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2. Heterozygous variants in PRPF8 are associated with neurodevelopmental disorders

Author

O'Grady, L., Vergano, Samantha A., Hoffman, T.L., Sarco, D., Cherny, S., Bryant, E., Schultz-Rogers, L., Chung, W.K., Sacharow, S., Immken, L.L., Holder, S., Blackwell, R.R., Buchanan, C., Yusupov, R., Lecoquierre, F., Guerrot, A.M., Rodan, L., Vries, B.B.A. de, Kamsteeg, E.J., Simarro, F. Santos, Palomares-Bralo, M., Brown, N., Pais, L., Ferrer, A., Klee, E.W., Babovic-Vuksanovic, D., Rhodes, L., Person, R., Begtrup, A., Keller-Ramey, J., Santiago-Sim, T., Schnur, R.E., Sweetser, D.A., Gold, N.B., O'Grady, L., Vergano, Samantha A., Hoffman, T.L., Sarco, D., Cherny, S., Bryant, E., Schultz-Rogers, L., Chung, W.K., Sacharow, S., Immken, L.L., Holder, S., Blackwell, R.R., Buchanan, C., Yusupov, R., Lecoquierre, F., Guerrot, A.M., Rodan, L., Vries, B.B.A. de, Kamsteeg, E.J., Simarro, F. Santos, Palomares-Bralo, M., Brown, N., Pais, L., Ferrer, A., Klee, E.W., Babovic-Vuksanovic, D., Rhodes, L., Person, R., Begtrup, A., Keller-Ramey, J., Santiago-Sim, T., Schnur, R.E., Sweetser, D.A., and Gold, N.B.

Abstract

Item does not contain fulltext, The pre-mRNA-processing factor 8, encoded by PRPF8, is a scaffolding component of a spliceosome complex involved in the removal of introns from mRNA precursors. Previously, heterozygous pathogenic variants in PRPF8 have been associated with autosomal dominant retinitis pigmentosa. More recently, PRPF8 was suggested as a candidate gene for autism spectrum disorder due to the enrichment of sequence variants in this gene in individuals with neurodevelopmental disorders. We report 14 individuals with various forms of neurodevelopmental conditions, found to have heterozygous, predominantly de novo, missense, and loss-of-function variants in PRPF8. These individuals have clinical features that may represent a new neurodevelopmental syndrome.

Published
2022

3. SPEN haploinsufficiency causes a neurodevelopmental disorder overlapping proximal 1p36 deletion syndrome with an episignature of X chromosomes in females

Author

Radio, F.C., Pang, K., Ciolfi, A., Levy, M.A., Hernández-García, A., Pedace, L., Pantaleoni, F., Liu, Z, Boer, E. de, Jackson, A., Bruselles, A., McConkey, H., Stellacci, E., Cicero, S. Lo, Motta, M., Carrozzo, R., Dentici, M.L., McWalter, K., Desai, M., Monaghan, K.G., Telegrafi, A., Philippe, C., Vitobello, A., Au, M., Grand, K., Sanchez-Lara, P.A., Baez, J., Lindstrom, K., Kulch, P., Sebastian, J., Madan-Khetarpal, S., Roadhouse, C., MacKenzie, J.J., Monteleone, B., Saunders, C.J., Cuevas, J.K. Jean, Cross, L., Zhou, D., Hartley, T., Sawyer, S.L., Monteiro, F.P., Secches, T.V., Kok, F., Schultz-Rogers, L.E., Macke, E.L., Morava, E., Klee, E.W., Kemppainen, J., Iascone, M., Selicorni, A., Tenconi, R., Amor, D.J., Pais, L., Gallacher, L., Turnpenny, P.D., Stals, K., Ellard, S., Cabet, S., Lesca, G., Pascal, J., Steindl, K., Ravid, S., Weiss, K., Castle, A.M.R., Carter, M.T., Kalsner, L., Vries, B.B.A. de, Bon, B.W. van, Wevers, M.R., Pfundt, R.P., Stegmann, A.P.A., Kerr, B., Kingston, H.M., Chandler, K.E., Sheehan, W., Elias, A.F., Shinde, D.N., Towne, M.C., Robin, N.H., Goodloe, D., Vanderver, A., Sherbini, O., Bluske, K., Hagelstrom, R.T., Zanus, C., Faletra, F., Musante, L., Kurtz-Nelson, E.C., Earl, R.K., Anderlid, B.M., Morin, G., Slegtenhorst, M. van, Diderich, K.E.M., Brooks, A.S., Gribnau, J., Boers, R.G., Finestra, T.R., Carter, L.B., Rauch, A., Gasparini, P., Vissers, L.E.L.M., Lloyd Holder, J., Tartaglia, M., Radio, F.C., Pang, K., Ciolfi, A., Levy, M.A., Hernández-García, A., Pedace, L., Pantaleoni, F., Liu, Z, Boer, E. de, Jackson, A., Bruselles, A., McConkey, H., Stellacci, E., Cicero, S. Lo, Motta, M., Carrozzo, R., Dentici, M.L., McWalter, K., Desai, M., Monaghan, K.G., Telegrafi, A., Philippe, C., Vitobello, A., Au, M., Grand, K., Sanchez-Lara, P.A., Baez, J., Lindstrom, K., Kulch, P., Sebastian, J., Madan-Khetarpal, S., Roadhouse, C., MacKenzie, J.J., Monteleone, B., Saunders, C.J., Cuevas, J.K. Jean, Cross, L., Zhou, D., Hartley, T., Sawyer, S.L., Monteiro, F.P., Secches, T.V., Kok, F., Schultz-Rogers, L.E., Macke, E.L., Morava, E., Klee, E.W., Kemppainen, J., Iascone, M., Selicorni, A., Tenconi, R., Amor, D.J., Pais, L., Gallacher, L., Turnpenny, P.D., Stals, K., Ellard, S., Cabet, S., Lesca, G., Pascal, J., Steindl, K., Ravid, S., Weiss, K., Castle, A.M.R., Carter, M.T., Kalsner, L., Vries, B.B.A. de, Bon, B.W. van, Wevers, M.R., Pfundt, R.P., Stegmann, A.P.A., Kerr, B., Kingston, H.M., Chandler, K.E., Sheehan, W., Elias, A.F., Shinde, D.N., Towne, M.C., Robin, N.H., Goodloe, D., Vanderver, A., Sherbini, O., Bluske, K., Hagelstrom, R.T., Zanus, C., Faletra, F., Musante, L., Kurtz-Nelson, E.C., Earl, R.K., Anderlid, B.M., Morin, G., Slegtenhorst, M. van, Diderich, K.E.M., Brooks, A.S., Gribnau, J., Boers, R.G., Finestra, T.R., Carter, L.B., Rauch, A., Gasparini, P., Vissers, L.E.L.M., Lloyd Holder, J., and Tartaglia, M.

