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1. Novel diagnostic DNA methylation episignatures expand and refine the epigenetic landscapes of Mendelian disorders.

Author

Levy, MA, McConkey, H, Kerkhof, J, Barat-Houari, M, Bargiacchi, S, Biamino, E, Bralo, MP, Cappuccio, G, Ciolfi, A, Clarke, A, DuPont, BR, Elting, MW, Faivre, L, Fee, T, Fletcher, RS, Cherik, F, Foroutan, A, Friez, MJ, Gervasini, C, Haghshenas, S, Hilton, BA, Jenkins, Z, Kaur, S, Lewis, S, Louie, RJ, Maitz, S, Milani, D, Morgan, AT, Oegema, R, Østergaard, E, Pallares, NR, Piccione, M, Pizzi, S, Plomp, AS, Poulton, C, Reilly, J, Relator, R, Rius, R, Robertson, S, Rooney, K, Rousseau, J, Santen, GWE, Santos-Simarro, F, Schijns, J, Squeo, GM, St John, M, Thauvin-Robinet, C, Traficante, G, van der Sluijs, PJ, Vergano, SA, Vos, N, Walden, KK, Azmanov, D, Balci, T, Banka, S, Gecz, J, Henneman, P, Lee, JA, Mannens, MMAM, Roscioli, T, Siu, V, Amor, DJ, Baynam, G, Bend, EG, Boycott, K, Brunetti-Pierri, N, Campeau, PM, Christodoulou, J, Dyment, D, Esber, N, Fahrner, JA, Fleming, MD, Genevieve, D, Kerrnohan, KD, McNeill, A, Menke, LA, Merla, G, Prontera, P, Rockman-Greenberg, C, Schwartz, C, Skinner, SA, Stevenson, RE, Vitobello, A, Tartaglia, M, Alders, M, Tedder, ML, Sadikovic, B, Levy, MA, McConkey, H, Kerkhof, J, Barat-Houari, M, Bargiacchi, S, Biamino, E, Bralo, MP, Cappuccio, G, Ciolfi, A, Clarke, A, DuPont, BR, Elting, MW, Faivre, L, Fee, T, Fletcher, RS, Cherik, F, Foroutan, A, Friez, MJ, Gervasini, C, Haghshenas, S, Hilton, BA, Jenkins, Z, Kaur, S, Lewis, S, Louie, RJ, Maitz, S, Milani, D, Morgan, AT, Oegema, R, Østergaard, E, Pallares, NR, Piccione, M, Pizzi, S, Plomp, AS, Poulton, C, Reilly, J, Relator, R, Rius, R, Robertson, S, Rooney, K, Rousseau, J, Santen, GWE, Santos-Simarro, F, Schijns, J, Squeo, GM, St John, M, Thauvin-Robinet, C, Traficante, G, van der Sluijs, PJ, Vergano, SA, Vos, N, Walden, KK, Azmanov, D, Balci, T, Banka, S, Gecz, J, Henneman, P, Lee, JA, Mannens, MMAM, Roscioli, T, Siu, V, Amor, DJ, Baynam, G, Bend, EG, Boycott, K, Brunetti-Pierri, N, Campeau, PM, Christodoulou, J, Dyment, D, Esber, N, Fahrner, JA, Fleming, MD, Genevieve, D, Kerrnohan, KD, McNeill, A, Menke, LA, Merla, G, Prontera, P, Rockman-Greenberg, C, Schwartz, C, Skinner, SA, Stevenson, RE, Vitobello, A, Tartaglia, M, Alders, M, Tedder, ML, and Sadikovic, B

Abstract

Overlapping clinical phenotypes and an expanding breadth and complexity of genomic associations are a growing challenge in the diagnosis and clinical management of Mendelian disorders. The functional consequences and clinical impacts of genomic variation may involve unique, disorder-specific, genomic DNA methylation episignatures. In this study, we describe 19 novel episignature disorders and compare the findings alongside 38 previously established episignatures for a total of 57 episignatures associated with 65 genetic syndromes. We demonstrate increasing resolution and specificity ranging from protein complex, gene, sub-gene, protein domain, and even single nucleotide-level Mendelian episignatures. We show the power of multiclass modeling to develop highly accurate and disease-specific diagnostic classifiers. This study significantly expands the number and spectrum of disorders with detectable DNA methylation episignatures, improves the clinical diagnostic capabilities through the resolution of unsolved cases and the reclassification of variants of unknown clinical significance, and provides further insight into the molecular etiology of Mendelian conditions.

