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9 results on '"Õunap, Katrin"'

1. Linkage-specific deubiquitylation by OTUD5 defines an embryonic pathway intolerant to genomic variation

Author

Beck, David B, Basar, Mohammed A, Asmar, Anthony J, Thompson, Joyce J, Oda, Hirotsugu, Uehara, Daniela T, Saida, Ken, Pajusalu, Sander, Talvik, Inga, D'Souza, Precilla, Bodurtha, Joann, Mu, Weiyi, Barañano, Kristin W, Miyake, Noriko, Wang, Raymond, Kempers, Marlies, Tamada, Tomoko, Nishimura, Yutaka, Okada, Satoshi, Kosho, Tomoki, Dale, Ryan, Mitra, Apratim, Macnamara, Ellen, Undiagnosed Diseases Network, Matsumoto, Naomichi, Inazawa, Johji, Walkiewicz, Magdalena, Õunap, Katrin, Tifft, Cynthia J, Aksentijevich, Ivona, Kastner, Daniel L, Rocha, Pedro P, and Werner, Achim

Subjects
Pediatric, Rare Diseases, Ubiquitin, Human Genome, Ubiquitination, Genetics, Humans, Genomics, Undiagnosed Diseases Network, Generic health relevance, Chromatin, Signal Transduction
Abstract

Reversible modification of proteins with linkage-specific ubiquitin chains is critical for intracellular signaling. Information on physiological roles and underlying mechanisms of particular ubiquitin linkages during human development are limited. Here, relying on genomic constraint scores, we identify 10 patients with multiple congenital anomalies caused by hemizygous variants in OTUD5, encoding a K48/K63 linkage-specific deubiquitylase. By studying these mutations, we find that OTUD5 controls neuroectodermal differentiation through cleaving K48-linked ubiquitin chains to counteract degradation of select chromatin regulators (e.g., ARID1A/B, histone deacetylase 2, and HCF1), mutations of which underlie diseases that exhibit phenotypic overlap with OTUD5 patients. Loss of OTUD5 during differentiation leads to less accessible chromatin at neuroectodermal enhancers and aberrant gene expression. Our study describes a previously unidentified disorder we name LINKED (LINKage-specific deubiquitylation deficiency-induced Embryonic Defects) syndrome and reveals linkage-specific ubiquitin cleavage from chromatin remodelers as an essential signaling mode that coordinates chromatin remodeling during embryogenesis.

Published
2021

2. Additional file 2 of Artificial intelligence enables comprehensive genome interpretation and nomination of candidate diagnoses for rare genetic diseases

Author

De La Vega, Francisco M., Chowdhury, Shimul, Moore, Barry, Frise, Erwin, McCarthy, Jeanette, Hernandez, Edgar Javier, Wong, Terence, James, Kiely, Guidugli, Lucia, Agrawal, Pankaj B., Genetti, Casie A., Brownstein, Catherine A., Beggs, Alan H., Löscher, Britt-Sabina, Franke, Andre, Boone, Braden, Levy, Shawn E., Õunap, Katrin, Pajusalu, Sander, Huentelman, Matt, Ramsey, Keri, Naymik, Marcus, Narayanan, Vinodh, Veeraraghavan, Narayanan, Billings, Paul, Reese, Martin G., Yandell, Mark, and Kingsmore, Stephen F.

Abstract

Additional file 2. Supplementary Figures (Figures S1-S7).

Published
2021
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3. Histone H3.3 beyond cancer: Germline mutations in Histone 3 Family 3A and 3B cause a previously unidentified neurodegenerative disorder in 46 patients

