these patients. Patients described here were identified through a combination of clinical evaluation and gene matching strategies (GeneMatcher and Decipher). All patients consented to participate in this study. Mean age of this cohort was 8.2 years (17 males, 11 females). Out of 16 patients ≥ eight years old assessed, eight (50%) had mild intellectual disability (ID), four had moderate ID (22%), and one had severe ID (6%). Four (25%) did not have any cognitive impairment. Other neurological symptoms such as seizures (4/28) and hypotonia (12/28) were common. Behaviour problems were reported in a minority. In patients ≥2 years, three were diagnosed with Autism Spectrum Disorder (ASD) and four with Attention Deficit Hyperactivity Disorder (ADHD). We report 27 novel variants and one previously reported variant. 24 were truncating variants; three were missense variants and one large in-frame gain including exons 10-12.
Published: 2021

23. Loss-of-function truncating and missense variants in NSD2 cause decreased methylation activity and are associated with a distinct neurodevelopmental phenotype

Author: Zanoni, P., Steindl, K., Sengupta, D., Sticht, H., Joset, P., Baar, A., van Ravenswaaij-Arts, C. M. A., Shinawi, M., Maystadt, I., Belnap, N., Benoit, V., de Vries, B. B. A., Lacombe, D., Larson, A., Pfundt, R., Ramsey, K., Blok, L. Snijders, Wheeler, P. G., Wevers, M. R., Gozani, O., Rauch, A., and Clinical Cognitive Neuropsychiatry Research Program (CCNP)
Published: 2020

24. Location, location, location: protein truncating variants in different loci of SRCAP cause three distinct neurodevelopmental disorders, associated with distinctive DNA methylation signatures

Author: Rots, D., Chater-Diehl, E., Dingemans, A. J. M., Siu, M., Cytrynbaum, C., Hoang, N., Walker, S., Scherer, S., Pfundt, R., Rinne, T., Gardeitchik, T., Vries, B. B. A., Stumpel, C. T. R. M., Stevens, S. J. C., Harssel, J., Bosch, D. G. M., Gassen, K. L. I., Binsbergen, E., Geus, C. M., Hempel, M., Lessel, D., Denecke, J., Slavotinek, A., Strober, J., Lilian Bomme Ousager, Martin Jakob Larsen, Schultz-Rogers, L., Morava, E., Klee, E. W., Berry, I. R., Campbell, J., Lindstrom, K., Neumeyer, A. M., Radley, J. A., Phornphutkul, C., Wilson, W. G., Schmidt, B., Meyn, S., Ounap, K., Reinson, K., Pajusalu, S., Ruivenkamp, C., Haeringen, A., Cuperus, R., Vissers, L. E. L. M., Brunner, H. G., Kleefstra, T., Koolen, D. A., Weksberg, R., and GeneDx Inc
Published: 2020

25. Pathogenic or not? Assessing the clinical relevance of copy number variants

Author: Hehir-Kwa, J Y, Pfundt, R, Veltman, J A, and de Leeuw, N
Published: 2013
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26. Complex chromosome 17p rearrangements associated with low-copy repeats in two patients with congenital anomalies

Author: Vissers, L. E. L. M., Stankiewicz, P., Yatsenko, S. A., Crawford, E., Creswick, H., Proud, V. K., de Vries, B. B. A., Pfundt, R., Marcelis, C. L. M., Zackowski, J., Bi, W., van Kessel, A. Geurts, Lupski, J. R., and Veltman, J. A.
Published: 2007
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27. Evidence for 28 genetic disorders discovered by combining healthcare and research data

Author: Kaplanis, J., Samocha, K.E., Wiel, L., Zhang, Z., Arvai, K.J., Eberhardt, R.Y., Gallone, G., Lelieveld, S.H., Martin, H.C., McRae, J.F., Short, P.J., Torene, R.I., de Boer, E., Danecek, P., Gardner, E.J., Huang, N., Lord, J., Martincorena, I., Pfundt, R., Reijnders, M.R.F., Yeung, A., Yntema, H.G., Deciphering Developmental Disorders Study, Vissers, L.E.L.M., Juusola, J., Wright, C.F., Brunner, H.G., Firth, H.V., FitzPatrick, D.R., Barrett, J.C., Hurles, M.E., Gilissen, C., and Retterer, K.
Abstract: De novo mutations in protein-coding genes are a well-established cause of developmental disorders. However, genes known to be associated with developmental disorders account for only a minority of the observed excess of such de novo mutations. Here, to identify previously undescribed genes associated with developmental disorders, we integrate healthcare and research exome-sequence data from 31,058 parent–offspring trios of individuals with developmental disorders, and develop a simulation-based statistical test to identify gene-specific enrichment of de novo mutations. We identified 285 genes that were significantly associated with developmental disorders, including 28 that had not previously been robustly associated with developmental disorders. Although we detected more genes associated with developmental disorders, much of the excess of de novo mutations in protein-coding genes remains unaccounted for. Modelling suggests that more than 1,000 genes associated with developmental disorders have not yet been described, many of which are likely to be less penetrant than the currently known genes. Research access to clinical diagnostic datasets will be critical for completing the map of genes associated with developmental disorders.
Published: 2020

28. De Novo and Bi-allelic Pathogenic Variants in NARS1 Cause Neurodevelopmental Delay Due to Toxic Gain-of-Function and Partial Loss-of-Function Effects

