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4 results on '"Silvia Maitz"'

1. P159: Variants in cohesin release factors WAPL, PDS5A, and PDS5B define a new class of cohesinopathies

Author

Philip Boone, Kamli Faour, Kiana Mohajeri, John Lemanski, Bimal Jana, Jack Fu, Jennifer Kerkhof, Haley McConkey, Ryan Collins, Diane Lucente, Celine de Esch, Mariana Moysés-Oliveira, Alexander Nuttle, Aloysius Domingo, Serkan Erdin, Maris Hanley, Amy Watt, Eric Surette, Gloria Lima, Laura Smith, Monica Salani, Rachita Yadav, Ricardo Harripaul, Kathryn O’Keefe, Nicholas Burt, Matthew Larson, Riya Bhavsar, Benjamin Currall, Susan Sell, Roger Ladda, LaDonna Immken, Catherine Buchanan, Bo Yuan, Sally Lynch, Christian Gilissen, Rolph Pfundt, Charlotte Ockeloen, Tjitske Kleefstra, Els Vanhoutte, Margje Sinnema, Sander Stegmann, Servi Stevens, Maria Iascone, Silvia Maitz, Benjamin Cogne, Cedric Le Caignec, Marie Vincent, Mathilde Nizon, Alison Male, Pankaj Agrawal, Michelle Thompson, Pernille Torring, Charlotte Brasch-Andersen, Laurence Faivre, Ange-Line Bruel, Bertrand Isidor, Christophe Philippe, Manuela Morleo, Monica Wojcik, Casie Genetti, Siddharth Srivastava, Sonia Ballal, Sophia Schließke, Rami Abou Jamra, Andree Delahaye, Lydia von Wintzingerode, Viktoria Bothe, Marine Houlier, Timothy Stout, Gaber Bergant, Borut Peterlin, Oana Moldovan, Núria Martínez-Gil, Emanuela Argilli, Elliott Sherr, Tamar Harel, Hallel Rosenberg-Fogler, Jill Rosenfeld, Ingrid Wentzensen, Dominik Westphal, Korbinian Riedhammer, Laura Orec, James Gusella, Bekim Sadikovic, Derek Tai, and Michael Talkowski

Subjects
Genetics, QH426-470, Medicine
Published
2023
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2. P267: TSC1/TSC2 mosaicism is found in ∼13% of individuals with tuberous sclerosis and is associated with a distinctive phenotypic severity

Author

Angela Peron, Rosa Maria Alfano, Barry Moore, Mark Nellist, Brent Pedersen, Francesca La Briola, Luigina Spaccini, Federica Natacci, Maria Paola Recalcati, Valentina Chiesa, Rosangela Arancio, Ugo Cavallari, Chiara Vannicola, Graziella Cefalo, Silvia Maitz, Stefania Bigoni, Lorenzo Gualandri, Cristina Gervasini, Pierangelo Veggiotti, Wilfred van Ijcken, Aglaia Vignoli, Gaetano Pietro Bulfamante, John Carey, and Maria Paola Canevini

Subjects
Genetics, QH426-470, Medicine
Published
2023
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3. Novel diagnostic DNA methylation episignatures expand and refine the epigenetic landscapes of Mendelian disorders

