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Williams syndrome intellectual disability

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https://www.readbyqxmd.com/read/29784083/a-homozygous-loss-of-function-camk2a-mutation-causes-growth-delay-frequent-seizures-and-severe-intellectual-disability
#1
Poh Hui Chia, Franklin Lei Zhong, Shinsuke Niwa, Carine Bonnard, Kagistia Hana Utami, Ruizhu Zeng, Hane Lee, Ascia Eskin, Stanley F Nelson, William H Xie, Samah Al-Tawalbeh, Mohammad El-Khateeb, Mohammad Shboul, Mahmoud A Pouladi, Mohammed Al-Raqad, Bruno Reversade
Calcium/calmodulin-dependent protein kinase II (CAMK2) plays fundamental roles in synaptic plasticity that underlies learning and memory. Here, we describe a new recessive neurodevelopmental syndrome with global developmental delay, seizures and intellectual disability. Using linkage analysis and exome sequencing, we found that this disease maps to chromosome 5q31.1-q34 and is caused by a biallelic germline mutation in CAMK2A . The missense mutation, p.His477Tyr is located in the CAMK2A association domain that is critical for its function and localization...
May 22, 2018: ELife
https://www.readbyqxmd.com/read/29681090/williams-beuren-syndrome-in-diverse-populations
#2
Paul Kruszka, Antonio R Porras, Deise Helena de Souza, Angélica Moresco, Victoria Huckstadt, Ashleigh D Gill, Alec P Boyle, Tommy Hu, Yonit A Addissie, Gary T K Mok, Cedrik Tekendo-Ngongang, Karen Fieggen, Eloise J Prijoles, Pranoot Tanpaiboon, Engela Honey, Ho-Ming Luk, Ivan F M Lo, Meow-Keong Thong, Premala Muthukumarasamy, Kelly L Jones, Khadija Belhassan, Karim Ouldim, Ihssane El Bouchikhi, Laila Bouguenouch, Anju Shukla, Katta M Girisha, Nirmala D Sirisena, Vajira H W Dissanayake, C Sampath Paththinige, Rupesh Mishra, Monisha S Kisling, Carlos R Ferreira, María Beatriz de Herreros, Ni-Chung Lee, Saumya S Jamuar, Angeline Lai, Ee Shien Tan, Jiin Ying Lim, Cham Breana Wen-Min, Neerja Gupta, Stephanie Lotz-Esquivel, Ramsés Badilla-Porras, Dalia Farouk Hussen, Mona O El Ruby, Engy A Ashaat, Siddaramappa J Patil, Leah Dowsett, Alison Eaton, A Micheil Innes, Vorasuk Shotelersuk, Ëben Badoe, Ambroise Wonkam, María Gabriela Obregon, Brian H Y Chung, Milana Trubnykova, Jorge La Serna, Bertha Elena Gallardo Jugo, Miguel Chávez Pastor, Hugo Hernán Abarca Barriga, Andre Megarbane, Beth A Kozel, Mieke M van Haelst, Roger E Stevenson, Marshall Summar, A Adebowale Adeyemo, Colleen A Morris, Danilo Moretti-Ferreira, Marius George Linguraru, Maximilian Muenke
Williams-Beuren syndrome (WBS) is a common microdeletion syndrome characterized by a 1.5Mb deletion in 7q11.23. The phenotype of WBS has been well described in populations of European descent with not as much attention given to other ethnicities. In this study, individuals with WBS from diverse populations were assessed clinically and by facial analysis technology. Clinical data and images from 137 individuals with WBS were found in 19 countries with an average age of 11 years and female gender of 45%. The most common clinical phenotype elements were periorbital fullness and intellectual disability which were present in greater than 90% of our cohort...
May 2018: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/29397238/hereditary-swi-snf-complex-deficiency-syndromes
#3
REVIEW
Abbas Agaimy, William D Foulkes
The SWItch Sucrose non-fermentable (SWI/SNF) complex is a highly conserved multi-subunit complex of proteins encoded by numerous genes mapped to different chromosomal regions. The complex regulates the process of chromatin remodelling and hence plays a central role in the epigenetic regulation of gene expression, cell proliferation and differentiation. During the last three decades, the SWI/SNF complex has been increasingly recognized as a central molecular event driving the initiation and/or progression of several benign and malignant neoplasms of different anatomic origin and having diverse histomorphological appearance...