Author: Manole, A, Efthymiou, S, O'Connor, E, Mendes, MI, Jennings, M, Maroofian, R, Davagnanam, I, Mankad, K, Lopez, MR, Salpietro, V, Harripaul, R, Badalato, L, Walia, J, Francklyn, CS, Athanasiou-Fragkouli, A, Sullivan, R, Desai, S, Baranano, K, Zafar, F, Rana, N, Ilyas, M, Horga, A, Kara, M, Mattioli, F, Goldenberg, A, Griffin, H, Piton, A, Henderson, LB, Kara, B, Aslanger, AD, Raaphorst, J, Pfundt, R, Portier, R, Shinawi, M, Kirby, A, Christensen, KM, Wang, L, Rosti, RO, Paracha, SA, Sarwar, MT, Jenkins, D, SYNAPS Study Group, Ahmed, J, Santoni, FA, Ranza, E, Iwaszkiewicz, J, Cytrynbaum, C, Weksberg, R, Wentzensen, IM, Guillen Sacoto, MJ, Si, Y, Telegrafi, A, Andrews, MV, Baldridge, D, Gabriel, H, Mohr, J, Oehl-Jaschkowitz, B, Debard, S, Senger, B, Fischer, F, van Ravenwaaij, C, Fock, AJM, Stevens, SJC, Bähler, J, Nasar, A, Mantovani, JF, Manzur, A, Sarkozy, A, Smith, DEC, Salomons, GS, Ahmed, ZM, Riazuddin, S, Usmani, MA, Seibt, A, Ansar, M, Antonarakis, SE, Vincent, JB, Ayub, M, Grimmel, M, Jelsig, AM, Hjortshøj, TD, Karstensen, HG, Hummel, M, Haack, TB, Jamshidi, Y, Distelmaier, F, Horvath, R, Gleeson, JG, Becker, H, Mandel, J-L, Koolen, DA, and Houlden, H
Abstract: Aminoacyl-tRNA synthetases (ARSs) are ubiquitous, ancient enzymes that charge amino acids to cognate tRNA molecules, the essential first step of protein translation. Here, we describe 32 individuals from 21 families, presenting with microcephaly, neurodevelopmental delay, seizures, peripheral neuropathy, and ataxia, with de novo heterozygous and bi-allelic mutations in asparaginyl-tRNA synthetase (NARS1). We demonstrate a reduction in NARS1 mRNA expression as well as in NARS1 enzyme levels and activity in both individual fibroblasts and induced neural progenitor cells (iNPCs). Molecular modeling of the recessive c.1633C>T (p.Arg545Cys) variant shows weaker spatial positioning and tRNA selectivity. We conclude that de novo and bi-allelic mutations in NARS1 are a significant cause of neurodevelopmental disease, where the mechanism for de novo variants could be toxic gain-of-function and for recessive variants, partial loss-of-function.
Published: 2020

29. Identification of novel genomic markers related to progression to glioblastoma through genomic profiling of 25 primary glioma cell lines

Author: Roversi, G, Pfundt, R, Moroni, R F, Magnani, I, van Reijmersdal, S, Pollo, B, Straatman, H, Larizza, L, and Schoenmakers, E F P M
Published: 2006
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30. A de novo CTNNB1 Novel Splice Variant in an Adult Female with Severe Intellectual Disability

Author: Verhoeven, W.M.A., Egger, J.I.M. (Jos), Jongbloed, R.E., van Putten, M.M., de Bruijn-van Zandwijk, M., Zwemer, A.S., Pfundt, R. (Rolph), Willemsen, M.H. (Marjolein), Verhoeven, W.M.A., Egger, J.I.M. (Jos), Jongbloed, R.E., van Putten, M.M., de Bruijn-van Zandwijk, M., Zwemer, A.S., Pfundt, R. (Rolph), and Willemsen, M.H. (Marjolein)
Abstract: The catenin beta-1 (CTNNB1) gene, encoding a sub-unit of the cadherin/catenin protein complex that is involved in the Wnt signalling pathway important for proper interneuron development, is considered to be causative for the rare autosomal dominant mental retardation syndrome, formerly called MRD19 but later renamed neurodevelopmental disorder with spastic diplegia and visual defects (NEDSDV). Its main characteristics are moderate to severe intellectual disability (ID), disruptive autistic behaviours, microcephaly, absent or limited speech, facial dysmorphisms, peripheral hypertonia/spasticity, motor delay and visual defects. So far, 35 patients have been reported with a de novo loss-of-function variant in CTNNB1. In two other patients, a deletion comprising the full gene was found. Four out of the 37 patients were of adult age (range: 27–51 years), while the majority was infant or adolescent (range: 0–20 years). Here, a 32-year-old severely intellectually disabled female patient is described in whom exome sequencing disclosed a de novo heterozygous splice site variant in the CTNNB1 gene [Chr3(GRCh37): g.41267064G>T; NM_001904.3: 23. c.734+1G>T; r. spl?]. Somatic investigation disclosed significant microcephaly and minor facial dysmorphisms. Neurological examination demonstrated severe kyphoscoliosis, distal spastic tetraparesis, especially of the legs with increased tendon reflexes and bilateral Babinski sign, resulting in severely impaired walking capability with a broad-based gait. Apart from strabismus, no ophthalmological abnormalities were found. Here, the reported variant in the CTNNB1 gene was not published earlier nor is included in the international databases. This specific variant is considered to be causative for the severe ID, autism and the somato-neurological phenotype of the patient and corresponds with a diagnosis of NEDSDV.
Published: 2020
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31. Rapid whole exome sequencing in pregnancies to identify the underlying genetic cause in fetuses with congenital anomalies detected by ultrasound imaging