Abstract

Contains fulltext : 231702.pdf (Publisher’s version ) (Closed access), Deletion 1p36 (del1p36) syndrome is the most common human disorder resulting from a terminal autosomal deletion. This condition is molecularly and clinically heterogeneous. Deletions involving two non-overlapping regions, known as the distal (telomeric) and proximal (centromeric) critical regions, are sufficient to cause the majority of the recurrent clinical features, although with different facial features and dysmorphisms. SPEN encodes a transcriptional repressor commonly deleted in proximal del1p36 syndrome and is located centromeric to the proximal 1p36 critical region. Here, we used clinical data from 34 individuals with truncating variants in SPEN to define a neurodevelopmental disorder presenting with features that overlap considerably with those of proximal del1p36 syndrome. The clinical profile of this disease includes developmental delay/intellectual disability, autism spectrum disorder, anxiety, aggressive behavior, attention deficit disorder, hypotonia, brain and spine anomalies, congenital heart defects, high/narrow palate, facial dysmorphisms, and obesity/increased BMI, especially in females. SPEN also emerges as a relevant gene for del1p36 syndrome by co-expression analyses. Finally, we show that haploinsufficiency of SPEN is associated with a distinctive DNA methylation episignature of the X chromosome in affected females, providing further evidence of a specific contribution of the protein to the epigenetic control of this chromosome, and a paradigm of an X chromosome-specific episignature that classifies syndromic traits. We conclude that SPEN is required for multiple developmental processes and SPEN haploinsufficiency is a major contributor to a disorder associated with deletions centromeric to the previously established 1p36 critical regions.

Published
2021

4. NEXMIF encephalopathy: an X-linked disorder with male and female phenotypic patterns

Author

Stamberger, H., Hammer, T.B., Gardella, E., Vlaskamp, D.R.M., Bertelsen, B., Mandelstam, S., Lange, I. de, Zhang, J., Myers, C.T., Fenger, C., Afawi, Z., Fuerte, E.P. Almanza, Andrade, D.M., Balcik, Y., Zeev, B. Ben, Bennett, M.F., Berkovic, S.F., Isidor, B., Bouman, A., Brilstra, E., Ø, L. Busk, Cairns, A., Caumes, R., Chatron, N., Dale, R.C., Geus, C. de, Edery, P., Gill, D., Granild-Jensen, J.B., Gunderson, L., Gunning, B., Heimer, G., Helle, J.R., Hildebrand, M.S., Hollingsworth, G., Kharytonov, V., Klee, E.W., Koeleman, B.P.C., Koolen, D.A., Korff, C., Küry, S., Lesca, G., Lev, D., Leventer, R.J., Mackay, M.T., Macke, E.L., McEntagart, M., Mohammad, S.S., Monin, P., Montomoli, M., Morava, E., Moutton, S., Muir, A.M., Parrini, E., Procopis, P., Ranza, E., Reed, L., Reif, P.S., Rosenow, F., Rossi, M., Sadleir, L.G., Sadoway, T., Schelhaas, H.J., Schneider, A.L., Shah, K., Shalev, R., Sisodiya, S.M., Smol, T., Stumpel, C., Stuurman, K., Symonds, J.D., Mau-Them, F.T., Verbeek, N., Verhoeven, J.S., Wallace, G., Yosovich, K., Zarate, Y.A., Zerem, A., Zuberi, S.M., Guerrini, R., Mefford, H.C., Patel, C., Zhang, Y.H., Møller, R.S., Scheffer, I.E., Stamberger, H., Hammer, T.B., Gardella, E., Vlaskamp, D.R.M., Bertelsen, B., Mandelstam, S., Lange, I. de, Zhang, J., Myers, C.T., Fenger, C., Afawi, Z., Fuerte, E.P. Almanza, Andrade, D.M., Balcik, Y., Zeev, B. Ben, Bennett, M.F., Berkovic, S.F., Isidor, B., Bouman, A., Brilstra, E., Ø, L. Busk, Cairns, A., Caumes, R., Chatron, N., Dale, R.C., Geus, C. de, Edery, P., Gill, D., Granild-Jensen, J.B., Gunderson, L., Gunning, B., Heimer, G., Helle, J.R., Hildebrand, M.S., Hollingsworth, G., Kharytonov, V., Klee, E.W., Koeleman, B.P.C., Koolen, D.A., Korff, C., Küry, S., Lesca, G., Lev, D., Leventer, R.J., Mackay, M.T., Macke, E.L., McEntagart, M., Mohammad, S.S., Monin, P., Montomoli, M., Morava, E., Moutton, S., Muir, A.M., Parrini, E., Procopis, P., Ranza, E., Reed, L., Reif, P.S., Rosenow, F., Rossi, M., Sadleir, L.G., Sadoway, T., Schelhaas, H.J., Schneider, A.L., Shah, K., Shalev, R., Sisodiya, S.M., Smol, T., Stumpel, C., Stuurman, K., Symonds, J.D., Mau-Them, F.T., Verbeek, N., Verhoeven, J.S., Wallace, G., Yosovich, K., Zarate, Y.A., Zerem, A., Zuberi, S.M., Guerrini, R., Mefford, H.C., Patel, C., Zhang, Y.H., Møller, R.S., and Scheffer, I.E.

Abstract

Contains fulltext : 231688.pdf (Publisher’s version ) (Closed access), PURPOSE: Pathogenic variants in the X-linked gene NEXMIF (previously KIAA2022) are associated with intellectual disability (ID), autism spectrum disorder, and epilepsy. We aimed to delineate the female and male phenotypic spectrum of NEXMIF encephalopathy. METHODS: Through an international collaboration, we analyzed the phenotypes and genotypes of 87 patients with NEXMIF encephalopathy. RESULTS: Sixty-three females and 24 males (46 new patients) with NEXMIF encephalopathy were studied, with 30 novel variants. Phenotypic features included developmental delay/ID in 86/87 (99%), seizures in 71/86 (83%) and multiple comorbidities. Generalized seizures predominated including myoclonic seizures and absence seizures (both 46/70, 66%), absence with eyelid myoclonia (17/70, 24%), and atonic seizures (30/70, 43%). Males had more severe developmental impairment; females had epilepsy more frequently, and varied from unaffected to severely affected. All NEXMIF pathogenic variants led to a premature stop codon or were deleterious structural variants. Most arose de novo, although X-linked segregation occurred for both sexes. Somatic mosaicism occurred in two males and a family with suspected parental mosaicism. CONCLUSION: NEXMIF encephalopathy is an X-linked, generalized developmental and epileptic encephalopathy characterized by myoclonic-atonic epilepsy overlapping with eyelid myoclonia with absence. Some patients have developmental encephalopathy without epilepsy. Males have more severe developmental impairment. NEXMIF encephalopathy arises due to loss-of-function variants.