Author

Bryant, Laura, Li, Dong, Cox, Samuel G, Marchione, Dylan, Joiner, Evan F, Wilson, Khadija, Janssen, Kevin, Lee, Pearl, March, Michael E, Nair, Divya, Sherr, Elliott, Fregeau, Brieana, Wierenga, Klaas J, Wadley, Alexandrea, Mancini, Grazia MS, Powell-Hamilton, Nina, van de Kamp, Jiddeke, Grebe, Theresa, Dean, John, Ross, Alison, Crawford, Heather P, Powis, Zoe, Cho, Megan T, Willing, Marcia C, Manwaring, Linda, Schot, Rachel, Nava, Caroline, Afenjar, Alexandra, Lessel, Davor, Wagner, Matias, Klopstock, Thomas, Winkelmann, Juliane, Catarino, Claudia B, Retterer, Kyle, Schuette, Jane L, Innis, Jeffrey W, Pizzino, Amy, Lüttgen, Sabine, Denecke, Jonas, Strom, Tim M, Monaghan, Kristin G, DDD Study, Yuan, Zuo-Fei, Dubbs, Holly, Bend, Renee, Lee, Jennifer A, Lyons, Michael J, Hoefele, Julia, Günthner, Roman, Reutter, Heiko, Keren, Boris, Radtke, Kelly, Sherbini, Omar, Mrokse, Cameron, Helbig, Katherine L, Odent, Sylvie, Cogne, Benjamin, Mercier, Sandra, Bezieau, Stephane, Besnard, Thomas, Kury, Sebastien, Redon, Richard, Reinson, Karit, Wojcik, Monica H, Õunap, Katrin, Ilves, Pilvi, Innes, A Micheil, Kernohan, Kristin D, Care4Rare Canada Consortium, Costain, Gregory, Meyn, M Stephen, Chitayat, David, Zackai, Elaine, Lehman, Anna, Kitson, Hilary, CAUSES Study, Martin, Martin G, Martinez-Agosto, Julian A, Undiagnosed Diseases Network, Nelson, Stan F, Palmer, Christina GS, Papp, Jeanette C, Parker, Neil H, Sinsheimer, Janet S, Vilain, Eric, Wan, Jijun, Yoon, Amanda J, Zheng, Allison, Brimble, Elise, Ferrero, Giovanni Battista, Radio, Francesca Clementina, Carli, Diana, Barresi, Sabina, Brusco, Alfredo, Tartaglia, Marco, Thomas, Jennifer Muncy, Umana, Luis, Weiss, Marjan M, Gotway, Garrett, and Stuurman, KE

Subjects
Pediatric Research Initiative, Care4Rare Canada Consortium, Human Genome, Neurodegenerative Diseases, Forkhead Transcription Factors, Undiagnosed Diseases Network, Zebrafish Proteins, Histones, CAUSES Study, Rare Diseases, Genetics, Animals, Humans, 2.1 Biological and endogenous factors, Aetiology, Zebrafish, Germ-Line Mutation, DDD Study, Biotechnology, Cancer
Abstract

Although somatic mutations in Histone 3.3 (H3.3) are well-studied drivers of oncogenesis, the role of germline mutations remains unreported. We analyze 46 patients bearing de novo germline mutations in histone 3 family 3A (H3F3A) or H3F3B with progressive neurologic dysfunction and congenital anomalies without malignancies. Molecular modeling of all 37 variants demonstrated clear disruptions in interactions with DNA, other histones, and histone chaperone proteins. Patient histone posttranslational modifications (PTMs) analysis revealed notably aberrant local PTM patterns distinct from the somatic lysine mutations that cause global PTM dysregulation. RNA sequencing on patient cells demonstrated up-regulated gene expression related to mitosis and cell division, and cellular assays confirmed an increased proliferative capacity. A zebrafish model showed craniofacial anomalies and a defect in Foxd3-derived glia. These data suggest that the mechanism of germline mutations are distinct from cancer-associated somatic histone mutations but may converge on control of cell proliferation.

Published
2020

4. Neurologic phenotypes associated with COL4A1/2 mutations

Author

Zagaglia, Sara, Selch, Christina, Nisevic, Jelena Radic, Mei, Davide, Michalak, Zuzanna, Hernandez-Hernandez, Laura, Krithika, S., Vezyroglou, Katharina, Varadkar, Sophia M., Pepler, Alexander, Biskup, Saskia, Leão, Miguel, Gärtner, Jutta, Merkenschlager, Andreas, Jaksch, Michaela, Møller, Rikke S., Gardella, Elena, Kristiansen, Britta Schlott, Hansen, Lars Kjærsgaard, Vari, Maria Stella, Helbig, Katherine L., Desai, Sonal, Smith-Hicks, Constance L., Hino-Fukuyo, Naomi, Talvik, Tiina, Laugesaar, Rael, Ilves, Pilvi, Õunap, Katrin, Körber, Ingrid, Hartlieb, Till, Kudernatsch, Manfred, Winkler, Peter, Schimmel, Mareike, Hasse, Anette, Knuf, Markus, Heinemeyer, Jan, Makowski, Christine, Ghedia, Sondhya, Subramanian, Gopinath M., Striano, Pasquale, Thomas, Rhys H., Micallef, Caroline, Thom, Maria, Werring, David J., Kluger, Gerhard Josef, Cross, J. Helen, Guerrini, Renzo, Balestrini, Simona, and Sisodiya, Sanjay M.