Author: Deden, C. (Chantal), Neveling, K. (Kornelia), Zafeiropopoulou, D. (Dimitra), Gilissen, C. (Christian), Pfundt, R. (Rolph), Rinne, T. (Tuula), Leeuw, N. (Nicole) de, Faas, B.H.W. (Brigitte), Gardeitchik, T. (Thatjana), Sallevelt, S.C.E.H. (Suzanne), Paulussen, A.D.C. (Aimée), Stevens, S.J.C. (Servi J. C.), Sikkel, E. (Esther), Elting, M. (Mariet), Maarle, M.C. (Merel), Diderich, K.E.M. (Karin), Corsten-Janssen, N. (Nicole), Lichtenbelt, K.D. (Klaske), Lachmeijer, G. (Guus), Vissers, L.E.L.M., Yntema, H.G., Nelen, M. (Marcel), Feenstra, I. (Ilse), Zelst-Stams, W.A. van, Deden, C. (Chantal), Neveling, K. (Kornelia), Zafeiropopoulou, D. (Dimitra), Gilissen, C. (Christian), Pfundt, R. (Rolph), Rinne, T. (Tuula), Leeuw, N. (Nicole) de, Faas, B.H.W. (Brigitte), Gardeitchik, T. (Thatjana), Sallevelt, S.C.E.H. (Suzanne), Paulussen, A.D.C. (Aimée), Stevens, S.J.C. (Servi J. C.), Sikkel, E. (Esther), Elting, M. (Mariet), Maarle, M.C. (Merel), Diderich, K.E.M. (Karin), Corsten-Janssen, N. (Nicole), Lichtenbelt, K.D. (Klaske), Lachmeijer, G. (Guus), Vissers, L.E.L.M., Yntema, H.G., Nelen, M. (Marcel), Feenstra, I. (Ilse), and Zelst-Stams, W.A. van
Abstract: Objective: The purpose of this study was to explore the diagnostic yield and clinical utility of trio-based rapid whole exome sequencing (rWES) in pregnancies of fetuses with a wide range of congenital anomalies detected by ultrasound imaging. Methods: In this observational study, we analyzed the first 54 cases referred to our laboratory for prenatal rWES to support clinical decision making, after the sonographic detection of fetal congenital anomalies. The most common identified congenital anomalies were skeletal dysplasia (n = 20), multiple major fetal congenital anomalies (n = 17) and intracerebral structural anomalies (n = 7). Results: A conclusive diagnosis was identified in 18 of the 54 cases (33%). Pathogenic variants were detected most often in fetuses with skeletal dysplasia (n = 11) followed by fetuses with multiple major fetal congenital anomalies (n = 4) and intracerebral structural anomalies (n = 3). A survey, completed by the physicians for 37 of 54 cases, indicated that the rWES results impacted clinical decision making in 68% of cases. Conclusions: These results suggest that rWES improves prenatal diagnosis of fetuses with congenital anomalies, and has an important impact on prenatal and peripartum parental and clinical decision making.
Published: 2020
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32. Loss-of-function mutations in UDP-Glucose 6-Dehydrogenase cause recessive developmental epileptic encephalopathy