Published
2021

5. Truncating SRCAP variants outside the Floating-Harbor syndrome locus cause a distinct neurodevelopmental disorder with a specific DNA methylation signature

Author

Rots, D., Chater-Diehl, E., Dingemans, A.J.M., Goodman, S.J., Siu, M.T., Cytrynbaum, C., Choufani, S., Hoang, N., Walker, S., Awamleh, Z., Charkow, J., Meyn, S., Pfundt, R.P., Rinne, T.K., Gardeitchik, T., Vries, B.B.A. de, Deden, A.C., Leenders, E.K.S.M., Kwint, M.P., Stumpel, C., Stevens, S.J.C., Vermeulen, J.R., Harssel, J.V.T. van, Bosch, D.G.M., Gassen, K.L.I. van, Binsbergen, E. van, Geus, C.M. de, Brackel, H., Hempel, M., Lessel, D., Denecke, J., Slavotinek, A., Strober, J., Crunk, A., Folk, L., Wentzensen, I.M., Yang, H., Zou, F., Millan, F., Person, R., Xie, Y., Liu, S., Ousager, L.B., Larsen, M., Schultz-Rogers, L., Morava, E., Klee, E.W., Berry, I.R., Campbell, J., Lindstrom, K., Pruniski, B., Neumeyer, A.M., Radley, J.A., Phornphutkul, C., Schmidt, B., Wilson, W.G., Õunap, K., Reinson, K., Pajusalu, S., Haeringen, A. van, Ruivenkamp, C., Cuperus, R., Santos-Simarro, F., Palomares-Bralo, M., Pacio-Míguez, M., Ritter, A., Bhoj, E., Tønne, E., Tveten, K., Cappuccio, G., Brunetti-Pierri, N., Rowe, L., Bunn, J., Saenz, M., Platzer, K., Mertens, M., Caluseriu, O., Nowaczyk, M.J., Cohn, R.D., Kannu, P., Alkhunaizi, E., Chitayat, D., Scherer, S.W., Brunner, H.G., Vissers, L.E., Kleefstra, T., Koolen, D.A., Weksberg, R., Rots, D., Chater-Diehl, E., Dingemans, A.J.M., Goodman, S.J., Siu, M.T., Cytrynbaum, C., Choufani, S., Hoang, N., Walker, S., Awamleh, Z., Charkow, J., Meyn, S., Pfundt, R.P., Rinne, T.K., Gardeitchik, T., Vries, B.B.A. de, Deden, A.C., Leenders, E.K.S.M., Kwint, M.P., Stumpel, C., Stevens, S.J.C., Vermeulen, J.R., Harssel, J.V.T. van, Bosch, D.G.M., Gassen, K.L.I. van, Binsbergen, E. van, Geus, C.M. de, Brackel, H., Hempel, M., Lessel, D., Denecke, J., Slavotinek, A., Strober, J., Crunk, A., Folk, L., Wentzensen, I.M., Yang, H., Zou, F., Millan, F., Person, R., Xie, Y., Liu, S., Ousager, L.B., Larsen, M., Schultz-Rogers, L., Morava, E., Klee, E.W., Berry, I.R., Campbell, J., Lindstrom, K., Pruniski, B., Neumeyer, A.M., Radley, J.A., Phornphutkul, C., Schmidt, B., Wilson, W.G., Õunap, K., Reinson, K., Pajusalu, S., Haeringen, A. van, Ruivenkamp, C., Cuperus, R., Santos-Simarro, F., Palomares-Bralo, M., Pacio-Míguez, M., Ritter, A., Bhoj, E., Tønne, E., Tveten, K., Cappuccio, G., Brunetti-Pierri, N., Rowe, L., Bunn, J., Saenz, M., Platzer, K., Mertens, M., Caluseriu, O., Nowaczyk, M.J., Cohn, R.D., Kannu, P., Alkhunaizi, E., Chitayat, D., Scherer, S.W., Brunner, H.G., Vissers, L.E., Kleefstra, T., Koolen, D.A., and Weksberg, R.

Abstract

Contains fulltext : 234078.pdf (Publisher’s version ) (Open Access), Truncating variants in exons 33 and 34 of the SNF2-related CREBBP activator protein (SRCAP) gene cause the neurodevelopmental disorder (NDD) Floating-Harbor syndrome (FLHS), characterized by short stature, speech delay, and facial dysmorphism. Here, we present a cohort of 33 individuals with clinical features distinct from FLHS and truncating (mostly de novo) SRCAP variants either proximal (n = 28) or distal (n = 5) to the FLHS locus. Detailed clinical characterization of the proximal SRCAP individuals identified shared characteristics: developmental delay with or without intellectual disability, behavioral and psychiatric problems, non-specific facial features, musculoskeletal issues, and hypotonia. Because FLHS is known to be associated with a unique set of DNA methylation (DNAm) changes in blood, a DNAm signature, we investigated whether there was a distinct signature associated with our affected individuals. A machine-learning model, based on the FLHS DNAm signature, negatively classified all our tested subjects. Comparing proximal variants with typically developing controls, we identified a DNAm signature distinct from the FLHS signature. Based on the DNAm and clinical data, we refer to the condition as "non-FLHS SRCAP-related NDD." All five distal variants classified negatively using the FLHS DNAm model while two classified positively using the proximal model. This suggests divergent pathogenicity of these variants, though clinically the distal group presented with NDD, similar to the proximal SRCAP group. In summary, for SRCAP, there is a clear relationship between variant location, DNAm profile, and clinical phenotype. These results highlight the power of combined epigenetic, molecular, and clinical studies to identify and characterize genotype-epigenotype-phenotype correlations.

Published
2021

6. Jumonji Domain Containing 1C (JMJD1C) Sequence Variants in Seven Patients With Autism Spectrum Disorder, Intellectual Disability and Seizures

Author

Slavotinek, A., Hagen, J.M. van, Kalsner, L., Pai, S., Davis-Keppen, L., Ohden, L., Weber, Y.G., Macke, E.L., Klee, E.W., Morava, E., Gunderson, L., Person, R., Liu, S., Weiss, M.M., Slavotinek, A., Hagen, J.M. van, Kalsner, L., Pai, S., Davis-Keppen, L., Ohden, L., Weber, Y.G., Macke, E.L., Klee, E.W., Morava, E., Gunderson, L., Person, R., Liu, S., and Weiss, M.M.

Abstract

Contains fulltext : 220802.pdf (Publisher’s version ) (Closed access)

Published
2020

7. Partial Loss of USP9X Function Leads to a Male Neurodevelopmental and Behavioral Disorder Converging on Transforming Growth Factor beta Signaling