February 1, 2018: Seminars in Diagnostic Pathology
https://www.readbyqxmd.com/read/29280247/learning-by-observation-and-learning-by-doing-in-down-and-williams-syndromes
#4
Francesca Foti, Deny Menghini, Paolo Alfieri, Floriana Costanzo, Laura Mandolesi, Laura Petrosini, Stefano Vicari
New skills may be learned by active experience (experiential learning or learning by doing) or by observation of others' experience (learning by observation). In general, learning by observation reduces the time and the attempts needed to learn complex actions and behaviors. The present research aimed to compare learning by observation and learning by doing in two clinical populations with different etiology of intellectual disability (ID), as individuals with Down syndrome (DS) and individuals with Williams syndrome (WS), with the hypothesis that specific profiles of learning may be found in each syndrome...
December 26, 2017: Developmental Science
https://www.readbyqxmd.com/read/29276005/histone-lysine-methylases-and-demethylases-in-the-landscape-of-human-developmental-disorders
#5
Víctor Faundes, William G Newman, Laura Bernardini, Natalie Canham, Jill Clayton-Smith, Bruno Dallapiccola, Sally J Davies, Michelle K Demos, Amy Goldman, Harinder Gill, Rachel Horton, Bronwyn Kerr, Dhavendra Kumar, Anna Lehman, Shane McKee, Jenny Morton, Michael J Parker, Julia Rankin, Lisa Robertson, I Karen Temple, Siddharth Banka
Histone lysine methyltransferases (KMTs) and demethylases (KDMs) underpin gene regulation. Here we demonstrate that variants causing haploinsufficiency of KMTs and KDMs are frequently encountered in individuals with developmental disorders. Using a combination of human variation databases and existing animal models, we determine 22 KMTs and KDMs as additional candidates for dominantly inherited developmental disorders. We show that KMTs and KDMs that are associated with, or are candidates for, dominant developmental disorders tend to have a higher level of transcription, longer canonical transcripts, more interactors, and a higher number and more types of post-translational modifications than other KMT and KDMs...
January 4, 2018: American Journal of Human Genetics
https://www.readbyqxmd.com/read/29274148/oral-findings-in-williams-beuren-syndrome
#6
S-B-P Ferreira, M-M Viana, N-G-F Maia, L-L Leão, R-A Machado, R-D Coletta, M-J-B de Aguiar, H Martelli-Júnior
BACKGROUND: Williams-Beuren syndrome (WBS; OMIM #194050) is a developmental disorder characterized by congenital heart disease, intellectual disability, dysmorphic facial features and ophthalmologic abnormalities. Oral abnormalities are also described in clinical manifestations of the disease. This paper describes orofacial features in patients with WBS. MATERIAL AND METHODS: Seventeen patients with a confirmed molecular diagnosis of WBS were examined for oral abnormalities through clinical oral evaluations and panoramic radiography...