Author: Hengel, H. (Holger), Bosso-Lefèvre, C. (Célia), Grady, G. (George), Szenker-Ravi, E. (Emmanuelle), Li, H. (Hankun), Pierce, S. (Sarah), Lebigot, É. (Élise), Tan, T.-T. (Thong-Teck), Eio, M.Y. (Michelle Y.), Narayanan, G. (Gunaseelan), Utami, K.H. (Kagistia Hana), Yau, M. (Monica), Handal, N. (Nader), Deigendesch, W. (Werner), Keimer, R. (Reinhard), Marzouqa, H.M. (Hiyam M.), Gunay-Aygun, M. (Meral), Muriello, M.J. (Michael J.), Verhelst, H. (H.), Weckhuysen, S. (Sarah), Mahida, S. (Sonal), Naidu, S. (Sakkubai), Thomas, T.G. (Terrence G.), Lim, J.Y. (Jiin Ying), Tan, E.S. (Ee Shien), Haye, D. (Damien), Willemsen, M.A. (Michél), Oegema, R. (Renske), Mitchell, W.G. (Wendy G.), Pierson, T.M. (Tyler Mark), Andrews, M.V. (Marisa V.), Willing, M.C. (Marcia C.), Rodan, L.H. (Lance H.), Barakat, T.S. (Tahsin Stefan), Slegtenhorst, M.A. (Marjon) van, Gavrilova, R.H. (Ralitza H.), Martinelli, D. (Diego), Gilboa, T. (Tal), Tamim, A.M. (Abdullah M.), Hashem, M.O. (Mais O.), AlSayed, M.D. (Moeenaldeen D.), Abdulrahim, M.M. (Maha M.), Al-Owain, M. (Mohammed), Awaji, A. (Ali), Mahmoud, A.A.H. (Adel A. H.), Faqeih, E.A. (Eissa A.), Asmari, A.A. (Ali Al), Algain, S.M. (Sulwan M.), Jad, L.A. (Lamyaa A.), Aldhalaan, H.M. (Hesham M.), Helbig, I. (Ingo), Koolen, D.A. (David), Rieß, A. (Angelika), Kraegeloh-Mann, I. (Ingeborg), Bauer, P. (Peter), Gulsuner, S. (Suleyman), Stamberger, H. (Hannah), Ng, A.Y.J. (Alvin Yu Jin), Tang, S. (Sha), Tohari, S. (Sumanty), Keren, B. (Boris), Schultz-Rogers, L.E. (Laura E.), Klee, E.W. (Eric W.), Barresi, S. (Sabina), Tartaglia, M. (Marco), Mor-Shaked, H. (Hagar), Maddirevula, S. (Sateesh), Begtrup, A. (Amber), Telegrafi, A. (Aida), Pfundt, R. (Rolph), Schüle, R. (Rebecca), Ciruna, B. (Brian), Bonnard, C. (Carine), Pouladi, M.A. (Mahmoud A.), Stewart, J.C. (James C.), Claridge-Chang, A. (Adam), Lefeber, D.J. (Dirk J.), Alkuraya, F.S. (Fowzan S), Mathuru, A.S. (Ajay S.), Venkatesh, B. (Byrappa), Barycki, J.J. (Joseph J.), Simpson, M.A. (Melanie A.), Jamuar, S.S. (Saumya S.), Schöls, L. (Ludger), Reversade, B. (Bruno), Hengel, H. (Holger), Bosso-Lefèvre, C. (Célia), Grady, G. (George), Szenker-Ravi, E. (Emmanuelle), Li, H. (Hankun), Pierce, S. (Sarah), Lebigot, É. (Élise), Tan, T.-T. (Thong-Teck), Eio, M.Y. (Michelle Y.), Narayanan, G. (Gunaseelan), Utami, K.H. (Kagistia Hana), Yau, M. (Monica), Handal, N. (Nader), Deigendesch, W. (Werner), Keimer, R. (Reinhard), Marzouqa, H.M. (Hiyam M.), Gunay-Aygun, M. (Meral), Muriello, M.J. (Michael J.), Verhelst, H. (H.), Weckhuysen, S. (Sarah), Mahida, S. (Sonal), Naidu, S. (Sakkubai), Thomas, T.G. (Terrence G.), Lim, J.Y. (Jiin Ying), Tan, E.S. (Ee Shien), Haye, D. (Damien), Willemsen, M.A. (Michél), Oegema, R. (Renske), Mitchell, W.G. (Wendy G.), Pierson, T.M. (Tyler Mark), Andrews, M.V. (Marisa V.), Willing, M.C. (Marcia C.), Rodan, L.H. (Lance H.), Barakat, T.S. (Tahsin Stefan), Slegtenhorst, M.A. (Marjon) van, Gavrilova, R.H. (Ralitza H.), Martinelli, D. (Diego), Gilboa, T. (Tal), Tamim, A.M. (Abdullah M.), Hashem, M.O. (Mais O.), AlSayed, M.D. (Moeenaldeen D.), Abdulrahim, M.M. (Maha M.), Al-Owain, M. (Mohammed), Awaji, A. (Ali), Mahmoud, A.A.H. (Adel A. H.), Faqeih, E.A. (Eissa A.), Asmari, A.A. (Ali Al), Algain, S.M. (Sulwan M.), Jad, L.A. (Lamyaa A.), Aldhalaan, H.M. (Hesham M.), Helbig, I. (Ingo), Koolen, D.A. (David), Rieß, A. (Angelika), Kraegeloh-Mann, I. (Ingeborg), Bauer, P. (Peter), Gulsuner, S. (Suleyman), Stamberger, H. (Hannah), Ng, A.Y.J. (Alvin Yu Jin), Tang, S. (Sha), Tohari, S. (Sumanty), Keren, B. (Boris), Schultz-Rogers, L.E. (Laura E.), Klee, E.W. (Eric W.), Barresi, S. (Sabina), Tartaglia, M. (Marco), Mor-Shaked, H. (Hagar), Maddirevula, S. (Sateesh), Begtrup, A. (Amber), Telegrafi, A. (Aida), Pfundt, R. (Rolph), Schüle, R. (Rebecca), Ciruna, B. (Brian), Bonnard, C. (Carine), Pouladi, M.A. (Mahmoud A.), Stewart, J.C. (James C.), Claridge-Chang, A. (Adam), Lefeber, D.J. (Dirk J.), Alkuraya, F.S. (Fowzan S), Mathuru, A.S. (Ajay S.), Venkatesh, B. (Byrappa), Barycki, J.J. (Joseph J.), Simpson, M.A. (Melanie A.), Jamuar, S.S. (Saumya S.), Schöls, L. (Ludger), and Reversade, B. (Bruno)
Abstract: Developmental epileptic encephalopathies are devastating disorders characterized by intractable epileptic seizures and developmental delay. Here, we report an allelic series of germline recessive mutations in UGDH in 36 cases from 25 families presenting with epileptic encephalopathy with developmental delay and hypotonia. UGDH encodes an oxidoreductase that converts UDP-glucose to UDP-glucuronic acid, a key component of specific proteoglycans and glycolipids. Consistent with being loss-of-function alleles, we show using patients’ primary fibroblasts and biochemical assays, that these mutations either impair UGDH stability, oligomerization, or enzymatic activity. In vitro, patient-derived cerebral organoids are smaller with a reduced number of proliferating neuronal progenitors while mutant ugdh zebrafish do not phenocopy the human disease. Our study defines UGDH as a key player for the production of extracellular matrix components that are essential for human brain development. Based on the incidence of variants observed, UGDH mutations are likely to be a frequent cause of recessive epileptic encephalopathy.
Published: 2020
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33. De novo CLTC variants are associated with a variable phenotype from mild to severe intellectual disability, microcephaly, hypoplasia of the corpus callosum, and epilepsy

Author: Sa, MJN, Venselaar, H, Wiel, L, Trimouille, A, Lasseaux, E, Naudion, S, Lacombe, D, Piton, A, Vincent-Delorme, C, Zweier, C, Reis, A, Trollmann, R, Ruiz, A, Gabau, E, Vetro, A, Guerrini, R, Bakhtiari, S, Kruer, MC, Amor, DJ, Cooper, MS, Bijlsma, EK, Barakat, TS, van Dooren, MF, van Slegtenhorst, M, Pfundt, R, Gilissen, C, Willemsen, MA, de Vries, BBA, de Brouwer, APM, Koolen, DA, Sa, MJN, Venselaar, H, Wiel, L, Trimouille, A, Lasseaux, E, Naudion, S, Lacombe, D, Piton, A, Vincent-Delorme, C, Zweier, C, Reis, A, Trollmann, R, Ruiz, A, Gabau, E, Vetro, A, Guerrini, R, Bakhtiari, S, Kruer, MC, Amor, DJ, Cooper, MS, Bijlsma, EK, Barakat, TS, van Dooren, MF, van Slegtenhorst, M, Pfundt, R, Gilissen, C, Willemsen, MA, de Vries, BBA, de Brouwer, APM, and Koolen, DA
Abstract: PURPOSE: To delineate the genotype-phenotype correlation in individuals with likely pathogenic variants in the CLTC gene. METHODS: We describe 13 individuals with de novo CLTC variants. Causality of variants was determined by using the tolerance landscape of CLTC and computer-assisted molecular modeling where applicable. Phenotypic abnormalities observed in the individuals identified with missense and in-frame variants were compared with those with nonsense or frameshift variants in CLTC. RESULTS: All de novo variants were judged to be causal. Combining our data with that of 14 previously reported affected individuals (n = 27), all had intellectual disability (ID), ranging from mild to moderate/severe, with or without additional neurologic, behavioral, craniofacial, ophthalmologic, and gastrointestinal features. Microcephaly, hypoplasia of the corpus callosum, and epilepsy were more frequently observed in individuals with missense and in-frame variants than in those with nonsense and frameshift variants. However, this difference was not significant. CONCLUSIONS: The wide phenotypic variability associated with likely pathogenic CLTC variants seems to be associated with allelic heterogeneity. The detailed clinical characterization of a larger cohort of individuals with pathogenic CLTC variants is warranted to support the hypothesis that missense and in-frame variants exert a dominant-negative effect, whereas the nonsense and frameshift variants would result in haploinsufficiency.
Published: 2020