Author

Johnson, B.V., Kumar, R., Oishi, S., Alexander, S., Kasherman, M., Vega, M.S., Ivancevic, A., Gardner, A., Domingo, D., Corbett, M., Parnell, E., Yoon, S., Oh, T., Lines, M., Lefroy, H., Kini, U., Allen, M., Gronborg, S., Mercier, S., Kury, S., Bezieau, S., Pasquier, L., Raynaud, M., Afenjar, A., Villemeur, T. Billette de, Keren, B., Desir, J., Maldergem, L. Van, Marangoni, M., Dikow, N., Koolen, D.A., VanHasselt, P.M., Weiss, M., Zwijnenburg, P., Sa, J., Reis, C.F., Lopez-Otin, C., Santiago-Fernandez, O., Fernandez-Jaen, A., Rauch, A., Steindl, K., Joset, P., Goldstein, A., Madan-Khetarpal, S., Infante, E., Zackai, E., McDougall, C., Narayanan, V., Ramsey, K., Mercimek-Andrews, S., Pena, L., Shashi, V., Schoch, K., Sullivan, J.A., Pinto, E.V.F., Pichurin, P.N., Ewing, S.A., Barnett, S.S., Klee, E.W., Perry, M.S., Koenig, M.K., Keegan, C.E., Schuette, J.L., Asher, S., Perilla-Young, Y., Smith, L.D., Rosenfeld, J.A., Bhoj, E., Kaplan, P., Li, D., Oegema, R., Binsbergen, E. van, Zwaag, B. van der, Smeland, M.F., Cutcutache, I., Page, M., Armstrong, M., Lin, A.E., Steeves, M.A., Hollander, N.D., Hoffer, M.J.V., Reijnders, M.R., Demirdas, S., Koboldt, D.C., Bartholomew, D., Mosher, T.M., Hickey, S.E., Shieh, C., Sanchez-Lara, P.A., Graham, J.M., Tezcan, K., Schaefer, G.B., Danylchuk, N.R., Asamoah, A., Jackson, K.E., Yachelevich, N., Au, M., Perez-Jurado, L.A., Kleefstra, T., Penzes, P., Gécz, J., Jolly, L.A., Johnson, B.V., Kumar, R., Oishi, S., Alexander, S., Kasherman, M., Vega, M.S., Ivancevic, A., Gardner, A., Domingo, D., Corbett, M., Parnell, E., Yoon, S., Oh, T., Lines, M., Lefroy, H., Kini, U., Allen, M., Gronborg, S., Mercier, S., Kury, S., Bezieau, S., Pasquier, L., Raynaud, M., Afenjar, A., Villemeur, T. Billette de, Keren, B., Desir, J., Maldergem, L. Van, Marangoni, M., Dikow, N., Koolen, D.A., VanHasselt, P.M., Weiss, M., Zwijnenburg, P., Sa, J., Reis, C.F., Lopez-Otin, C., Santiago-Fernandez, O., Fernandez-Jaen, A., Rauch, A., Steindl, K., Joset, P., Goldstein, A., Madan-Khetarpal, S., Infante, E., Zackai, E., McDougall, C., Narayanan, V., Ramsey, K., Mercimek-Andrews, S., Pena, L., Shashi, V., Schoch, K., Sullivan, J.A., Pinto, E.V.F., Pichurin, P.N., Ewing, S.A., Barnett, S.S., Klee, E.W., Perry, M.S., Koenig, M.K., Keegan, C.E., Schuette, J.L., Asher, S., Perilla-Young, Y., Smith, L.D., Rosenfeld, J.A., Bhoj, E., Kaplan, P., Li, D., Oegema, R., Binsbergen, E. van, Zwaag, B. van der, Smeland, M.F., Cutcutache, I., Page, M., Armstrong, M., Lin, A.E., Steeves, M.A., Hollander, N.D., Hoffer, M.J.V., Reijnders, M.R., Demirdas, S., Koboldt, D.C., Bartholomew, D., Mosher, T.M., Hickey, S.E., Shieh, C., Sanchez-Lara, P.A., Graham, J.M., Tezcan, K., Schaefer, G.B., Danylchuk, N.R., Asamoah, A., Jackson, K.E., Yachelevich, N., Au, M., Perez-Jurado, L.A., Kleefstra, T., Penzes, P., Gécz, J., and Jolly, L.A.

Abstract

Contains fulltext : 218305.pdf (Publisher’s version ) (Closed access), BACKGROUND: The X-chromosome gene USP9X encodes a deubiquitylating enzyme that has been associated with neurodevelopmental disorders primarily in female subjects. USP9X escapes X inactivation, and in female subjects de novo heterozygous copy number loss or truncating mutations cause haploinsufficiency culminating in a recognizable syndrome with intellectual disability and signature brain and congenital abnormalities. In contrast, the involvement of USP9X in male neurodevelopmental disorders remains tentative. METHODS: We used clinically recommended guidelines to collect and interrogate the pathogenicity of 44 USP9X variants associated with neurodevelopmental disorders in males. Functional studies in patient-derived cell lines and mice were used to determine mechanisms of pathology. RESULTS: Twelve missense variants showed strong evidence of pathogenicity. We define a characteristic phenotype of the central nervous system (white matter disturbances, thin corpus callosum, and widened ventricles); global delay with significant alteration of speech, language, and behavior; hypotonia; joint hypermobility; visual system defects; and other common congenital and dysmorphic features. Comparison of in silico and phenotypical features align additional variants of unknown significance with likely pathogenicity. In support of partial loss-of-function mechanisms, using patient-derived cell lines, we show loss of only specific USP9X substrates that regulate neurodevelopmental signaling pathways and a united defect in transforming growth factor beta signaling. In addition, we find correlates of the male phenotype in Usp9x brain-specific knockout mice, and further resolve loss of hippocampal-dependent learning and memory. CONCLUSIONS: Our data demonstrate the involvement of USP9X variants in a distinctive neurodevelopmental and behavioral syndrome in male subjects and identify plausible mechanisms of pathogenesis centered on disrupted transforming growth factor beta signaling and hi

Published
2020

8. 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
Full Text
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9. The Undiagnosed Diseases Network International: Five Years and More!

Author

Taruscio, D., Baynam, G., Cederroth, H., Groft, S.C., Klee, E.W., Kosaki, K., Lasko, P.F., Melegh, B., Riess, O., Salvatore, M., Gahl, W.A., Taruscio, D., Baynam, G., Cederroth, H., Groft, S.C., Klee, E.W., Kosaki, K., Lasko, P.F., Melegh, B., Riess, O., Salvatore, M., and Gahl, W.A.

Abstract

Contains fulltext : 220722.pdf (Publisher’s version ) (Closed access)

Published
2020

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

Author

Hengel, H., Bosso-Lefevre, C., Grady, G., Szenker-Ravi, E., Li, H., Pierce, S., Lebigot, E., 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., Slegtenhorst, M. van, 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., 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.P., Schule, 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, Malcolm, Jamuar, S.S., Schols, L., Reversade, B., Hengel, H., Bosso-Lefevre, C., Grady, G., Szenker-Ravi, E., Li, H., Pierce, S., Lebigot, E., 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., Slegtenhorst, M. van, 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., 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.P., Schule, 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, Malcolm, Jamuar, S.S., Schols, L., and Reversade, B.