January 1, 2018: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/29198722/a-recurrent-de-novo-nonsense-variant-in-zswim6-results-in-severe-intellectual-disability-without-frontonasal-or-limb-malformations
#7
Elizabeth E Palmer, Raman Kumar, Christopher T Gordon, Marie Shaw, Laurence Hubert, Renee Carroll, Marlène Rio, Lucinda Murray, Melanie Leffler, Tracy Dudding-Byth, Myriam Oufadem, Seema R Lalani, Andrea M Lewis, Fan Xia, Allison Tam, Richard Webster, Susan Brammah, Francesca Filippini, John Pollard, Judy Spies, Andre E Minoche, Mark J Cowley, Sarah Risen, Nina N Powell-Hamilton, Jessica E Tusi, LaDonna Immken, Honey Nagakura, Christine Bole-Feysot, Patrick Nitschké, Alexandrine Garrigue, Geneviève de Saint Basile, Emma Kivuva, Richard H Scott, Augusto Rendon, Arnold Munnich, William Newman, Bronwyn Kerr, Claude Besmond, Jill A Rosenfeld, Jeanne Amiel, Michael Field, Jozef Gecz
A recurrent de novo missense variant within the C-terminal Sin3-like domain of ZSWIM6 was previously reported to cause acromelic frontonasal dysostosis (AFND), an autosomal-dominant severe frontonasal and limb malformation syndrome, associated with neurocognitive and motor delay, via a proposed gain-of-function effect. We present detailed phenotypic information on seven unrelated individuals with a recurrent de novo nonsense variant (c.2737C>T [p.Arg913Ter]) in the penultimate exon of ZSWIM6 who have severe-profound intellectual disability and additional central and peripheral nervous system symptoms but an absence of frontonasal or limb malformations...
December 7, 2017: American Journal of Human Genetics
https://www.readbyqxmd.com/read/29183715/novel-mutations-and-a-severe-neurological-phenotype-in-sj%C3%A3-gren-larsson-syndrome-patients-from-iran
#8
Ariana Kariminejad, Mohammadreza Barzgar, Bita Bozorgmehr, Elham Keshavarz, Mohamad Hasan Kariminejad, Dana S'Aulis, William B Rizzo
Sjögren-Larsson syndrome (SLS) is a rare autosomal recessive disorder characterized by ichthyosis, spasticity and intellectual disability. The disease is caused by mutations in the ALDH3A2 gene that encodes fatty aldehyde dehydrogenase. We describe 7 Iranian SLS patients from 5 unrelated consanguineous families. Sequencing of ALDH3A2 identified 4 novel mutations, including a 26-bp deletion (c.25_50del), small in-frame deletion (c.370_372del; p.G124del), a termination (p.Q35Ter) and a missense mutation (p.Lys211Glu)...
March 2018: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/29171184/structural-malformations-of-the-brain-eye-and-pituitary-gland-in-phace-syndrome
#9
Jack E Steiner, Garrett N McCoy, Christopher P Hess, William B Dobyns, Denise W Metry, Beth A Drolet, Mohit Maheshwari, Dawn H Siegel
PHACE syndrome is the association of segmental facial hemangiomas with congenital arterial, brain, cardiac, and ocular anomalies. Structural brain malformations affect 41-52% of PHACE patients and can be associated with focal neurologic deficits, developmental delays, and/or intellectual disability. To better characterize the spectrum of structural brain and other intracranial anomalies in PHACE syndrome, MRI scans of the head/neck were retrospectively reviewed in 55 patients from the PHACE Syndrome International Clinical Registry and Genetic Repository...
January 2018: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/29153020/-williams-beuren-syndrome-williams-syndrome-case-report
#10
Györgyi Miklós, György Fekete, Irén Haltrich, Miklós Tóth, Péter Reismann
Williams syndrome is a rare genetic disorder, that occurs equally in all ethnic groups and both sexes. The diagnosis might be missed during childhood in mild cases. However, establishing the diagnosis is important, not only to find the cause of intellectual disability but to look for cardiovascular, endocrine, psychiatry, urology and other conditions, which can occur at any age in the patients' lifetime. This case report presents the story of 47-year-old woman, who was admitted with haematemesis. During her stay on the ward, in the light of the distinctive facial features, mental retardation, and social behaviour patterns, the possibility of Williams syndrome emerged...
November 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/29128445/the-promise-of-induced-pluripotent-stem-cells-for-neurodevelopmental-disorders
#11
REVIEW
Katrin Linda, Carol Fiuza, Nael Nadif Kasri
A major challenge in clinical genetics and medicine is represented by genetically and phenotypically highly diverse neurodevelopmental disorders, like for example intellectual disability and autism. Intellectual disability is characterized by substantial limitations in cognitive function and adaptive behaviour. At the cellular level, this is reflected by deficits in synaptic structure and plasticity and therefore has been coined as a synaptic disorder or "synaptopathy". In this review, we summarize the findings from recent studies in which iPSCs have been used to model specific neurodevelopmental syndromes, including Fragile X syndrome, Rett syndrome, Williams-Beuren syndrome and Phelan-McDermid syndrome...
