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https://www.readbyqxmd.com/read/29330314/developmental-disability-at-school-age-and-difficulty-obtaining-follow-up-data
#1
Lex W Doyle, Peter J Anderson, Alice Burnett, Catherine Callanan, Marion McDonald, Marie Hayes, Gillian Opie, Elizabeth Carse, Jeanie L Y Cheong
BACKGROUND: The relationship of developmental disability rates with difficulty obtaining follow-up data is unclear. With this study, we aimed to determine if children who attended research follow-up assessments with more difficulty had more disability at school age, compared with those who attended with less difficulty, and to establish the relationship between follow-up and disability rates. METHODS: Two groups, comprising 219 consecutive survivors born at <28 weeks' gestation or at <1000 g birth weight in the state of Victoria, Australia, in 2005, and 218 term-born, normal birth weight controls were assessed at 8 years of age for neurodevelopmental disability (any of IQ <-1 SD, cerebral palsy, blindness, or deafness)...
January 12, 2018: Pediatrics
https://www.readbyqxmd.com/read/29327201/allele-specific-biased-expression-of-the-cntn6-gene-in-ips-cell-derived-neurons-from-a-patient-with-intellectual-disability-and-3p26-3-microduplication-involving-the-cntn6-gene
#2
Maria M Gridina, Natalia M Matveeva, Veniamin S Fishman, Aleksei G Menzorov, Helen A Kizilova, Nikolay A Beregovoy, Igor I Kovrigin, Inna E Pristyazhnyuk, Igor P Oscorbin, Maxim L Filipenko, Anna A Kashevarova, Nikolay A Skryabin, Tatyana V Nikitina, Elena A Sazhenova, Ludmila P Nazarenko, Igor N Lebedev, Oleg L Serov
Copy number variations (CNVs) of the human CNTN6 gene caused by megabase-scale microdeletions or microduplications in the 3p26.3 region are often the cause of neurodevelopmental disorders, including intellectual disability and developmental delay. Surprisingly, patients with different copy numbers of this gene display notable overlapping of neuropsychiatric symptoms. The complexity of the study of human neuropathologies is associated with the inaccessibility of brain material. This problem can be overcome through the use of reprogramming technologies that permit the generation of induced pluripotent stem (iPS) cells from fibroblasts and their subsequent in vitro differentiation into neurons...
January 11, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29325622/the-emerging-genetic-landscape-of-cerebral-palsy
#3
C L van Eyk, M A Corbett, A H Maclennan
Cerebral palsy (CP) is a broad clinical descriptor that encompasses a heterogeneous group of nonprogressive neurodevelopmental disabilities affecting movement and posture. While linked by the presence of damage to the developing brain, the etiology of CP is likely varied and the clinical outcomes are diverse. There is now a large body of evidence supporting a significant role for genetics in causation of CP. An increasing number of studies have identified likely causative genetic variants in families with CP, as well as in individual sporadic cases...
2018: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/29325223/maternal-thyroid-hormone-insufficiency-during-pregnancy-and-risk-of-neurodevelopmental-disorders-in-offspring-a-systematic-review-and-meta-analysis
#4
William Thompson, Ginny Russell, Genevieve Baragwanath, Justin Matthews, Bijay Vaidya, Jo Thompson-Coon
BACKGROUND: In the last two decades, several studies have examined the association between maternal thyroid hormone insufficiency during pregnancy and neurodevelopmental disorders in children and shown conflicting results. AIM: This systematic review aimed to assess the evidence for an association between maternal thyroid hormone insufficiency during pregnancy and neurodevelopmental disorders in children. We also sought to assess whether levothyroxine treatment for maternal thyroid hormone insufficiency improves child neurodevelopment outcomes...