Author

Michael A. Levy, Haley McConkey, Jennifer Kerkhof, Mouna Barat-Houari, Sara Bargiacchi, Elisa Biamino, María Palomares Bralo, Gerarda Cappuccio, Andrea Ciolfi, Angus Clarke, Barbara R. DuPont, Mariet W. Elting, Laurence Faivre, Timothy Fee, Robin S. Fletcher, Florian Cherik, Aidin Foroutan, Michael J. Friez, Cristina Gervasini, Sadegheh Haghshenas, Benjamin A. Hilton, Zandra Jenkins, Simranpreet Kaur, Suzanne Lewis, Raymond J. Louie, Silvia Maitz, Donatella Milani, Angela T. Morgan, Renske Oegema, Elsebet Østergaard, Nathalie Ruiz Pallares, Maria Piccione, Simone Pizzi, Astrid S. Plomp, Cathryn Poulton, Jack Reilly, Raissa Relator, Rocio Rius, Stephen Robertson, Kathleen Rooney, Justine Rousseau, Gijs W.E. Santen, Fernando Santos-Simarro, Josephine Schijns, Gabriella Maria Squeo, Miya St John, Christel Thauvin-Robinet, Giovanna Traficante, Pleuntje J. van der Sluijs, Samantha A. Vergano, Niels Vos, Kellie K. Walden, Dimitar Azmanov, Tugce Balci, Siddharth Banka, Jozef Gecz, Peter Henneman, Jennifer A. Lee, Marcel M.A.M. Mannens, Tony Roscioli, Victoria Siu, David J. Amor, Gareth Baynam, Eric G. Bend, Kym Boycott, Nicola Brunetti-Pierri, Philippe M. Campeau, John Christodoulou, David Dyment, Natacha Esber, Jill A. Fahrner, Mark D. Fleming, David Genevieve, Kristin D. Kerrnohan, Alisdair McNeill, Leonie A. Menke, Giuseppe Merla, Paolo Prontera, Cheryl Rockman-Greenberg, Charles Schwartz, Steven A. Skinner, Roger E. Stevenson, Antonio Vitobello, Marco Tartaglia, Marielle Alders, Matthew L. Tedder, and Bekim Sadikovic

Subjects
Episignatures, Neurodevelopmental disorders, DNA methylation, Epigenetics, Clinical diagnostics, Genetics, QH426-470
Abstract

Summary: 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
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4. De Novo Variants in LMNB1 Cause Pronounced Syndromic Microcephaly and Disruption of Nuclear Envelope Integrity

Author

Anna Fernandez, Carmen Fons, Julie M. Jones, Francesca Cristofoli, Heather Flanagan-Steet, Melanie May, Richard Steet, Gerd Van der Hoeven, Koen Devriendt, Steven A. Skinner, Silvia Maitz, Angelo Selicorni, Hilde Van Esch, Loreto Martorell, Giuseppina Vitiello, Hannah W. Moore, Mathieu Bollen, Tonya Moss, Filip Roelens, and Joris Vermeesch

Subjects
0301 basic medicine, Proband, Male, Microcephaly, Gene Expression, Dwarfism, Biology, medicine.disease_cause, Corpus Callosum, 03 medical and health sciences, 0302 clinical medicine, Report, Intellectual Disability, Gene duplication, Genetics, medicine, Missense mutation, Humans, Amino Acid Sequence, Lymphocytes, Genetics (clinical), Cerebral Cortex, Mutation, Nuclear Lamina, Base Sequence, Lamin Type B, Leukodystrophy, Infant, medicine.disease, Magnetic Resonance Imaging, 030104 developmental biology, Child, Preschool, Nuclear lamina, Female, 030217 neurology & neurosurgery, Lamin
Abstract

Lamin B1 plays an important role in the nuclear envelope stability, the regulation of gene expression, and neural development. Duplication of LMNB1, or missense mutations increasing LMNB1 expression, are associated with autosomal-dominant leukodystrophy. On the basis of its role in neurogenesis, it has been postulated that LMNB1 variants could cause microcephaly. Here, we confirm this hypothesis with the identification of de novo mutations in LMNB1 in seven individuals with pronounced primary microcephaly (ranging from -3.6 to -12 SD) associated with relative short stature and variable degree of intellectual disability and neurological features as the core symptoms. Simplified gyral pattern of the cortex and abnormal corpus callosum were noted on MRI of three individuals, and these individuals also presented with a more severe phenotype. Functional analysis of the three missense mutations showed impaired formation of the LMNB1 nuclear lamina. The two variants located within the head group of LMNB1 result in a decrease in the nuclear localization of the protein and an increase in misshapen nuclei. We further demonstrate that another mutation, located in the coil region, leads to increased frequency of condensed nuclei and lower steady-state levels of lamin B1 in proband lymphoblasts. Our findings collectively indicate that de novo mutations in LMNB1 result in a dominant and damaging effect on nuclear envelope formation that correlates with microcephaly in humans. This adds LMNB1 to the growing list of genes implicated in severe autosomal-dominant microcephaly and broadens the phenotypic spectrum of the laminopathies.

Published
2020

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