34. De novo variants in MED12 cause X-linked syndromic neurodevelopmental disorders in 18 females

Author: Polla, DL, Bhoj, EJ, Verheij, JBGM, Klein Wassink-Ruiter, JS, Reis, A, Deshpande, C, Gregor, A, Hill-Karfe, K, Vulto-van Silfhout, AT, Pfundt, R, Bongers, EMHF, Hakonarson, H, Berland, S, Gradek, G, Banka, S, Chandler, K, Gompertz, L, Huffels, SC, Stumpel, CTRM, Wennekes, R, Stegmann, APA, Reardon, W, Leenders, EKSM, de Vries, BBA, Li D, Zackai, E, Ragge, Nicole, Lynch, SA, Cuddapah, S, van Bokhoven, H, Zweier, C, de Brouwer, APM, Polla, DL, Bhoj, EJ, Verheij, JBGM, Klein Wassink-Ruiter, JS, Reis, A, Deshpande, C, Gregor, A, Hill-Karfe, K, Vulto-van Silfhout, AT, Pfundt, R, Bongers, EMHF, Hakonarson, H, Berland, S, Gradek, G, Banka, S, Chandler, K, Gompertz, L, Huffels, SC, Stumpel, CTRM, Wennekes, R, Stegmann, APA, Reardon, W, Leenders, EKSM, de Vries, BBA, Li D, Zackai, E, Ragge, Nicole, Lynch, SA, Cuddapah, S, van Bokhoven, H, Zweier, C, and de Brouwer, APM
Abstract: Purpose. MED12 is a subunit of the Mediator multiprotein complex with a central role in RNA polymerase II transcription and regulation of cell growth, development, and differentiation. This might underlie the variable phenotypes in males carrying missense variants in MED12, including X-linked recessive Ohdo, Lujan, and FG syndromes. Methods. By international matchmaking we assembled variant and clinical data on 18 females presenting with variable neurodevelopmental disorders (NDDs) and harboring de novo variants in MED12. Results. Five nonsense variants clustered in the C-terminal region, two splice variants were found in the same exon 8 splice acceptor site, and 11 missense variants were distributed over the gene/protein. Protein truncating variants were associated with a severe, syndromic phenotype consisting of intellectual disability (ID), facial dysmorphism, short stature, skeletal abnormalities, feeding difficulties, and variable other abnormalities. De novo missense variants were associated with a less specific, but homogeneous phenotype including severe ID, autistic features, limited speech and variable other anomalies, overlapping both with females with truncating variants as well as males with missense variants. Conclusion. We establish de novo truncating variants in MED12 as causative for a distinct NDD and de novo missense variants as causative for a severe, less specific NDD in females.
Published: 2020

35. A de novo CTNNB1 Novel Splice Variant in an Adult Female with Severe Intellectual Disability

Author: Verhoeven, Willem, Egger, JIM, Jongbloed, RE, van Putten, MM, de Bruijn-van Zandwijk, M, Zwemer, AS, Pfundt, R, Willemsen, MH, Verhoeven, Willem, Egger, JIM, Jongbloed, RE, van Putten, MM, de Bruijn-van Zandwijk, M, Zwemer, AS, Pfundt, R, and Willemsen, MH
Published: 2020

36. Rapid whole exome sequencing in pregnancies to identify the underlying genetic cause in fetuses with congenital anomalies detected by ultrasound imaging

Author: Deden, C, Neveling, K, Zafeiropopoulou, D, Gilissen, C, Pfundt, R, Rinne, T, de Leeuw, N, Faas, B, Gardeitchik, T, Sallevelt, SCEH, Paulussen, A, Stevens, SJC, Sikkel, E, Elting, MW, van Maarle, MC, Diderich, Karin, Corsten-Janssen, N, Lichtenbelt, KD, Lachmeijer, G, Vissers, LELM, Yntema, HG, Nelen, M, Feenstra, I, van Zelst-Stams, W A G, Deden, C, Neveling, K, Zafeiropopoulou, D, Gilissen, C, Pfundt, R, Rinne, T, de Leeuw, N, Faas, B, Gardeitchik, T, Sallevelt, SCEH, Paulussen, A, Stevens, SJC, Sikkel, E, Elting, MW, van Maarle, MC, Diderich, Karin, Corsten-Janssen, N, Lichtenbelt, KD, Lachmeijer, G, Vissers, LELM, Yntema, HG, Nelen, M, Feenstra, I, and van Zelst-Stams, W A G
Published: 2020