November 8, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29097652/spermine-synthase-deficiency-causes-lysosomal-dysfunction-and-oxidative-stress-in-models-of-snyder-robinson-syndrome
#12
Chong Li, Jennifer M Brazill, Sha Liu, Christofer Bello, Yi Zhu, Marie Morimoto, Lauren Cascio, Rini Pauly, Zoraida Diaz-Perez, May Christine V Malicdan, Hongbo Wang, Luigi Boccuto, Charles E Schwartz, William A Gahl, Cornelius F Boerkoel, R Grace Zhai
Polyamines are tightly regulated polycations that are essential for life. Loss-of-function mutations in spermine synthase (SMS), a polyamine biosynthesis enzyme, cause Snyder-Robinson syndrome (SRS), an X-linked intellectual disability syndrome; however, little is known about the neuropathogenesis of the disease. Here we show that loss of dSms in Drosophila recapitulates the pathological polyamine imbalance of SRS and causes survival defects and synaptic degeneration. SMS deficiency leads to excessive spermidine catabolism, which generates toxic metabolites that cause lysosomal defects and oxidative stress...
November 2, 2017: Nature Communications
https://www.readbyqxmd.com/read/29097605/pura-syndrome-clinical-delineation-and-genotype-phenotype-study-in-32-individuals-with-review-of-published-literature
#13
Margot R F Reijnders, Robert Janowski, Mohsan Alvi, Jay E Self, Ton J van Essen, Maaike Vreeburg, Rob P W Rouhl, Servi J C Stevens, Alexander P A Stegmann, Jolanda Schieving, Rolph Pfundt, Katinke van Dijk, Eric Smeets, Connie T R M Stumpel, Levinus A Bok, Jan Maarten Cobben, Marc Engelen, Sahar Mansour, Margo Whiteford, Kate E Chandler, Sofia Douzgou, Nicola S Cooper, Ene-Choo Tan, Roger Foo, Angeline H M Lai, Julia Rankin, Andrew Green, Tuula Lönnqvist, Pirjo Isohanni, Shelley Williams, Ilene Ruhoy, Karen S Carvalho, James J Dowling, Dorit L Lev, Katalin Sterbova, Petra Lassuthova, Jana Neupauerová, Jeff L Waugh, Sotirios Keros, Jill Clayton-Smith, Sarah F Smithson, Han G Brunner, Ceciel van Hoeckel, Mel Anderson, Virginia E Clowes, Victoria Mok Siu, The Ddd Study, Paulo Selber, Richard J Leventer, Christoffer Nellaker, Dierk Niessing, David Hunt, Diana Baralle
BACKGROUND: De novo mutations in PURA have recently been described to cause PURA syndrome, a neurodevelopmental disorder characterised by severe intellectual disability (ID), epilepsy, feeding difficulties and neonatal hypotonia. OBJECTIVES: To delineate the clinical spectrum of PURA syndrome and study genotype-phenotype correlations. METHODS: Diagnostic or research-based exome or Sanger sequencing was performed in individuals with ID. We systematically collected clinical and mutation data on newly ascertained PURA syndrome individuals, evaluated data of previously reported individuals and performed a computational analysis of photographs...