Subjects
ddc
Published
2018

5. Additional file 1: of Can untreated PKU patients escape from intellectual disability? A systematic review

Author

Danique Van Vliet, Wegberg, Annemiek Van, Ahring, Kirsten, Miroslaw Bik-Multanowski, Blau, Nenad, Bulut, Fatma, Casas, Kari, Bozena Didycz, Djordjevic, Maja, Federico, Antonio, Feillet, François, Gizewska, Maria, Gramer, Gwendolyn, Hertecant, Jozef, Hollak, Carla, Jørgensen, Jens, Karall, Daniela, Landau, Yuval, Leuzzi, Vincenzo, Mathisen, Per, Moseley, Kathryn, Mungan, Neslihan, Nardecchia, Francesca, Õunap, Katrin, Powell, Kimberly, Ramachandran, Radha, Rutsch, Frank, Setoodeh, Aria, Stojiljkovic, Maja, Trefz, Fritz, Usurelu, Natalia, Wilson, Callum, Karnebeek, Clara Van, Hanley, William, and Francjan Van Spronsen

Subjects
3. Good health
Abstract

Table S1. Reported and previously unreported cases of late-diagnosed (> 7 years) PKU patients who have escaped from intellectual disability despite high plasma Phe concentrations. (DOCX 52 kb)

6. Additional file 1: of Can untreated PKU patients escape from intellectual disability? A systematic review

Author

Danique Van Vliet, Wegberg, Annemiek Van, Ahring, Kirsten, Miroslaw Bik-Multanowski, Blau, Nenad, Bulut, Fatma, Casas, Kari, Bozena Didycz, Djordjevic, Maja, Federico, Antonio, Feillet, François, Gizewska, Maria, Gramer, Gwendolyn, Hertecant, Jozef, Hollak, Carla, Jørgensen, Jens, Karall, Daniela, Landau, Yuval, Leuzzi, Vincenzo, Mathisen, Per, Moseley, Kathryn, Mungan, Neslihan, Nardecchia, Francesca, Õunap, Katrin, Powell, Kimberly, Ramachandran, Radha, Rutsch, Frank, Setoodeh, Aria, Stojiljkovic, Maja, Trefz, Fritz, Usurelu, Natalia, Wilson, Callum, Karnebeek, Clara Van, Hanley, William, and Francjan Van Spronsen

Subjects
3. Good health
Abstract

Table S1. Reported and previously unreported cases of late-diagnosed (> 7 years) PKU patients who have escaped from intellectual disability despite high plasma Phe concentrations. (DOCX 52 kb)

7. Expert consensus document: Clinical and molecular diagnosis, screening and management of Beckwith-Wiedemann syndrome: an international consensus statement

Author

Brioude, Frédéric, Kalish, Jennifer M, Mussa, Alessandro, Foster, Alison C, Bliek, Jet, Ferrero, Giovanni Battista, Boonen, Susanne E, Cole, Trevor, Baker, Robert, Bertoletti, Monica, Cocchi, Guido, Coze, Carole, De Pellegrin, Maurizio, Hussain, Khalid, Ibrahim, Abdulla, Kilby, Mark D, Krajewska-Walasek, Malgorzata, Kratz, Christian P, Ladusans, Edmund J, Lapunzina, Pablo, Le Bouc, Yves, Maas, Saskia M, Macdonald, Fiona, Õunap, Katrin, Peruzzi, Licia, Rossignol, Sylvie, Russo, Silvia, Shipster, Caroleen, Skórka, Agata, Tatton-Brown, Katrina, Tenorio, Jair, Tortora, Chiara, Grønskov, Karen, Netchine, Irène, Hennekam, Raoul C, Prawitt, Dirk, Tümer, Zeynep, Eggermann, Thomas, Mackay, Deborah JG, Riccio, Andrea, and Maher, Eamonn R