Abstract

Contains fulltext : 218288.pdf (publisher's version ) (Open Access), 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

11. 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

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

Author

Salpietro, V. Dixon, C.L. Guo, H. Bello, O.D. 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. Männikkö, R. Manole, A. Brusco, A. Grosso, E. Ferrero, G.B. Armstrong-Moron, J. Gueden, S. Bar-Yosef, O. Tzadok, M. Monaghan, K.G. Santiago-Sim, T. Person, R.E. Cho, M.T. Willaert, R. Yoo, Y. Chae, J.-H. Quan, Y. Wu, H. Wang, T. Bernier, R.A. Xia, K. Blesson, A. Jain, M. Motazacker, M.M. Jaeger, B. Schneider, A.L. Boysen, K. Muir, A.M. Myers, C.T. Gavrilova, R.H. Gunderson, L. Schultz-Rogers, L. Klee, E.W. Dyment, D. Osmond, M. Parellada, M. Llorente, C. Gonzalez-Peñas, J. Carracedo, A. Van Haeringen, A. Ruivenkamp, C. Nava, C. Heron, D. Nardello, R. Iacomino, M. Minetti, C. Skabar, A. Fabretto, A. Hanna, M.G. Bugiardini, E. Hostettler, I. O’Callaghan, B. Khan, A. Cortese, A. O’Connor, E. Yau, W.Y. Bourinaris, T. Kaiyrzhanov, R. Chelban, V. Madej, M. Diana, M.C. Vari, M.S. Pedemonte, M. Bruno, C. Balagura, G. Scala, M. Fiorillo, C. Nobili, L. Malintan, N.T. Zanetti, M.N. Krishnakumar, S.S. Lignani, G. Jepson, J.E.C. Broda, P. Baldassari, S. Rossi, P. Fruscione, F. Madia, F. Traverso, M. De-Marco, P. Pérez-Dueñas, 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, J.S. Sultan, T. Kirmani, S. Ibrahim, S. Jan, F. Mine, J. Banu, S. Veggiotti, P. Zuccotti, G.V. Ferrari, M.D. Van Den Maagdenberg, A.M.J. Verrotti, A. Marseglia, G.L. Savasta, S. Soler, M.A. Scuderi, C. Borgione, E. Chimenz, R. Gitto, E. Dipasquale, V. Sallemi, A. Fusco, M. Cuppari, C. Cutrupi, M.C. Ruggieri, M. Cama, A. Capra, V. Mencacci, N.E. Boles, R. Gupta, N. Kabra, M. Papacostas, S. Zamba-Papanicolaou, E. Dardiotis, E. Maqbool, S. Rana, N. Atawneh, O. Lim, S.Y. Shaikh, F. Koutsis, G. Breza, M. Coviello, D.A. Dauvilliers, Y.A. AlKhawaja, I. AlKhawaja, M. Al-Mutairi, F. Stojkovic, T. Ferrucci, V. Zollo, M. Alkuraya, F.S. Kinali, M. Sherifa, H. Benrhouma, H. Turki, I.B.Y. Tazir, M. Obeid, M. Bakhtadze, S. Saadi, N.W. Zaki, M.S. Triki, C.C. Benfenati, F. Gustincich, S. Kara, M. Belcastro, V. Specchio, N. Capovilla, G. Karimiani, E.G. Salih, A.M. Okubadejo, N.U. Ojo, O.O. Oshinaike, O.O. Oguntunde, O. Wahab, K. Bello, A.H. 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, L.A. Xiromerisiou, G. David, E. Aguennouz, M. Fidani, L. Spanaki, C. Tucci, A. Raspall-Chaure, M. Chez, M. Tsai, A. Fassi, E. Shinawi, M. Constantino, J.N. De Zorzi, R. Fortuna, S. Kok, F. Keren, B. Bonneau, D. Choi, M. Benzeev, B. Zara, F. Mefford, H.C. Scheffer, I.E. Clayton-Smith, J. Macaya, A. Rothman, J.E. Eichler, E.E. Kullmann, D.M. Houlden, H. SYNAPS Study Group

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. © 2019, The Author(s).

Published
2019

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

Author

Konrad, E.D.H., Nardini, N., Caliebe, A., Nagel, I., Young, D., Horvath, G., Santoro, S.L., Shuss, C., Ziegler, A., Bonneau, D., Kempers, M.J.E., Pfundt, R.P., Legius, E., Bouman, A., Stuurman, K.E., Ounap, K., Pajusalu, S., Wojcik, M.H., Vasileiou, G., Guyader, G. Le, Schnelle, H.M., Berland, S., Zonneveld-Huijssoon, E., Kersten, S., Gupta, A., Blackburn, P.R., Ellingson, M.S., Ferber, M.J., Dhamija, R., Klee, E.W., McEntagart, M., Lichtenbelt, K.D., Kenney, A., Vergano, Samantha A., Jamra, R. Abou, Platzer, K., Pierpont, M. Ella, Khattar, D., Hopkin, R.J., Martin, R.J., Jongmans, M.C.J., Chang, V.Y., Martinez-Agosto, J.A., Kuismin, O., Kurki, M.I., Pietilainen, O., Palotie, A., Maarup, T.J., Johnson, D.S., Pedersen, K., Laulund, L.W., Lynch, S.A., Blyth, M., Prescott, K., Canham, N., Ibitoye, R., Brilstra, E.H., Shinawi, M., Fassi, E., Sticht, H., Gregor, A., Esch, H. Van, Zweier, C., Konrad, E.D.H., Nardini, N., Caliebe, A., Nagel, I., Young, D., Horvath, G., Santoro, S.L., Shuss, C., Ziegler, A., Bonneau, D., Kempers, M.J.E., Pfundt, R.P., Legius, E., Bouman, A., Stuurman, K.E., Ounap, K., Pajusalu, S., Wojcik, M.H., Vasileiou, G., Guyader, G. Le, Schnelle, H.M., Berland, S., Zonneveld-Huijssoon, E., Kersten, S., Gupta, A., Blackburn, P.R., Ellingson, M.S., Ferber, M.J., Dhamija, R., Klee, E.W., McEntagart, M., Lichtenbelt, K.D., Kenney, A., Vergano, Samantha A., Jamra, R. Abou, Platzer, K., Pierpont, M. Ella, Khattar, D., Hopkin, R.J., Martin, R.J., Jongmans, M.C.J., Chang, V.Y., Martinez-Agosto, J.A., Kuismin, O., Kurki, M.I., Pietilainen, O., Palotie, A., Maarup, T.J., Johnson, D.S., Pedersen, K., Laulund, L.W., Lynch, S.A., Blyth, M., Prescott, K., Canham, N., Ibitoye, R., Brilstra, E.H., Shinawi, M., Fassi, E., Sticht, H., Gregor, A., Esch, H. Van, and Zweier, C.

Abstract

Contains fulltext : 215582.pdf (publisher's version ) (Open Access), 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

15. Missense Variants in the Histone Acetyltransferase Complex Component Gene TRRAP Cause Autism and Syndromic Intellectual Disability