Published
2022

2. Novel diagnostic DNA methylation episignatures expand and refine the epigenetic landscapes of Mendelian disorders

Author

Levy, MA, McConkey, H, Kerkhof, J, Barat-Houari, M, Bargiacchi, S, Biamino, E, Cappuccio, G, Ciolfi, A, Clarke, A, DuPont, BR, Elting, MW, Faivre, L, Fee, T, Fletcher, RS, Cherik, F, Foroutan, A, Friez, MJ, Gervasini, C, Haghshenas, S, Hilton, BA, Jenkins, Z, Kaur, S, Lewis, S, Louie, RJ, Maitz, S, Milani, D, Morgan, AT, Oegema, R, Ostergaard, E, Pallares, NR, Piccione, M, Pizzi, S, Plomp, AS, Poulton, C, Reilly, J, Relator, R, Rius, R, Robertson, S, Rooney, K, Rousseau, J, Santen, GWE, Santos-Simarro, F, Schijns, J, Squeo, GM, St John, M, Thauvin-Robinet, C, Traficante, G, van der Sluijs, PJ, Vergano, SA, Vos, N, Walden, KK, Azmanov, D, Balci, T, Banka, S, Gecz, J, Henneman, P, Lee, JA, Mannens, MMAM, Roscioli, T, Siu, V, Amor, DJ, Baynam, G, Bend, EG, Boycott, K, Brunetti-Pierri, N, Campeau, PM, Christodoulou, J, Dyment, D, Esber, N, Fahrner, JA, Fleming, MD, Genevieve, D, Kerrnohan, KD, McNeill, A, Menke, LA, Merla, G, Prontera, P, Rockman-Greenberg, C, Schwartz, C, Skinner, SA, Stevenson, RE, Vitobello, A, Tartaglia, M, Alders, M, Tedder, ML, Sadikovic, B, Levy, MA, McConkey, H, Kerkhof, J, Barat-Houari, M, Bargiacchi, S, Biamino, E, Cappuccio, G, Ciolfi, A, Clarke, A, DuPont, BR, Elting, MW, Faivre, L, Fee, T, Fletcher, RS, Cherik, F, Foroutan, A, Friez, MJ, Gervasini, C, Haghshenas, S, Hilton, BA, Jenkins, Z, Kaur, S, Lewis, S, Louie, RJ, Maitz, S, Milani, D, Morgan, AT, Oegema, R, Ostergaard, E, Pallares, NR, Piccione, M, Pizzi, S, Plomp, AS, Poulton, C, Reilly, J, Relator, R, Rius, R, Robertson, S, Rooney, K, Rousseau, J, Santen, GWE, Santos-Simarro, F, Schijns, J, Squeo, GM, St John, M, Thauvin-Robinet, C, Traficante, G, van der Sluijs, PJ, Vergano, SA, Vos, N, Walden, KK, Azmanov, D, Balci, T, Banka, S, Gecz, J, Henneman, P, Lee, JA, Mannens, MMAM, Roscioli, T, Siu, V, Amor, DJ, Baynam, G, Bend, EG, Boycott, K, Brunetti-Pierri, N, Campeau, PM, Christodoulou, J, Dyment, D, Esber, N, Fahrner, JA, Fleming, MD, Genevieve, D, Kerrnohan, KD, McNeill, A, Menke, LA, Merla, G, Prontera, P, Rockman-Greenberg, C, Schwartz, C, Skinner, SA, Stevenson, RE, Vitobello, A, Tartaglia, M, Alders, M, Tedder, ML, and Sadikovic, B

Abstract

Overlapping clinical phenotypes and an expanding breadth and complexity of genomic associations are a growing challenge in the diagnosis and clinical management of Mendelian disorders. The functional consequences and clinical impacts of genomic variation may involve unique, disorder-specific, genomic DNA methylation episignatures. In this study, we describe 19 novel episignature disorders and compare the findings alongside 38 previously established episignatures for a total of 57 episignatures associated with 65 genetic syndromes. We demonstrate increasing resolution and specificity ranging from protein complex, gene, sub-gene, protein domain, and even single nucleotide-level Mendelian episignatures. We show the power of multiclass modeling to develop highly accurate and disease-specific diagnostic classifiers. This study significantly expands the number and spectrum of disorders with detectable DNA methylation episignatures, improves the clinical diagnostic capabilities through the resolution of unsolved cases and the reclassification of variants of unknown clinical significance, and provides further insight into the molecular etiology of Mendelian conditions.