Subjects
Beckwith-Wiedemann Syndrome, Consensus, DNA Copy Number Variations, Molecular Diagnostic Techniques, Reproductive Techniques, Assisted, Prenatal Diagnosis, Humans, DNA Methylation, Neoplasms, Germ Cell and Embryonal, Polymorphism, Single Nucleotide, 3. Good health
Abstract

Beckwith-Wiedemann syndrome (BWS), a human genomic imprinting disorder, is characterized by phenotypic variability that might include overgrowth, macroglossia, abdominal wall defects, neonatal hypoglycaemia, lateralized overgrowth and predisposition to embryonal tumours. Delineation of the molecular defects within the imprinted 11p15.5 region can predict familial recurrence risks and the risk (and type) of embryonal tumour. Despite recent advances in knowledge, there is marked heterogeneity in clinical diagnostic criteria and care. As detailed in this Consensus Statement, an international consensus group agreed upon 72 recommendations for the clinical and molecular diagnosis and management of BWS, including comprehensive protocols for the molecular investigation, care and treatment of patients from the prenatal period to adulthood. The consensus recommendations apply to patients with Beckwith-Wiedemann spectrum (BWSp), covering classical BWS without a molecular diagnosis and BWS-related phenotypes with an 11p15.5 molecular anomaly. Although the consensus group recommends a tumour surveillance programme targeted by molecular subgroups, surveillance might differ according to the local health-care system (for example, in the United States), and the results of targeted and universal surveillance should be evaluated prospectively. International collaboration, including a prospective audit of the results of implementing these consensus recommendations, is required to expand the evidence base for the design of optimum care pathways.

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

Author

Lorenzo Loberti, Lucia Pia Bruno, Stefania Granata, Gabriella Doddato, Sara Resciniti, Francesca Fava, Michele Carullo, Elisa Rahikkala, Guillaume Jouret, Leonie A Menke, Damien Lederer, Pascal Vrielynck, Lukáš Ryba, Nicola Brunetti-Pierri, Amaia Lasa-Aranzasti, Anna Maria Cueto-González, Laura Trujillano, Irene Valenzuela, Eduardo F Tizzano, Alessandro Mauro Spinelli, Irene Bruno, Aurora Currò, Franco Stanzial, Francesco Benedicenti, Diego Lopergolo, Filippo Maria Santorelli, Constantia Aristidou, George A Tanteles, Isabelle Maystadt, Tinatin Tkemaladze, Tiia Reimand, Helen Lokke, Katrin Õunap, Maria K Haanpää, Andrea Holubová, Veronika Zoubková, Martin Schwarz, Riina Žordania, Kai Muru, Laura Roht, Annika Tihveräinen, Rita Teek, Ulvi Thomson, Isis Atallah, Andrea Superti-Furga, Sabrina Buoni, Roberto Canitano, Valeria Scandurra, Annalisa Rossetti, Salvatore Grosso, Roberta Battini, Margherita Baldassarri, Maria Antonietta Mencarelli, Caterina Lo Rizzo, Mirella Bruttini, Francesca Mari, Francesca Ariani, Alessandra Renieri, Anna Maria Pinto, Loberti, Lorenzo, Bruno, Lucia Pia, Granata, Stefania, Doddato, Gabriella, Resciniti, Sara, Fava, Francesca, Carullo, Michele, Rahikkala, Elisa, Jouret, Guillaume, Menke, Leonie A, Lederer, Damien, Vrielynck, Pascal, Ryba, Lukáš, Brunetti-Pierri, Nicola, Lasa-Aranzasti, Amaia, Cueto-González, Anna Maria, Trujillano, Laura, Valenzuela, Irene, Tizzano, Eduardo F, Spinelli, Alessandro Mauro, Bruno, Irene, Currò, Aurora, Stanzial, Franco, Benedicenti, Francesco, Lopergolo, Diego, Santorelli, Filippo Maria, Aristidou, Constantia, Tanteles, George A, Maystadt, Isabelle, Tkemaladze, Tinatin, Reimand, Tiia, Lokke, Helen, Õunap, Katrin, Haanpää, Maria K, Holubová, Andrea, Zoubková, Veronika, Schwarz, Martin, Žordania, Riina, Muru, Kai, Roht, Laura, Tihveräinen, Annika, Teek, Rita, Thomson, Ulvi, Isis, Atallah, Superti-Furga, Andrea, Buoni, Sabrina, Canitano, Roberto, Scandurra, Valeria, Rossetti, Annalisa, Grosso, Salvatore, Battini, Roberta, Baldassarri, Margherita, Mencarelli, Maria Antonietta, Rizzo, Caterina Lo, Bruttini, Mirella, Mari, Francesca, Ariani, Francesca, Renieri, Alessandra, Pinto, Anna Maria, General Paediatrics, ANS - Cellular & Molecular Mechanisms, ANS - Complex Trait Genetics, ARD - Amsterdam Reproduction and Development, and Pediatrics