Author

Cogne, B., Ehresmann, S., Beauregard-Lacroix, E., Rousseau, J., Besnard, T., Garcia, T., Petrovski, S., Avni, S., McWalter, K., Blackburn, P.R., Sanders, S.J., Uguen, K., Harris, J., Cohen, J.S., Blyth, M., Lehman, A., Berg, J ., Li, M.H., Kini, U., Joss, S., Lippe, C., Gordon, C.T., Humberson, J.B., Robak, L., Scott, D.A., Sutton, V.R., Skraban, C.M., Johnston, J.J., Poduri, A., Nordenskjold, M., Shashi, V., Gerkes, E.H., Bongers, E.M.H.F., Gilissen, C.F., Zarate, Y.A., Kvarnung, M., Lally, K.P., Kulch, P.A., Daniels, B., Hernandez-Garcia, A., Stong, N., McGaughran, J., Retterer, K., Tveten, K., Sullivan, J., Geisheker, M.R., Stray-Pedersen, A., Tarpinian, J.M., Klee, E.W., Sapp, J.C., Zyskind, J., Holla, O.L., Bedoukian, E., Filippini, F., Guimier, A., Picard, A., Busk, O.L., Punetha, J., Pfundt, R.P., Lindstrand, A., Nordgren, A., Kalb, F., Desai, M., Ebanks, A.H., Jhangiani, S.N., Dewan, T., Akdemir, Z.H. Coban, Telegrafi, A., Zackai, E.H., Begtrup, A., Song, X., Toutain, A., Wentzensen, I.M., Odent, S., Bonneau, D., Latypova, X., Deb, W., Redon, S., Bilan, F., Legendre, M., Troyer, C., Whitlock, K., Caluseriu, O., Murphree, M.I., Pichurin, P.N., Agre, K., Gavrilova, R., Rinne, T.K., Park, M., Shain, C., Heinzen, E.L., Xiao, R., Amiel, J., Lyonnet, S., Isidor, B., Biesecker, L.G., Lowenstein, D., Posey, J.E., Denomme-Pichon, A.S., Ferec, C., et al., Cogne, B., Ehresmann, S., Beauregard-Lacroix, E., Rousseau, J., Besnard, T., Garcia, T., Petrovski, S., Avni, S., McWalter, K., Blackburn, P.R., Sanders, S.J., Uguen, K., Harris, J., Cohen, J.S., Blyth, M., Lehman, A., Berg, J ., Li, M.H., Kini, U., Joss, S., Lippe, C., Gordon, C.T., Humberson, J.B., Robak, L., Scott, D.A., Sutton, V.R., Skraban, C.M., Johnston, J.J., Poduri, A., Nordenskjold, M., Shashi, V., Gerkes, E.H., Bongers, E.M.H.F., Gilissen, C.F., Zarate, Y.A., Kvarnung, M., Lally, K.P., Kulch, P.A., Daniels, B., Hernandez-Garcia, A., Stong, N., McGaughran, J., Retterer, K., Tveten, K., Sullivan, J., Geisheker, M.R., Stray-Pedersen, A., Tarpinian, J.M., Klee, E.W., Sapp, J.C., Zyskind, J., Holla, O.L., Bedoukian, E., Filippini, F., Guimier, A., Picard, A., Busk, O.L., Punetha, J., Pfundt, R.P., Lindstrand, A., Nordgren, A., Kalb, F., Desai, M., Ebanks, A.H., Jhangiani, S.N., Dewan, T., Akdemir, Z.H. Coban, Telegrafi, A., Zackai, E.H., Begtrup, A., Song, X., Toutain, A., Wentzensen, I.M., Odent, S., Bonneau, D., Latypova, X., Deb, W., Redon, S., Bilan, F., Legendre, M., Troyer, C., Whitlock, K., Caluseriu, O., Murphree, M.I., Pichurin, P.N., Agre, K., Gavrilova, R., Rinne, T.K., Park, M., Shain, C., Heinzen, E.L., Xiao, R., Amiel, J., Lyonnet, S., Isidor, B., Biesecker, L.G., Lowenstein, D., Posey, J.E., Denomme-Pichon, A.S., and Ferec, C., et al.

Abstract

Contains fulltext : 202928.pdf (publisher's version ) (Open Access), Acetylation of the lysine residues in histones and other DNA-binding proteins plays a major role in regulation of eukaryotic gene expression. This process is controlled by histone acetyltransferases (HATs/KATs) found in multiprotein complexes that are recruited to chromatin by the scaffolding subunit transformation/transcription domain-associated protein (TRRAP). TRRAP is evolutionarily conserved and is among the top five genes intolerant to missense variation. Through an international collaboration, 17 distinct de novo or apparently de novo variants were identified in TRRAP in 24 individuals. A strong genotype-phenotype correlation was observed with two distinct clinical spectra. The first is a complex, multi-systemic syndrome associated with various malformations of the brain, heart, kidneys, and genitourinary system and characterized by a wide range of intellectual functioning; a number of affected individuals have intellectual disability (ID) and markedly impaired basic life functions. Individuals with this phenotype had missense variants clustering around the c.3127G>A p.(Ala1043Thr) variant identified in five individuals. The second spectrum manifested with autism spectrum disorder (ASD) and/or ID and epilepsy. Facial dysmorphism was seen in both groups and included upslanted palpebral fissures, epicanthus, telecanthus, a wide nasal bridge and ridge, a broad and smooth philtrum, and a thin upper lip. RNA sequencing analysis of skin fibroblasts derived from affected individuals skin fibroblasts showed significant changes in the expression of several genes implicated in neuronal function and ion transport. Thus, we describe here the clinical spectrum associated with TRRAP pathogenic missense variants, and we suggest a genotype-phenotype correlation useful for clinical evaluation of the pathogenicity of the variants.

Published
2019

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

Author

Konrad, E.D.H. (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.J.E. (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), Kenney, A. (Amy), Vergano, S.A. (Samantha A.), Abou Jamra, R. (Rami), Platzer, K. (Konrad), Ella Pierpont, M. (Mary), Khattar, D. (Divya), Hopkin, R., Martin, R.J. (Richard J.), Jongmans, M.C.J. (Marjolijn), Chang, V.Y. (Vivian Y.), Martinez-Agosto, J.A. (Julian A.), Kuismin, O. (Outi), Kurki, M.I. (Mitja I.), Pietiläinen, O.P.H. (Olli), Palotie, A. (Aarno), Maarup, T.J. (Timothy J.), Johnson, D. (David), 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), Sticht, H. (Heinrich), Gregor, A. (Anne), Esch, H. (Hilde) van, Zweier, C. (Christiane), Konrad, E.D.H. (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.J.E. (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), Kenney, A. (Amy), Vergano, S.A. (Samantha A.), Abou Jamra, R. (Rami), Platzer, K. (Konrad), Ella Pierpont, M. (Mary), Khattar, D. (Divya), Hopkin, R., Martin, R.J. (Richard J.), Jongmans, M.C.J. (Marjolijn), Chang, V.Y. (Vivian Y.), Martinez-Agosto, J.A. (Julian A.), Kuismin, O. (Outi), Kurki, M.I. (Mitja I.), Pietiläinen, O.P.H. (Olli), Palotie, A. (Aarno), Maarup, T.J. (Timothy J.), Johnson, D. (David), 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), Sticht, H. (Heinrich), Gregor, A. (Anne), Esch, H. (Hilde) van, and Zweier, C. (Christiane)

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 of CTCF-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
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17. De Novo Pathogenic Variants in CACNA1E Cause Developmental and Epileptic Encephalopathy with Contractures, Macrocephaly, and Dyskinesias