37. Loss-of-function mutations in UDP-Glucose 6-Dehydrogenase cause recessive developmental epileptic encephalopathy

Author: Reversade, Bruno, Hengel, H.; Bosso-Lefèvre, C.; Grady, G.; Szenker-Ravi, E.; Li, H.; Pierce, S.; Lebigot, É.; Tan, T.-T.; Eio, M.Y.; Narayanan, G.; Utami, K.H.; Yau, M.; Handal, N.; Deigendesch, W.; Keimer, R.; Marzouqa, H.M.; Gunay-Aygun, M.; Muriello, M.J.; Verhelst, H.; Weckhuysen, S.; Mahida, S.; Naidu, S.; Thomas, T.G.; Lim, J.Y.; Tan, E.S.; Haye, D.; Willemsen, M.A.A.P.; Oegema, R.; Mitchell, W.G.; Pierson, T.M.; Andrews, M.V.; Willing, M.C.; Rodan, L.H.; Barakat, T.S.; van Slegtenhorst, M.; Gavrilova, R.H.; Martinelli, D.; Gilboa, T.; Tamim, A.M.; Hashem, M.O.; AlSayed, M.D.; Abdulrahim, M.M.; Al-Owain, M.; Awaji, A.; Mahmoud, A.A.H.; Faqeih, E.A.; Asmari, A.A.; Algain, S.M.; Jad, L.A.; Aldhalaan, H.M.; Helbig, I.; Koolen, D.A.; Riess, A.; Kraegeloh-Mann, I.; Bauer, P.; Gulsuner, S.; Stamberger, H.; Ng, A.Y.J.; Tang, S.; Tohari, S.; Keren, B.; Schultz-Rogers, L.E.; Klee, E.W.; Barresi, S.; Tartaglia, M.; Mor-Shaked, H.; Maddirevula, S.; Begtrup, A.; Telegrafi, A.; Pfundt, R.; Schüle, R.; Ciruna, B.; Bonnard, C.; Pouladi, M.A.; Stewart, J.C.; Claridge-Chang, A.; Lefeber, D.J.; Alkuraya, F.S.; Mathuru, A.S.; Venkatesh, B.; Barycki, J.J.; Simpson, M.A.; Jamuar, S.S.; Schöls, L, School of Medicine, Reversade, Bruno, Hengel, H.; Bosso-Lefèvre, C.; Grady, G.; Szenker-Ravi, E.; Li, H.; Pierce, S.; Lebigot, É.; Tan, T.-T.; Eio, M.Y.; Narayanan, G.; Utami, K.H.; Yau, M.; Handal, N.; Deigendesch, W.; Keimer, R.; Marzouqa, H.M.; Gunay-Aygun, M.; Muriello, M.J.; Verhelst, H.; Weckhuysen, S.; Mahida, S.; Naidu, S.; Thomas, T.G.; Lim, J.Y.; Tan, E.S.; Haye, D.; Willemsen, M.A.A.P.; Oegema, R.; Mitchell, W.G.; Pierson, T.M.; Andrews, M.V.; Willing, M.C.; Rodan, L.H.; Barakat, T.S.; van Slegtenhorst, M.; Gavrilova, R.H.; Martinelli, D.; Gilboa, T.; Tamim, A.M.; Hashem, M.O.; AlSayed, M.D.; Abdulrahim, M.M.; Al-Owain, M.; Awaji, A.; Mahmoud, A.A.H.; Faqeih, E.A.; Asmari, A.A.; Algain, S.M.; Jad, L.A.; Aldhalaan, H.M.; Helbig, I.; Koolen, D.A.; Riess, A.; Kraegeloh-Mann, I.; Bauer, P.; Gulsuner, S.; Stamberger, H.; Ng, A.Y.J.; Tang, S.; Tohari, S.; Keren, B.; Schultz-Rogers, L.E.; Klee, E.W.; Barresi, S.; Tartaglia, M.; Mor-Shaked, H.; Maddirevula, S.; Begtrup, A.; Telegrafi, A.; Pfundt, R.; Schüle, R.; Ciruna, B.; Bonnard, C.; Pouladi, M.A.; Stewart, J.C.; Claridge-Chang, A.; Lefeber, D.J.; Alkuraya, F.S.; Mathuru, A.S.; Venkatesh, B.; Barycki, J.J.; Simpson, M.A.; Jamuar, S.S.; Schöls, L, and School of Medicine
Abstract: Developmental epileptic encephalopathies are devastating disorders characterized by intractable epileptic seizures and developmental delay. Here, we report an allelic series of germline recessive mutations in UGDH in 36 cases from 25 families presenting with epileptic encephalopathy with developmental delay and hypotonia. UGDH encodes an oxidoreductase that converts UDP-glucose to UDP-glucuronic acid, a key component of specific proteoglycans and glycolipids. Consistent with being loss-of-function alleles, we show using patients’ primary fibroblasts and biochemical assays, that these mutations either impair UGDH stability, oligomerization, or enzymatic activity. In vitro, patient-derived cerebral organoids are smaller with a reduced number of proliferating neuronal progenitors while mutant ugdh zebrafish do not phenocopy the human disease. Our study defines UGDH as a key player for the production of extracellular matrix components that are essential for human brain development. Based on the incidence of variants observed, UGDH mutations are likely to be a frequent cause of recessive epileptic encephalopathy., German Research Foundation (DFG); European Union (European Union); NEUROMICS Network; International Coordination Action (ICA); Fund for Scientific Research Flanders (FWO); Netherlands Organization for Scientific Research (ZONMW VIDI); National Medical Research Council, Singapore; A Strategic Positioning Fund on Genetic Orphan Diseases (GODAFIT); Industry Alignment Fund on Singapore Childhood Undiagnosed Diseases Program (SUREKids); Biomedical Research Council, A*STAR; Diana and Steve Marienhoff Fashion Industries Guild Endowed Fellowship in Pediatric Neuromuscular Diseases; Fondazione Bambino Gesù (Vite Coraggiose); Canadian Institutes of Health Research; Natural Sciences and Engineering Research Council of Canada; Eurocores Program EuroEPINOMICS; University of Antwerp Research Fund; FRAXA Foundation; Brain & Behavior Research Foundation, NARSAD Young Investigator Grant
Published: 2020