Published
2022

3. An HNRNPK-specific DNA methylation signature makes sense of missense variants and expands the phenotypic spectrum of Au-Kline syndrome

Author

Choufani, S. (Sanaa), McNiven, V. (Vanda), Cytrynbaum, C. (Cheryl), Jangjoo, M. (Maryam), Adam, M. P. (Margaret P.), Bjornsson, H. T. (Hans T.), Harris, J. (Jacqueline), Dyment, D. A. (David A.), Graham, G. E. (Gail E.), Nezarati, M. M. (Marjan M.), Aul, R. B. (Ritu B.), Castiglioni, C. (Claudia), Breckpot, J. (Jeroen), Devriendt, K. (Koen), Stewart, H. (Helen), Banos-Pinero, B. (Benito), Mehta, S. (Sarju), Sandford, R. (Richard), Dunn, C. (Carolyn), Mathevet, R. (Remi), van Maldergem, L. (Lionel), Piard, J. (Juliette), Brischoux-Boucher, E. (Elise), Vitobello, A. (Antonio), Faivre, L. (Laurence), Bournez, M. (Marie), Tran-Mau, F. (Frederic), Maystadt, I. (Isabelle), Fernandez-Jaen, A. (Alberto), Alvarez, S. (Sara), Garcia-Prieto, I. D. (Irene Diez), Alkuraya, F. S. (Fowzan S.), Alsaif, H. S. (Hessa S.), Rahbeeni, Z. (Zuhair), El-Akouri, K. (Karen), Al-Mureikhi, M. (Mariam), Spillmann, R. C. (Rebecca C.), Shashi, V. (Vandana), Sanchez-Lara, P. A. (Pedro A.), Graham, J. M. (John M., Jr.), Roberts, A. (Amy), Chorin, O. (Odelia), Evrony, G. D. (Gilad D.), Kraatari-Tiri, M. (Minna), Dudding-Byth, T. (Tracy), Richardson, A. (Anamaria), Hunt, D. (David), Hamilton, L. (Laura), Dyack, S. (Sarah), Mendelsohn, B. A. (Bryce A.), Rodriguez, N. (Nicolas), Sanchez-Martinez, R. (Rosario), Tenorio-Castano, J. (Jair), Nevado, J. (Julian), Lapunzina, P. (Pablo), Tirado, P. (Pilar), Rodrigues, M. C. (Maria-Teresa Carminho Amaro), Quteineh, L. (Lina), Innes, A. M. (A. Micheil), Kline, A. D. (Antonie D.), Au, P. Y. (P. Y. Billie), Weksberg, R. (Rosanna), Choufani, S. (Sanaa), McNiven, V. (Vanda), Cytrynbaum, C. (Cheryl), Jangjoo, M. (Maryam), Adam, M. P. (Margaret P.), Bjornsson, H. T. (Hans T.), Harris, J. (Jacqueline), Dyment, D. A. (David A.), Graham, G. E. (Gail E.), Nezarati, M. M. (Marjan M.), Aul, R. B. (Ritu B.), Castiglioni, C. (Claudia), Breckpot, J. (Jeroen), Devriendt, K. (Koen), Stewart, H. (Helen), Banos-Pinero, B. (Benito), Mehta, S. (Sarju), Sandford, R. (Richard), Dunn, C. (Carolyn), Mathevet, R. (Remi), van Maldergem, L. (Lionel), Piard, J. (Juliette), Brischoux-Boucher, E. (Elise), Vitobello, A. (Antonio), Faivre, L. (Laurence), Bournez, M. (Marie), Tran-Mau, F. (Frederic), Maystadt, I. (Isabelle), Fernandez-Jaen, A. (Alberto), Alvarez, S. (Sara), Garcia-Prieto, I. D. (Irene Diez), Alkuraya, F. S. (Fowzan S.), Alsaif, H. S. (Hessa S.), Rahbeeni, Z. (Zuhair), El-Akouri, K. (Karen), Al-Mureikhi, M. (Mariam), Spillmann, R. C. (Rebecca C.), Shashi, V. (Vandana), Sanchez-Lara, P. A. (Pedro A.), Graham, J. M. (John M., Jr.), Roberts, A. (Amy), Chorin, O. (Odelia), Evrony, G. D. (Gilad D.), Kraatari-Tiri, M. (Minna), Dudding-Byth, T. (Tracy), Richardson, A. (Anamaria), Hunt, D. (David), Hamilton, L. (Laura), Dyack, S. (Sarah), Mendelsohn, B. A. (Bryce A.), Rodriguez, N. (Nicolas), Sanchez-Martinez, R. (Rosario), Tenorio-Castano, J. (Jair), Nevado, J. (Julian), Lapunzina, P. (Pablo), Tirado, P. (Pilar), Rodrigues, M. C. (Maria-Teresa Carminho Amaro), Quteineh, L. (Lina), Innes, A. M. (A. Micheil), Kline, A. D. (Antonie D.), Au, P. Y. (P. Y. Billie), and Weksberg, R. (Rosanna)