January 11, 2018: Clinical Endocrinology
https://www.readbyqxmd.com/read/29320647/long-term-effects-of-inhaled-budesonide-for-bronchopulmonary-dysplasia
#5
Dirk Bassler, Eric S Shinwell, Mikko Hallman, Pierre-Henri Jarreau, Richard Plavka, Virgilio Carnielli, Christoph Meisner, Corinna Engel, Alexander Koch, Karen Kreutzer, Johannes N van den Anker, Matthias Schwab, Henry L Halliday, Christian F Poets
BACKGROUND: The long-term effects on neurodevelopment of the use of inhaled glucocorticoids in extremely preterm infants for the prevention or treatment of bronchopulmonary dysplasia are uncertain. METHODS: We randomly assigned 863 infants (gestational age, 23 weeks 0 days to 27 weeks 6 days) to receive early (within 24 hours after birth) inhaled budesonide or placebo. The prespecified secondary long-term outcome was neurodevelopmental disability among survivors, defined as a composite of cerebral palsy, cognitive delay (a Mental Development Index score of <85 [1 SD below the mean of 100] on the Bayley Scales of Infant Development, Second Edition, with higher scores on the scale indicating better performance), deafness, or blindness at a corrected age of 18 to 22 months...
January 11, 2018: New England Journal of Medicine
https://www.readbyqxmd.com/read/29317619/phf8-histone-demethylase-deficiency-causes-cognitive-impairments-through-the-mtor-pathway
#6
Xuemei Chen, Shuai Wang, Ying Zhou, Yanfei Han, Shengtian Li, Qing Xu, Longyong Xu, Ziqi Zhu, Youming Deng, Lu Yu, Lulu Song, Adele Pin Chen, Juan Song, Eiki Takahashi, Guang He, Lin He, Weidong Li, Charlie Degui Chen
Epigenomic abnormalities caused by genetic mutation in epigenetic regulators can result in neurodevelopmental disorders, deficiency in neural plasticity and mental retardation. As a histone demethylase, plant homeodomain finger protein 8 (Phf8) is a candidate gene for syndromal and non-specific forms of X-chromosome-linked intellectual disability (XLID). Here we report that Phf8 knockout mice displayed impaired learning and memory, and impaired hippocampal long-term potentiation (LTP) without gross morphological defects...
January 9, 2018: Nature Communications
https://www.readbyqxmd.com/read/29300384/phenotype-and-genotype-of-87-patients-with-mowat-wilson-syndrome-and-recommendations-for-care
#7
Ivan Ivanovski, Olivera Djuric, Stefano Giuseppe Caraffi, Daniela Santodirocco, Marzia Pollazzon, Simonetta Rosato, Duccio Maria Cordelli, Ebtesam Abdalla, Patrizia Accorsi, Margaret P Adam, Paola Francesca Ajmone, Magdalena Badura-Stronka, Chiara Baldo, Maddalena Baldi, Allan Bayat, Stefania Bigoni, Federico Bonvicini, Jeroen Breckpot, Bert Callewaert, Guido Cocchi, Goran Cuturilo, Daniele De Brasi, Koenraad Devriendt, Mary Beth Dinulos, Tina Duelund Hjortshøj, Roberta Epifanio, Francesca Faravelli, Agata Fiumara, Debora Formisano, Lucio Giordano, Marina Grasso, Sabine Grønborg, Alessandro Iodice, Lorenzo Iughetti, Vladimir Kuburovic, Anna Kutkowska-Kazmierczak, Didier Lacombe, Caterina Lo Rizzo, Anna Luchetti, Baris Malbora, Isabella Mammi, Francesca Mari, Giulia Montorsi, Sebastien Moutton, Rikke S Møller, Petra Muschke, Jens Erik Klint Nielsen, Ewa Obersztyn, Chiara Pantaleoni, Alessandro Pellicciari, Maria Antonietta Pisanti, Igor Prpic, Maria Luisa Poch-Olive, Federico Raviglione, Alessandra Renieri, Emilia Ricci, Francesca Rivieri, Gijs W Santen, Salvatore Savasta, Gioacchino Scarano, Ina Schanze, Angelo Selicorni, Margherita Silengo, Robert Smigiel, Luigina Spaccini, Giovanni Sorge, Krzysztof Szczaluba, Luigi Tarani, Luis Gonzaga Tone, Annick Toutain, Aurelien Trimouille, Elvis Terci Valera, Samantha Schrier Vergano, Nicoletta Zanotta, Martin Zenker, Andrea Conidi, Marcella Zollino, Anita Rauch, Christiane Zweier, Livia Garavelli
PurposeMowat-Wilson syndrome (MWS) is a rare intellectual disability/multiple congenital anomalies syndrome caused by heterozygous mutation of the ZEB2 gene. It is generally underestimated because its rarity and phenotypic variability sometimes make it difficult to recognize. Here, we aimed to better delineate the phenotype, natural history, and genotype-phenotype correlations of MWS.MethodsIn a collaborative study, we analyzed clinical data for 87 patients with molecularly confirmed diagnosis. We described the prevalence of all clinical aspects, including attainment of neurodevelopmental milestones, and compared the data with the various types of underlying ZEB2 pathogenic variations...