Author

Helbig, K.L., Lauerer, R.J., Bahr, J.C., Souza, I.A., Myers, C.T., Uysal, B., Schwarz, N., Gandini, M.A., Huang, S., Keren, B., Mignot, C., Afenjar, A., Villemeur, T. Billette de, Heron, D., Nava, C., Valence, S., Buratti, J., Fagerberg, C.R., Soerensen, K.P., Kibaek, M., Kamsteeg, E.J., Koolen, D.A., Gunning, B., Schelhaas, H.J., Kruer, M.C., Fox, J., Bakhtiari, S., Jarrar, R., Padilla-Lopez, S., Lindstrom, K., Jin, S.C., Zeng, X., Bilguvar, K., Papavasileiou, A., Xin, Q., Zhu, C., Boysen, K., Vairo, F., Lanpher, B.C., Klee, E.W., Tillema, J.M., Payne, E.T., Cousin, M.A., Kruisselbrink, T.M., Wick, M.J., Baker, J., Haan, E., Smith, N., Corbett, M.A., MacLennan, A.H., Gecz, J., Biskup, S., Goldmann, E., Rodan, L.H., Kichula, E., Segal, E., Jackson, K.E., Asamoah, A., Dimmock, D., McCarrier, J., Botto, L.D., Filloux, F., Tvrdik, T., Cascino, G.D., Klingerman, S., Neumann, C., Wang, R., Jacobsen, J.C., Nolan, M.A., Snell, R.G., Lehnert, K., Sadleir, L.G., Anderlid, B.M., Kvarnung, M., Guerrini, R., Friez, M.J., Lyons, M.J., Leonhard, J., Kringlen, G., Casas, K., Achkar, C.M. El, Smith, L.A., Rotenberg, A., Poduri, A., Sanchis-Juan, A., Carss, K.J., Rankin, J., Zeman, A., Raymond, F.L., Blyth, M., Kerr, B., Ruiz, K., Urquhart, J., Hughes, I., Banka, S., Hedrich, U.B.S., Scheffer, I.E., Helbig, I., Zamponi, G.W., Lerche, H., et al., Helbig, K.L., Lauerer, R.J., Bahr, J.C., Souza, I.A., Myers, C.T., Uysal, B., Schwarz, N., Gandini, M.A., Huang, S., Keren, B., Mignot, C., Afenjar, A., Villemeur, T. Billette de, Heron, D., Nava, C., Valence, S., Buratti, J., Fagerberg, C.R., Soerensen, K.P., Kibaek, M., Kamsteeg, E.J., Koolen, D.A., Gunning, B., Schelhaas, H.J., Kruer, M.C., Fox, J., Bakhtiari, S., Jarrar, R., Padilla-Lopez, S., Lindstrom, K., Jin, S.C., Zeng, X., Bilguvar, K., Papavasileiou, A., Xin, Q., Zhu, C., Boysen, K., Vairo, F., Lanpher, B.C., Klee, E.W., Tillema, J.M., Payne, E.T., Cousin, M.A., Kruisselbrink, T.M., Wick, M.J., Baker, J., Haan, E., Smith, N., Corbett, M.A., MacLennan, A.H., Gecz, J., Biskup, S., Goldmann, E., Rodan, L.H., Kichula, E., Segal, E., Jackson, K.E., Asamoah, A., Dimmock, D., McCarrier, J., Botto, L.D., Filloux, F., Tvrdik, T., Cascino, G.D., Klingerman, S., Neumann, C., Wang, R., Jacobsen, J.C., Nolan, M.A., Snell, R.G., Lehnert, K., Sadleir, L.G., Anderlid, B.M., Kvarnung, M., Guerrini, R., Friez, M.J., Lyons, M.J., Leonhard, J., Kringlen, G., Casas, K., Achkar, C.M. El, Smith, L.A., Rotenberg, A., Poduri, A., Sanchis-Juan, A., Carss, K.J., Rankin, J., Zeman, A., Raymond, F.L., Blyth, M., Kerr, B., Ruiz, K., Urquhart, J., Hughes, I., Banka, S., Hedrich, U.B.S., Scheffer, I.E., Helbig, I., Zamponi, G.W., and Lerche, H., et al.

Abstract

Item does not contain fulltext, Developmental and epileptic encephalopathies (DEEs) are severe neurodevelopmental disorders often beginning in infancy or early childhood that are characterized by intractable seizures, abundant epileptiform activity on EEG, and developmental impairment or regression. CACNA1E is highly expressed in the central nervous system and encodes the alpha1-subunit of the voltage-gated CaV2.3 channel, which conducts high voltage-activated R-type calcium currents that initiate synaptic transmission. Using next-generation sequencing techniques, we identified de novo CACNA1E variants in 30 individuals with DEE, characterized by refractory infantile-onset seizures, severe hypotonia, and profound developmental impairment, often with congenital contractures, macrocephaly, hyperkinetic movement disorders, and early death. Most of the 14, partially recurring, variants cluster within the cytoplasmic ends of all four S6 segments, which form the presumed CaV2.3 channel activation gate. Functional analysis of several S6 variants revealed consistent gain-of-function effects comprising facilitated voltage-dependent activation and slowed inactivation. Another variant located in the domain II S4-S5 linker results in facilitated activation and increased current density. Five participants achieved seizure freedom on the anti-epileptic drug topiramate, which blocks R-type calcium channels. We establish pathogenic variants in CACNA1E as a cause of DEEs and suggest facilitated R-type calcium currents as a disease mechanism for human epilepsy and developmental disorders.

Published
2018

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

Author

Ali Al Asmari, Emmanuelle Szenker-Ravi, Carine Bonnard, Bruno Reversade, Laura Schultz-Rogers, I. Kraegeloh-Mann, Maha Abdulrahim, Hesham Aldhalaan, Byrappa Venkatesh, Célia Bosso-Lefèvre, Aida Telegrafi, Hiyam M. Marzouqa, Gunaseelan Narayanan, Sha Tang, Sonal Mahida, Melanie A. Simpson, Fowzan S. Alkuraya, Michelle Eio, Eissa Faqeih, Renske Oegema, Sarah Weckhuysen, George Grady, Joseph J. Barycki, Mohammed Al-Owain, Lamyaa A. Jad, David A. Koolen, Marjon van Slegtenhorst, Tyler Mark Pierson, Marisa V. Andrews, Rebecca Schüle, Reinhard Keimer, Amber Begtrup, Sateesh Maddirevula, Michael Muriello, Sakkubai Naidu, Damien Haye, Adel A H Mahmoud, Brian Ciruna, Abdullah Tamim, Thong Teck Tan, Rolph Pfundt, Peter Bauer, Jiin Ying Lim, Ali Awaji, Marco Tartaglia, Meral Gunay-Aygun, Eric W. Klee, Marcia C. Willing, Monica Yau, Angelika Riess, Diego Martinelli, Sabina Barresi, Sumanty Tohari, Werner Deigendesch, Dirk Lefeber, Saumya Shekhar Jamuar, Ludger Schöls, Ralitza H. Gavrilova, Alvin Yu Jin Ng, Hannah Stamberger, Suleyman Gulsuner, Adam Claridge-Chang, Élise Lebigot, Moeenaldeen Al-Sayed, Ee Shien Tan, Kagistia Hana Utami, Sarah B. Pierce, Helene Verhelst, Hankun Li, James C. Stewart, Ingo Helbig, Tal Gilboa, Mahmoud A. Pouladi, Hagar Mor-Shaked, Boris Keren, Ajay S. Mathuru, Holger Hengel, Michèl A.A.P. Willemsen, Nader Handal, Tahsin Stefan Barakat, Sulwan M. Algain, Terrence Thomas, Lance H. Rodan, Mais Hashem, Wendy G. Mitchell, Center for Reproductive Medicine, ARD - Amsterdam Reproduction and Development, ACS - Diabetes & metabolism, Clinical Genetics, 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