February 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29050398/delineating-sptan1-associated-phenotypes-from-isolated-epilepsy-to-encephalopathy-with-progressive-brain-atrophy
#14
Steffen Syrbe, Frederike L Harms, Elena Parrini, Martino Montomoli, Ulrike Mütze, Katherine L Helbig, Tilman Polster, Beate Albrecht, Ulrich Bernbeck, Ellen van Binsbergen, Saskia Biskup, Lydie Burglen, Jonas Denecke, Bénédicte Heron, Henrike O Heyne, Georg F Hoffmann, Frauke Hornemann, Takeshi Matsushige, Ryuki Matsuura, Mitsuhiro Kato, G Christoph Korenke, Alma Kuechler, Constanze Lämmer, Andreas Merkenschlager, Cyril Mignot, Susanne Ruf, Mitsuko Nakashima, Hirotomo Saitsu, Hannah Stamberger, Tiziana Pisano, Jun Tohyama, Sarah Weckhuysen, Wendy Werckx, Julia Wickert, Francesco Mari, Nienke E Verbeek, Rikke S Møller, Bobby Koeleman, Naomichi Matsumoto, William B Dobyns, Domenica Battaglia, Johannes R Lemke, Kerstin Kutsche, Renzo Guerrini
De novo in-frame deletions and duplications in the SPTAN1 gene, encoding the non-erythrocyte αII spectrin, have been associated with severe West syndrome with hypomyelination and pontocerebellar atrophy. We aimed at comprehensively delineating the phenotypic spectrum associated with SPTAN1 mutations. Using different molecular genetic techniques, we identified 20 patients with a pathogenic or likely pathogenic SPTAN1 variant and reviewed their clinical, genetic and imaging data. SPTAN1 de novo alterations included seven unique missense variants and nine in-frame deletions/duplications of which 12 were novel...
September 1, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28937389/incontinentia-pigmenti-an-x-linked-dominant-disorder-in-a-2-year-old-boy-with-klinefelter-syndrome
#15
Abhilasha Williams, Laxmisha Chandrashekar, Vivi M Srivastava, Meera Thomas, Saban Horo, Renu George
Incontinentia pigmenti (IP) is a rare X-linked dominant disorder, in which skin lesions distributed along Blaschko's lines appear shortly after birth. Early lesions which are erythematous/bullous evolve over time into warty lesions, hyperpigmented swirls/macules, and atrophic hypopigmented streaks. Clinical features are heterogeneous. Abnormalities of the teeth, nails, hair, eyes, central nervous system, and breast may also be present. While intelligence is generally normal, varied degrees of intellectual disability/developmental delay have been reported...
July 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/28899917/activity-dependent-dysfunction-in-visual-and-olfactory-sensory-systems-in-mouse-models-of-down-syndrome
#16
Christopher M William, Lubna Saqran, Matthew A Stern, Charles L Chiang, Scott P Herrick, Aziz Rangwala, Mark W Albers, Matthew P Frosch, Bradley T Hyman
Activity-dependent synaptic plasticity plays a critical role in the refinement of circuitry during postnatal development and may be disrupted in conditions that cause intellectual disability, such as Down syndrome (DS). To test this hypothesis, visual cortical plasticity was assessed in Ts65Dn mice that harbor a chromosomal duplication syntenic to human chromosome 21q. We find that Ts65Dn mice demonstrate a defect in ocular dominance plasticity (ODP) following monocular deprivation. This phenotype is similar to that of transgenic mice that express amyloid precursor protein (APP), which is duplicated in DS and in Ts65DN mice; however, normalizing APP gene copy number in Ts65Dn mice fails to rescue plasticity...
October 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28794905/further-clinical-delineation-of-the-mef2c-haploinsufficiency-syndrome-report-on-new-cases-and-literature-review-of-severe-neurodevelopmental-disorders-presenting-with-seizures-absent-speech-and-involuntary-movements
#17
REVIEW
Irena Vrečar, Josie Innes, Elizabeth A Jones, Helen Kingston, William Reardon, Bronwyn Kerr, Jill Clayton-Smith, Sofia Douzgou
Mutations in the MEF2C ( myocyte enhancer factor 2 ) gene have been established as a cause for an intellectual disability syndrome presenting with seizures, absence of speech, stereotypic movements, hypotonia, and limited ambulation. Phenotypic overlap with Rett's and Angelman's syndromes has been noted. Following the first reports of 5q14.3q15 microdeletions encompassing the MEF2C gene, further cases with point mutations and partial gene deletions of the MEF2C gene have been described. We present the clinical phenotype of our cohort of six patients with MEF2C mutations and compare our findings with previously reported patients as well as with a growing number of genetic conditions presenting with a severe neurodevelopmental, Rett-like, phenotype...