January 4, 2018: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/29298162/prenatal-maternal-serum-concentrations-of-per-and-polyfluoroalkyl-substances-in-association-with-autism-spectrum-disorder-and-intellectual-disability
#8
Kristen Lyall, Vincent M Yau, Robin Hansen, Martin Kharrazi, Cathleen K Yoshida, Antonia M Calafat, Gayle Windham, Lisa A Croen
BACKGROUND: Emerging work has examined neurodevelopmental outcomes following prenatal exposure to per- and polyfluoroalkyl substances (PFAS), but few studies have assessed associations with autism spectrum disorder (ASD). OBJECTIVES: Our objective was to estimate associations of maternal prenatal PFAS concentrations with ASD and intellectual disability (ID) in children. METHODS: Participants were from a population-based nested case-control study of children born from 2000 to 2003 in southern California, including children diagnosed with ASD (n=553), ID without autism (n=189), and general population (GP) controls (n=433)...
January 2, 2018: Environmental Health Perspectives
https://www.readbyqxmd.com/read/29291476/neurodevelopmental-disorders-in-prison-inmates-comorbidity-and-combined-associations-with-psychiatric-symptoms-and-behavioural-disturbance
#9
Susan Young, Rafael A González, Hannah Mullens, Laura Mutch, Isabella Malet-Lambert, Gisli H Gudjonsson
The identification and management of inmates with neurodevelopmental disorders (ND) has been insufficiently addressed in the literature. We estimated the proportion of cases with Attention deficit/hyperactivity disorder (ADHD), Autism spectrum disorder (ASD) and Intellectual disability (ID) in prison, their comorbidity, and associations with disruptive behaviours and with psychiatric symptoms. Further, we examined the role of coexisting ND on psychiatric symptoms and attitudes toward violence. All 390 male inmates underwent an assessment that included the Diagnostic Interview for ADHD in Adults 2...
December 15, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/29276005/histone-lysine-methylases-and-demethylases-in-the-landscape-of-human-developmental-disorders
#10
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/29275387/syndrome-of-x-linked-intellectual-disability-epilepsy-progressive-brain-atrophy-and-large-head-associated-with-slc9a6-mutation
#11
Hansashree Padmanabha, Arushi Gahlot Saini, Jitendra Kumar Sahu, Pratibha Singhi
SLC9A6 gene encodes for a sodium/hydrogen exchanger-6 protein mainly involved in endosomal trafficking and maintaining intraluminal pH. Loss of function mutations in SLC9A6 gene in children has been associated with Christianson syndrome and autism spectrum disorder. We describe a 3-year-old boy with intellectual disability, infantile-onset drug-refractory epilepsy, progressive brain atrophy and large head with a novel missense hemizygous mutation in exon 16 of the SLC9A6 gene on chromosome X. Presence of large head, early developmental regression and progressive cerebral atrophy expand the phenotypic spectrum of SLC9A6 mutations...
December 22, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29273094/b3galnt2-mutations-associated-with-non-syndromic-autosomal-recessive-intellectual-disability-reveal-a-lack-of-genotype-phenotype-associations-in-the-muscular-dystrophy-dystroglycanopathies
#12
Reza Maroofian, Moniek Riemersma, Lucas T Jae, Narges Zhianabed, Marjolein H Willemsen, Willemijn M Wissink-Lindhout, Michèl A Willemsen, Arjan P M de Brouwer, Mohammad Yahya Vahidi Mehrjardi, Mahmoud Reza Ashrafi, Benno Kusters, Tjitske Kleefstra, Yalda Jamshidi, Mojila Nasseri, Rolph Pfundt, Thijn R Brummelkamp, Mohammad Reza Abbaszadegan, Dirk J Lefeber, Hans van Bokhoven
BACKGROUND: The phenotypic severity of congenital muscular dystrophy-dystroglycanopathy (MDDG) syndromes associated with aberrant glycosylation of α-dystroglycan ranges from the severe Walker-Warburg syndrome or muscle-eye-brain disease to mild, late-onset, isolated limb-girdle muscular dystrophy without neural involvement. However, muscular dystrophy is invariably found across the spectrum of MDDG patients. METHODS: Using linkage mapping and whole-exome sequencing in two families with an unexplained neurodevelopmental disorder, we have identified homozygous and compound heterozygous mutations in B3GALNT2...