38. CTCF variants in 39 individuals with a variable neurodevelopmental disorder broaden the mutational and clinical spectrum

Author: Konrad, E. D. (Enrico D. H.), Nardini, N. (Niels), Caliebe, A. (Almuth), Nagel, I. (Inga), Young, D. (Dana), Horvath, G. (Gabriella), Santoro, S. L. (Stephanie L.), Shuss, C. (Christine), Ziegler, A. (Alban), Bonneau, D. (Dominique), Kempers, M. (Marlies), Pfundt, R. (Rolph), Legius, E. (Eric), Bouman, A. (Arjan), Stuurman, K. E. (Kyra E.), Õunap, K. (Katrin), Pajusalu, S. (Sander), Wojcik, M. H. (Monica H.), Vasileiou, G. (Georgia), Le Guyader, G. (Gwenaël), Schnelle, H. M. (Hege M.), Berland, S. (Siren), Zonneveld-Huijssoon, E. (Evelien), Kersten, S. (Simone), Gupta, A. (Aditi), Blackburn, P. R. (Patrick R.), Ellingson, M. S. (Marissa S.), Ferber, M. J. (Matthew J.), Dhamija, R. (Radhika), Klee, E. W. (Eric W.), McEntagart, M. (Meriel), Lichtenbelt, K. D. (Klaske D.), Kenney, A. (Amy), Vergano, S. A. (Samantha A.), Jamra, R. A. (Rami Abou), Platzer, K. (Konrad), Pierpont, M. E. (Mary Ella), Khattar, D. (Divya), Hopkin, R. J. (Robert J.), Martin, R. J. (Richard J.), Jongmans, M. C. (Marjolijn C. J.), Chang, V. Y. (Vivian Y.), Martinez-Agosto, J. A. (Julian A.), Kuismin, O. (Outi), Kurki, M. I. (Mitja I.), Pietiläinen, O. (Olli), Palotie, A. (Aarno), Maarup, T. J. (Timothy J.), Johnson, D. S. (Diana S.), Venborg Pedersen, K. (Katja), Laulund, L. W. (Lone W.), Lynch, S. A. (Sally A.), Blyth, M. (Moira), Prescott, K. (Katrina), Canham, N. (Natalie), Ibitoye, R. (Rita), Brilstra, E. H. (Eva H.), Shinawi, M. (Marwan), Fassi, E. (Emily), Study, D. (DDD), Sticht, H. (Heinrich), Gregor, A. (Anne), Van Esch, H. (Hilde), and Zweier, C. (Christiane)
Subjects: Drosophila melanogaster, intellectual disability, neurodevelopmental disorders, CTCF, chromatin organization
Abstract: Purpose: Pathogenic variants in the chromatin organizer CTCF were previously reported in seven individuals with a neurodevelopmental disorder (NDD). Methods: Through international collaboration we collected data from 39 subjects with variants in CTCF. We performed transcriptome analysis on RNA from blood samples and utilized Drosophila melanogaster to investigate the impact of Ctcf dosage alteration on nervous system development and function. Results: The individuals in our cohort carried 2 deletions, 8 likely gene-disruptive, 2 splice-site, and 20 different missense variants, most of them de novo. Two cases were familial. The associated phenotype was of variable severity extending from mild developmental delay or normal IQ to severe intellectual disability. Feeding difficulties and behavioral abnormalities were common, and variable other findings including growth restriction and cardiac defects were observed. RNA-sequencing in five individuals identified 3828 deregulated genes enriched for known NDD genes and biological processes such as transcriptional regulation. Ctcf dosage alteration in Drosophila resulted in impaired gross neurological functioning and learning and memory deficits. Conclusion: We significantly broaden the mutational and clinical spectrum ofCTCF-associated NDDs. Our data shed light onto the functional role of CTCF by identifying deregulated genes and show that Ctcf alterations result in nervous system defects in Drosophila.
Published: 2019

39. TNF-α and serum induce SKALP/elafin gene expression in human keratinocytes by a p38 MAP kinase-dependent pathway

Author: Pfundt, R., Wingens, M., Bergers, M., Zweers, M., Frenken, M., and Schalkwijk, J.
Published: 2000
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40. A novel microdeletion syndrome at 3q13.31 characterised by developmental delay, postnatal overgrowth, hypoplastic male genitals, and characteristic facial features

Author: Molin, A-M, Andrieux, J, Koolen, D A, Malan, V, Carella, M, Colleaux, L, Cormier-Daire, V, David, A, de Leeuw, N, Delobel, B, Duban-Bedu, B, Fischetto, R, Flinter, F, Kjaergaard, S, Kok, F, Krepischi, A C, Le Caignec, C, Ogilvie, C Mackie, Maia, S, Mathieu-Dramard, M, Munnich, A, Palumbo, O, Papadia, F, Pfundt, R, Reardon, W, Receveur, A, Rio, M, Ronsbro Darling, L, Rosenberg, C, Sá, J, Vallee, L, Vincent-Delorme, C, Zelante, L, Bondeson, M-L, and Annerén, G
Published: 2012
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41. Identification of clinically significant, submicroscopic chromosome alterations and UPD in fetuses with ultrasound anomalies using genome-wide 250k SNP array analysis

Author: Faas, B H, van der Burgt, I, Kooper, A J, Pfundt, R, Hehir-Kwa, J Y, Smits, A P, and de Leeuw, N
Published: 2010
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42. Skeletal dysplasia with brachytelephalangy in a patient with a congenital disorder of glycosylation due to ALG6 gene mutations