Subjects
Genetics, General Medicine, Molecular Biology, Genetics (clinical)
Abstract

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

Published
2022
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9. Truncating SRCAP variants outside the Floating-Harbor syndrome locus cause a distinct neurodevelopmental disorder with a specific DNA methylation signature

Author

Ian R. Berry, Martin R. Larsen, Ann M. Neumeyer, Lilian Bomme Ousager, Leah J. Rowe, Richard E. Person, Chanika Phornphutkul, David A. Koolen, Constance T. R. M. Stumpel, Konrad Platzer, Elizabeth J. Bhoj, Eric Chater-Diehl, Jason Bunn, Erika Leenders, Koen L.I. van Gassen, Joshua Charkow, Rosanna Weksberg, Ny Hoang, Roos Cuperus, Davor Lessel, Rolph Pfundt, Oana Caluseriu, Sarah J. Goodman, Leandra Folk, Fanggeng Zou, Michelle T. Siu, David Chitayat, Dmitrijs Rots, Jeroen R. Vermeulen, Shuxi Liu, Cheryl Cytrynbaum, Elin Tønne, Hein Brackel, Mareike Mertens, Jennifer Campbell, Jonathan B. Strober, Maja Hempel, Tjitske Kleefstra, Małgorzata J.M. Nowaczyk, Amy Crunk, Marta Pacio-Míguez, Fernando Santos-Simarro, Nicola Brunetti-Pierri, Christa de Geus, María Palomares-Bralo, Lisenka E.L.M. Vissers, Sander Pajusalu, Peter Kannu, Sanaa Choufani, Kristin Lindstrom, Margarita Saenz, Berkley Schmidt, Daniëlle G.M. Bosch, Han G. Brunner, Arie van Haeringen, Ellen van Binsbergen, Brianna Pruniski, Claudia A. L. Ruivenkamp, William G. Wilson, Servi J. C. Stevens, Susan Walker, Kristian Tveten, Zain Awamleh, Gerarda Cappuccio, Alexander J. M. Dingemans, Michael Kwint, Ebba Alkhunaizi, Jonas Denecke, Alyssa Ritter, Eric W. Klee, Bert B.A. de Vries, Jeske V.T. van Harssel, Stephen Meyn, A. Chantal Deden, Francisca Millan, Eva Morava, Ingrid M. Wentzensen, Anne Slavotinek, Stephen W. Scherer, Katrin Õunap, Tuula Rinne, Jessica A. Radley, Yili Xie, Thatjana Gardeitchik, Laura Schultz-Rogers, Karit Reinson, Ronald D. Cohn, Hui Yang, RS: GROW - R4 - Reproductive and Perinatal Medicine, MUMC+: DA KG Polikliniek (9), Klinische Genetica, MUMC+: DA KG Lab Centraal Lab (9), Klinische Neurowetenschappen, MUMC+: MA Med Staf Spec Neurologie (9), RS: MHeNs - R1 - Cognitive Neuropsychiatry and Clinical Neuroscience, MUMC+: DA Klinische Genetica (5), Rots, Dmitrij, Chater-Diehl, Eric, Dingemans, Alexander J M, Goodman, Sarah J, Siu, Michelle T, Cytrynbaum, Cheryl, Choufani, Sanaa, Hoang, Ny, Walker, Susan, Awamleh, Zain, Charkow, Joshua, Meyn, Stephen, Pfundt, Rolph, Rinne, Tuula, Gardeitchik, Thatjana, de Vries, Bert B A, Deden, A Chantal, Leenders, Erika, Kwint, Michael, Stumpel, Constance T R M, Stevens, Servi J C, Vermeulen, Jeroen R, van Harssel, Jeske V T, Bosch, Danielle G M, van Gassen, Koen L I, van Binsbergen, Ellen, de Geus, Christa M, Brackel, Hein, Hempel, Maja, Lessel, Davor, Denecke, Jona, Slavotinek, Anne, Strober, Jonathan, Crunk, Amy, Folk, Leandra, Wentzensen, Ingrid M, Yang, Hui, Zou, Fanggeng, Millan, Francisca, Person, Richard, Xie, Yili, Liu, Shuxi, Ousager, Lilian B, Larsen, Martin, Schultz-Rogers, Laura, Morava, Eva, Klee, Eric W, Berry, Ian R, Campbell, Jennifer, Lindstrom, Kristin, Pruniski, Brianna, Neumeyer, Ann M, Radley, Jessica A, Phornphutkul, Chanika, Schmidt, Berkley, Wilson, William G, Õunap, Katrin, Reinson, Karit, Pajusalu, Sander, van Haeringen, Arie, Ruivenkamp, Claudia, Cuperus, Roo, Santos-Simarro, Fernando, Palomares-Bralo, María, Pacio-Míguez, Marta, Ritter, Alyssa, Bhoj, Elizabeth, Tønne, Elin, Tveten, Kristian, Cappuccio, Gerarda, Brunetti-Pierri, Nicola, Rowe, Leah, Bunn, Jason, Saenz, Margarita, Platzer, Konrad, Mertens, Mareike, Caluseriu, Oana, Nowaczyk, Małgorzata J M, Cohn, Ronald D, Kannu, Peter, Alkhunaizi, Ebba, Chitayat, David, Scherer, Stephen W, Brunner, Han G, Vissers, Lisenka E L M, Kleefstra, Tjitske, Koolen, David A, and Weksberg, Rosanna