Abstract

Au-Kline syndrome (AKS) is a neurodevelopmental disorder associated with multiple malformations and a characteristic facial gestalt. The first individuals ascertained carried de novo loss-of-function (LoF) variants in HNRNPK. Here, we report 32 individuals with AKS (26 previously unpublished), including 13 with de novo missense variants. We propose new clinical diagnostic criteria for AKS that differentiate it from the clinically overlapping Kabuki syndrome and describe a significant phenotypic expansion to include individuals with missense variants who present with subtle facial features and few or no malformations. Many gene-specific DNA methylation (DNAm) signatures have been identified for neurodevelopmental syndromes. Because HNRNPK has roles in chromatin and epigenetic regulation, we hypothesized that pathogenic variants in HNRNPK may be associated with a specific DNAm signature. Here, we report a unique DNAm signature for AKS due to LoF HNRNPK variants, distinct from controls and Kabuki syndrome. This DNAm signature is also identified in some individuals with de novo HNRNPK missense variants, confirming their pathogenicity and the phenotypic expansion of AKS to include more subtle phenotypes. Furthermore, we report that some individuals with missense variants have an “intermediate” DNAm signature that parallels their milder clinical presentation, suggesting the presence of an epi-genotype phenotype correlation. In summary, the AKS DNAm signature may help elucidate the underlying pathophysiology of AKS. This DNAm signature also effectively supported clinical syndrome delineation and is a valuable aid for variant interpretation in individuals where a clinical diagnosis of AKS is unclear, particularly for mild presentations.