December 22, 2017: Genome Medicine
https://www.readbyqxmd.com/read/29260337/the-contribution-of-7q33-copy-number-variations-for-intellectual-disability
#13
Fátima Lopes, Fátima Torres, Sally Ann Lynch, Arminda Jorge, Susana Sousa, João Silva, Paula Rendeiro, Purificação Tavares, Ana Maria Fortuna, Patrícia Maciel
Copy number variations (CNVs) at the 7q33 cytoband are very rarely described in the literature, and almost all of the cases comprise large deletions affecting more than just the q33 segment. We report seven patients (two families with two siblings and their affected mother and one unrelated patient) with neurodevelopmental delay associated with CNVs in 7q33 alone. All the patients presented mild to moderate intellectual disability (ID), dysmorphic features, and a behavioral phenotype characterized by aggressiveness and disinhibition...
December 19, 2017: Neurogenetics
https://www.readbyqxmd.com/read/29251763/de-novo-variants-in-klf7-are-a-potential-novel-cause-of-developmental-delay-intellectual-disability-neuromuscular-and-psychiatric-symptoms
#14
Z Powis, I Petrik, J S Cohen, D Escolar, J Burton, C M A van Ravenswaaij-Arts, D A Sival, A P A Stegmann, T Kleefstra, R Pfundt, R Chikarmane, A Begtrup, R Huether, S Tang, D N Shinde
Due to small numbers of reported patients with pathogenic variants in single genes, the phenotypic spectrum associated with genes causing neurodevelopmental disorders such as intellectual disability (ID) and autism spectrum disorder is expanding. Among these genes is KLF7 (Krüppel-like factor 7), which is located at 2q33.3 and has been implicated in several developmental processes. KLF7 has been proposed to be a candidate gene for the phenotype of autism features seen in patients with a 2q33.3q34deletion. Herein, we report four unrelated individuals with de novo KLF7 missense variants who share similar clinical features of developmental delay/ID, hypotonia, feeding/swallowing issues, psychiatric features and neuromuscular symptoms, and add to the knowledge about the phenotypic spectrum associated with KLF7 haploinsufficiency...
December 18, 2017: Clinical Genetics
https://www.readbyqxmd.com/read/29251670/the-road-to-11th-edition-of-the-international-classification-of-diseases-trajectories-of-scientific-consensus-and-contested-science-in-the-classification-of-intellectual-disability-intellectual-developmental-disorders
#15
Luis Salvador-Carulla, Marco Bertelli, Rafael Martinez-Leal
PURPOSE OF REVIEW: To increase the expert knowledge-base on intellectual developmental disorders (IDDs) by investigating the typology trajectories of consensus formation in the classification systems up to the 11th edition of the International Classification of Diseases (ICD-11). This expert review combines an analysis of key recent literature and the revision of the consensus formation and contestation in the expert committees contributing to the classification systems since the 1950s...
December 14, 2017: Current Opinion in Psychiatry
https://www.readbyqxmd.com/read/29249509/what-is-the-relationship-between-autism-spectrum-disorders-and-epilepsy
#16
Roberto Tuchman
The association of epilepsy and autism spectrum disorders (ASD) is best understood by examining the relationship between social cognition, nonsocial cognition, and epilepsy. The relationship between ASD and epilepsy is bidirectional and is strongly linked to intellectual disability (ID). The risk of developing ASD in children with epilepsy is highest in children with early onset seizures, with a high prevalence in children with infantile spasms. The risk of developing epilepsy in children first diagnosed with ASD is highest in those with ID...