Subjects
0301 basic medicine, Heart Septal Defects, Ventricular, Male, DNA methylation signature, nonsense-mediated decay, speech delay, PROTEIN, 030105 genetics & heredity, PHENOTYPE, epigenomic, Medical and Health Sciences, Epigenesis, Genetic, Craniofacial Abnormalities, Cohort Studies, Neurodevelopmental disorder, 2.1 Biological and endogenous factors, Aetiology, Genetics (clinical), Growth Disorders, Epigenomics, non-FLHS SRCAP-related NDD, Genetics, Adenosine Triphosphatases, Genetics & Heredity, neurodevelopmental disorders, Metabolic Disorders Radboud Institute for Molecular Life Sciences [Radboudumc 6], SOTOS-LIKE, Biological Sciences, SRCAP, Hypotonia, AT-HOOK, 3. Good health, Phenotype, Mental Health, intellectual disability, Speech delay, DNA methylation, Female, medicine.symptom, Abnormalities, Multiple, EXON 34, Intellectual and Developmental Disabilities (IDD), Locus (genetics), Biology, genotype-phenotype correlation, DIAGNOSIS, Article, 03 medical and health sciences, Genetic, Clinical Research, medicine, Humans, Abnormalities, Multiple, Genetic Predisposition to Disease, Floating-Harbor syndrome, SPECTRUM, Neurodevelopmental disorders Donders Center for Medical Neuroscience [Radboudumc 7], MUTATIONS, Heart Septal Defects, Infant, Newborn, Ventricular, dNaM, Infant, DNA Methylation, medicine.disease, Newborn, neurodevelopmental disorder, GENE, Brain Disorders, 030104 developmental biology, Floating–Harbor syndrome, Case-Control Studies, Mutation, epigenomics, EPISIGNATURES, Epigenesis
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
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