Author: Drijvers, J M, Lefeber, D J, de Munnik, S A, Pfundt, R, van de Leeuw, N, Marcelis, C, Thiel, C, Koerner, C, Wevers, R A, and Morava, E
Published: 2010
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43. Further clinical and molecular delineation of the 9q subtelomeric deletion syndrome supports a major contribution of EHMT1 haploinsufficiency to the core phenotype

Author: Kleefstra, T, van Zelst-Stams, W A, Nillesen, W M, Cormier-Daire, V, Houge, G, Foulds, N, van Dooren, M, Willemsen, M H, Pfundt, R, Turner, A, Wilson, M, McGaughran, J, Rauch, A, Zenker, M, Adam, M P, Innes, M, Davies, C, López, González-Meneses A, Casalone, R, Weber, A, Brueton, L A, Navarro, Delicado A, Bralo, Palomares M, Venselaar, H, Stegmann, S P A, Yntema, H G, van Bokhoven, H, and Brunner, H G
Published: 2009
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44. Further delineation of the 15q13 microdeletion and duplication syndromes: a clinical spectrum varying from non-pathogenic to a severe outcome

Author: van Bon, B W M, Mefford, H C, Menten, B, Koolen, D A, Sharp, A J, Nillesen, W M, Innis, J W, de Ravel, T J L, Mercer, C L, Fichera, M, Stewart, H, Connell, L E, Õunap, K, Lachlan, K, Castle, B, Van der Aa, N, van Ravenswaaij, C, Nobrega, M A, Serra-Juhé, C, Simonic, I, de Leeuw, N, Pfundt, R, Bongers, E M, Baker, C, Finnemore, P, Huang, S, Maloney, V K, Crolla, J A, van Kalmthout, M, Elia, M, Vandeweyer, G, Fryns, J P, Janssens, S, Foulds, N, Reitano, S, Smith, K, Parkel, S, Loeys, B, Woods, C G, Oostra, A, Speleman, F, Pereira, A C, Kurg, A, Willatt, L, Knight, S J L, Vermeesch, J R, Romano, C, Barber, J C, Mortier, G, Pérez-Jurado, L A, Kooy, F, Brunner, H G, Eichler, E E, Kleefstra, T, and de Vries, B B A
Published: 2009
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45. Refining the critical region of the novel 19q13.11 microdeletion syndrome to 750 Kb

Author: Schuurs-Hoeijmakers, J H M, Vermeer, S, van Bon, B W M, Pfundt, R, Marcelis, C, de Brouwer, A P M, de Leeuw, N, and de Vries, Bert B A
Published: 2009
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46. Search for genomic imbalances in a cohort of 24 Cornelia de Lange patients negative for mutations in the NIPBL and SMC1L1 genes

Author: Gervasini, C, Pfundt, R, Castronovo, P, Russo, S, Roversi, G, Masciadri, M, Milani, D, Zampino, G, Selicorni, A, Schoenmakers, EFPM, and Larizza, L
Published: 2008

47. Clinical and molecular delineation of the 17q21.31 microdeletion syndrome

Author: Koolen, D A, Sharp, A J, Hurst, J A, Firth, H V, Knight, S J L, Goldenberg, A, Saugier-Veber, P, Pfundt, R, Vissers, L E L M, Destrée, A, Grisart, B, Rooms, L, Van der Aa, N, Field, M, Hackett, A, Bell, K, Nowaczyk, M J M, Mancini, G M S, Poddighe, P J, Schwartz, C E, Rossi, E, De Gregori, M, Antonacci-Fulton, L L, II, McLellan M D, Garrett, J M, Wiechert, M A, Miner, T L, Crosby, S, Ciccone, R, Willatt, L, Rauch, A, Zenker, M, Aradhya, S, Manning, M A, Strom, T M, Wagenstaller, J, Krepischi-Santos, A C, Vianna-Morgante, A M, Rosenberg, C, Price, S M, Stewart, H, Shaw-Smith, C, Brunner, H G, Wilkie, A O M, Veltman, J A, Zuffardi, O, Eichler, E E, and de Vries, B B A
Published: 2008
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48. Clinical and molecular characteristics of 1qter microdeletion syndrome: delineating a critical region for corpus callosum agenesis/hypogenesis

Author: van Bon, B W M, Koolen, D A, Borgatti, R, Magee, A, Garcia-Minaur, S, Rooms, L, Reardon, W, Zollino, M, Bonaglia, M C, De Gregori, M, Novara, F, Grasso, R, Ciccone, R, van Duyvenvoorde, H A, Aalbers, A M, Guerrini, R, Fazzi, E, Nillesen, W M, McCullough, S, Kant, S G, Marcelis, C L, Pfundt, R, de Leeuw, N, Smeets, D, Sistermans, E A, Wit, J M, Hamel, B C, Brunner, H G, Kooy, F, Zuffardi, O, and de Vries, B B A
Published: 2008
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49. A newly recognised microdeletion syndrome involving 2p15p16.1: narrowing down the critical region by adding another patient detected by genome wide tiling path array comparative genomic hybridisation analysis

Author: de Leeuw, N, Pfundt, R, Koolen, D A, Neefs, I, Scheltinga, I, Mieloo, H, Sistermans, E A, Nillesen, W, Smeets, D F, de Vries, B B A, and Knoers, N V A M
Published: 2008
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50. Identification of novel candidate genes associated with cleft lip and palate using array comparative genomic hybridisation

Author: Osoegawa, K, Vessere, G M, Utami, K H, Mansilla, M A, Johnson, M K, Riley, B M, L’Heureux, J, Pfundt, R, Staaf, J, van der Vliet, W A, Lidral, A C, Schoenmakers, E F P M, Borg, A, Schutte, B C, Lammer, E J, Murray, J C, and de Jong, P J
Published: 2008
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