November 2017: Seminars in Pediatric Neurology
https://www.readbyqxmd.com/read/29248671/chromatin-in-nervous-system-development-and-disease
#17
EDITORIAL
Shigeki Iwase, Donna M Martin
Epigenetic regulation of gene expression is critical during development of the central nervous system. Pathogenic variants in genes encoding epigenetic factors have been found to cause a wide variety of neurodevelopmental disorders including Autism spectrum disorder, intellectual disability, and epilepsy. Cancers affecting neuronal and glial cells in the brain have also been shown to exhibit somatic mutations in epigenetic regulators, suggesting chromatin-based links between regulated and dysregulated cellular proliferation and differentiation...
December 14, 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/29243349/autosomal-recessive-primary-microcephaly-due-to-aspm-mutations-an-update
#18
Pascaline Létard, Séverine Drunat, Yoann Vial, Sarah Duerinckx, Anais Ernault, Daniel Amram, Stéphanie Arpin, Marta Bertoli, Tiffany Busa, Berten Ceulemans, Julie Desir, Martine Doco-Fenzy, Siham Chafai Elalaoui, Koenraad Devriendt, Laurence Faivre, Christine Francannet, David Geneviève, Marion Gérard, Cyril Gitiaux, Sophie Julia, Sébastien Lebon, Toni Lubala, Michèle Mathieu-Dramard, Hélène Maurey, Julia Metreau, Sanaa Nasserereddine, Mathilde Nizon, Geneviève Pierquin, Nathalie Pouvreau, Clothilde Rivier-Ringenbach, Massimiliano Rossi, Elise Schaefer, Abdelaziz Sefiani, Sabine Sigaudy, Yves Sznajer, Yusuf Tunca, Sophie Guilmin Crepon, Corinne Alberti, Monique Elmaleh-Bergès, Brigitte Benzacken, Bernd Wollnick, C Geoffrey Woods, Anita Rauch, Marc Abramowicz, Vincent El Ghouzzi, Pierre Gressens, Alain Verloes, Sandrine Passemard
Autosomal recessive microcephaly or MicroCephaly Primary Hereditary (MCPH) is a genetically heterogeneous neurodevelopmental disorder characterized by a reduction in brain volume, indirectly measured by an occipitofrontal circumference (OFC) 2 standard deviations or more below the age- and sex-matched mean (-2SD) at birth and -3SD after 6 months, and leading to intellectual disability of variable severity. The Abnormal SPindle-like Microcephaly gene (ASPM), the human ortholog of the Drosophila melanogaster 'abnormal spindle' gene (asp), encodes ASPM, a protein localized at the centrosome of apical neuroprogenitor cells and involved in spindle pole positioning during neurogenesis...
December 14, 2017: Human Mutation
https://www.readbyqxmd.com/read/29234050/a-different-vision-of-dyslexia-local-precedence-on-global-perception
#19
Sandro Franceschini, Sara Bertoni, Tiziana Gianesini, Simone Gori, Andrea Facoetti
Individuals perceive the wor(l)d hierarchically. Firsty, the global visual scene is processed by the right hemisphere, and later, the local features are perceived by the left hemisphere. Based on this hierarchical analysis, humans evolved unique communication ability: reading. However, for about 10% of people reading acquisition is extremely difficult, they are affected by a heritable neurodevelopmental disorder called dyslexia. Differences in perceiving the wor(l)d might be one of the causes of reading disabilities...
December 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29232042/evaluation-of-visual-motion-perception-ability-in-mice-with-knockout-of-the-dyslexia-candidate-susceptibility-gene-dcdc2
#20
Amanda R Rendall, Peter A Perrino, Joseph J LoTurco, R Holly Fitch
Developmental dyslexia is a heritable disability characterized by difficulties in learning to read and write that cannot be explained by comorbid factors such as intellectual impairment, lack of educational opportunity, or other neurological disorders (e.g. epilepsy or primary sensory impairments (blindness, deafness)). Dyslexia is considered a common neurodevelopmental disorder, affecting 5%-12% of the population (Lyon, Shaywitz & Shaywitz, 2003; Peterson & Pennington, 2012). It is also a highly heterogeneous disorder, with varied intermediate phenotypes, that include visual and cross-modal integration deficits...
December 12, 2017: Genes, Brain, and Behavior
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