Published
2022

4. Alternative genomic diagnoses for individuals with a clinical diagnosis of Dubowitz syndrome

Author

Dyment, D. A. (David A.), O'Donnell-Luria, A. (Anne), Agrawal, P. B. (Pankaj B.), Coban Akdemir, Z. (Zeynep), Aleck, K. A. (Kyrieckos A.), Antaki, D. (Danny), Al Sharhan, H. (Hind), Au, P. B. (Ping-Yee B.), Aydin, H. (Hatip), Beggs, A. H. (Alan H.), Bilguvar, K. (Kaya), Boerwinkle, E. (Eric), Brand, H. (Harrison), Brownstein, C. A. (Catherine A.), Buyske, S. (Steve), Chodirker, B. (Bernard), Choi, J. (Jungmin), Chudley, A. E. (Albert E.), Clericuzio, C. L. (Carol L.), Cox, G. F. (Gerald F.), Curry, C. (Cynthia), De Boer, E. (Elke), De Vries, B. B. (Bert B. A.), Dunn, K. (Kathryn), Dutmer, C. M. (Cullen M.), England, E. M. (Eleina M.), Fahrner, J. A. (Jill A.), Geckinli, B. B. (Bilgen B.), Genetti, C. A. (Casie A.), Gezdirici, A. (Alper), Gibson, W. T. (William T.), Gleeson, J. G. (Joseph G.), Greenberg, C. R. (Cheryl R.), Hall, A. (April), Hamosh, A. (Ada), Hartley, T. (Taila), Jhangiani, S. N. (Shalini N.), Karaca, E. (Ender), Kernohan, K. (Kristin), Lauzon, J. L. (Julie L.), Lewis, M. E. (M. E. Suzanne), Lowry, R. B. (R. Brian), López-Giráldez, F. (Francesc), Matise, T. C. (Tara C.), McEvoy-Venneri, J. (Jennifer), McInnes, B. (Brenda), Mhanni, A. (Aziz), Garcia Minaur, S. (Sixto), Moilanen, J. (Jukka), Nguyen, A. (An), Nowaczyk, M. J. (Malgorzata J. M.), Posey, J. E. (Jennifer E.), Õunap, K. (Katrin), Pehlivan, D. (Davut), Pajusalu, S. (Sander), Penney, L. S. (Lynette S.), Poterba, T. (Timothy), Prontera, P. (Paolo), Rodovalho Doriqui, M. J. (Maria Juliana), Sawyer, S. L. (Sarah L.), Sobreira, N. (Nara), Stanley, V. (Valentina), Torun, D. (Deniz), Wargowski, D. (David), Witmer, P. D. (P. Dane), Wong, I. (Isaac), Xing, J. (Jinchuan), Zaki, M. S. (Maha S.), Zhang, Y. (Yeting), C. C. (Care4Rare Consortium), C. F. (Centers For Mendelian Genomics), Boycott, K. M. (Kym M.), Bamshad, M. J. (Michael J.), Nickerson, D. A. (Deborah A.), Blue, E. E. (Elizabeth E.), Innes, A. M. (A. Micheil), Dyment, D. A. (David A.), O'Donnell-Luria, A. (Anne), Agrawal, P. B. (Pankaj B.), Coban Akdemir, Z. (Zeynep), Aleck, K. A. (Kyrieckos A.), Antaki, D. (Danny), Al Sharhan, H. (Hind), Au, P. B. (Ping-Yee B.), Aydin, H. (Hatip), Beggs, A. H. (Alan H.), Bilguvar, K. (Kaya), Boerwinkle, E. (Eric), Brand, H. (Harrison), Brownstein, C. A. (Catherine A.), Buyske, S. (Steve), Chodirker, B. (Bernard), Choi, J. (Jungmin), Chudley, A. E. (Albert E.), Clericuzio, C. L. (Carol L.), Cox, G. F. (Gerald F.), Curry, C. (Cynthia), De Boer, E. (Elke), De Vries, B. B. (Bert B. A.), Dunn, K. (Kathryn), Dutmer, C. M. (Cullen M.), England, E. M. (Eleina M.), Fahrner, J. A. (Jill A.), Geckinli, B. B. (Bilgen B.), Genetti, C. A. (Casie A.), Gezdirici, A. (Alper), Gibson, W. T. (William T.), Gleeson, J. G. (Joseph G.), Greenberg, C. R. (Cheryl R.), Hall, A. (April), Hamosh, A. (Ada), Hartley, T. (Taila), Jhangiani, S. N. (Shalini N.), Karaca, E. (Ender), Kernohan, K. (Kristin), Lauzon, J. L. (Julie L.), Lewis, M. E. (M. E. Suzanne), Lowry, R. B. (R. Brian), López-Giráldez, F. (Francesc), Matise, T. C. (Tara C.), McEvoy-Venneri, J. (Jennifer), McInnes, B. (Brenda), Mhanni, A. (Aziz), Garcia Minaur, S. (Sixto), Moilanen, J. (Jukka), Nguyen, A. (An), Nowaczyk, M. J. (Malgorzata J. M.), Posey, J. E. (Jennifer E.), Õunap, K. (Katrin), Pehlivan, D. (Davut), Pajusalu, S. (Sander), Penney, L. S. (Lynette S.), Poterba, T. (Timothy), Prontera, P. (Paolo), Rodovalho Doriqui, M. J. (Maria Juliana), Sawyer, S. L. (Sarah L.), Sobreira, N. (Nara), Stanley, V. (Valentina), Torun, D. (Deniz), Wargowski, D. (David), Witmer, P. D. (P. Dane), Wong, I. (Isaac), Xing, J. (Jinchuan), Zaki, M. S. (Maha S.), Zhang, Y. (Yeting), C. C. (Care4Rare Consortium), C. F. (Centers For Mendelian Genomics), Boycott, K. M. (Kym M.), Bamshad, M. J. (Michael J.), Nickerson, D. A. (Deborah A.), Blue, E. E. (Elizabeth E.), and Innes, A. M. (A. Micheil)