Subjects
0301 basic medicine, Male, Glycobiology, General Physics and Astronomy, VARIANTS, Encephalopathy, Neurodegenerative, Germline, 0302 clinical medicine, UDP-GLUCOSE DEHYDROGENASE, Loss of Function Mutation, Medicine and Health Sciences, EMBRYOGENESIS, 2.1 Biological and endogenous factors, UGDH protein, human, Aetiology, Child, lcsh:Science, Zebrafish, UTILITY, Genetics, pathology [Organoids], Multidisciplinary, Uridine diphosphate glucose dehydrogenase, Uridine diphosphate, DP-glucuronic acid, Syndrome, Disorders of movement Donders Center for Medical Neuroscience [Radboudumc 3], Hypotonia, 3. Good health, Pedigree, DEFICIENCY, genetics [Loss of Function Mutation], Organoids, genetics [Uridine Diphosphate Glucose Dehydrogenase], Child, Preschool, Neurological, Medicine, Female, ddc:500, medicine.symptom, Oxidoreductases, Engineering sciences. Technology, Rare cancers Radboud Institute for Health Sciences [Radboudumc 9], ENZYME, Adolescent, CONGENITAL DISORDER, Science, Intellectual and Developmental Disabilities (IDD), genetics [Epilepsy], chemistry [Oxidoreductases], Genetics and Molecular Biology, Genes, Recessive, Biology, Uridine Diphosphate Glucose Dehydrogenase, Article, General Biochemistry, Genetics and Molecular Biology, 03 medical and health sciences, Protein Domains, medicine, Animals, Humans, Recessive, Clinical genetics, Allele, Preschool, Gene, Loss function, Alleles, HEPARAN-SULFATE, Phenocopy, genetics [Oxidoreductases], Neurodevelopmental disorders Donders Center for Medical Neuroscience [Radboudumc 7], Epilepsy, GLYCOSYLATION, Neurosciences, Infant, General Chemistry, biology.organism_classification, medicine.disease, Brain Disorders, carbohydrates (lipids), Kinetics, 030104 developmental biology, Genes, General Biochemistry, Neuronal development, lcsh:Q, Human medicine, 030217 neurology & neurosurgery, Congenital disorder
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

20. Genomic and phenotypic characterization of a broad panel of patient-derived xenografts reflects the diversity of glioblastoma

Author

Shulan Tian, Thomas M. Kollmeyer, Erik P. Sulman, Caterina Giannini, Dioval Remonde, Andrea Califano, Paul A. Decker, Huihuang Yan, Jeanette E. Eckel-Passow, Robert B. Jenkins, Jann N. Sarkaria, Ann C. Mladek, Terry C. Burns, Gaspar J. Kitange, Mark A. Schroeder, Fredric B. Meyer, Brian P. O'Neill, Brett L. Carlson, Rachael A. Vaubel, Alissa Caron, Daniel J. Ma, Lisa Evers, Eric W. Klee, Gobinda Sarkar, Roel G.W. Verhaak, Michael E. Berens, Nhan L. Tran, Harshil Dhruv, Daniel H. Lachance, Qianghu Wang, Rebecca Grove, Sen Peng, Ian F. Parney, Bianca M Marin, Vaubel R.A., Tian S., Remonde D., Schroeder M.A., Mladek A.C., Kitange G.J., Caron A., Kollmeyer T.M., Grove R., Peng S., Carlson B.L., Ma D.J., Sarkar G., Evers L., Decker P.A., Yan H., Dhruv H.D., Berens M.E., Wang Q., Marin B.M., Klee E.W., Califano A., LaChance D.H., Eckel-Passow J.E., Verhaak R.G., Sulman E.P., Burns T.C., Meyer F.B., O'Neill B.P., Tran N.L., Giannini C., Jenkins R.B., Parney I.F., and Sarkaria J.N.

Subjects
Male, 0301 basic medicine, Cancer Research, Mice, 0302 clinical medicine, Genotype, Promoter Regions, Genetic, DNA Modification Methylases, Aged, 80 and over, biology, Brain Neoplasms, Middle Aged, Phenotype, Isocitrate Dehydrogenase, ErbB Receptors, Survival Rate, Oncology, 030220 oncology & carcinogenesis, DNA methylation, Female, medicine.drug, Adult, IDH1, Brain tumor, Article, Young Adult, 03 medical and health sciences, Glioma, Exome Sequencing, Biomarkers, Tumor, Temozolomide, medicine, Animals, Humans, PTEN, Antineoplastic Agents, Alkylating, Aged, Neoplasm Staging, Tumor Suppressor Proteins, glioblastoma, xenograft, DNA Methylation, medicine.disease, Xenograft Model Antitumor Assays, DNA Repair Enzymes, 030104 developmental biology, Mutation, biology.protein, Cancer research, Glioblastoma
Abstract

Purpose: Glioblastoma is the most frequent and lethal primary brain tumor. Development of novel therapies relies on the availability of relevant preclinical models. We have established a panel of 96 glioblastoma patient-derived xenografts (PDX) and undertaken its genomic and phenotypic characterization. Experimental Design: PDXs were established from glioblastoma, IDH-wildtype (n = 93), glioblastoma, IDH-mutant (n = 2), diffuse midline glioma, H3 K27M-mutant (n = 1), and both primary (n = 60) and recurrent (n = 34) tumors. Tumor growth rates, histopathology, and treatment response were characterized. Integrated molecular profiling was performed by whole-exome sequencing (WES, n = 83), RNA-sequencing (n = 68), and genome-wide methylation profiling (n = 76). WES data from 24 patient tumors was compared with derivative models. Results: PDXs recapitulate many key phenotypic and molecular features of patient tumors. Orthotopic PDXs show characteristic tumor morphology and invasion patterns, but largely lack microvascular proliferation and necrosis. PDXs capture common and rare molecular drivers, including alterations of TERT, EGFR, PTEN, TP53, BRAF, and IDH1, most at frequencies comparable with human glioblastoma. However, PDGFRA amplification was absent. RNA-sequencing and genome-wide methylation profiling demonstrated broad representation of glioblastoma molecular subtypes. MGMT promoter methylation correlated with increased survival in response to temozolomide. WES of 24 matched patient tumors showed preservation of most genetic driver alterations, including EGFR amplification. However, in four patient–PDX pairs, driver alterations were gained or lost on engraftment, consistent with clonal selection. Conclusions: Our PDX panel captures the molecular heterogeneity of glioblastoma and recapitulates many salient genetic and phenotypic features. All models and genomic data are openly available to investigators.

Published
2020

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