September 2017: Journal of Pediatric Genetics
https://www.readbyqxmd.com/read/28590426/down-s-syndrome-and-triple-negative-breast-cancer-a-rare-occurrence-of-distinctive-clinical-relationship
#18
Nandini Dey, Amy Krie, Jessica Klein, Kirstin Williams, Amanda McMillan, Rachel Elsey, Yuliang Sun, Casey Williams, Pradip De, Brian Leyland-Jones
Down's syndrome (DS), the most common genetic cause of significant intellectual disability in children and adults is caused by the trisomy of either all or a part of human chromosome 21 (HSA21). Patients with DS mostly suffer from characteristic tumor types. Although individual patients of DS are at a higher risk for acute leukemia and testicular cancers, other types of solid tumors including breast cancers are mostly uncommon and have significantly lower-than-expected age-adjusted incidence rates. Except for an increased risk of retinoblastomas, and lymphomas, the risk of developing solid tumors has been found to be lower in both children and adults, and breast cancer was found to be almost absent (Hasle H...
June 7, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28575647/yy1-haploinsufficiency-causes-an-intellectual-disability-syndrome-featuring-transcriptional-and-chromatin-dysfunction
#19
Michele Gabriele, Anneke T Vulto-van Silfhout, Pierre-Luc Germain, Alessandro Vitriolo, Raman Kumar, Evelyn Douglas, Eric Haan, Kenjiro Kosaki, Toshiki Takenouchi, Anita Rauch, Katharina Steindl, Eirik Frengen, Doriana Misceo, Christeen Ramane J Pedurupillay, Petter Stromme, Jill A Rosenfeld, Yunru Shao, William J Craigen, Christian P Schaaf, David Rodriguez-Buritica, Laura Farach, Jennifer Friedman, Perla Thulin, Scott D McLean, Kimberly M Nugent, Jenny Morton, Jillian Nicholl, Joris Andrieux, Asbjørg Stray-Pedersen, Pascal Chambon, Sophie Patrier, Sally A Lynch, Susanne Kjaergaard, Pernille M Tørring, Charlotte Brasch-Andersen, Anne Ronan, Arie van Haeringen, Peter J Anderson, Zöe Powis, Han G Brunner, Rolph Pfundt, Janneke H M Schuurs-Hoeijmakers, Bregje W M van Bon, Stefan Lelieveld, Christian Gilissen, Willy M Nillesen, Lisenka E L M Vissers, Jozef Gecz, David A Koolen, Giuseppe Testa, Bert B A de Vries
Yin and yang 1 (YY1) is a well-known zinc-finger transcription factor with crucial roles in normal development and malignancy. YY1 acts both as a repressor and as an activator of gene expression. We have identified 23 individuals with de novo mutations or deletions of YY1 and phenotypic features that define a syndrome of cognitive impairment, behavioral alterations, intrauterine growth restriction, feeding problems, and various congenital malformations. Our combined clinical and molecular data define "YY1 syndrome" as a haploinsufficiency syndrome...
June 1, 2017: American Journal of Human Genetics
https://www.readbyqxmd.com/read/28574231/a-new-diagnosis-of-williams-beuren-syndrome-in-a-49-year-old-man-with-severe-bullous-emphysema
#20
Monica H Wojcik, Nikkola Carmichael, Frederick R Bieber, Daniel C Wiener, Rachna Madan, Barbara R Pober, Benjamin A Raby
Williams-Beuren syndrome (WBS) is a chromosomal microdeletion syndrome typically presenting with intellectual disability, a unique personality, a characteristic facial appearance, and cardiovascular disease. Several clinical features of WBS are thought to be due to haploinsufficiency of elastin (ELN), as the ELN locus is included within the WBS critical region at 7q11.23. Emphysema, a disease attributed to destruction of pulmonary elastic fibers, has been reported in patients without WBS who have pathogenic variants in ELN but only once (in one patient) in WBS...
August 2017: American Journal of Medical Genetics. Part A
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