Abstract

Dubowitz syndrome (DubS) is considered a recognizable syndrome characterized by a distinctive facial appearance and deficits in growth and development. There have been over 200 individuals reported with Dubowitz or a “Dubowitz-like” condition, although no single gene has been implicated as responsible for its cause. We have performed exome (ES) or genome sequencing (GS) for 31 individuals clinically diagnosed with DubS. After genome-wide sequencing, rare variant filtering and computational and Mendelian genomic analyses, a presumptive molecular diagnosis was made in 13/27 (48%) families. The molecular diagnoses included biallelic variants in SKIV2L, SLC35C1, BRCA1, NSUN2; de novo variants in ARID1B, ARID1A, CREBBP, POGZ, TAF1, HDAC8, and copy-number variation at1p36.11(ARID1A), 8q22.2(VPS13B), Xp22, and Xq13(HDAC8). Variants of unknown significance in known disease genes, and also in genes of uncertain significance, were observed in 7/27 (26%) additional families. Only one gene, HDAC8, could explain the phenotype in more than one family (N = 2). All but two of the genomic diagnoses were for genes discovered, or for conditions recognized, since the introduction of next-generation sequencing. Overall, the DubS-like clinical phenotype is associated with extensive locus heterogeneity and the molecular diagnoses made are for emerging clinical conditions sharing characteristic features that overlap the DubS phenotype.

Published
2021

5. AMPA receptor GluA2 subunit defects are a cause of neurodevelopmental disorders

Author

Salpietro, V, Dixon, CL, Guo, H, Bello, OD, Vandrovcova, J, Efthymiou, S, Maroofian, R, Heimer, G, Burglen, L, Valence, S, Torti, E, Hacke, M, Rankin, J, Tariq, H, Colin, E, Procaccio, V, Striano, P, Mankad, K, Lieb, A, Chen, S, Pisani, L, Bettencourt, C, Mannikko, R, Manole, A, Brusco, A, Grosso, E, Ferrero, GB, Armstrong-Moron, J, Gueden, S, Bar-Yosef, O, Tzadok, M, Monaghan, KG, Santiago-Sim, T, Person, RE, Cho, MT, Willaert, R, Yoo, Y, Chae, J-H, Quan, Y, Wu, H, Wang, T, Bernier, RA, Xia, K, Blesson, A, Jain, M, Motazacker, MM, Jaeger, B, Schneider, AL, Boysen, K, Muir, AM, Myers, CT, Gavrilova, RH, Gunderson, L, Schultz-Rogers, L, Klee, EW, Dyment, D, Osmond, M, Parellada, M, Llorente, C, Gonzalez-Penas, J, Carracedo, A, Van Haeringen, A, Ruivenkamp, C, Nava, C, Heron, D, Nardello, R, Iacomino, M, Minetti, C, Skabar, A, Fabretto, A, Chez, M, Tsai, A, Fassi, E, Shinawi, M, Constantino, JN, De Zorzi, R, Fortuna, S, Kok, F, Keren, B, Bonneau, D, Choi, M, Benzeev, B, Zara, F, Mefford, HC, Scheffer, IE, Clayton-Smith, J, Macaya, A, Rothman, JE, Eichler, EE, Kullmann, DM, Houlden, H, Raspall-Chaure, M, Hanna, MG, Bugiardini, E, Hostettler, I, O'Callaghan, B, Khan, A, Cortese, A, O'Connor, E, Yau, WY, Bourinaris, T, Kaiyrzhanov, R, Chelban, V, Madej, M, Diana, MC, Vari, MS, Pedemonte, M, Bruno, C, Balagura, G, Scala, M, Fiorillo, C, Nobili, L, Malintan, NT, Zanetti, MN, Krishnakumar, SS, Lignani, G, Jepson, JEC, Broda, P, Baldassari, S, Rossi, P, Fruscione, F, Madia, F, Traverso, M, De-Marco, P, Perez-Duenas, B, Munell, F, Kriouile, Y, El-Khorassani, M, Karashova, B, Avdjieva, D, Kathom, H, Tincheva, R, Van-Maldergem, L, Nachbauer, W, Boesch, S, Gagliano, A, Amadori, E, Goraya, JS, Sultan, T, Kirmani, S, Ibrahim, S, Jan, F, Mine, J, Banu, S, Veggiotti, P, Zuccotti, G, Ferrari, MD, Van Den Maagdenberg, AMJ, Verrotti, A, Marseglia, GL, Savasta, S, Soler, MA, Scuderi, C, Borgione, E, Chimenz, R, Gitto, E, Dipasquale, V, Sallemi, A, Fusco, M, Cuppari, C, Cutrupi, MC, Ruggieri, M, Cama, A, Capra, V, Mencacci, NE, Boles, R, Gupta, N, Kabra, M, Papacostas, S, Zamba-Papanicolaou, E, Dardiotis, E, Maqbool, S, Rana, N, Atawneh, O, Lim, SY, Shaikh, F, Koutsis, G, Breza, M, Coviello, DA, Dauvilliers, YA, AlKhawaja, I, AlKhawaja, M, Al-Mutairi, F, Stojkovic, T, Ferrucci, V, Zollo, M, Alkuraya, FS, Kinali, M, Sherifa, H, Benrhouma, H, Turki, IBY, Tazir, M, Obeid, M, Bakhtadze, S, Saadi, NW, Zaki, MS, Triki, CC, Benfenati, F, Gustincich, S, Kara, M, Belcastro, V, Specchio, N, Capovilla, G, Karimiani, EG, Salih, AM, Okubadejo, NU, Ojo, OO, Oshinaike, OO, Oguntunde, O, Wahab, K, Bello, AH, Abubakar, S, Obiabo, Y, Nwazor, E, Ekenze, O, Williams, U, Iyagba, A, Taiwo, L, Komolafe, M, Senkevich, K, Shashkin, C, Zharkynbekova, N, Koneyev, K, Manizha, G, Isrofilov, M, Guliyeva, U, Salayev, K, Khachatryan, S, Rossi, S, Silvestri, G, Haridy, N, Ramenghi, LA, Xiromerisiou, G, David, E, Aguennouz, M, Fidani, L, Spanaki, C, Tucci, A, Salpietro, V, Dixon, CL, Guo, H, Bello, OD, Vandrovcova, J, Efthymiou, S, Maroofian, R, Heimer, G, Burglen, L, Valence, S, Torti, E, Hacke, M, Rankin, J, Tariq, H, Colin, E, Procaccio, V, Striano, P, Mankad, K, Lieb, A, Chen, S, Pisani, L, Bettencourt, C, Mannikko, R, Manole, A, Brusco, A, Grosso, E, Ferrero, GB, Armstrong-Moron, J, Gueden, S, Bar-Yosef, O, Tzadok, M, Monaghan, KG, Santiago-Sim, T, Person, RE, Cho, MT, Willaert, R, Yoo, Y, Chae, J-H, Quan, Y, Wu, H, Wang, T, Bernier, RA, Xia, K, Blesson, A, Jain, M, Motazacker, MM, Jaeger, B, Schneider, AL, Boysen, K, Muir, AM, Myers, CT, Gavrilova, RH, Gunderson, L, Schultz-Rogers, L, Klee, EW, Dyment, D, Osmond, M, Parellada, M, Llorente, C, Gonzalez-Penas, J, Carracedo, A, Van Haeringen, A, Ruivenkamp, C, Nava, C, Heron, D, Nardello, R, Iacomino, M, Minetti, C, Skabar, A, Fabretto, A, Chez, M, Tsai, A, Fassi, E, Shinawi, M, Constantino, JN, De Zorzi, R, Fortuna, S, Kok, F, Keren, B, Bonneau, D, Choi, M, Benzeev, B, Zara, F, Mefford, HC, Scheffer, IE, Clayton-Smith, J, Macaya, A, Rothman, JE, Eichler, EE, Kullmann, DM, Houlden, H, Raspall-Chaure, M, Hanna, MG, Bugiardini, E, Hostettler, I, O'Callaghan, B, Khan, A, Cortese, A, O'Connor, E, Yau, WY, Bourinaris, T, Kaiyrzhanov, R, Chelban, V, Madej, M, Diana, MC, Vari, MS, Pedemonte, M, Bruno, C, Balagura, G, Scala, M, Fiorillo, C, Nobili, L, Malintan, NT, Zanetti, MN, Krishnakumar, SS, Lignani, G, Jepson, JEC, Broda, P, Baldassari, S, Rossi, P, Fruscione, F, Madia, F, Traverso, M, De-Marco, P, Perez-Duenas, B, Munell, F, Kriouile, Y, El-Khorassani, M, Karashova, B, Avdjieva, D, Kathom, H, Tincheva, R, Van-Maldergem, L, Nachbauer, W, Boesch, S, Gagliano, A, Amadori, E, Goraya, JS, Sultan, T, Kirmani, S, Ibrahim, S, Jan, F, Mine, J, Banu, S, Veggiotti, P, Zuccotti, G, Ferrari, MD, Van Den Maagdenberg, AMJ, Verrotti, A, Marseglia, GL, Savasta, S, Soler, MA, Scuderi, C, Borgione, E, Chimenz, R, Gitto, E, Dipasquale, V, Sallemi, A, Fusco, M, Cuppari, C, Cutrupi, MC, Ruggieri, M, Cama, A, Capra, V, Mencacci, NE, Boles, R, Gupta, N, Kabra, M, Papacostas, S, Zamba-Papanicolaou, E, Dardiotis, E, Maqbool, S, Rana, N, Atawneh, O, Lim, SY, Shaikh, F, Koutsis, G, Breza, M, Coviello, DA, Dauvilliers, YA, AlKhawaja, I, AlKhawaja, M, Al-Mutairi, F, Stojkovic, T, Ferrucci, V, Zollo, M, Alkuraya, FS, Kinali, M, Sherifa, H, Benrhouma, H, Turki, IBY, Tazir, M, Obeid, M, Bakhtadze, S, Saadi, NW, Zaki, MS, Triki, CC, Benfenati, F, Gustincich, S, Kara, M, Belcastro, V, Specchio, N, Capovilla, G, Karimiani, EG, Salih, AM, Okubadejo, NU, Ojo, OO, Oshinaike, OO, Oguntunde, O, Wahab, K, Bello, AH, Abubakar, S, Obiabo, Y, Nwazor, E, Ekenze, O, Williams, U, Iyagba, A, Taiwo, L, Komolafe, M, Senkevich, K, Shashkin, C, Zharkynbekova, N, Koneyev, K, Manizha, G, Isrofilov, M, Guliyeva, U, Salayev, K, Khachatryan, S, Rossi, S, Silvestri, G, Haridy, N, Ramenghi, LA, Xiromerisiou, G, David, E, Aguennouz, M, Fidani, L, Spanaki, C, and Tucci, A

Abstract

AMPA receptors (AMPARs) are tetrameric ligand-gated channels made up of combinations of GluA1-4 subunits encoded by GRIA1-4 genes. GluA2 has an especially important role because, following post-transcriptional editing at the Q607 site, it renders heteromultimeric AMPARs Ca2+-impermeable, with a linear relationship between current and trans-membrane voltage. Here, we report heterozygous de novo GRIA2 mutations in 28 unrelated patients with intellectual disability (ID) and neurodevelopmental abnormalities including autism spectrum disorder (ASD), Rett syndrome-like features, and seizures or developmental epileptic encephalopathy (DEE). In functional expression studies, mutations lead to a decrease in agonist-evoked current mediated by mutant subunits compared to wild-type channels. When GluA2 subunits are co-expressed with GluA1, most GRIA2 mutations cause a decreased current amplitude and some also affect voltage rectification. Our results show that de-novo variants in GRIA2 can cause neurodevelopmental disorders, complementing evidence that other genetic causes of ID, ASD and DEE also disrupt glutamatergic synaptic transmission.

Published
2019

6. Severe connective tissue laxity including aortic dilatation in Sotos syndrome.

Author

Hood R.L., Boycott K.M., Stark Z., Boycott K., Roberston S.P., MacKenzie A., Majewski J., Brudno M., Dyment D., Hunter M.F., Bulman D.E., Mcgillivray G., Hood R.L., Boycott K.M., Stark Z., Boycott K., Roberston S.P., MacKenzie A., Majewski J., Brudno M., Dyment D., Hunter M.F., Bulman D.E., and Mcgillivray G.

Published
2016

7. Severe connective tissue laxity including aortic dilatation in Sotos syndrome.

Author

Hood R.L., Boycott K.M., Stark Z., Boycott K., Roberston S.P., MacKenzie A., Majewski J., Brudno M., Dyment D., Hunter M.F., Bulman D.E., Mcgillivray G., Hood R.L., Boycott K.M., Stark Z., Boycott K., Roberston S.P., MacKenzie A., Majewski J., Brudno M., Dyment D., Hunter M.F., Bulman D.E., and Mcgillivray G.

Published
2016

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